Inorganic Chemistry Frontiers最新文献

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Facile one-pot synthesis of high-purity sodium antimony chalcogenides in polar solvents
IF 7 1区 化学
Inorganic Chemistry Frontiers Pub Date : 2024-12-04 DOI: 10.1039/d4qi02941k
Saeed Ahmadi Vaselabadi, Brynn Benham, Colin A. Wolden
{"title":"Facile one-pot synthesis of high-purity sodium antimony chalcogenides in polar solvents","authors":"Saeed Ahmadi Vaselabadi, Brynn Benham, Colin A. Wolden","doi":"10.1039/d4qi02941k","DOIUrl":"https://doi.org/10.1039/d4qi02941k","url":null,"abstract":"Alkali metal chalcogenides have emerged as a new class of inorganic materials with diverse applications in energy conversion and storage owing to their structural versatility and wide range of properties. Strategies are needed for simple and cost-efficient synthetic approaches that enable the composition and functional properties of these materials to be systematically tuned. Herein, we present a novel wet-chemistry approach to produce ternary Na-based metal chalcogenides with varying compositions. Phase-pure Na<small><sub>3</sub></small>SbCh<small><sub>4</sub></small> (Ch = S, Se) solid-state electrolytes are synthesized in a single-step fashion by reacting an ethanolic solution of Na chalcogenides with appropriately selected metal halides at room temperature. This process simplifies the reaction protocols, improves yield, and decreases the raw material loss incurred in multistep systems by eliminating the need for phase-pure binary metal chalcogenides. The reaction mechanisms and impurity profile of various sodium metal chalcogenides introduced in this work were methodically investigated through characterization techniques such as X-ray diffraction (XRD) and Raman spectroscopy. Among the chalcogenides, synthesis of the sulfide compounds (∼99 wt% purity) was straightforward, achieving a yield of 92–95% whereas the selenides required more control to generate the appropriate mix of precursors, which resulted in a lower yield of 74–79% but with a high purity of 97.5–99.6 wt%. Electrochemical impedance spectroscopy of as-synthesized Na<small><sub>3</sub></small>SbCh<small><sub>4</sub></small> (Ch = S, Se) showed a high ionic conductivity of 0.17–0.38 mS cm<small><sup>−1</sup></small> and low activation energy of 0.19–0.21 eV comparable with other reports of solution-based synthesis. The one-pot scheme was successfully extended to the NaSbCh<small><sub>2</sub></small> (Ch = S, Se) system, producing phase pure ternary sodium metal chalcogenides with tunable band gaps (1.6–1.8 eV) appropriate for solar energy conversion applications. The “one-pot” approach offers a simple yet economical route for scalable production of bulk sodium ternary chalcogenides at ambient conditions.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"207 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142763089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The controllable loading of Fe/Co alloy on heteroatom doped hollow graphene spheres realized by small molecule regulation for rechargeable zinc-air batteries
IF 7 1区 化学
Inorganic Chemistry Frontiers Pub Date : 2024-12-04 DOI: 10.1039/d4qi02166e
Yefei Ma, Qiushi Wang, Xia Xiao, Zhong-Jie Jiang, Weiheng Chen, Xiaoning Tian, Zhongqing Jiang
{"title":"The controllable loading of Fe/Co alloy on heteroatom doped hollow graphene spheres realized by small molecule regulation for rechargeable zinc-air batteries","authors":"Yefei Ma, Qiushi Wang, Xia Xiao, Zhong-Jie Jiang, Weiheng Chen, Xiaoning Tian, Zhongqing Jiang","doi":"10.1039/d4qi02166e","DOIUrl":"https://doi.org/10.1039/d4qi02166e","url":null,"abstract":"Although transition metals as the bifunctional catalysts of zinc-air batteries (ZABs) have obvious price advantages, their performance in ZABs still fails to meet expectations due to the uncontrollable loading caused by the rapid nucleation rate of transition metals. In this study, the controllable loading of Fe/Co alloy on heteroatom doped hollow graphene spheres (FeCo@NGHS) realized by the regulation of small molecule.Sodium citrate, which acted as metal complexing agent and reaction buffer, can effectively suppress the excessive loading of Fe/Co alloy particles and facilitate the formation of Fe(Co)Nx active sites. Melamine, which acted as precursor of N atoms doping, can provide anchor points for the loading of Fe/Co alloy particles and participate in the generation of Fe(Co)Nx. The fabricated catalyst has active sites with different chemical structures, such as pyridine-N, graphite-N, Fe(Co)Nx and Fe/Co alloy particle, all of which will benefit the improvement of oxygen reduction reaction/oxygen evolution reaction (ORR /OER) performance. The result shows that the fabricated FeCo@NGHS, which possesses the appropriate amount of Fe/Co alloy particles combined the highest amount of formed Fe(Co)Nx active sites, exhibits the best ORR/OER bifunctional catalytic performance in alkaline electrolyte and excellent electrocatalytic stability. The ORR onset potential and half-wave potential are 0.961 V and 0.846 V (vs. RHE), respectively. And the overpotential of OER can achieve a low level of 391 mV at current density of 10 mA cm-2. Furthermore, the rechargeable liquid ZAB and flexible all-solid-state (ASS) ZAB assembled by FeCo@NGHS exhibits higher discharge power density and longer charge-discharge cycle performance. FeCo@NGHS based air cathodes exhibit outstanding performance in flexible ASS-ZABs, showing high open circuit voltage (1.45 V) and peak power density (74.06 mW cm-2). In clean energy storage and conversion technologies, a new synthetic strategy for constructing excellent bifunctional oxygen electrocatalysts is proposed in this work.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"3 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142763165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Room-temperature phosphorescence and dual-emission behavior of simple biphenyl derivatives unlocked by intermolecular interaction with cyclic silver pyrazolate
IF 7 1区 化学
Inorganic Chemistry Frontiers Pub Date : 2024-12-04 DOI: 10.1039/d4qi02624a
Arina P. Olbrykh, Alisia Tsorieva, Vladislav Korshunov, Alexander F. Smol’yakov, Ivan A. Godovikov, Alexander Korlyukov, Ilya V. Taydakov, Aleksei Titov, Oleg A. Filippov, Elena Shubina
{"title":"Room-temperature phosphorescence and dual-emission behavior of simple biphenyl derivatives unlocked by intermolecular interaction with cyclic silver pyrazolate","authors":"Arina P. Olbrykh, Alisia Tsorieva, Vladislav Korshunov, Alexander F. Smol’yakov, Ivan A. Godovikov, Alexander Korlyukov, Ilya V. Taydakov, Aleksei Titov, Oleg A. Filippov, Elena Shubina","doi":"10.1039/d4qi02624a","DOIUrl":"https://doi.org/10.1039/d4qi02624a","url":null,"abstract":"The complexation of 4,4'-halogen-substituted biphenyls (BPs) with a trinuclear silver(I) 3,5-bis(trifluoromethyl)pyrazolate adduct ([AgL]3) is observed in the solution and the solid state. The infinite stacks are formed by alternatingly BPs and [AgL]3 molecules via multiple metal-π interactions in a crystal. Encapsulation of the biphenyl derivatives between the [AgL]3 units allows room-temperature phosphorescence in the solid state. Furthermore, the intercalation of BPs results in the formation of planar geometry, which allows the reduction of non-radiative relaxation and enhances luminescence due to the planar geometry of the excited states. Another crucial factor in efficient light emission is the asymmetry of the intermolecular complexes. Complexes obtained exhibit both phosphorescent and fluorescent bands, spanning a wide covering wide spectral range. Fine-tuning of emission by varying the excitation energy could produce white light","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"261 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142763088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Efficient electrosynthesis of alanine from α-keto acids over self-supported electrocatalyst with superior activity
IF 7 1区 化学
Inorganic Chemistry Frontiers Pub Date : 2024-12-03 DOI: 10.1039/d4qi02520b
Min Xu, Shengbo Zhang, Jiafang Liu, Hui Xu, Yong Jiang, Yunxia Zhang, Guozhong Wang, Haimin Zhang
{"title":"Efficient electrosynthesis of alanine from α-keto acids over self-supported electrocatalyst with superior activity","authors":"Min Xu, Shengbo Zhang, Jiafang Liu, Hui Xu, Yong Jiang, Yunxia Zhang, Guozhong Wang, Haimin Zhang","doi":"10.1039/d4qi02520b","DOIUrl":"https://doi.org/10.1039/d4qi02520b","url":null,"abstract":"Currently, electrocatalytic reductive amination of α-keto acids can achieve efficient, sustainable, and environmentally friendly production of amino acids under environmental conditions, developing efficient electrocatalysts is crucial for electrochemical amino acid synthesis. Herein, we have realized the one-step electrosynthesis of alanine using biomass-derived pyruvic acid (PA) and NH2OH as the raw reactants in Na2SO4 electrolyte over self-supported Cu/Ti electrode. The Cu/Ti self-supported electrode exhibited excellent electrocatalytic performance with a high alanine yield of 324 μmol and a favorable Faraday efficiency (FE) of 90.5% at −0.62 V (vs. RHE). The in-situ X-ray absorption spectroscopy (XAS) analyses indicated that the electron transfer from Ti substrate to deposited Cu site, and the resulting electron-rich Cu sites are favourable for the adsorption of intermediates and inhibit the competitive reaction of the hydrogen evolution reaction (HER), enhancing the alanine selectivity. Further in-situ attenuated total reflection surface-enhanced infrared adsorption spectroscopy (ATR-SEIRAS) verified the reaction path during the electrochemical amino acid synthesis. Moreover, over 10 kinds of amino acids have been successfully electro-synthesized. Except for alanine, the obtained FEs of over six amino acids are 64.8-74.1%. This strategy opens a sustainable and green way for amino acids synthesis under ambient conditions using renewable energy.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"52 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rapid synthesis and hydrothermal stability enhancement of Cu-SSZ-13 zeolites for nitrogen oxide removal
IF 7 1区 化学
Inorganic Chemistry Frontiers Pub Date : 2024-12-03 DOI: 10.1039/d4qi02594f
Jie Su, Zhe Ma, Yingzhen Wei, Yida Zhou, Mao Shen, Shibin Ren, De-Man Han, Mengyang Chen, Wenfu Yan
{"title":"Rapid synthesis and hydrothermal stability enhancement of Cu-SSZ-13 zeolites for nitrogen oxide removal","authors":"Jie Su, Zhe Ma, Yingzhen Wei, Yida Zhou, Mao Shen, Shibin Ren, De-Man Han, Mengyang Chen, Wenfu Yan","doi":"10.1039/d4qi02594f","DOIUrl":"https://doi.org/10.1039/d4qi02594f","url":null,"abstract":"Cu-SSZ-13 (CHA zeotype) zeolites are commenly used in diesel engines for the selective catalytic reduction (NH3-SCR) of nitrogen oxides (NOx). However, their synthesis typically requires long crystallization times, and their durability in NH3-SCR is limited. Herein, we achieved a significant reduction in crystallization time, synthesizing SSZ-13 zeolites in just 6 h by using SAPO-18 seeds and a minimal amount of organic structure-directing agent (OSDA). The OSDA/Si ratio was reduced by a factor of 16 compared to conventional methods. Crystallization studies revealed that SAPO-18 seeds promoted the formation of four-membered rings (4MRs), which quickly combined into double 6-membered rings (D6Rs) with the assistance of OSDA, enabling rapid crystallization of SSZ-13. The resulting Cu-SSZ-13 demonstrated comparable NH3-SCR performance to conventionally synthesized Cu-SSZ-13 (Cuconv-SSZ-13). Moreover, we introduced Ce ions into Cu-SSZ-13 to enhance its hydrothermal stability and explored the effects of different metal precursors on catalytic performance. The optimized CuCe(III)0.5-SSZ-13 exhibited superior hydrothermal stability compared to Cu-SSZ-13. Conversely, CuCe(IV)1.0-SSZ-13 and CuCe(III)0.5Ce(IV)1.0-SSZ-13 displayed reduced hydrothermal stability. Characterization revealed that using Ce(III) precursor inhibited CuOx formation during hydrothermal ageing, while the Ce(IV) precursor favored the formation of CeO2, decreasing zeolite stability and promoting CuOx formation. This work presents a novel approach for rapid SSZ-13 synthesis and highlights the critical role of metal precursors in the performance of bimetallic SSZ-13 zeolites.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"82 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The spatial and electronic effects of polypyrrole between MnO2 layers enhance the diffusion ability of Zn2+ ions
IF 7 1区 化学
Inorganic Chemistry Frontiers Pub Date : 2024-12-03 DOI: 10.1039/d4qi02739f
Le Li, Shaofeng Jia, Yue Shi, Yuanyuan Yang, Chao Tan, Conghui Wang, Hengwei Qiu, Yongqiang Ji, Minghui Cao, Dan Zhang
{"title":"The spatial and electronic effects of polypyrrole between MnO2 layers enhance the diffusion ability of Zn2+ ions","authors":"Le Li, Shaofeng Jia, Yue Shi, Yuanyuan Yang, Chao Tan, Conghui Wang, Hengwei Qiu, Yongqiang Ji, Minghui Cao, Dan Zhang","doi":"10.1039/d4qi02739f","DOIUrl":"https://doi.org/10.1039/d4qi02739f","url":null,"abstract":"The new electrochemical energy storage system proposed more stringent requirements for energy storage materials, and the traditional MnO2 can no longer completed the corresponding requirements because of the problems of electrical conductivity and phase transition. In this work, a novel polypyrrole (PPy) intercalation MnO2 (MnO2/PPy-x) material was prepared and proved to be suitable for high performance cathode of aqueous zinc ion batteries (AZIBs). The material characterization results proved that PPy played a pillar role between MnO2 layers, and the reduced of Mn oxidation state and the extension of Mn−O bond to inhibited the distortion reaction of MnO2, resulting in enhanced structural stability and excellent cycle life. In addition, electrochemical analysis revealed the H+/Zn2+ co-intercalation mechanism, and MnO2/PPy-1 has high electrical conductivity and fast reaction kinetics. Density functional theory (DFT) calculation proved that the change of electron distribution between MnO2 layers. The PPy endowed MnO2 with excellent electrical conductivity. Moreover, as an interlayer spacer, it hindered the charge transfer behavior and decreased the binding ability between Zn2+ and MnO2. As a result, the electrochemical performance of MnO2/PPy-1 was greatly enhanced. The final results demonstrated that MnO2/PPy-1, which has higher conductivity and wider layer spacing, offered a superior capacity of 234 mAh g⁻¹ and a long cycle life of 2000 cycles at a current density of 1 A g⁻¹. In addition, according to the test results of pouch batteries. MnO2/PPy-1 showed great potential in the flexible device market because of superior flexibility and safety. This work provided a new method and approach for the modification of MnO2-based materials.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"33 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exploration of Functional Group Effects on D2/H2 Separation Selectivity within the UiO-66 Framework
IF 7 1区 化学
Inorganic Chemistry Frontiers Pub Date : 2024-12-03 DOI: 10.1039/d4qi02802c
Xiufang Li, Yan-Xi Tan, Zhanfeng Ju, Wenjing Wang, Daqiang Yuan
{"title":"Exploration of Functional Group Effects on D2/H2 Separation Selectivity within the UiO-66 Framework","authors":"Xiufang Li, Yan-Xi Tan, Zhanfeng Ju, Wenjing Wang, Daqiang Yuan","doi":"10.1039/d4qi02802c","DOIUrl":"https://doi.org/10.1039/d4qi02802c","url":null,"abstract":"The efficient separation of deuterium from hydrogen remains a significant challenge due to the limitations of convention-al techniques, such as cryogenic distillation and the Girdler-Sulfide process combined with electrolysis, which are char-acterized by substantial energy demands and relatively low separation coefficients. In contrast, the quantum sieving ef-fect, based on porous materials, offers a promising approach to overcoming these challenges. This study presents a novel application of strong adsorption sites (μ3-OH group) within the nanoporous metal-organic framework of UiO-66 for hy-drogen isotope separation. By incorporating diverse organic functional groups into UiO-66, we successfully synthesized four derivative materials: UiO-66-NH2, UiO-66-CH3, UiO-66-NO2, and UiO-66-Ph. Experimental data reveal that the in-troduction of these functional groups modulated the material's pore size and channel polarity, significantly impacting its adsorption and separation performance for hydrogen isotopes. Notably, UiO-66-NH2, with the smallest pore size and highest channel polarity, exhibited superior hydrogen isotope adsorption capacity and selectivity, highlighting its poten-tial as an effective adsorbent for isotope separation.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"5 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Viologen Doping Induced Charge Storage of Carbon Nitride for Enhanced Photocatalytic Hydrogen Production
IF 7 1区 化学
Inorganic Chemistry Frontiers Pub Date : 2024-12-02 DOI: 10.1039/d4qi02386b
Fankai Bu, Runzhi Yuan, Zejun Zhang, Jun Wang, Junying Liu, Yang-Chun Yong
{"title":"Viologen Doping Induced Charge Storage of Carbon Nitride for Enhanced Photocatalytic Hydrogen Production","authors":"Fankai Bu, Runzhi Yuan, Zejun Zhang, Jun Wang, Junying Liu, Yang-Chun Yong","doi":"10.1039/d4qi02386b","DOIUrl":"https://doi.org/10.1039/d4qi02386b","url":null,"abstract":"The rapid recombination of photogenerated charges is the primary bottleneck hindering the photocatalytic hydrogen generation with graphitic carbon nitride (g-C3N4). Herein, by introducing methyl viologen (MV) into the carbon nitride framework, CN-MV-x with enhanced photoinduced charge carriers separation is fabricated. The surface chemistry and photoelectrochemical properties of the CN-MV-x samples are greatly enhanced. Due to the increased charge separation with the electron extraction by doped MV, the highest hydrogen evolution rate of 1.65 mmol/g/h is achieved by the CN-MV-x photocatalyst doped with 10 mmol MV (CN-MV-10). More impressively, the CN-MV-10 also shows an extraordinary electron storage ability, which powers the time-delayed hydrogen production in the dark after light illumination. Further analysis indicates that this time-delayed hydrogen evolution ability ascribed to the electron accumulation in the conduction band of carbon nitride. This study provides a new route to improve the photoinduced charge separation by introducing redox species.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"29 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Two Robust Polyoxovanadate Clusters Having a Square-Prism V10Ox Core for Efficient Catalysis of Benzene Hydroxylation to Phenol
IF 7 1区 化学
Inorganic Chemistry Frontiers Pub Date : 2024-12-02 DOI: 10.1039/d4qi02589j
Jilei Wang, Lingxi Xu, Qin Wang, Pinfang Yan, Xinlian Chen, Ting JIn, Hua Mei, Yan Xu
{"title":"Two Robust Polyoxovanadate Clusters Having a Square-Prism V10Ox Core for Efficient Catalysis of Benzene Hydroxylation to Phenol","authors":"Jilei Wang, Lingxi Xu, Qin Wang, Pinfang Yan, Xinlian Chen, Ting JIn, Hua Mei, Yan Xu","doi":"10.1039/d4qi02589j","DOIUrl":"https://doi.org/10.1039/d4qi02589j","url":null,"abstract":"Hydrogen peroxide (H2O2)-mediated oxidation of benzene to phenol in a single step is a promising approach for green phenol production. Nevertheless, it remains a long-sought pursuit to construct robust and efficient heterogeneous catalysts with atomic precision. Here we present the synthesis of two robust V10 oxo clusters holding different capping ligands: named V10-BTA, and V10-CBTA. Single crystal analysis reveals two decavanadate clusters exhibit a distinct braced square-prism configuration with different benzotriazole ligands capping on the edges of the square-prism, and V10-BTA is an example of rare highly reduced vanadium cluster. Accordingly, functionalization of the V10 square-prism with organic linkers both provides enhanced structural stability and introduces porosity to the cluster assembly in terms of heterogeneous application, thus allowing more active sites to be accessible and elevating reactivity. Remarkably, V10-BTA exhibits outstanding catalytic performance in the one-pot hydroxylation reaction, obtaining benzene to phenol conversion of 32.2% with a phenol selectivity of 99%, arising from the synergistic interplay between the braced square-prism configuration and the active V sites as confirmed by control experiments. Besides, V10-BTA displays broad substrate compatibility and superior recyclability for six successive cycles. This study provides an imperative strategy to develop POV clusters with excellent stability, while contributes to high catalytic efficiency for some challenging chemical transformations.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"199 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Unveiling the Role of Surface Iodine Vacancies in CsPbI3 Perovskite: Carrier Recombination Dynamics and Defect Passivation Mechanisms
IF 7 1区 化学
Inorganic Chemistry Frontiers Pub Date : 2024-12-02 DOI: 10.1039/d4qi02533d
Jing Wang, Xiangmei Duan
{"title":"Unveiling the Role of Surface Iodine Vacancies in CsPbI3 Perovskite: Carrier Recombination Dynamics and Defect Passivation Mechanisms","authors":"Jing Wang, Xiangmei Duan","doi":"10.1039/d4qi02533d","DOIUrl":"https://doi.org/10.1039/d4qi02533d","url":null,"abstract":"Lead-iodine perovskites are emerged as promising candidates for next-generation solar cells, yet a divergence persists between the theoretical and experimental realms regarding the impact of surface defect iodine vacancy (VI) on device performance. To elevate cell efficiency, a profound understanding and delicate control of VI and their passivation mechanisms are crucial. In this work, we study various VI defects near the surface of all inorganic CsPbI3 perovskite using ab initio non-adiabatic molecular dynamics. The results show that the electron-hole (e-h) recombination lifetime highly depend on the defect positions and configurations, as well as the efficacy of Lewis base additives in passivating defects. Despite the outermost layer VI creates no defect state within the band gap, the carrier recombination rate accelerates significantly by a factor of 2 compared to defect-free surface, owing to strong electron-phonon coupling. Subsurface defects create localized hole trapping state, enabling the swift capture of valence band holes, which subsequently accelerate recombination with the conduction band electrons by a factor of 6.5. Remarkably for Pb-dimer, this rate escalates 13-fold. Incorporating Lewis base molecule HCOO¯ forms the stable Pb-O bonds with lead ions, preventing the surface VI reconstruction (iodine migration), Pb-dimer formation, and in-band defect state. These effectively reduce the electron-phonon coupling, achieving performance comparable to defect-free surface. This work reconciles contradictory of surface VI on perovskite performance, and enriches our understanding of surface defect properties and their effects on carrier dynamics and device efficiency.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"25 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","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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