journal article·2014-10-22

Ultrathin Dendritic Pt3Cu Triangular Pyramid Caps with Enhanced Electrocatalytic Activity

Yun Kuang, Zhao Cai, Ying Zhang, Dongsheng He, Xiuling Yan, Yongmin Bi, Yaping Li, Ziyou Li, Xiaoming Sun

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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.
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Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · Nanoporous metals and alloys · Fuel Cells and Related Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China

Nanoscale Physics Research Laboratory, School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K.

Center of Advanced Nanocatalysis and School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China

School of Materials Science and Engineering, Shandong University, Jingshi Road 17923, Ji’nan 250061, P. R. China

Funding

Engineering and Physical Sciences Research Council · Ministry of Science and Technology of the People's Republic of China · European Cooperation in Science and Technology · National Natural Science Foundation of China

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