ACS Applied Energy Materials最新文献

{"title":"Enhanced Anhydrous Proton Conductivity in Azole Phosphonic Acid Mixtures","authors":"Zitan Huang,&nbsp;Michelle L. Lehmann,&nbsp;Amit Bhattacharya,&nbsp;Yifan Liu,&nbsp;Valentino R. Cooper,&nbsp;Raphaële J. Clément,&nbsp;Tomonori Saito,&nbsp;Michael A. Hickner and Ralph H. Colby*,&nbsp;","doi":"10.1021/acsaem.4c0165410.1021/acsaem.4c01654","DOIUrl":"https://doi.org/10.1021/acsaem.4c01654https://doi.org/10.1021/acsaem.4c01654","url":null,"abstract":"<p >Azole molecules are investigated as potential candidates for proton conductors under anhydrous conditions. Since 1,2,3-triazole has the lowest melting point (<i>T</i>_m = 17 °C), it was blended with three phosphonic acid-containing molecules (small molecules with one and two phosphonic acids per molecule and a phosphonic acid polymer) to provide a source of excess protons to enhance the proton conductivity of the blends. We study a wide range of compositions in each system to find that these three mixtures show a maximum proton conductivity at moderate doping compositions, approximately 5–10 azole molecules per phosphonic acid group. Using NMR diffusometry, we show that the protons bonded to nitrogen move faster than the protons bonded to carbons of 1,2,3-triazole, suggesting proton hopping between azole proton carriers. Given the high proton conductivity at 90 °C of the best mixtures, in the range of 20–60 mS/cm, this work provides a path forward for future work in anhydrous proton-conducting polymer membranes. Additionally, Raman spectroscopy was used to accurately determine the molar percentage of protonated 1,2,3-triazole. Combining that with the proton diffusion results, we find that the phosphonic acid polymer shows the most proton hopping at low acid content.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"7 23","pages":"10826–10833 10826–10833"},"PeriodicalIF":5.4,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142843205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two-Step Hydrothermal Synthesis of Ni3(NO3)2(OH)4@MnO2 Heterojunction Supported α-MnO2 Material on Foam Nickel for High-Performance Asymmetric Supercapacitors","authors":"Yingjie Li,&nbsp;Wenqiang Sun,&nbsp;Bin Gao,&nbsp;Yulan Meng,&nbsp;Xiaofeng Wang*,&nbsp;Xue-Zhi Song* and Zhenquan Tan*,&nbsp;","doi":"10.1021/acsaem.4c0216210.1021/acsaem.4c02162","DOIUrl":"https://doi.org/10.1021/acsaem.4c02162https://doi.org/10.1021/acsaem.4c02162","url":null,"abstract":"<p >Enhancing the performance of electrode materials is an effective strategy for increasing the energy density, power density, and lifespan of supercapacitors. In this study, a one-step hydrothermal method is employed to fabricate a large-sized interlaced lamellar structure with Ni₃(NO₃)₂(OH)₄@MnO₂ (NNM-2) heterojunctions loaded onto nickel foam. Then, a uniform layer of α-MnO₂ nanosheets is deposited to create a hierarchical structure of Ni₃(NO₃)₂(OH)₄@MnO₂/α-MnO₂ (NNMM-2) via a subsequent hydrothermal process. The interaction between various components, along with an increased number of active sites, significantly improves the electrochemical performance of the electrode material. Furthermore, the designed core–shell structure helps alleviate volume changes during charge and discharge cycles, thereby improving the stability of the material. Consequently, NNMM-2 demonstrates an impressive specific capacitance of 1261.3 F g^–1 when measured at a current density of 1 A g^–1. When employed as the positive electrode in an asymmetric supercapacitor that features activated carbon as the negative electrode, it demonstrates an energy density of 36.5 W h kg^–1 at a power density of 471.7 W kg^–1. After 7000 charge–discharge cycles, the capacity retention rate remains at 73% with a Coulombic efficiency of 99%, demonstrating excellent stability and capacitance retention capability. This research offers important perspectives on the creation of enhanced electrode materials for energy storage devices with superior performance.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"7 23","pages":"11126–11134 11126–11134"},"PeriodicalIF":5.4,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142850793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rational Design of the 1,4-Diaminobenzene-Functionalized Benzoquinone Cross-Linked Polymer Electrode Material for a High-Performance Flexible Supercapacitor Device","authors":"Sudhir D. Jagadale,&nbsp; and ,&nbsp;Sidhanath V. Bhosale*,&nbsp;","doi":"10.1021/acsaem.4c0193510.1021/acsaem.4c01935","DOIUrl":"https://doi.org/10.1021/acsaem.4c01935https://doi.org/10.1021/acsaem.4c01935","url":null,"abstract":"<p >Redox-active polymers have been investigated for fabricating flexible and wearable electrochemical energy storage (EES) devices. However, the core issues restricting the preparation of conjugated redox polymers in practical supercapacitor (SC) devices are its solubility in electrolyte solvents, poor ion mobility, inferior rate capability, and difficulty in processing. Our main motivation in the present work was to prepare a cross-linked polymer as an alternative to a linear polymer, which is soluble and mechanically unstable, and study its EES properties. Here, we report a molecular-engineered new donor–acceptor–donor cross-linked polymer <b>BAPh-BQ-AC</b> based on 1,4-diaminobenzene (DAPh) and benzoquinone (BQ) that exhibits several accessible redox-active sites for fast faradaic reversible processes. First, the as-fabricated <b>BAPh-BQ-AC/graphite foil (GF)</b> electrode in the three-electrode SC device was investigated. Based on the results of the three-electrode SC, we used <b>BAPh-BQ-AC/(GF)</b> for further charge storage testing in a two-electrode symmetric SC device. <b>BAPh-BQ-AC/(GF)</b> showed impressive pseudocapacitive behavior in both types of SC devices in an aqueous 1 M H₂SO₄ electrolyte solution. Further, a flexible symmetric supercapacitor (FSSC) device was fabricated using the <b>BAPh-BQ-AC/graphite foil (GF)</b> electrode in a poly(vinyl alcohol) (PVA)/H₂SO₄ gel electrolyte. The FSSC cell is mechanically robust at 0 and 180° bending angles. The as-fabricated FSSC devices demonstrate a specific capacitance (<i>C</i>_sp) of 102.39 and 99.59 mF cm^–2 at 0 and 180° bending angles, respectively, at 0.5 mA cm^–2 current density. At 2 mA cm^–2, the FSSC cells exhibit a satisfactory <i>C</i>_sp retention of 75.74% (0°) and 70.98% (180°) of their initial values after 5000 galvanostatic charging–discharging cycles, indicating superb mechanical flexibility. Moreover, at 0.5 mA cm^–2, it exhibits an energy density of 17.90 μW h cm^–2 at 1.76 mW cm^–2 power density. The remarkable electrochemical and mechanical characteristics indicate that this novel <b>BAPh-BQ-AC/(GF)</b> electrode-based FSSC cell configuration is expected to contribute for the design and preparation of promising flexible and wearable electronics.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"7 23","pages":"10982–10997 10982–10997"},"PeriodicalIF":5.4,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142850779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unveiling the Dual Potential of the MoS2@VS2 Nanocomposite as an Efficient Electrocatalyst for Hydrogen and Oxygen Evolution Reactions","authors":"Anju J S,&nbsp;Levna Chacko,&nbsp;Sruthi T,&nbsp;Gopika P,&nbsp;Vincent Mathew and P M Aneesh*,&nbsp;","doi":"10.1021/acsaem.4c0250410.1021/acsaem.4c02504","DOIUrl":"https://doi.org/10.1021/acsaem.4c02504https://doi.org/10.1021/acsaem.4c02504","url":null,"abstract":"<p >Clean and reliable energy sources are essential amidst growing environmental concerns and impending energy shortages. Creating efficient and affordable catalysts for water splitting is a challenging yet viable option for renewable energy storage. Traditional platinum-based catalysts, while highly active, are quite expensive. Our study introduces two-dimensional (2D) MoS₂@VS₂ nanocomposites, developed using hydrothermal technique, as a bifunctional catalyst for the electrolysis of water into valuable products. Structural studies revealed the formation of MoS₂@VS₂ nanocomposites with a nanoflake-like structure, where MoS₂ nanosheets grow on the VS₂ surface. This 2D-based electrocatalyst demonstrated exceptional reaction kinetics, with low overpotentials of 265 mV for the hydrogen evolution reaction (HER) and 300 mV for the oxygen evolution reaction (OER) at 10 mA/cm². Furthermore, the electrocatalyst displayed small Tafel slopes of 65 mV/dec and 103 mV/dec for HER and OER, respectively, along with excellent stability. The unprecedented catalytic activity stems from the synergistic effect between semiconducting MoS₂ and metallic VS₂. Density functional theory calculations confirmed that this synergy enhances the electrical conductivity, facilitating efficient electron transfer during the reaction and providing an abundance of exposed active sites. These results mold MoS₂@VS₂ nanocomposites as promising electrocatalysts for overall water splitting, paving the way for sustainable energy future.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"7 23","pages":"11184–11194 11184–11194"},"PeriodicalIF":5.4,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142842769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spent Zinc–Carbon Battery-Derived Carbon Nanoparticles Coupled with Transition Metal Dichalcogenides for Enhanced pH-Universal Hydrogen Evolution Reaction","authors":"Thi Kim Cuong Phu,&nbsp;Ngan Nguyen Le,&nbsp;Thi Nhan Tran,&nbsp;Thuy Trang T. Vuong,&nbsp;Huu-Doanh Nguyen,&nbsp;Thi Viet Bac Phung,&nbsp;Phuoc-Anh Le* and Phi Long Nguyen*,&nbsp;","doi":"10.1021/acsaem.4c0179110.1021/acsaem.4c01791","DOIUrl":"https://doi.org/10.1021/acsaem.4c01791https://doi.org/10.1021/acsaem.4c01791","url":null,"abstract":"<p >Utilizing highly effective waste-into-value electrocatalysts for the hydrogen evolution reaction (HER) opens a sustainable route to economically beneficial and environmentally friendly hydrogen production. A simple strategy for reusing spent batteries involves enhancing HER performance by preparing electrocatalysts of the carbon anode in spent zinc–carbon batteries and transition metal dichalcogenide (TMDs) materials. In this study, carbon nanoparticles (C_NPs) are incorporated into the basal planes of MoS₂ and WS₂ using a simple ultrasonication method. C_NPs@TMDs (C_NPs@WS₂ and C_NPs@MoS₂) with fewer-layer structures and enhanced exposed active sites show promising catalytic activity for pH-universal HER. In acid, C_NPs@WS₂ and C_NPs@MoS₂ exhibit overpotentials of 0.34 and 0.42 V at 10 mA cm^–2, with Tafel slopes of 0.139 V dec^–1 and 0.145 V dec^–1, respectively. The enhanced HER performance of C_NPs@TMDs originates from their improved electrical conductivity and higher electrochemically active surface area. Alongside experimental results, density function theory (DFT) calculations reveal that incorporating carbon atoms on the TMD surface can efficiently tune the electronic properties of MoS₂ and WS₂ monolayers from semiconductor to semimetal and considerably reduces the hydrogen adsorption Gibbs free energies. These results indicate that highly effective HER catalysts with enhanced catalytic activity in universal pH media are fabricated via an economical and facile method, holding promise for practical applications and paving the way for battery recycling.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"7 23","pages":"10938–10949 10938–10949"},"PeriodicalIF":5.4,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142843292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CdS-Based Interface Engineering for 1.7 V Voltage Vacuum-Deposited Inorganic Perovskite Solar Cells","authors":"Arkadi Akopian,&nbsp;Purnendu Kartikay*,&nbsp;Shadab Soomro,&nbsp;Saba Sharikadze,&nbsp;Ranjith Kottokkaran and Vikram L. Dalal*,&nbsp;","doi":"10.1021/acsaem.4c0219410.1021/acsaem.4c02194","DOIUrl":"https://doi.org/10.1021/acsaem.4c02194https://doi.org/10.1021/acsaem.4c02194","url":null,"abstract":"<p >All-inorganic cesium lead bromide (CsPbBr₃) perovskite solar cells (PSCs) have gained significant attention due to their superior stability compared to that of organic–inorganic hybrid devices. In this study, we employ a vacuum-deposited cadmium sulfide (CdS) interfacial layer to address the challenge of achieving a high open-circuit voltage (<i>V</i>_oc) in vacuum-deposited CsPbBr₃ PSCs. Incorporating a thin layer of CdS between the electron transport layer (ETL) and the inorganic perovskite absorber enhances the <i>V</i>_oc to 1.7 V, along with the power conversion efficiency (PCE) increase from 7.8% to 8.4%. Moreover, adding this interfacial layer improves the charge extraction by potentially reducing grain boundary recombination centers via enlarging perovskite grain sizes. Our results show the average perovskite grain size increases from 4 μm to 6 μm on CdS incorporated samples compared to the control. This work reveals the potential of using CdS as a passivation layer to improve charge extraction characteristics by minimizing bimolecular recombinations.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"7 23","pages":"11086–11093 11086–11093"},"PeriodicalIF":5.4,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142843168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanism of the Layered-to-Spinel Phase Transformation in Li0.5NiO2","authors":"Cem Komurcuoglu,&nbsp;Alan C. West and Alexander Urban*,&nbsp;","doi":"10.1021/acsaem.4c0059110.1021/acsaem.4c00591","DOIUrl":"https://doi.org/10.1021/acsaem.4c00591https://doi.org/10.1021/acsaem.4c00591","url":null,"abstract":"<p >The phase transition of layered Li_0.5NiO₂ to spinel Li(NiO₂)₂ is a potential degradation pathway in LiNiO₂-based lithium-ion battery cathodes. We investigated the mechanism of this phase transformation from first principles. Consistent with experimental observations reported in the literature, our results indicate a high energy barrier for the transformation due to high defect formation energies, a complex charge-transfer mechanism, and electronic frustration. Our results suggest that partially inverse spinel phases are unlikely to form for Li_0.5NiO₂, a qualitative difference from the chemically similar Li_0.5MnO₂, in which the transformation occurs at room temperature. We show that Ni and Li atoms do not migrate gradually to their respective spinel sites for the layered-to-spinel transformation to occur due to high defect formation energies. We investigated the charge ordering in layered phases along the LiNiO₂–NiO₂ composition line, finding a pronounced impact of the symmetry and space group on the layered-to-spinel transition in Li_0.5NiO₂. Finally, we evaluated the relative stability of different spinel space groups, finding that previously reported experimental observations are consistent with a temperature-averaged structure rather than the 0 K ground-state structure of the Li(NiO₂)₂ spinel.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"7 23","pages":"10784–10794 10784–10794"},"PeriodicalIF":5.4,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142850035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Electrolyte Salts on the Electrochemical Performance of Aromatic Polyaroxydiazole Anodes for Pseudocapacitors","authors":"Yan Jiang,&nbsp;Yingying Zhao,&nbsp;Chen Yang,&nbsp;Yuanyuan Yu,&nbsp;Shuheng Liang,&nbsp;Pengqing Liu,&nbsp;Jinrong Wu,&nbsp;Jiadeng Zhu and Mengjin Jiang*,&nbsp;","doi":"10.1021/acsaem.4c0236110.1021/acsaem.4c02361","DOIUrl":"https://doi.org/10.1021/acsaem.4c02361https://doi.org/10.1021/acsaem.4c02361","url":null,"abstract":"<p >Poly(4,4′-biophenylene-1,3,4-oxadiazole) (b-POD) is an n-type conductive polymer (CP) with a high specific capacitance and excellent rate performance. However, its practical application in pseudocapacitors is hindered by severe cycling performance decay. Electrolytes, as crucial components, significantly influence the electrochemical performance of pseudocapacitors. Therefore, selecting an appropriate electrolyte is essential for improving the cycling stability of b-POD, as thoroughly investigated in this study. Larger cations with lower surface charge densities require a smaller driving force for injection into the b-POD electrode, resulting in a more positive doping potential. Particularly, Bu₄N⁺ with a well-delocalized electronic structure forms a weaker interaction force with negatively charged polymer polarons, facilitating its dissociation from the polymer polarons, thereby ensuring good reversibility and excellent cycling stability. In the Bu₄NBF₄ electrolyte, b-POD exhibits a capacitance retention of 93.2% after 10 000 cycles, coupled with a Coulombic efficiency close to 100%. Furthermore, it demonstrates outstanding rate performance, maintaining a specific capacitance of 272 F g^–1 even at 20 A g^–1, which is 87.2% of the specific capacitance tested at 1 A g^–1. Finally, a high-performance asymmetric pseudocapacitor with high energy and power densities has been fabricated. This study aims to offer insights into the design of next-generation POD-derived pseudocapacitors.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"7 23","pages":"11161–11171 11161–11171"},"PeriodicalIF":5.4,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142850036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Conjugated Polymer-Supported Doped Bi2WO6 S-Scheme Heterojunction for Proficient Water Splitting via Dual Regulation of Band Gap Engineering and Improved Charge Separation","authors":"Srabanti Ghosh*,&nbsp;Pradip Sekhar Das,&nbsp;Susmita Bera,&nbsp;Dipendu Sarkar,&nbsp;Kamalesh Roy,&nbsp;Sukhendu Nath,&nbsp;Pritam Ghosh,&nbsp;Chandan Kumar Ghosh and Amarnath Reddy Allu,&nbsp;","doi":"10.1021/acsaem.4c0176610.1021/acsaem.4c01766","DOIUrl":"https://doi.org/10.1021/acsaem.4c01766https://doi.org/10.1021/acsaem.4c01766","url":null,"abstract":"<p >Designing potent photocatalysts for water splitting is one of the foremost challenges in operative solar energy harvesting, and particularly, exploring Bi₂WO₆-based photocatalysts remains unresolved due to its intrinsic drawbacks of fast charge recombination, poor conductivity, and inadequate catalytic efficiency. Herein, we present a strategy to tune the band gap of molybdenum-doped Bi₂WO₆ (Mo-Bi₂WO₆) by an amalgamation of conducting polymer nanofibers for efficient hydrogen generation via photocatalytic water splitting. The heterostructures mimic natural photosynthetic systems via S-scheme charge transfer, utilizing the conducting polymer component to harvest photons for reduction reaction and the transition metal part to hasten catalytic activities by facile charge transfer, which drastically lowers the transport resistance, as reflected in impedance spectra. The optimal content of 2 wt % Mo-BiWO₆ as a cocatalyst in the heterostructures reaches a remarkable H₂ production rate of 131 mmol g^–1 h^–1 with an 18% higher apparent quantum efficiency than pure PPy. Moreover, the heterostructure displays 200- fold higher photocurrent density with fortuitous photostability. The presence of PPy efficiently suppresses charge recombination of Mo-Bi₂WO₆ and improves interfacial charge transfer at the heterostructure. The dominant factor for higher photocatalytic activity is proposed based on a femtosecond transient absorption spectra study supported further by time-resolved photoluminescence spectra and valence band X-ray photoelectron spectroscopy. This work provides a facile approach to developing high-performance, noble-metal-free visible light-driven photocatalysts for efficient solar-fuel production.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"7 23","pages":"10906–10920 10906–10920"},"PeriodicalIF":5.4,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142843212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermochemical Formation of Sodium Borohydride from Sodium Tetramethoxyborate","authors":"Ainee Ibrahim,&nbsp;Mark Paskevicius*,&nbsp;Aneeka Patel,&nbsp;Anita M. D’Angelo,&nbsp;Terry D. Humphries and Craig E. Buckley,&nbsp;","doi":"10.1021/acsaem.4c0251410.1021/acsaem.4c02514","DOIUrl":"https://doi.org/10.1021/acsaem.4c02514https://doi.org/10.1021/acsaem.4c02514","url":null,"abstract":"<p >Sodium borohydride (NaBH₄) can be used as a hydrogen export material, but thermochemical regeneration from NaBO₂ is considered too costly to be feasible mainly due to the cost associated with recycling the metal hydride reagents. This study explores an alternative regeneration route of NaBH₄ using NaB(OCH₃)₄ instead of the widely studied NaBO₂. <i>In situ</i> synchrotron X-ray diffraction (SXRD) was utilized to detect the formation of NaBH₄ from NaB(OCH₃)₄ or NaBO₂ using various metal hydride reducing agents (NaH, MgH₂, Mg₂FeH₆, LiAlH₄, NaAlH₄, CaNi₅H_<i>x</i>, and LaNi₅H_<i>x</i>). NaBH₄ formation was detected using NaB(OCH₃)₄ with NaH (265–320 °C), MgH₂ (310–440 °C), NaAlH₄ (&gt;140 °C), and LiAlH₄ (&gt;20 °C). In contrast, regeneration from NaBO₂ required higher temperatures, with NaBH₄ formation using MgH₂ (&gt;430 °C), Mg₂FeH₆ (&gt;460 °C), NaAlH₄ (&gt;140 °C), and LiAlH₄ (&gt;110 °C). Notably, the reaction between NaB(OCH₃)₄ and NaH yields NaOCH₃, whereas the reaction between NaB(OCH₃)₄ and MgH₂ yields Mg(OCH₃)₂, which may offer lower energy recycling of the metal hydrides. This study also underscores the critical role of hydridic hydrogen (H^–) in solid-state thermochemical reactions for NaBH₄ formation and presents an alternative regeneration route using NaB(OCH₃)₄ that could offer cost and energy savings.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"7 23","pages":"11206–11217 11206–11217"},"PeriodicalIF":5.4,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142843198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}