用于碱性介质中高效析氢的分级4H/面心立方钌纳米管的合成
Synthesis of Hierarchical 4H/fcc Ru Nanotubes for Highly Efficient Hydrogen Evolution in Alkaline Media.
作者信息
Lu Qipeng, Wang An-Liang, Cheng Hongfei, Gong Yue, Yun Qinbai, Yang Nailiang, Li Bing, Chen Bo, Zhang Qinghua, Zong Yun, Gu Lin, Zhang Hua
机构信息
Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.
Institute of Physics, Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing, 100190, China.
出版信息
Small. 2018 Jul;14(30):e1801090. doi: 10.1002/smll.201801090. Epub 2018 Jun 28.
Hierarchical metal nanostructures containing 1D nanobuilding blocks have stimulated great interest due to their abundant active sites for catalysis. Herein, hierarchical 4H/face-centered cubic (fcc) Ru nanotubes (NTs) are synthesized by a hard template-mediated method, in which 4H/fcc Au nanowires (NWs) serve as sacrificial templates which are then etched by copper ions (Cu ) in dimethylformamide. The obtained hierarchical 4H/fcc Ru NTs contain ultrathin Ru shells (5-9 atomic layers) and tiny Ru nanorods with length of 4.2 ± 1.1 nm and diameter of 2.2 ± 0.5 nm vertically decorated on the surface of Ru shells. As an electrocatalyst for the hydrogen evolution reaction in alkaline media, the hierarchical 4H/fcc Ru NTs exhibit excellent electrocatalytic performance, which is better than 4H/fcc Au-Ru NWs, commercial Pt/C, Ru/C, and most of the reported electrocatalysts.
由于其丰富的催化活性位点，含有一维纳米结构单元的分级金属纳米结构引起了人们极大的兴趣。在此，通过硬模板介导的方法合成了分级4H/面心立方（fcc）钌纳米管（NTs），其中4H/fcc金纳米线（NWs）作为牺牲模板，然后在二甲基甲酰胺中被铜离子（Cu²⁺）蚀刻。所获得的分级4H/fcc钌纳米管包含超薄的钌壳层（5-9个原子层）以及垂直装饰在钌壳层表面的长度为4.2±1.1 nm、直径为2.2±0.5 nm的微小钌纳米棒。作为碱性介质中析氢反应的电催化剂，分级4H/fcc钌纳米管表现出优异的电催化性能，优于4H/fcc金-钌纳米线、商业铂碳、钌碳以及大多数已报道的电催化剂。
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