PtAg bimetallic nanowires: Facile synthesis and their use as excellent electrocatalysts toward low-cost fuel cells

被引：117

作者：

Cao, Xia ^{[1
,2
]}

Wang, Ning ^{[3
]}

Han, Yu ^{[3
]}

Gao, Caizhen ^{[3
]}

Xu, Ying ^{[3
]}

Li, Meixian ^{[1
]}

Shao, Yuanhua ^{[1
]}

机构：

[1] Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China

[2] Capital Med Univ, Sch Biochem & Pharmaceut Sci, Beijing 100069, Peoples R China

[3] Beijing Univ Aeronaut & Astronaut, Sch Chem & Environm, Beijing 100191, Peoples R China

来源：

NANO ENERGY | 2015年 / 12卷

基金：

中国国家自然科学基金;

关键词：

PtAg nanovvire; Solution synthesis; Facet matching; Electrocatalysis; Methanol oxidation; OXYGEN REDUCTION REACTION; CORE-SHELL NANOCATALYSTS; PALLADIUM NANOCUBES; SILVER; CATALYSTS; PLATINUM; ALLOY; CONDUCTIVITY; NANOCRYSTALS; NANOSTRUCTURES;

D O I：

10.1016/j.nanoen.2014.12.020

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Facile chemical synthesis of PtAg nanowires with different compositions through co-reduction of Ag and Pt precursors has been demonstrated. A facet-matching coupled autocatalytic growth mechanism, which favors reducing the exposed surface area while minimizing the interface mismatch energy with the formation of a coherent interface, is supported by SEM, TEM, XRD and EDS characterizations. Interestingly, tunable electrocatalytic activities have also been shown, which can be up to three times higher toward the direct methanol oxidation reaction in acid media for the dealloyed Pt94Ag6 than that of the commercial Pt/C catalyst based on the same mass of Pt. Such an excellent catalytic performance can be ascribed to the synergy effect of enhanced electric conductivity, clean surface, significantly increased caves, as well as the hetero-atomic interactions on the surface of alloyed nanoparticles. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：105 / 114

页数：10

共 54 条

[1]

PtAg nanowires: facile synthesis and their applications as excellent oxygen reduction electrocatalysts for label-free electrochemical immunoassay [J].