title: Ultrathin dendritic Pt3Cu triangular pyramid caps with enhanced electrocatalytic activity.
abstract: Here we report on the synthesis of novel dendritic Pt3Cu triangular pyramid caps via a solvothermal coreduction method. These caps had three-dimensional caved structures with ultrathin branches, as evidenced by high-resolution transmission electron microscopy (HRTEM) and HAADF-STEM characterization. Tuning the reduction kinetics of two metal precursors by an iodide ion was believed to be the key for the formation of an alloyed nanostructure. Electro-oxidation of methanol and formic acid showed dramatically improved electrocatalytic activities and poison-tolerance for these nanoalloys as compared to commercial Pt/C catalysts, which was attributed to their unique open porous structure with interconnected network, ultrahigh surface areas, as well as synergetic effect of the two metallic components.
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology , Beijing 100029, P. R. China.
authors.forename: Yun
authors.initials: Y
authors.lastname: Kuang
authors.forename: Zhao
authors.initials: Z
authors.lastname: Cai
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhang
authors.forename: Dongsheng
authors.initials: D
authors.lastname: He
authors.forename: Xiuling
authors.initials: X
authors.lastname: Yan
authors.forename: Yongmin
authors.initials: Y
authors.lastname: Bi
authors.forename: Yaping
authors.initials: Y
authors.lastname: Li
authors.forename: Ziyou
authors.initials: Z
authors.lastname: Li
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Sun
keywords: Pt3Cu alloy; anti-CO poisoning; dendritic pyramid cap; fuel oxidation; ultrathin branch