Preparation and characterization of bimetallic Pt^Ni-P/CNT catalysts via galvanic displacement reaction on electrolessly-plated Ni-P/CNT

• 作者: Ikwhang Chang Jianhuang Zeng Jili Song Yangcheng Jiang Zhen Liu
• 来源期刊: 绿色能源与环境：英文版
• 学科: 化学
• 关键词: Catalysts Pt^Ni-P/CNT Methanol oxidation ELECTROLESS plating Hydrogen evolution REACTION
• 年，卷（期）: lsnyyhjywb_2018,（4）
• 页码范围: 360-367
• 页数: 8页
• 分类号: O643.36

摘要

Platinum-based bimetallic catalysts have broad applications in polymer electrolyte membrane fuel cells and water splitting. In this work,galvanic displacement reaction was employed to prepare Pt^Ni-P/CNT catalysts using electrolessly-plated Ni-P/CNT. These catalysts were extensively characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. Catalytic activities towards methanol oxidation and hydrogen evolution reactions were evaluated and benchmarked with a commercial Pt/C catalyst. Uniform dispersion of Pt on Ni-P particles led to high Pt utilization, and the electrochemical surface area of Pt^Ni-P/CNT with 12.1% Pt loading was found to be 126 m2 gà1, higher than that of a commercial Pt/C(77.9 m2 gà1). The Tafel slopes for the Pt^Ni-P/CNT catalysts were also found to be smaller than that of Pt/C indicating faster kinetics for hydrogen evolution reaction.