文献类型：期刊文献

英文题名：Heterogeneous Cr-doped Co3S4/NiMoS4 bifunctional electrocatalyst for efficient overall water splitting

作者：Li, Yiwen[1];Zhu, Zhengju[1];Zhong, Yu Lin[2];Jin, Yifan[1];Saha, Petr[3];Cheng, Qiling[1,3]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[2]Griffith Univ, Queensland Micro & Nanotechnol Ctr, Sch Environm & Sci, Nathan, Qld 4111, Australia;[3]Tomas Bata Univ Zlin, Sino EU Joint Lab New Energy Mat & Devices, Nam T G Masaryka 5555, Zlin 76001, Czech Republic

年份：2024

卷号：614

外文期刊名：JOURNAL OF POWER SOURCES

收录：;EI(收录号：20242716599042);WOS:【SCI-EXPANDED(收录号:WOS:001282669100001)】；

基金：This work was supported by the National Natural Science Foundation of China (22108079) , Shanghai Pujiang Program (21PJD018) and China Postdoctoral Science Foundation (2020M681208) .

语种：英文

外文关键词：Metal sulfides; Heterostructures; Nanostructures; Metal doping; Electrocatalytic water splitting

摘要：Exploration of efficient and robust catalysts for electrocatalytic water splitting is paramount yet challenging for economical hydrogen production. Here, nanoforest-like heterostructures composed of inner NiMoS4 nanowires and outer Cr-doped Co3S4 nanosheets were grown on nickel foams (Cr-Co3S4/NiMoS4) as highly efficient bifunctional electrocatalysts. As a result, Cr-Co3S4/NiMoS4 heterostructures exhibit low overpotentials of 72 mV and 243 mV for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) at 10 mA cm(-2), respectively. Moreover, the water electrolyzer assembled by Cr-Co3S4/NiMoS4 as bifunctional electrodes reaches 10 mA cm(-2) at 1.587 V and maintains exceptional stability over 200 h. The experimental and theoretical characterizations collectively unveil that the charge redistribution occurs at the heterointerface between Crdoped Co3S4 and NiMoS4, resulting in the regulation of both their electronic structures, which optimizes the adsorption of HER intermediates and decreases the energy barrier of determining step for OER. Additionally, the Cr doping and nanoforest-like morphology increase the intrinsic conductivity and the exposure of active sites, collectively improving the water electrolysis efficiency. This finding presents a promising way to construct and adjust the heterojunction engineering for bifunctional electrocatalysts toward water electrolysis.