title: CeO2-modified α-MoO3nanorods as a synergistic support for Pt nanoparticles with enhanced COadstolerance during methanol oxidation.
abstract: A new type of Ce-doped α-MoO3(Ce0.2Mo0.8O3-δ) nanorod support was synthesized using a two-step hydrothermal method. The mixed oxide solid solution was employed as a novel non-carbon support for Pt catalysts used for the methanol electrooxidation in acidic media. The ratio of Ce to Mo in the solid-solution was systematically optimized in terms of the performance as a support for methanol oxidation. Pt nanoparticles with an average diameter of 2 nm were evenly deposited on Ce0.2Mo0.8O3-δnanorods. Compared to the Pt/MoO3and commercial Pt/C catalysts, the optimal Pt/Ce0.2Mo0.8O3-δcatalyst exhibited significantly enhanced COadstolerance during the methanol oxidation, thereby yielding the highest electrocatalytic activity and stability. The improved electrochemical performance can be ascribed to strengthened metal-support interactions derived from the high number of oxygen vacancies on Ce0.2Mo0.8O3-δalong with its unique one-dimensional nanorod structure. In addition, these findings suggest that the doping-induced structural and size transition of MoO3could provide a new pathway to develop doped oxides capable of providing sufficient electrical conductivity and possible synergistic effects with other active components for electrocatalysis applications.
authors.affiliation: School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China. liu_chuntao@163.com.
authors.forename: Yanying
authors.initials: Y
authors.lastname: Liu
authors.affiliation: School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China. liu_chuntao@163.com.
authors.forename: Chuntao
authors.initials: C
authors.lastname: Liu
authors.affiliation: School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China. liu_chuntao@163.com.
authors.forename: Xuefeng
authors.initials: X
authors.lastname: Yu
authors.affiliation: Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA. gangwu@buffalo.edu.
authors.forename: Hannah
authors.initials: H
authors.lastname: Osgood
authors.affiliation: Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA. gangwu@buffalo.edu.
authors.forename: Gang
authors.initials: G
authors.lastname: Wu