Composition-controlled Synthesis of PtCuNPs Shells on Copper Nanowires as Electrocatalysts

被引：10

作者：

Cheng, Daojian ^{[1
]}

Wu, Dengfeng ^{[1
]}

Xu, Haoxiang ^{[1
]}

Fisher, Adrian ^{[1
]}

机构：

[1] Beijing Univ Chem Technol, Int Res Ctr Soft Matter, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China

来源：

CHEMISTRYSELECT | 2016年 / 1卷 / 15期

基金：

中国国家自然科学基金;

关键词：

copper nanowires; electrochemistry; formic acid; oxidation; PtCuNPs-shells; surface composition; OXYGEN REDUCTION REACTION; ACID FUEL-CELLS; PLATINUM; CORE; NANOPARTICLES; NANOTUBES; OXIDATION; CATALYSTS; CU; PERFORMANCE;

D O I：

10.1002/slct.201600562

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

PtCuNPs-shells with adjustable composition on copper nanowires (CuNWs) are synthesized in an organic solvent. Transmission electron microscopy, X-ray diffraction, energy dispersive spectroscopy, and X-ray photoelectron spectroscopy (XPS) measurement techniques are used to analyze the structure and surface composition of the as- prepared PtCuNPs-coated CuNWs (PtCu/CuNWs). The XPS results verify that the incorporation of Cu in the PtCuNPs-shells modified electronic state of Pt, which could further tune the formic acid oxidation (FAO) activity. Electrochemical measurements show that their FAO activities are strongly dependent on the PtCuNPs-shells composition. Our results show that PtCu/CuNWs with atom Pt: Cu ratio of 2: 15 (PtCu/CuNWs-(2: 15)) have the optimal shell composition and show the best FAO performance, with a specific activity of 0.92 mA cm(Pt)(-2) and a mass activity of 0.54 A mg(pt-1) at 0.5 V (vs. RHE), which are 6.6- and 6.0- fold enhancements over those of the commercial Pt/C (0.14 mA cmPt(-2) and 0.09 A mg(pt)(-1)) catalyst.

引用

页码：4392 / 4396

页数：5

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