催化作用
纳米线
电催化剂
材料科学
金属
氧化物
酒
化学工程
酒精氧化
纳米技术
电化学
无机化学
化学
物理化学
有机化学
冶金
电极
工程类
作者
Zelin Chen,Yunwei Liu,Chang Liu,Jinfeng Zhang,Yanan Chen,Wenbin Hu,Yida Deng
出处
期刊:Small
[Wiley]
日期:2019-12-23
卷期号:16 (4)
被引量:59
标识
DOI:10.1002/smll.201904964
摘要
Abstract The development of new type electrocatalysts with promising activity and antipoisoning ability is of great importance for electrocatalysis on alcohol oxidation. In this work, Pd nanowire (PdNW)/CuO x heterogeneous catalysts with different types of PdOCu interfaces (Pd/amorphous or crystalline CuO x ) are prepared via a two‐step hydrothermal strategy followed by an air plasma treatment. Their interface‐dependent performance on methanol and ethanol oxidation reaction (MOR and EOR) is clearly observed. The as‐prepared PdNW/crystalline CuO x catalyst with 17.2 at% of Cu on the PdNW surface exhibits better MOR and EOR activity and stability, compared with that of PdNW/amorphous CuO x and pristine PdNW catalysts. Significantly, both the cycling tests and the chronoamperometric measurements reveal that the PdNW/crystalline CuO x catalyst yields excellent tolerance toward the possible intermediates including formaldehyde, formic acid, potassium carbonate, and carbon monoxide generated during the MOR process. The detailed analysis of their chemical state reveals that the enhanced activity and antipoison ability of the PdNW/crystalline CuO x catalyst originates from the electron‐deficient Pd δ+ active sites which gradually turn into Pd 5 O 4 species during the MOR catalysis. The Pd 5 O 4 species can likely be stabilized by moderate crystalline CuO x decorated on the surface of PdNW due to the strong PdOCu interaction.
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