过电位
析氧
纳米片
材料科学
电流密度
分解水
催化作用
纳米技术
化学工程
异质结
电化学
电极
光电子学
化学
光催化
物理化学
生物化学
量子力学
物理
工程类
作者
Deshuang Yu,Yixin Hao,Silin Han,Sheng Zhao,Qing Zhou,Chun‐Han Kuo,Feng Hu,Linlin Li,Han‐Yi Chen,Jianwei Ren,Shengjie Peng
出处
期刊:ACS Nano
[American Chemical Society]
日期:2023-01-09
卷期号:17 (2): 1701-1712
被引量:58
标识
DOI:10.1021/acsnano.2c11939
摘要
The scalable production of inexpensive, efficient, and robust catalysts for oxygen evolution reaction (OER) that can deliver high current densities at low potentials is critical for the industrial implementation of water splitting technology. Herein, a series of metal oxides coupled with Fe2O3 are in situ grown on iron foam massively via an ultrafast combustion approach for a few seconds. Benefiting from the three-dimensional nanosheet array framework and the heterojunction structure, the self-supporting electrodes with abundant active centers can regulate mass transport and electronic structure for prompting OER activity at high current density. The optimized Ni(OH)2/Fe2O3 with robust structure can deliver a high current density of 1000 mA cm–2 at the overpotential as low as 271 mV in 1.0 M KOH for up to 1500 h. Theoretical calculation demonstrates that the strong electronic modulation plays a crucial part in the hybrid by optimizing the adsorption energy of the intermediate, thereby enhancing the efficiency of oxygen evolution. This work proposes a method to construct cheap and robust catalysts for practical application in energy conversion and storage.
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