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Reconstructing Hydrogen-Bond Network for Efficient Acidic Oxygen Evolution
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DOI：10.1002/anie.202319462.png)
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摘要
En 中文
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) @ similar to 538 mV)
Keyword:
hydrogen-bond network
hydrophilic units
local charge
acidic OER
non-noble catalyst
期刊
IF:
16.9
论文数:
5.7W
被引数:
53.0W
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