双金属片
电催化剂
催化作用
材料科学
化学工程
吉布斯自由能
多孔性
制氢
氢
氢燃料
吸附
金属
无机化学
纳米技术
物理化学
化学
电极
冶金
复合材料
电化学
有机化学
热力学
工程类
物理
作者
Qingqing Pan,Chunyan Xu,Xiao Li,Jianfu Zhang,Xiao‐Li Hu,Yun Geng,Zhong‐Min Su
标识
DOI:10.1016/j.cej.2020.126962
摘要
Hydrogen generated by water splitting devices is a promising way to solve energy issues, which is limited by Pt-based precious catalysts. Developing efficient Pt-free electrocatalyst for hydrogen evolution reaction (HER) is highly essential for the practical applications. Herein, we report a soft-template method to fabricate an efficient porous bimetallic hybrid material, dubbed Ni/Mo6Ni6[email protected] Benefiting from the bimetallic feature and porous structure, Ni/Mo6Ni6[email protected] exhibits low overpotentials of 101 and 122 mV at 10 mA cm−2 with robust stability in alkaline and acidic media, respectively. Theoretical calculations demonstrate that the C sites of the Mo6Ni6C possess the most excellent electrocatalytic activity due to its Gibbs free energy of hydrogen adsorption closer to 0 eV. Moreover, the superior stability, metallic character and mechanical property are characterized by first-principles calculations, which are advantageous for the Mo6Ni6C to be the HER catalyst. This study supplies a concise strategy to prepare the highly efficient bimetallic electrocatalyst for HER.
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