The development of high‐performance transition metal−based electrocatalysts for the oxygen evolution reaction (OER) is paramount for electrochemical secondary metal‐air batteries and water splitting. Two‐dimensional (2D) metal‐organic framework (MOF) nanosheets have recently emerged as a novel class of efficient electrocatalysts for OER, due to a high specific surface area, ultrasmall thickness and abundance of active sites. Here, we summarize recent progress in the preparation and characterization of 2D transition metal−based MOFs (e. g. Ni, Co and Cu), as well as their composites and derivatives, including metals/alloys, metal oxides/chalcogenides and metal phosphides/hydroxides, as OER electrocatalysts reported over the past several years. Design principles and preparation routes are presented. The performance of the electrocatalysts is directly compared in terms of overpotential (η) (thermodynamics) and electrocatalytic current density (kinetics), as well as operational stability (economics). Many of these materials exhibit superior catalytic activity compared to the noble metal−based catalysts such as RuO₂ (η<300 mV at 10 mA cm⁻²), and considerable stability with negligible decay with operation over several hours to days. Challenges and perspectives of applying 2D MOFs and their derivatives for OER electrocatalysis are also discussed.

中文翻译：

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二维金属有机骨架及其衍生物的氧析出电催化研究进展

用于氧气析出反应（OER）的高性能过渡金属基电催化剂的开发对于电化学二次金属空气电池和水分解至关重要。二维（2D）金属有机框架（MOF）纳米片由于具有高的比表面积，超小厚度和丰富的活性位点，最近已成为一类新型的高效OER电催化剂。在这里，我们总结了基于2D过渡金属的MOF（例如Ni，Co和Cu）及其复合物和衍生物（包括金属/合金，金属氧化物/硫属化物和金属磷化物/氢氧化物）的制备和表征的最新进展，如OER电催化剂在过去几年中报道的那样。介绍了设计原理和准备路线。直接根据过电势（η）（热力学）和电催化电流密度（动力学）以及操作稳定性（经济性）比较电催化剂的性能。与以贵金属为基础的催化剂（例如RuO）相比，这些材料中的许多材料都具有出色的催化活性。₂（在10 mA cm ^-2时η<300 mV ），并且经过数小时至数天的操作仍具有相当大的稳定性，且衰减可忽略不计。还讨论了将2D MOF及其衍生物用于OER电催化的挑战和前景。