title: Monodispersed sub-5.0 nm PtCu nanoalloys as enhanced bifunctional electrocatalysts for oxygen reduction reaction and ethanol oxidation reaction.
abstract: The development of effective electrocatalysts with enhanced activity and stability for both the anode and the cathode reaction in fuel cells still remains a challenge. Here, we report a one-pot route to prepare monodispersed, uniform sub-5.0 nm PtCu alloy polyhedra with a narrow size distribution. These PtCu alloy polyhedra exhibit enhanced electrocatalytic activity for both cathode and anode reactions as compared to the commercial Pt/C catalyst under alkaline conditions. The specific activity and mass activity on Pt68Cu32nanoalloys are 15 and 2.8 times that on Pt/C catalyst toward oxygen reduction reaction (ORR), respectively. And the peak current density and mass activity on Pt68Cu32nanoalloys are 11.8 and 2.12 times that on Pt/C catalyst toward ethanol oxidation reaction (EOR), respectively. Furthermore, the as-synthesized Pt68Cu32nanoalloys have much higher stability than commercial Pt/C black for both ORR and EOR. These experimental results show an effective approach to the development of monodispersed, sub-5.0 nm PtCu nanoalloys as bifunctional electrocatalysts for both the cathode and the anode reaction in fuel cells.
authors.affiliation: Department of Chemistry, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou province 550025, P. R. China. qyuan@gzu.edu.cn.
authors.forename: Taiyang
authors.initials: T
authors.lastname: Liu
authors.affiliation: Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China. wangxun@mail.tsinghua.edu.cn.
authors.forename: Kai
authors.initials: K
authors.lastname: Wang
authors.affiliation: Department of Chemistry, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou province 550025, P. R. China. qyuan@gzu.edu.cn.
authors.forename: Qiang
authors.identifier: http://orcid.org/0000-0003-3022-9925
authors.initials: Q
authors.lastname: Yuan
authors.affiliation: State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, P. R. China.
authors.forename: Zebin
authors.initials: Z
authors.lastname: Shen
authors.affiliation: State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, P. R. China.
authors.forename: Ye
authors.identifier: http://orcid.org/0000-0003-0764-2279
authors.initials: Y
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, P. R. China.
authors.forename: Qinghong
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China. wangxun@mail.tsinghua.edu.cn.
authors.forename: Xun
authors.initials: X
authors.lastname: Wang