锡
电催化剂
电化学
材料科学
过渡金属
X射线吸收光谱法
氮化物
催化作用
化学工程
金属
无机化学
吸收光谱法
纳米技术
化学
电极
物理化学
冶金
有机化学
物理
工程类
量子力学
图层(电子)
作者
Hansen Mou,Jae-Hun Jeong,Bipin Lamichhane,Shyam Kattel,Zechao Zhuang,Ji Hoon Lee,Qiaowan Chang,Jingguang G. Chen
出处
期刊:Chem catalysis
[Elsevier]
日期:2024-02-01
卷期号:4 (2): 100867-100867
被引量:7
标识
DOI:10.1016/j.checat.2023.100867
摘要
Summary
Transition-metal nitrides (TMNs) are a class of electrocatalyst support materials similar to transition-metal carbides (TMCs) with the advantage of avoiding the issues arising from graphitic carbon surface deposits during synthesis. Inspired by previous studies suggesting that TMCs could be used to reduce Pt loading for the hydrogen evolution reaction (HER), this work explored the feasibility of TMN-supported Pt and Au as HER electrocatalysts. This study established a volcano-like trend between electrochemical HER activity and hydrogen-binding energy (HBE) calculated from density functional theory. The Pt/TiN and Au/TiN materials were used to extend knowledge from well-characterized thin films to powder catalysts. In situ X-ray absorption spectroscopy (XAS) measurements provided additional characterization of the Pt/TiN and Au/TiN catalysts under HER conditions. Trends in the electrochemical stability of TMNs were also investigated over a wide range of potentials and pH values, which can be used to guide future studies for TMN-supported electrocatalysts.
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