CoOOH Nanosheets with High Mass Activity for Water Oxidation
作者： Junheng Huang , Junting Chen , Tao Yao , Jingfu He , Shan Jiang
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摘要: Endowing transition-metal oxide electrocatalysts with high water oxidation activity is greatly desired for production of clean and sustainable chemical fuels. Here, we present an atomically thin cobalt oxyhydroxide (γ-CoOOH) nanosheet as efficient electrocatalyst oxidation. The 1.4 nm thick γ-CoOOH can effectively oxidize extraordinarily large mass activities 66.6 A g−1, 20 times higher than that bulk 2.4 the benchmarking IrO2 electrocatalyst. Experimental characterizations first-principles calculations provide solid evidence to half-metallic nature as-prepared nanosheets local structure distortion surface CoO6−x octahedron. This enhances electrophilicity H2O facilitates interfacial electron transfer between Co ions adsorbed -OOH species form O2, resulting in electrocatalytic layered CoOOH
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