X射线吸收精细结构
纳米片
过电位
材料科学
电催化剂
密度泛函理论
金属有机骨架
钴
纳米技术
电子结构
光谱学
化学工程
物理化学
化学
计算化学
电化学
电极
冶金
物理
量子力学
吸附
工程类
作者
Xinyue Li,Dian Luo,Fan Jiang,Kuanjian Zhang,Shaoxia Wang,Shifeng Li,Qingqing Zha,Yu‐Cheng Huang,Yonghong Ni
出处
期刊:Small
[Wiley]
日期:2023-04-03
卷期号:19 (28)
被引量:7
标识
DOI:10.1002/smll.202301850
摘要
Abstract Designing excellent electrocatalysts for the hydrogen evolution reaction (HER) is extremely significant in producing clean and sustainable hydrogen fuel. Herein, a rational strategy is developed to fabricate a promising electrocatalyst by introducing atomically dispersed Ru into a cobalt‐based metal‐organic framework (MOF), Co‐BPDC (Co(bpdc)(H 2 O) 2 , BPDC: 4,4'‐Biphenyldicarboxylic acid). The obtained CoRu‐BPDC nanosheet arrays exhibit remarkable HER performance with an overpotential of 37 mV at a current density of 10 mA cm −2 in alkaline media, which is superior to most of the MOF‐based electrocatalysts and comparable to the commercial Pt/C. Synchrotron radiation‐based X‐ray absorption fine structure (XAFS) spectroscopy studies verify that the isolated Ru atoms are dispersed in Co‐BPDC nanosheets with the formation of five‐coordinated Ru‐O 5 species. XAFS spectroscopy combined with density functional theory (DFT) calculations unravels that atomically dispersed Ru can modulate the electronic structure of the as‐obtained Co‐BPDC, contributing to the optimization of binding strength for H* and the enhancement of HER performance. This work opens a new avenue to rationally design highly‐active single‐atom modified MOF‐based HER electrocatalysts via modulating electronic structures of MOF.
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