Wu Weixing, Xu Liangpang, Lu Qian, Sun Jiping, Xu Zhanyou, Song Chunshan, Yu Jimmy C, Wang Ying
Department of Chemistry, The Chinese University of Hong Kong, Hong Kong S. A. R., China.
Adv Mater. 2025 Jan;37(2):e2312894. doi: 10.1002/adma.202312894. Epub 2024 May 17.
Electrochemical CO reduction reaction (CORR) powered by renewable energy provides a promising route to CO conversion and utilization. However, the widely used neutral/alkaline electrolyte consumes a large amount of CO to produce (bi)carbonate byproducts, leading to significant challenges at the device level, thereby impeding the further deployment of this reaction. Conducting CORR in acidic electrolytes offers a promising solution to address the "carbonate issue"; however, it presents inherent difficulties due to the competitive hydrogen evolution reaction, necessitating concerted efforts toward advanced catalyst and electrode designs to achieve high selectivity and activity. This review encompasses recent developments of acidic CORR, from mechanism elucidation to catalyst design and device engineering. This review begins by discussing the mechanistic understanding of the reaction pathway, laying the foundation for catalyst design in acidic CORR. Subsequently, an in-depth analysis of recent advancements in acidic CORR catalysts is provided, highlighting heterogeneous catalysts, surface immobilized molecular catalysts, and catalyst surface enhancement. Furthermore, the progress made in device-level applications is summarized, aiming to develop high-performance acidic CORR systems. Finally, the existing challenges and future directions in the design of acidic CORR catalysts are outlined, emphasizing the need for improved selectivity, activity, stability, and scalability.
由可再生能源驱动的电化学CO还原反应（CORR）为CO的转化和利用提供了一条有前景的途径。然而，广泛使用的中性/碱性电解质会消耗大量的CO来生成（双）碳酸盐副产物，这在器件层面带来了重大挑战，从而阻碍了该反应的进一步应用。在酸性电解质中进行CORR为解决“碳酸盐问题”提供了一个有前景的解决方案；然而，由于竞争性析氢反应，它存在固有的困难，因此需要共同努力进行先进的催化剂和电极设计，以实现高选择性和活性。本综述涵盖了酸性CORR的最新进展，从反应机理的阐明到催化剂设计和器件工程。本综述首先讨论了对反应途径的机理理解，为酸性CORR中的催化剂设计奠定了基础。随后，对酸性CORR催化剂的最新进展进行了深入分析，重点介绍了多相催化剂、表面固定分子催化剂和催化剂表面增强。此外，总结了在器件层面应用方面取得的进展，旨在开发高性能的酸性CORR系统。最后，概述了酸性CORR催化剂设计中存在的挑战和未来方向，强调了提高选择性、活性、稳定性和可扩展性的必要性。
