Designing cost‐effective and efficient electrocatalysts plays a pivotal role in advancing the development of electrochemical water splitting for hydrogen generation. Herein, multifunctional active‐center‐transferable heterostructured electrocatalysts, platinum/lithium cobalt oxide (Pt/LiCoO₂) composites with Pt nanoparticles (Pt NPs) anchored on LiCoO₂ nanosheets, are designed towards highly efficient water splitting. In this electrocatalyst system, the active center can be alternatively switched between Pt species and LiCoO₂ for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. Specifically, Pt species are the active centers and LiCoO₂ acts as the co‐catalyst for HER, whereas the active center transfers to LiCoO₂ and Pt turns into the co‐catalyst for OER. The unique architecture of Pt/LiCoO₂ heterostructure provides abundant interfaces with favorable electronic structure and coordination environment towards optimal adsorption behavior of reaction intermediates. The 30 % Pt/LiCoO₂ heterostructured electrocatalyst delivers low overpotentials of 61 and 285 mV to achieve 10 mA cm⁻² for HER and OER in alkaline medium, respectively.

中文翻译：

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多功能活性中心可转移铂/锂钴氧化物异质结构电催化剂，可实现优异的水分解性能。

设计具有成本效益的高效电催化剂在推动用于制氢的电化学水分解技术的发展中起着关键作用。在这里，多功能活性中心可转移异质结构电催化剂，铂/锂钴氧化物（Pt / LiCoO ₂）复合材料与锚定在LiCoO ₂纳米片上的Pt纳米颗粒（Pt NPs），旨在实现高效水分解。在该电催化剂体系中，可以分别在氢生成反应（HER）和氧生成反应（OER）的Pt物种和LiCoO ₂之间切换活性中心。具体而言，Pt物种是活性中心，而LiCoO _2是充当HER的助催化剂，而活性中心转移到LiCoO _2，而Pt变成OER的助催化剂。Pt / LiCoO ₂异质结构的独特结构为反应中间体的最佳吸附行为提供了丰富的界面，良好的电子结构和配位环境。30％Pt / LiCoO ₂异质结构化电催化剂提供61和285 mV的低过电势，分别在碱性介质中实现HER和OER的10 mA cm ^-2。