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- Title
One-pot synthesis of Pt−Cu bimetallic nanocrystals with different structures and their enhanced electrocatalytic properties.
- Authors
Gao, Daowei; Li, Shuna; Song, Guolong; Zha, Pengfei; Li, Cuncheng; Wei, Qin; Lv, Yipin; Chen, Guozhu
- Abstract
Shape-controlled synthesis of Pt−Cu alloy nanocrystals (NCs) with unique geometries is of great importance in the rational design and deterministic synthesis of highly active electrocatalysts. Herein, Pt−Cu alloy NCs with concave octahedron (COH), porous octahedron (POH), yolk-shell (YSH), and nanoflower (NOF) structures were fabricated by altering the sequential reduction kinetics in a one-pot aqueous phase. The effect of the reaction kinetics on the formation of Pt−Cu bimetallic NCs with different morphologies was analyzed quantitatively. The concentrations of glycine and metal cation are demonstrated to play a key role in the reduction of Pt(IV) and Cu(II) ions; these significantly affected the morphology of Pt−Cu NCs. These Pt−Cu alloy NCs exhibit substantially enhanced catalytic activity and durability for methanol and formic acid oxidation compared to the commercial Pt/C catalyst. Specifically, the COH and NOF Pt−Cu NCs with more step atoms, intragranular dislocations, and protrusions showed superior electrochemical properties than those of POH and YSH Pt−Cu NCs. The structure-property relationship between the Pt−Cu NCs and their electrochemical performances was also investigated in depth.<graphic></graphic>
- Publication
Nano Research, 2018, Vol 11, Issue 5, p2612
- ISSN
1998-0124
- Publication type
Article
- DOI
10.1007/s12274-017-1888-5