Chen Runyu, Meng Linxing, Xu Weiwei, Li Liang
School of Physical Science and Technology, Jiangsu Key Laboratory of Thin Films, Center for Energy Conversion Materials & Physics (CECMP), Soochow University, Suzhou, 215006, P. R. China.
Small. 2024 Jan;20(1):e2304807. doi: 10.1002/smll.202304807. Epub 2023 Aug 31.
Sluggish oxygen evolution reactions on photoanode surfaces severely limit the application of photoelectrochemical (PEC) water splitting. The loading of cocatalysts on photoanodes has been recognized as the simplest and most efficient optimization scheme, which can reduce the surface barrier, provide more active sites, and accelerate the surface catalytic reaction kinetics. Nevertheless, the introduction of cocatalysts inevitably generates interfaces between photoanodes and oxygen evolution cocatalysts (Ph/OEC), which causes severe interfacial recombination and hinders the carrier transfer. Recently, many researchers have focused on cocatalyst engineering, while few have investigated the effect of the Ph/OEC interface. Hence, to maximize the advantages of cocatalysts, interfacial problems for designing efficient cocatalysts are systematically introduced. In this review, the interrelationship between the Ph/OEC and PEC performance is classified and some methods for characterizing Ph/OEC interfaces are investigated. Additionally, common interfacial optimization strategies are summarized. This review details cocatalyst-design-based interfacial problems, provides ideas for designing efficient cocatalysts, and offers references for solving interfacial problems.
光阳极表面上缓慢的析氧反应严重限制了光电化学（PEC）水分解的应用。在光阳极上负载助催化剂已被认为是最简单且最有效的优化方案，它可以降低表面势垒，提供更多活性位点，并加速表面催化反应动力学。然而，助催化剂的引入不可避免地会在光阳极与析氧助催化剂（Ph/OEC）之间产生界面，这会导致严重的界面复合并阻碍载流子转移。最近，许多研究人员专注于助催化剂工程，而很少有人研究Ph/OEC界面的影响。因此，为了最大限度地发挥助催化剂的优势，系统地介绍了设计高效助催化剂时的界面问题。在这篇综述中，对Ph/OEC与PEC性能之间的相互关系进行了分类，并研究了一些表征Ph/OEC界面的方法。此外，总结了常见的界面优化策略。这篇综述详细阐述了基于助催化剂设计的界面问题，为设计高效助催化剂提供了思路，并为解决界面问题提供了参考。
