纳米片
电催化剂
氧化物
化学工程
过渡金属
电子转移
材料科学
钴
无机化学
吸附
金属
氧化钴
电化学
催化作用
化学
纳米技术
电极
光化学
物理化学
冶金
工程类
生物化学
作者
Junheng Huang,Junting Chen,Tao Yao,Jingfu He,Shan Jiang,Zhihu Sun,Qinghua Liu,Weiren Cheng,Fengchun Hu,Yong Jiang,Zhiyun Pan,Shiqiang Wei
标识
DOI:10.1002/anie.201502836
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 an efficient electrocatalyst for water oxidation. The 1.4 nm thick γ-CoOOH nanosheet electrocatalyst can effectively oxidize water with extraordinarily large mass activities of 66.6 A g(-1), 20 times higher than that of γ-CoOOH bulk and 2.4 times higher than that of the benchmarking IrO2 electrocatalyst. Experimental characterizations and first-principles calculations provide solid evidence to the half-metallic nature of the as-prepared nanosheets with local structure distortion of the surface CoO(6-x) octahedron. This greatly enhances the electrophilicity of H2O and facilitates the interfacial electron transfer between Co ions and adsorbed -OOH species to form O2, resulting in the high electrocatalytic activity of layered CoOOH for water oxidation.
科研通智能强力驱动
Strongly Powered by AbleSci AI