title: Microfluidic Synthesis Enables Dense and Uniform Loading of Surfactant-Free PtSn Nanocrystals on Carbon Supports for Enhanced Ethanol Oxidation.
abstract: Developing new synthetic methods for carbon supported catalysts with improved performance is of fundamental importance in advancing proton exchange membrane fuel cell (PEMFC) technology. Continuous-flow, microfluidic reactions in capillary tube reactors are described, which are capable of synthesizing surfactant-free, ultrafine PtSn alloyed nanoparticles (NPs) on various carbon supports (for example, commercial carbon black particles, carbon nanotubes, and graphene sheets). The PtSn NPs are highly crystalline with sizes smaller than 2 nm, and they are highly dispersed on the carbon supports with high loadings up to 33 wt%. These characteristics make the as-synthesized carbon-supported PtSn NPs more efficient than state of the art commercial Pt/C catalysts applied to the ethanol oxidation reaction (EOR). Significantly enhanced mass catalytic activity (two-times that of Pt/C) and improved stability are obtained.
authors.affiliation: Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Chemical Engineering, Beijing University of Technology, Beijing, 100124, P.R. China.
authors.forename: Fuxiang
authors.initials: F
authors.lastname: Wu
authors.affiliation: Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Chemical Engineering, Beijing University of Technology, Beijing, 100124, P.R. China.|Department of Chemistry, Temple University, Philadelphia, PA, 19122, USA.
authors.forename: Dongtang
authors.initials: D
authors.lastname: Zhang
authors.affiliation: Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Chemical Engineering, Beijing University of Technology, Beijing, 100124, P.R. China.
authors.forename: Manhua
authors.initials: M
authors.lastname: Peng
authors.affiliation: Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Chemical Engineering, Beijing University of Technology, Beijing, 100124, P.R. China.
authors.forename: Zhihui
authors.initials: Z
authors.lastname: Yu
authors.affiliation: Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Chemical Engineering, Beijing University of Technology, Beijing, 100124, P.R. China. xiayanwang@bjut.edu.cn.
authors.forename: Xiayan
authors.initials: X
authors.lastname: Wang
authors.affiliation: Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Chemical Engineering, Beijing University of Technology, Beijing, 100124, P.R. China.
authors.forename: Guangsheng
authors.initials: G
authors.lastname: Guo
authors.affiliation: Department of Chemistry, Temple University, Philadelphia, PA, 19122, USA.
authors.forename: Yugang
authors.initials: Y
authors.lastname: Sun
keywords: carbon supports; electrocatalysis; ethanol oxidation reactions; microfluidic synthesis; platinum tin alloyed nanoparticles