过电位
电催化剂
催化作用
材料科学
电子转移
合金
化学工程
电解水
密度泛函理论
电解
分解水
氢
吸附
碱性水电解
纳米技术
纳米颗粒
化学
光化学
电极
复合材料
物理化学
电化学
光催化
计算化学
有机化学
电解质
工程类
作者
Xuan Li,Siyang Zhang,Jiashun Liang,Shenzhou Li,Hao Shi,Jinjia Liu,Tanyuan Wang,Jiantao Han,Qing Li
出处
期刊:Small
[Wiley]
日期:2022-07-15
卷期号:18 (32)
被引量:9
标识
DOI:10.1002/smll.202202496
摘要
Abstract The development of highly efficient and durable water electrolysis catalysts plays an important role in the large‐scale applications of hydrogen energy. In this work, protrusion‐rich Cu@NiRu core@shell nanotubes are prepared by a facile wet chemistry method and used for catalyzing hydrogen evolution reaction (HER) in an alkaline environment. The protrusion‐like RuNi alloy shells with accessible channels and abundant defects possess a large surface area and can optimize the surface electronic structure through the electron transfer from Ni to Ru. Moreover, the unique 1D hollow structure can effectively stabilize RuNi alloy shell through preventing the aggregation of nanoparticles. The synthesized catalyst can achieve a current density of 10 mA cm −2 in 1.0 m KOH with an overpotential of only 22 mV and show excellent stability after 5000 cycles, which is superior to most reported Ru‐based catalysts. Density functional theory calculations illustrate that the weakened hydrogen adsorption on Ru sites induced by the alloying with Ni and active electron transfer between Ru and Ni/Cu are the keys to the much improved HER activity.
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