Manna Sudipa, Satpati Ashis Kumar, Patra Chandra Nath, Tyagi Avesh Kumar
Analytical Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India.
Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India.
ACS Omega. 2024 Jan 31;9(6):6128-6146. doi: 10.1021/acsomega.3c07867. eCollection 2024 Feb 13.
Generation of hydrogen is one of the most promising routes to harvest solar energy for its sustainable utilization. Among different routes, the photoelectrochemical (PEC) process to split water using solar light to produce hydrogen is the green method to generate hydrogen. The sluggish kinetics through complicated pathways makes the oxygen evolution reaction the rate limiting step of the overall water splitting process. Therefore, development of an efficient photoanode for the sustainable oxidation of water is most challenging in an efficient overall PEC water splitting process. The low solar to hydrogen conversion efficiency arises from the slow surface kinetics, poor hole diffusion, and fast charge recombination processes. There have been strategies to improve catalytic performances through the removal of such detrimental effects. The generation of engineered surfaces is one of the important strategies recently adopted for the enhancement of the catalytic efficiencies. The present review has been focused on the discussion of engineered surfaces using crystal facet engineering, protective surface layer, passivation using the atomic layer deposition (ALD) technique, and cocatalyst modified surfaces to enhance the catalytic efficiency. Some of the important parameters defining catalyst performance are also discussed at the beginning of the review.
制氢是实现太阳能可持续利用最具前景的途径之一。在不同的制氢途径中，利用太阳光分解水产生氢气的光电化学（PEC）过程是一种绿色制氢方法。通过复杂途径的缓慢动力学使得析氧反应成为整个水分解过程的速率限制步骤。因此，在高效的整体PEC水分解过程中，开发一种用于水可持续氧化的高效光阳极极具挑战性。太阳能到氢能的转换效率低是由于表面动力学缓慢、空穴扩散不良以及电荷复合过程快速所致。已经有通过消除这些不利影响来提高催化性能的策略。构建工程表面是最近为提高催化效率而采用的重要策略之一。本综述重点讨论了利用晶面工程、保护表面层、原子层沉积（ALD）技术钝化以及助催化剂修饰表面来构建工程表面以提高催化效率。在综述开头还讨论了一些定义催化剂性能的重要参数。
