title: Pt@Au nanorods uniformly decorated on pyridyne cycloaddition graphene as a highly effective electrocatalyst for oxygen reduction.
abstract: Preparing metal-supported graphene nanocomposites is both interesting and challenging because of their well-defined morphologies and have potential application for oxygen reduction reaction (ORR). Here, we present an easy approach to synthesizing a novel hybrid material composed of Pt@Au nanorods (NRs) uniformly dispersed on the pyridyne cycloaddition of graphene (Pt@Au-PyNG), and the material serves as a high-performance catalyst for ORR. This hybrid electrocatalyst significantly decreases the use of Pt by using Pt dispersed on Au NRs and shows a markedly high activity toward ORR. The resulting Pt@Au-PyNG hybrid displayed comparable electrocatalytic activity and better stability than commercial Pt/C in alkaline solutions toward ORR. The hybrid effectively blocks CO formation to increase catalyst resistance to CO poisoning, thereby decreasing the amount of Pt needed. Free-energy diagrams for ORR on Pt@Au (111) through dissociative and associative mechanisms show that OH or O hydrogenation is the rate-limiting step based on DFT calculations.
authors.affiliation: College of Chemical Engineering, Zhejiang University of Technology , Hangzhou 310014, China.
authors.forename: Xing
authors.initials: X
authors.lastname: Zhong
authors.forename: Huiyou
authors.initials: H
authors.lastname: Yu
authors.forename: Xinde
authors.initials: X
authors.lastname: Wang
authors.forename: Lin
authors.initials: L
authors.lastname: Liu
authors.forename: Yu
authors.initials: Y
authors.lastname: Jiang
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Guilin
authors.initials: G
authors.lastname: Zhuang
authors.forename: Youqun
authors.initials: Y
authors.lastname: Chu
authors.forename: Xiaonian
authors.initials: X
authors.lastname: Li
authors.forename: Jian-guo
authors.initials: JG
authors.lastname: Wang