氧气
氢键
化学
氢
析氧
有机化学
分子
物理化学
电极
电化学
作者
Shicheng Zhu,Ruoou Yang,Huangjingwei Li,Sirui Huang,Haozhi Wang,Youwen Liu,Huiqiao Li,Tianrui Zhai
标识
DOI:10.1002/anie.202319462
摘要
Developing highly active oxygen evolution reaction (OER) catalysts in acidic conditions is a pressing demand for proton‐exchange membrane water electrolysis. Manipulating proton character at the electrified interface, as the crux of all proton‐coupled electrochemical reactions, is highly desirable but elusive. Herein we present a promising protocol, which reconstruct a connected hydrogen‐bond network beween the catalyst‐electrolyte interface by coupling hydrophilic units to boost acidic OER activity. Modelling on N‐doped‐carbon‐layer clothed Mn‐doped‐Co3O4 (Mn‐Co3O4@CN), we unravel that the hydrogen‐bond interaction between CN units and H2O molecule not only drags the free water to enrich the surface of Mn‐Co3O4 but also serves as a channel to promote the dehydrogenation process. Meanwhile, the modulated local charge of the Co sites from CN units/Mn dopant lowers the OER barrier. Therefore, Mn‐Co3O4@CN surpasses RuO2 at high current density (100 mA cm‐2 @ ~538 mV).
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