Synthesis of Pt-Ni alloy nanocrystals with high-index facets and enhanced electrocatalytic properties

Xiling Xu; Xin Zhang; Hui Sun; Ying Yang; Xiaoping Dai; Jinsen Gao; Xueyong Li; Pengfang Zhang; Hong-Hui Wang; Neng-Fei Yu; Shi-Gang Sun

doi:10.1002/anie.201406497

Synthesis of Pt-Ni alloy nanocrystals with high-index facets and enhanced electrocatalytic properties

Angew Chem Int Ed Engl. 2014 Nov 10;53(46):12522-7. doi: 10.1002/anie.201406497. Epub 2014 Sep 4.

Authors

Xiling Xu¹, Xin Zhang, Hui Sun, Ying Yang, Xiaoping Dai, Jinsen Gao, Xueyong Li, Pengfang Zhang, Hong-Hui Wang, Neng-Fei Yu, Shi-Gang Sun

Affiliation

¹ State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Beijing 102249 (China).

PMID: 25195668
DOI: 10.1002/anie.201406497

Abstract

The shape-controlled synthesis of multicomponent metal nanocrystals (NCs) bounded by high-index facets (HIFs) is of significant importance in the design and synthesis of high-activity catalysts. We report herein the preparation of Pt-Ni alloy NCs by tuning their shape from concave-nanocubic (CNC) to nanocubic and hexoctahedral (HOH). Owing to the synergy of the HIFs and the electronic effect of the Pt-Ni alloy, the as-prepared CNC and HOH Pt-Ni alloy NCs exhibited excellent catalytic properties for the electrooxidation of methanol and formic acid, as well as for the oxygen reduction reaction (ORR).

Keywords: alloys; electrocatalysis; electrooxidation; nanocrystals; oxygen reduction reaction.