title: Hierarchical nanoporous gold-platinum with heterogeneous interfaces for methanol electrooxidation.
abstract: The electrocatalysts utilized as the prospective electrodes in fuel cells and high efficient energy conversion devices require both the interconnected channels for efficient electrolyte transportation and the superior catalytic activity with long service life. In this work, nanoporous gold with the rigid skeletons in three dimensions is partially decorated by porous platinum shell containing nanoscale interstitials, aiming to create the heterogeneous gold-platinum interfaces and facilitate the electrolyte transportation as well. In comparison with no catalytic activity of bare nanoporous gold, the catalytic activity of hierarchical nanoporous gold-platinum towards electrochemical oxidation of methanol increases with the loading level of platinum shells, resulting in the highest electrochemical area of 70.4 m(2)·g(-1) after the normalization by the mass of platinum. Heterogeneous gold-platinum interfaces affect the tolerance of the absorbed intermediate species because of the oxidization by the oxygenated species absorbed on the gold surface and the enhanced ion transportation within the porous platinum shell.
authors.affiliation: 1] School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China [2].
authors.forename: Shuang
authors.initials: S
authors.lastname: Xiao
authors.affiliation: 1] School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China [2].
authors.forename: Fei
authors.initials: F
authors.lastname: Xiao
authors.affiliation: School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Hu
authors.affiliation: School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China.
authors.forename: Songliu
authors.initials: S
authors.lastname: Yuan
authors.affiliation: School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China.
authors.forename: Shuai
authors.initials: S
authors.lastname: Wang
authors.affiliation: School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China.
authors.forename: Lihua
authors.initials: L
authors.lastname: Qian
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
authors.forename: Yunqi
authors.initials: Y
authors.lastname: Liu