催化作用
化学
化学工程
分解水
密度泛函理论
解吸
制氢
氢
纳米颗粒
吸附
纳米结构
硫黄
贵金属
纳米技术
材料科学
计算化学
有机化学
工程类
光催化
作者
Dan Yang,Liyun Cao,Jianfeng Huang,Jiao Geng-sheng,Donghua Wang,Qianqian Liu,Guodong Li,Chaozheng He,Liangliang Feng
标识
DOI:10.1016/j.jcis.2023.06.082
摘要
Elaborate and rational design of cost-effective and high-efficiency non-noble metal electrocatalysts for pushing forward the sustainable hydrogen fuel production is of great significance. Herein, a novel VS4 nanoparticle decorated Ni3S2 nanobelt array in-situ grown on nickel foam (VS4/Ni3S2/NF NBs) was prepared by a self-templated synthesis strategy. Benefitting from the unique nanobelt array structure, abundant highly active bridge S22- sites and strong electronic interaction between VS4 and Ni3S2 on the heterointerface, the integrated VS4/Ni3S2/NF NBs exhibited excellent electrocatalytic hydrogen evolution activity and robust stability. The density functional theory (DFT) further revealed the reversible conversion catalysis mechanism of bridging S22- sites in VS4/Ni3S2/NF NBs during HER process. Notably, bidentate bridging SS bonds as the predominant catalytically active centers can spontaneously open once H adsorbed its surface, leading to the aggregation of negative charges on S atoms and thus facilitating the generation of H* intermediates, and spontaneously close when H* desorption is going to form H2. Our work provides fresh insights for developing potential polysulfides as high-performance hydrogen-evolving electrocatalysts for prospective clean energy production from water splitting.
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