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Role of Cr Redox and Dynamics in Electrochemical Cycling of HxCrS2−δ 铬氧化还原作用和动力学在 HxCrS2-δ 电化学循环中的作用
IF 8.6 2区 材料科学
Chemistry of Materials Pub Date : 2024-09-27 DOI: 10.1021/acs.chemmater.4c01232
Joseph W. Stiles, Brianna Hoff, Maria C. Curria, Scott B. Lee, Fang Yuan, Guangming Cheng, Fatmagül Katmer, Grigorii Skorupskii, Jiaze Xie, Josh Leeman, Nan Yao, Claire E. White, Craig B. Arnold, Leslie M. Schoop
{"title":"Role of Cr Redox and Dynamics in Electrochemical Cycling of HxCrS2−δ","authors":"Joseph W. Stiles, Brianna Hoff, Maria C. Curria, Scott B. Lee, Fang Yuan, Guangming Cheng, Fatmagül Katmer, Grigorii Skorupskii, Jiaze Xie, Josh Leeman, Nan Yao, Claire E. White, Craig B. Arnold, Leslie M. Schoop","doi":"10.1021/acs.chemmater.4c01232","DOIUrl":"https://doi.org/10.1021/acs.chemmater.4c01232","url":null,"abstract":"H<sub><i>x</i></sub>CrS<sub>2−δ</sub> is produced by the proton exchange of NaCrS<sub>2</sub> and features alternating layers of crystalline and amorphous lamella. It exhibits superior performance as a Na-ion battery electrode compared with its parent compound with faster Na<sup>+</sup> diffusion, higher capacity, and better cyclability. This work explores the nature of the unique biphasic structure of H<sub><i>x</i></sub>CrS<sub>2−δ</sub> using both powder and single-crystal X-ray diffraction, as well as electron microscopy. Additionally, <i>ex situ</i> characterizations using X-ray absorption spectroscopy, X-ray total scattering, and magnetometry are employed to study the mechanism by which this superiority arises. These reveal that migration of Cr does not impede battery performance and may, in fact, be crucial to the observed performance improvements. These studies show that Cr redox is not only possible but abundant in H<sub><i>x</i></sub>CrS<sub>2−δ</sub> while accessing it in NaCrS<sub>2</sub> at lower voltages results in irreversible structural transitions that limit cycling stability. Additionally, we highlight the potential of biphasic structures such as H<sub><i>x</i></sub>CrS<sub>2−δ</sub> to enable high performance in energy storage electrodes.","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":null,"pages":null},"PeriodicalIF":8.6,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142325720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Revisiting Ordered Antifluorite-Type Li14Cr2N8O: Synthesis, Crystal Structure, Theoretical Perspectives, and Catalytic Activity for Ammonia Decomposition 重新审视有序反萤石型 Li14Cr2N8O:合成、晶体结构、理论视角和氨分解催化活性
IF 8.6 2区 材料科学
Chemistry of Materials Pub Date : 2024-09-27 DOI: 10.1021/acs.chemmater.4c02423
Mirabbos Hojamberdiev, Eva M. Heppke, Thomas Bredow, Oscar Gómez-Cápiro, Kunio Yubuta, Katsuya Teshima, Tamanna M. Ahamad, Christian Lorent, Jasper A. Baldauf, Holger Ruland, Rainer Pöttgen, Martin Lerch
{"title":"Revisiting Ordered Antifluorite-Type Li14Cr2N8O: Synthesis, Crystal Structure, Theoretical Perspectives, and Catalytic Activity for Ammonia Decomposition","authors":"Mirabbos Hojamberdiev, Eva M. Heppke, Thomas Bredow, Oscar Gómez-Cápiro, Kunio Yubuta, Katsuya Teshima, Tamanna M. Ahamad, Christian Lorent, Jasper A. Baldauf, Holger Ruland, Rainer Pöttgen, Martin Lerch","doi":"10.1021/acs.chemmater.4c02423","DOIUrl":"https://doi.org/10.1021/acs.chemmater.4c02423","url":null,"abstract":"Ammonia is an efficient compound for hydrogen transportation. The release of hydrogen from ammonia at the point of use is accomplished by the catalytic decomposition of ammonia using commercially available catalysts. Transition metal nitrides with properties similar to those of well-known precious metal-based catalysts exhibit outstanding catalytic activity in ammonia decomposition. Particularly, the cyclical formation and decomposition of certain lithium-based ternary metal nitrides result in improved catalytic activity in the decomposition of ammonia. Since the stability of lithium metal nitride oxides generally exceeds that of lithium metal nitrides, catalysts based on lithium metal nitride oxides are of particular interest for future practical applications. Therefore, this study aims at revisiting the synthesis, crystal structure, and stability from the theoretical perspective of Li<sub>14</sub>Cr<sub>2</sub>N<sub>8</sub>O, as a member of the lithium-based transition metal nitride oxide family. A one-step method is applied to successfully synthesize single-phase Li<sub>14</sub>Cr<sub>2</sub>N<sub>8</sub>O in powder form with high crystallinity. The crystal structure of Li<sub>14</sub>Cr<sub>2</sub>N<sub>8</sub>O is determined to adopt the Na<sub>14</sub>Mn<sub>2</sub>O<sub>9</sub>-type structure. The group-subgroup relation between the antifluorite-type structure and Li<sub>14</sub>Cr<sub>2</sub>N<sub>8</sub>O with the Na<sub>14</sub>Mn<sub>2</sub>O<sub>9</sub>-type structure is elucidated by applying the Bärnighausen formalism. Rietveld refinements and atomic parameters from the literature show equally satisfactory results. The unit-cell parameters obtained for Li<sub>14</sub>Cr<sub>2</sub>N<sub>8</sub>O are <i>a</i> = 5.7936(6) Å and <i>c</i> = 8.20634(11) Å (trigonal crystal system). Theoretical studies by density functional theory (DFT) are conducted to explore the stability of Li<sub>14</sub>Cr<sub>2</sub>N<sub>8</sub>O with respect to anion order and exchange, the magnetic ground state, and the oxidation state of chromium. The findings of this study pave the way for Li<sub>14</sub>Cr<sub>2</sub>N<sub>8</sub>O to be further explored as an important catalyst for the decomposition of ammonia to generate hydrogen.","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":null,"pages":null},"PeriodicalIF":8.6,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142325317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Interface Nucleophilic Substitution Reaction-Driven Precise Growth of Ag2Te Quantum Dots 界面亲核取代反应驱动的 Ag2Te 量子点精确生长
IF 8.6 2区 材料科学
Chemistry of Materials Pub Date : 2024-09-27 DOI: 10.1021/acs.chemmater.4c00026
Zheng Li, Jun Xu, Wei Xie, Dongbing Zhao, Zhen-Ya Liu, Xian Yang, Haohao Fu, Shijia Jiang, Wei Zhao, Ming-Yu Zhang, An-An Liu, Dai-Wen Pang
{"title":"Interface Nucleophilic Substitution Reaction-Driven Precise Growth of Ag2Te Quantum Dots","authors":"Zheng Li, Jun Xu, Wei Xie, Dongbing Zhao, Zhen-Ya Liu, Xian Yang, Haohao Fu, Shijia Jiang, Wei Zhao, Ming-Yu Zhang, An-An Liu, Dai-Wen Pang","doi":"10.1021/acs.chemmater.4c00026","DOIUrl":"https://doi.org/10.1021/acs.chemmater.4c00026","url":null,"abstract":"Surface ligands of quantum dots (QDs) play pivotal roles in determining their optical properties and stability during the growth process. The stability and continuous growth of nanocrystals are crucial to precisely tuning their properties. However, the dilemma surrounding the stability of nanocrystals and their continuous growth remains unsolved, posing a formidable challenge. Herein, we have proposed a strategy for precise tuning of Ag<sub>2</sub>Te QD growth driven by nucleophilic substitution reaction (SN2) between surface-bound thiol ligands and halogenated hydrocarbons (RX, X = Cl, Br, I), prompted by the generation of silver halide precipitate. As a result, Ag<sub>2</sub>Te QDs with emission wavelengths precisely and continuously tunable in the range of 1176–2023 nm have been successfully synthesized in one pot. As the reaction advances, the quantity of the more strongly coordinating RS<sup>–</sup> gradually diminishes, while that of the weaker coordinating dioctyl sulfide gradually increases. This dynamic process enables the growth of the QDs. The rate of the SN2 reaction can be adjusted by varying the species and concentration of RX, as well as the amount of Ag species, significantly influencing the growth rate of the QDs, a crucial factor for resolving the dilemma between the stability and tunability of the QDs. Additionally, this proposed strategy holds the potential to modulate the properties of various nanoparticles through chemical reactions at the interfaces.","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":null,"pages":null},"PeriodicalIF":8.6,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142324877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cooling Mixed A-Site Halide Perovskites: Impact of Temperature on Optical and Structural Properties 冷却混合 A 盐基卤化物包光体:温度对光学和结构特性的影响
IF 8.6 2区 材料科学
Chemistry of Materials Pub Date : 2024-09-26 DOI: 10.1021/acs.chemmater.4c02026
Colette M. Sullivan, Jason E. Kuszynski, Alexey Kovalev, Nozomi Shirato, Volker Rose, Sarah Wieghold, Theo Siegrist, Richard D. Schaller, Geoffrey F. Strouse, Lea Nienhaus
{"title":"Cooling Mixed A-Site Halide Perovskites: Impact of Temperature on Optical and Structural Properties","authors":"Colette M. Sullivan, Jason E. Kuszynski, Alexey Kovalev, Nozomi Shirato, Volker Rose, Sarah Wieghold, Theo Siegrist, Richard D. Schaller, Geoffrey F. Strouse, Lea Nienhaus","doi":"10.1021/acs.chemmater.4c02026","DOIUrl":"https://doi.org/10.1021/acs.chemmater.4c02026","url":null,"abstract":"The widespread utilization of perovskite-based photovoltaics requires probing both the structural and optical properties under extreme operating conditions to gain a holistic understanding of the material behavior under stressors. Here, we investigate the temperature-dependent behavior of mixed A-site cation lead triiodide perovskite thin films (85% methylammonium and 15% formamidinium) in the range from 300 to 20 K. Through a combination of optical and structural techniques, we find that the tetragonal-to-orthorhombic phase transition occurs at ∼110 K for this perovskite composition, as indicated by the change in the diffraction pattern. With decreasing temperature, the quantum yield increases with a concurrent elongation of the carrier lifetimes, indicating suppression of nonradiative recombination pathways. Interestingly, in contrast to single A-site cation perovskites, an additional optical transition appears in the absorption spectrum when the phase transition is approached, which is also reflected in the emission spectrum. We propose that the splitting of the optical absorption and emission is due to local segregation of the mixed cation perovskite during the phase transition.","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":null,"pages":null},"PeriodicalIF":8.6,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142321071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Active–Inactive Molten Salt Synthesis of Li- and Mn-Rich Layered Oxide Single Crystals as Cathode Materials for All-Solid-State Batteries 活性-非活性熔盐合成富锂离子和锰离子层状氧化物单晶作为全固态电池的阴极材料
IF 8.6 2区 材料科学
Chemistry of Materials Pub Date : 2024-09-26 DOI: 10.1021/acs.chemmater.4c01762
Seung Hyun Choi, Gawon Song, Kyobin Park, Soon-Kie Hong, Byunghyun Yun, Suyeon Lee, Kyu Tae Lee
{"title":"Active–Inactive Molten Salt Synthesis of Li- and Mn-Rich Layered Oxide Single Crystals as Cathode Materials for All-Solid-State Batteries","authors":"Seung Hyun Choi, Gawon Song, Kyobin Park, Soon-Kie Hong, Byunghyun Yun, Suyeon Lee, Kyu Tae Lee","doi":"10.1021/acs.chemmater.4c01762","DOIUrl":"https://doi.org/10.1021/acs.chemmater.4c01762","url":null,"abstract":"Micrometer-sized layered oxide single crystals are considered promising cathode materials for all-solid-state batteries (ASSBs) due to their superior properties compared to those of polycrystalline forms. In addition, Li- and Mn-rich layered oxides (LMRO), represented by the formula <i>x</i>Li<sub>2</sub>MnO<sub>3</sub>·(1–<i>x</i>)LiTMO<sub>2</sub> (where TM = Ni, Co, and Mn), are noted for their higher energy densities and cost-effectiveness relative to conventional layered LiNi<sub>1–<i>y</i>–<i>z</i></sub>Co<sub><i>y</i></sub>Mn<sub><i>z</i></sub>O<sub>2</sub> materials. In this regard, micrometer-sized, monodisperse, and discrete LMRO single crystals are synthesized using an active–inactive molten salt method that exploits the high reactivity of LiOH and the negligible reactivity of Li<sub>2</sub>SO<sub>4</sub>. This approach overcomes the challenges associated with conventional molten salt synthesis in controlling the structure and composition of LMRO. The chemical reactivities of lithium salts (LiOH, LiNO<sub>3</sub>, and Li<sub>2</sub>SO<sub>4</sub>) with transition metal hydroxide precursors are examined to synthesize LMRO single crystals. Our findings show that LiOH and LiNO<sub>3</sub> are highly reactive, whereas Li<sub>2</sub>SO<sub>4</sub> remains significantly inert. For this reason, the active–active LiOH–LiNO<sub>3</sub> system forms the LMRO structure (0.73Li<sub>2</sub>MnO<sub>3</sub>·0.27Li[Ni<sub>0.37</sub>Co<sub>0.63</sub>]O<sub>2</sub>) with Mn-free NCM domains, regardless of the molar fractions of LiOH in LiOH–LiNO<sub>3</sub>. In contrast, the active–inactive LiOH–Li<sub>2</sub>SO<sub>4</sub> system undergoes significant transformations from spinel to layered structures upon variation of the molar fraction of LiOH. At a LiOH molar fraction of 0.82, this system ultimately forms monodisperse LMRO single crystals (0.65Li<sub>2</sub>MnO<sub>3</sub>·0.35Li[Ni<sub>0.3</sub>Co<sub>0.5</sub>Mn<sub>0.2</sub>]O<sub>2</sub>) with Mn-containing NCM domains. Moreover, LMRO single crystals are investigated as high-capacity cathode materials for ASSBs. In particular, LMRO single crystals (0.65Li<sub>2</sub>MnO<sub>3</sub>·0.35Li[Ni<sub>0.3</sub>Co<sub>0.5</sub>Mn<sub>0.2</sub>]O<sub>2</sub>) demonstrate excellent electrochemical performance in ASSBs, achieving high reversible capacities of 220 mA h g<sup>–1</sup> and stable capacity retention over 300 cycles. These findings underscore the critical role of lithium salt reactivity in determining the structural and compositional characteristics of LMRO single crystals during synthesis, providing valuable insights for improving the electrochemical performance of high-capacity LMRO cathode materials in ASSBs.","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":null,"pages":null},"PeriodicalIF":8.6,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142325315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Venturing into Unexplored Phase Space: Synthesis, Structure, and Properties of MgCo3B2 Featuring a Rumpled Kagomé Network 探索未知的相空间:具有皱褶卡戈梅网络的 MgCo3B2 的合成、结构和特性
IF 8.6 2区 材料科学
Chemistry of Materials Pub Date : 2024-09-26 DOI: 10.1021/acs.chemmater.4c01999
Paul Oftedahl, Nawsher J. Parvez, Zhen Zhang, Yang Sun, Vladimir Antropov, John Q. Xiao, Julia V. Zaikina
{"title":"Venturing into Unexplored Phase Space: Synthesis, Structure, and Properties of MgCo3B2 Featuring a Rumpled Kagomé Network","authors":"Paul Oftedahl, Nawsher J. Parvez, Zhen Zhang, Yang Sun, Vladimir Antropov, John Q. Xiao, Julia V. Zaikina","doi":"10.1021/acs.chemmater.4c01999","DOIUrl":"https://doi.org/10.1021/acs.chemmater.4c01999","url":null,"abstract":"MgCo<sub>3</sub>B<sub>2</sub>, a novel ternary boride in a previously unexplored phase space, was synthesized using the hydride route. In situ powder X-ray diffraction and DFT calculations aided in the discovery of this compound, whose structure was then determined by single-crystal X-ray diffraction. Like the closely related CeCo<sub>3</sub>B<sub>2</sub>, MgCo<sub>3</sub>B<sub>2</sub> crystallizes in centrosymmetric space group <i>P</i>6/<i>mmm</i> (<i>a</i> = 4.883(2) Å, <i>c</i> = 2.926(2) Å at 210 K, <i>Z</i> = 1). Unlike CeCo<sub>3</sub>B<sub>2</sub>, however, it adopts a disordered structure that features a rumpled Kagomé network of Co atoms, and Mg atoms fill the channels of a Co–B framework. Although the structural disorder leads to motifs that are similar to those observed in MgNi<sub>3</sub>B<sub>2</sub> and other related ternary borides, no evidence of an ordered superstructure was found by single-crystal X-ray diffraction or high-resolution powder X-ray diffraction. In the case of CeCo<sub>3</sub>B<sub>2</sub>, boron atoms occupy the center of regular Co<sub>6</sub> trigonal prisms; in MgCo<sub>3</sub>B<sub>2</sub>, boron atoms are shifted from the center of the prism to form B–B dimers with roughly the same length as those found in MgNi<sub>3</sub>B<sub>2</sub>. Magnetic susceptibility data exhibit an unusual temperature dependence that cannot be convincingly modeled by the modified Curie–Weiss equation, consistent with DFT calculations predicting a nonmagnetic ground state. Intrinsic susceptibility at 300 K is 1.42 × 10<sup>–3</sup> emu/mol Oe, which is comparable to that of paramagnetic YCo<sub>3</sub>B<sub>2</sub> and CeCo<sub>3</sub>B<sub>2</sub> with a similar structure and composition. This study showcases the efficacy of combining several methodologies to discover new solids in unexplored phase spaces. This approach includes in situ PXRD data to monitor reactions of precursors upon heating, a diffusion-enhanced synthesis method, and DFT assessment of compound stability.","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":null,"pages":null},"PeriodicalIF":8.6,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142325314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Correction to “Microwave-Mediated Synthesis of Lead-Free Cesium Titanium Bromide Double Perovskite: A Sustainable Approach” 对 "微波介导的无铅铯钛溴化物双包晶石的合成:一种可持续的方法 "的更正一种可持续的方法"
IF 8.6 2区 材料科学
Chemistry of Materials Pub Date : 2024-09-25 DOI: 10.1021/acs.chemmater.4c02554
Emmanuel Reyes-Francis, Carlos Echeverría-Arrondo, Diego Esparza, Tzarara López-Luke, Tatiana Soto-Montero, Monica Morales-Masis, Silver-Hamill Turren-Cruz, Iván Mora-Seró, Beatriz Julián-López
{"title":"Correction to “Microwave-Mediated Synthesis of Lead-Free Cesium Titanium Bromide Double Perovskite: A Sustainable Approach”","authors":"Emmanuel Reyes-Francis, Carlos Echeverría-Arrondo, Diego Esparza, Tzarara López-Luke, Tatiana Soto-Montero, Monica Morales-Masis, Silver-Hamill Turren-Cruz, Iván Mora-Seró, Beatriz Julián-López","doi":"10.1021/acs.chemmater.4c02554","DOIUrl":"https://doi.org/10.1021/acs.chemmater.4c02554","url":null,"abstract":"The authors regret an error in the acknowledgments section of the original article. A correction has now been made. The previously stated sentence read: “S.H.T.C would like to thank the Spanish Ministry of Economy, Industry and Competitiveness (postdoctoral contract Juan de la Cierva Formación FJC2019-041835-I) and POLONES BIS 1 (DEC-2021/43/P/ST5/01780) for the financial support during this work.” A sentence was inadvertently omitted in the published version. The corrected acknowledgment now reads: “S.H.T.C would like to thank the Spanish Ministry of Economy, Industry and Competitiveness (postdoctoral contract Juan de la Cierva Formación FJC2019-041835-I) and POLONEZ BIS project No. 2021/43/P/ST5/01780 co-funded by the National Science Centre and the EU’s H2020 research and innovation programme under the MSCA 945339 for the financial support during this work.” This revision does not affect the main text and the conclusion of the published article. The authors would like to apologize for any inconvenience caused. S.H.T.C would like to thank the Spanish Ministry of Economy, Industry and Competitiveness (postdoctoral contract Juan de la Cierva Formación FJC2019-041835-I) and POLONEZ BIS project No. 2021/43/P/ST5/01780 co-funded by the National Science Centre and the EU’s H2020 research and innovation programme under the MSCA 945339 for the financial support during this work. This article has not yet been cited by other publications.","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":null,"pages":null},"PeriodicalIF":8.6,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142317458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multi-Scale Computational Design of Metal–Organic Frameworks for Carbon Capture Using Machine Learning and Multi-Objective Optimization 利用机器学习和多目标优化对用于碳捕集的金属有机框架进行多尺度计算设计
IF 8.6 2区 材料科学
Chemistry of Materials Pub Date : 2024-09-25 DOI: 10.1021/acs.chemmater.4c01969
Zijun Deng, Lev Sarkisov
{"title":"Multi-Scale Computational Design of Metal–Organic Frameworks for Carbon Capture Using Machine Learning and Multi-Objective Optimization","authors":"Zijun Deng, Lev Sarkisov","doi":"10.1021/acs.chemmater.4c01969","DOIUrl":"https://doi.org/10.1021/acs.chemmater.4c01969","url":null,"abstract":"In this article, we computationally design a series of metal–organic frameworks (MOFs) optimized for postcombustion carbon capture. Our workflow includes assembling building blocks and topologies into an initial set of hypothetical MOFs, using genetic algorithms to optimize this initial set for high CO<sub>2</sub>/N<sub>2</sub> selectivity, and further evaluating the top materials through process-level modeling of their performance in a modified Skarstrom cycle. We identify two groups of MOFs that exhibit excellent process performance: one with relatively small pores in the range of 3–5 Å and another with larger pores of 6–30 Å. The performance of the first group is driven effectively by the exclusion of N<sub>2</sub> from adsorption, with binding sites able to accommodate only CO<sub>2</sub> molecules. The second group, with larger pores, features binding sites where CO<sub>2</sub> molecules form multiple interactions with oxygen and functional groups of several building blocks, leading to a high CO<sub>2</sub>/N<sub>2</sub> selectivity. Within the employed process model and its assumptions, the materials generated in this study substantially outperform 13X reference zeolites, in silico optimized ion-exchanged LTA zeolites, and CALF-20. While this study does not address the synthesizability, stability, or water interactions of the proposed materials, it marks a significant step forward in developing practical MOFs for carbon capture in three key areas. First, it introduces a generative workflow based on the process-level performance of new materials. Second, it identifies structural features of optimal MOFs for carbon capture, which can serve as design guidelines for future development. Finally, the potential existence of numerous promising materials offers hope that some may progress to laboratory testing and eventual scale-up.","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":null,"pages":null},"PeriodicalIF":8.6,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142317381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optoelectronic Properties of PbS Nanocrystals Preserved through L-Type Ligand Surface Reactivity 通过 L 型配体表面反应性保持 PbS 纳米晶体的光电特性
IF 8.6 2区 材料科学
Chemistry of Materials Pub Date : 2024-09-24 DOI: 10.1021/acs.chemmater.4c01287
Christian Y. Dones Lassalle, Jillian L. Dempsey
{"title":"Optoelectronic Properties of PbS Nanocrystals Preserved through L-Type Ligand Surface Reactivity","authors":"Christian Y. Dones Lassalle, Jillian L. Dempsey","doi":"10.1021/acs.chemmater.4c01287","DOIUrl":"https://doi.org/10.1021/acs.chemmater.4c01287","url":null,"abstract":"In this work, <sup>1</sup>H NMR and photoluminescence spectroscopies have been leveraged to identify how amine-terminated molecules react with the surface of oleate-capped PbS nanocrystals (NCs) and impact their optical properties. The alkyl amine undec-10-ene-1-amine binds weakly to the NC surface and promotes the displacement of the native Z-type ligand Pb(oleate)<sub>2</sub>. Through systematic experiments, we deconvolute the parallel reaction mechanisms that drive this reactivity. The binding and displacement reactivity results in a net-zero change in the NC emission, attributed to preservation of the electronic structure of PbS NCs through surface restructuring. The photoluminescence of PbS NCs remains robust even when exposed to bulky chelating diamines that exclusively promote displacement of Z-type ligands, reactivity that slightly quenches NC emission by exposing undercoordinated chalcogenides and forming trap states. This work improves fundamental understanding of NC surface reactivity with L-type ligands and their potential impact in developing improved NCs.","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":null,"pages":null},"PeriodicalIF":8.6,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142313530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fast Sodium-Ion Conducting Amorphous Oxychloride Embedding Nanoparticles 快速钠离子传导无定形盐酸嵌入纳米粒子
IF 8.6 2区 材料科学
Chemistry of Materials Pub Date : 2024-09-24 DOI: 10.1021/acs.chemmater.4c02104
Kota Motohashi, Hirofumi Tsukasaki, Shigeo Mori, Atsushi Sakuda, Akitoshi Hayashi
{"title":"Fast Sodium-Ion Conducting Amorphous Oxychloride Embedding Nanoparticles","authors":"Kota Motohashi, Hirofumi Tsukasaki, Shigeo Mori, Atsushi Sakuda, Akitoshi Hayashi","doi":"10.1021/acs.chemmater.4c02104","DOIUrl":"https://doi.org/10.1021/acs.chemmater.4c02104","url":null,"abstract":"Developing materials with high sodium-ion conductivities is crucial for improving the electrochemical performance of all-solid-state batteries. Halide solid electrolytes are promising owing to their high conductivity, formability, and oxidation stability. However, state-of-the-art sodium-ion-conducting halides are not as high in conductivity as expected and lack reduction stability. In this study, we report oxychlorides in a ternary system NaCl–TaCl<sub>5</sub>–Ta<sub>2</sub>O<sub>5</sub> with high conductivities, formabilities, and oxidation and reduction stabilities. The mechanochemically prepared samples are composed of NaCl and Ta<sub>2</sub>O<sub>5</sub> nanoparticles embedded in an Na–Ta–Cl–O amorphous matrix, possessing ionic conductivities of 2.5 × 10<sup>–3</sup> S cm<sup>–1</sup> at 25 °C and electrochemical potential windows of 0.4–4.1 versus Na<sup>+</sup>/Na. Compression tests reveal that the nanoparticles in the oxychloride electrolytes improve the mechanical strength. Our findings will facilitate the development of solid electrolytes composed of nanoparticles balanced with high ionic conductivities, formabilities, and electrochemical stabilities.","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":null,"pages":null},"PeriodicalIF":8.6,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142313563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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