催化作用
合金
柯肯德尔效应
非晶态金属
材料科学
结晶
X射线光电子能谱
化学工程
电化学
甲醇
原电池
纳米技术
无定形固体
冶金
结晶学
化学
物理化学
有机化学
电极
工程类
作者
Yige Zhao,Jingjun Liu,Chenguang Liu,Feng Wang,Ye Song
标识
DOI:10.1021/acscatal.6b00540
摘要
Here we propose amorphous CuPt alloy hollow nanotubes as efficient catalysts for the methanol oxidation reaction (MOR) prepared by Na2S2O3-assisted galvanic replacement reaction. The formation mechanism can be explained by the nanoscale Kirkendall-effect-induced hollowing process of the galvanic replacement reaction. The electrochemical tests suggest that the amorphous CuPt alloy exhibits better MOR activity and stability than the crystalline CuPt and commercial Pt/C catalysts, which can be ascribed to the enhanced CO tolerance ability of amorphous alloy. XPS measurements demonstrate that the enhanced anti-CO poison characteristic of amorphous CuPt alloy originates from the strong interaction between Pt and Cu atoms as a result of a unique crystallization state. This research not only provides a facile approach to synthesize amorphous alloy but also opens up an interesting way for amorphous Pt-based alloy to apply to the MOR.
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