用于增强电催化甲醇氧化的超细铂钌稀合金纳米枝晶

Ultrafine PtRu Dilute Alloy Nanodendrites for Enhanced Electrocatalytic Methanol Oxidation.

作者信息

Zhang Shuping, Rong Hongpan, Yang Tianyi, Bai Bing, Zhang Jiatao

机构信息

Beijing Key Laboratory of Construction-Tailorable Advanced Functional, Materials and Green Applications, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China.

出版信息

Chemistry. 2020 Mar 26;26(18):4025-4031. doi: 10.1002/chem.201904229. Epub 2019 Oct 30.

DOI:10.1002/chem.201904229

PMID:31596524

Abstract

Dilute alloy nanostructures have been demonstrated to possess distinct catalytic properties. Noble-metal-induced reduction is one effective synthesis strategy to construct dilute alloys and modify the catalytic performance of the host metal. Herein, we report the synthesis of ultrafine PtRu dilute alloy nanodendrites (PtRu NDs, molar ratio Ru/Pt is 1:199) by the reduction of Ru ions induced by Pt metal. For the methanol oxidation reaction, PtRu NDs showed the highest forward peak current density (2.66 mA cm , 1.14 A/mg ) and the best stability compared to those of pure-Pt nanodendrites (pure-Pt NDs), commercial PtRu/C and commercial Pt/C catalysts.

摘要

稀合金纳米结构已被证明具有独特的催化性能。贵金属诱导还原是构建稀合金和改变主体金属催化性能的一种有效合成策略。在此，我们报道了通过铂金属诱导钌离子还原合成超细铂钌稀合金纳米枝晶（PtRu NDs，钌/铂摩尔比为1:199）。对于甲醇氧化反应，与纯铂纳米枝晶（pure-Pt NDs）、商业PtRu/C和商业Pt/C催化剂相比，PtRu NDs显示出最高的正向峰值电流密度（2.66 mA cm ，1.14 A/mg ）和最佳的稳定性。