Controlled synthesis and synergistic effects of graphene-supported PdAu bimetallic nanoparticles with tunable catalytic properties

Graphene-supported bimetallic nanoparticles are promising nanocatalysts, which can show strong and tunable catalytic activity and selectivity. Herein room-temperature-ionic-liquid-assisted metal sputtering is utilized to synthesize PdAu bimetallic nanoparticles on graphene with bare surface, small s...

Full description

Saved in:
Bibliographic Details
Published in:Nanoscale 2015-04, Vol.7 (14), p.6356-6362
Main Authors: Liu, Chang-Hai, Liu, Rui-Hua, Sun, Qi-Jun, Chang, Jian-Bing, Gao, Xu, Liu, Yang, Lee, Shuit-Tong, Kang, Zhen-Hui, Wang, Sui-Dong
Format: Article
Language:English
Subjects:
Bimetals
Catalysis
Catalysts
Nanoparticles
Nanostructure
Oxidation
Palladium
Reduction
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Graphene-supported bimetallic nanoparticles are promising nanocatalysts, which can show strong and tunable catalytic activity and selectivity. Herein room-temperature-ionic-liquid-assisted metal sputtering is utilized to synthesize PdAu bimetallic nanoparticles on graphene with bare surface, small size, high surface density and controlled Pd-to-Au ratio. This controllable synthetic approach is green-chemistry compatible and totally free of additives and byproducts. The supported PdAu nanoparticles show excellent catalytic capabilities for both oxidation and reduction reactions, strongly dependent on the Pd-to-Au ratio. A strong correlation among catalytic performance, bimetallic composition and charge redistribution in the PdAu nanoparticles has been demonstrated. The results suggest that sufficient Au d-holes appear to be significant to the catalysis of oxidation reaction, and a metallic Pd surface is critical to the catalysis of reduction reaction. By the present method, the bimetallic combination can be tailored for distinct types of catalytic reactions.
ISSN:2040-3364
2040-3372
DOI:10.1039/c4nr06855f