期刊
NANOMATERIALS
卷 7, 期 5, 页码 -出版社
MDPI AG
DOI: 10.3390/nano7050103
关键词
rhodium nanowires; electrodeposition; citrate; HER; defect
类别
资金
- Zhejiang Provincial Natural Science Foundation of China [LY17B010003, LY15B050005]
- Zhejiang Province Public Technology Research and Social Development Projects [2014C33006]
- National Research Foundation of Korea (National Leading Research Lab) [NRF-2011-0027911]
This work reports on the electrodeposition of rhodium (Rh) nanowires with a controlled surface morphology synthesized using an anodic aluminum oxide (AAO) template. Vertically aligned Rh nanowires with a smooth and coarse morphology were successfully deposited by adjusting the electrode potential and the concentration of precursor ions and by involving a complexing reagent in the electrolyte solution. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses were used to follow the morphological evolution of Rh nanowires. As a heterogeneous electrocatalyst for hydrogen evolution reactions (HER), the coarse Rh nanowire array exhibited an enhanced catalytic performance respect to smooth ones due to the larger surface area to mass ratio and the higher density of catalytically active defects, as evidenced by voltammetric measurements and TEM. Results suggest that the morphology of metallic nanomaterials could be readily engineered by electrodeposition. The controlled electrodeposition offers great potential for the development of an effective synthesis tool for heterogeneous catalysts with a superior performance for wide applications.
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