Platinum-Cobalt Bimetallic Nanoparticles with Pt Skin for Electro-Oxidation of Ethanol

被引：92
|
作者：
Zhang, Bin-Wei [1 ,2 ]
Sheng, Tian [1 ]
Wang, Yun-Xiao [2 ]
Qu, Xi-Ming [1 ]
Zhang, Jun-Ming [1 ]
Zhang, Zong-Cheng [1 ]
Liao, Hong-Gang [1 ]
Zhu, Fu-Chun [1 ]
Dou, Shi-Xue [2 ]
Jiang, Yan-Xia [1 ]
Sun, Shi-Gang [1 ]
机构：
[1] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China
[2] Univ Wollongong, Australian Inst Innovat Mat, Inst Superconducting & Elect Mat, Innovat Campus,Squires Way, North Wollongong, NSW 2500, Australia
来源：
ACS CATALYSIS | 2017年 / 7卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Pt-skin; Pt3Co bimetallic; ethanol electro-oxidation; in situ FTIRS; DFT; OXYGEN REDUCTION REACTION; ELECTROCATALYTIC ACTIVITY; PT-SKIN; CATALYSTS; SURFACE; NANOCRYSTALS; ADSORPTION; CONVERSION; CARBON; CO2;
D O I：
10.1021/acscatal.6b03021
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In order to maximize the Pt utilization in catalysts and improve catalytic processes, we report a convenient strategy for preparation of Pt3Co with Pt-skin structured bimetallic nanocatalysts directly supported on porous graphitic carbon. Notably, the thickness of the Pt skin is only 1-2 atomic layers, about 0.5 nm. Surprisingly, the bimetallic nanocatalysts composed of Pt3Co with Pt-skin are first used as ethanol electro-catalysts, with the mass activity of 0.79 mA mu gPt(-1), which is a 250% enhancement compared with commercial Pt/C (0.32 mA mu Pt-1). On the basis of the results of electrochemical in situ Fourier transform infrared spectroscopy (FTIRS) and density functional theory (DFT), a new ethanol electro-oxidation enhancement mechanism is proposed in which Pt3Co with Pt-skin promotes partial oxidation of ethanol over C-C bond cleavage, thereby resulting in higher CH3COOH production than CO2 production.
引用
收藏
页码：892 / 895
页数：4
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