Protrusion-Rich Cu@NiRu Core@shell Nanotubes for Efficient Alkaline Hydrogen Evolution Electrocatalysis
发布时间：2022-08-11
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- 论文类型：
- Research Article
- 第一作者：
- Liu,Xuan
- 通讯作者：
- Li,Qing
- 合写作者：
- Han, Jiantao,Wang, Tanyuan,Liu, Jinjia,Shi, Hao,Li, Shenzhou,Liang, Jiashun,Zhang, Siyang
- 发表刊物：
- Small
- 所属单位：
- 华中科技大学
- 刊物所在地：
- 德国
- 文献类型：
- Article
- 卷号：
- 18
- 期号：
- 32
- 页面范围：
- 2202496
- ISSN号：
- 1613-6829
- 关键字：
- Core@Shell Structures; Electrocatalysis; Hydrogen Evolution Reaction; Nanotubes; Ru-based Catalysts
- DOI码：
- 10.1002/smll.202202496
- 发表时间：
- 2022-07-15
- 影响因子：
- 13.0
- 摘要：
- 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.