Spontaneous weaving: 3D porous PtCu networks with ultrathin jagged nanowires for highly efficient oxygen reduction reaction

被引：72

作者：

Ying, Jie ^{[1
]}

Jiang, Gaopeng ^{[1
]}

Cano, Zachary P. ^{[1
]}

Ma, Zhong ^{[1
]}

Chen, Zhongwei ^{[1
]}

机构：

[1] Univ Waterloo, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2018年 / 236卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

3D porous materials; Pt-based alloys; Morphological evolution; Nanostructures; Oxygen reduction reaction; ELECTROCATALYTIC ACTIVITY; BIMETALLIC NANODENDRITES; PLATINUM NANOWIRES; NANOPOROUS METALS; FUEL-CELLS; NANOPARTICLES; PERFORMANCE; AEROGELS; PD; NANOCRYSTALS;

D O I：

10.1016/j.apcatb.2018.04.035

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：

We report a simple and efficient surfactant-free method to prepare 3D porous PtCu networks with ultrathin jagged nanowires and controllable composition. The morphological evolution and the influential effects of the important experimental parameters on the PtCu networks have been systematically studied. Relative to commercial Pt/C and Pt black catalysts, these porous PtCu networks exhibit much better activity and remarkably improved durability towards the oxygen reduction reaction (ORR). The excellent ORR performance could be attributed to their structural features, including the core-shell nanostructures with a Pt-skin, the 3D porous networks with high surface area, and the ultrathin (3.6 nm) jagged nanowires with plentiful edge/corner atoms. Notably, this method can be facilely extended to obtain PtCuAu trimetallic nanowire networks with high porosity, which exhibits its robustness for preparing novel 3D porous nanostructures with great potential in various catalytic applications.

引用

页码：359 / 367

页数：9

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