过电位
双金属片
材料科学
析氧
电化学
金属
电解水
分解水
硫化物
电解
化学工程
密度泛函理论
镍
无机化学
电极
冶金
电解质
化学
催化作用
光催化
物理化学
工程类
有机化学
计算化学
作者
Yaning Fan,Junjun Zhang,Junbo Han,Mengyuan Zhang,Weiwei Bao,Hui Suo,Nailiang Wang,Pengfei Zhang,Zheng‐Hong Luo
出处
期刊:Materials horizons
[The Royal Society of Chemistry]
日期:2024-01-01
卷期号:11 (7): 1797-1807
被引量:1
摘要
The advancement of economically efficient electrocatalysts for alkaline water oxidation based on transition metals is essential for hydrogen production through water electrolysis. In this investigation, a straightforward one-step solvent method was utilized to spontaneously cultivate bimetallic sulfide S-FeCo1 : 1/NIF on the surface of a nickel-iron foam (NIF). Capitalizing on the synergistic impact between the bimetallic constituents and the highly active species formed through electrochemical restructuring, S-FeCo1 : 1/NIF exhibited remarkable oxygen evolution reaction (OER) performance, requiring only a 310 mV overpotential based on 500 mA cm-2 current density. Furthermore, it exhibited stable operation at 200 mA cm-2 for 275 h. Simultaneously, the catalyst demonstrated excellent hydrogen evolution reaction (HER) and overall water-splitting capabilities. It only requires an overpotential of 191 mV and a potential of 1.81 V to drive current densities of 100 and 50 mA cm-2. Density functional theory (DFT) calculations were also employed to validate the impact of the bimetallic synergistic effect on the catalytic activity of sulfides. The results indicate that the coupling between bimetallic components effectively reduces the energy barrier required for the rate-determining step in water oxidation, enhancing the stability and activity of bimetallic sulfides. The exploration of bimetallic coupling to improve the OER performance holds theoretical significance in the rational design of advanced electrocatalysts.
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