水电解用单原子催化剂:从涂覆催化剂的底物到涂覆催化剂的膜

EES catalysis Pub Date : 2023-10-05 DOI:10.1039/D3EY00165B
Sol A Lee, Sang Eon Jun, Sun Hwa Park, Ki Chang Kwon, Jong Hun Kang, Min Sang Kwon and Ho Won Jang
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摘要

通过水电解的绿色制氢被认为是能够实现碳中和的工业规模制氢的下一代技术。构建水电解槽的核心是设计膜电极组件(MEA),实现膜、电催化剂和气体扩散层的最佳整合。在两种具有代表性的MEA制造方法中,催化涂覆基板(CCS)和催化涂覆膜(CCM), CCM由于其催化剂层/膜界面接触和可扩展性而显示出很大的发展前景。CCM方法的关键是粉末催化剂在膜上的有效应用。在这方面,单原子催化剂(SACs)由于其独特的电子/原子构型和高的原子利用效率而具有前所未有的催化活性而成为一个值得关注的焦点。将SACs集成到CCM-MEA中有可能成为一种尖端的水电解技术。然而,由于在SACs - ccm - mea制造和细胞操作过程中组件(SACs、膜、离聚体、支架)的不稳定性和降解,它仍处于起步阶段。在此,我们概述了MEA的代表性制作方法,并对适用于MEA的sac进行了全面分析。然后,我们讨论了SACs-CCM-MEA的优势和工业制氢面临的挑战。最后,对单原子催化包覆膜的研究进展进行了展望。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Single atom catalysts for water electrolysis: from catalyst-coated substrate to catalyst-coated membrane

Green hydrogen production through water electrolysis is considered the next-generation technology capable of industrial-scale hydrogen production to achieve carbon neutrality. The core of constructing a water electrolyzer lies in designing the membrane electrode assembly (MEA) with optimal integration of the membrane, electrocatalysts, and gas diffusion layer. Among the two representative MEA fabrication methods, catalyst-coated substrates (CCS) and catalyst-coated membranes (CCM), CCM shows great promise due to its catalyst layer/membrane interface contact and scalability. The key factor in the CCM method is the effective application of the powdered catalyst onto the membrane. In this respect, the utilization of single-atom catalysts (SACs) has emerged as a noteworthy focus due to their unprecedented catalytic activity resulting from unique electronic/atomic configurations and high atomic utilization efficiency. Incorporating SACs into CCM–MEA has the potential to be a cutting-edge water electrolysis technology. However, it is still in its infancy due to the instability of the components (SACs, membranes, ionomers, supports) and degradation during the SACs–CCM–MEA fabrication and cell operation. Herein, we outline the representative fabrication method of MEA and provide a comprehensive analysis of SACs applicable to MEA. Then, we discuss the advantages of SACs–CCM–MEA and the challenges for industrial hydrogen production. Finally, this review concludes with future perspectives on the development of single-atom catalyst-coated membranes and the expected achievements.

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Back cover Correction: High performance acidic water electrooxidation catalysed by manganese–antimony oxides promoted by secondary metals The role of Fe incorporation into Ni-MOF-74 derived oxygen evolution electrocatalysts for anion exchange membrane water electrolysis. Vacancy-engineered bismuth vanadate for photoelectrocatalytic glycerol oxidation with simultaneous hydrogen production† Back cover
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