title: One-pot environmentally friendly approach toward highly catalytically active bimetal-nanoparticle-graphene hybrids.
abstract: A one-pot universal approach with simple metal sputtering onto room temperature ionic liquids has been developed to prepare bimetal-nanoparticle (NP)-graphene hybrids, and the process is environmentally friendly and completely free of additives and byproducts. The graphene-supported bimetallic NPs have an Ag-based core and an Au/Pd-rich shell, demonstrated by the scanning transmission electron microscopy. The X-ray absorption near-edge spectroscopy using synchrotron radiation reveals the occurrence of charge redistribution at both the Ag@Au and Ag@Pd core-shell interfaces. The as-prepared Ag@Au and Ag@Pd bimetal-NP-graphene hybrids are highly catalytically active for reduction of 4-nitrophenol, whose catalytic activity is superior to the corresponding monometallic hybrids. The catalytic superiority is ascribed to the electronic structure modification and morphological irregularity of the graphene-supported bimetallic NPs.
authors.affiliation: Soochow University-Western University Joint Centre for Synchrotron Radiation Research, Soochow University, Suzhou, Jiangsu 215123, P R China.
authors.forename: Chang-Hai
authors.initials: CH
authors.lastname: Liu
authors.forename: Xiao-Qi
authors.initials: XQ
authors.lastname: Chen
authors.forename: Yong-Feng
authors.initials: YF
authors.lastname: Hu
authors.forename: Tsun-Kong
authors.initials: TK
authors.lastname: Sham
authors.forename: Qi-Jun
authors.initials: QJ
authors.lastname: Sun
authors.forename: Jian-Bing
authors.initials: JB
authors.lastname: Chang
authors.forename: Xu
authors.initials: X
authors.lastname: Gao
authors.forename: Xu-Hui
authors.initials: XH
authors.lastname: Sun
authors.forename: Sui-Dong
authors.initials: SD
authors.lastname: Wang