N-doped graphene supported PtAu/Pt intermetallic core/dendritic shell nanocrystals for efficient electrocatalytic oxidation of formic acid
Hui Xua, Bo Yana, Shumin Lia, Jin Wanga, Caiqin Wangb, Jun Guoc, Yukou Dua, *（杜玉扣）
a College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
b Chemistry Department, University of Toronto, Toronto M5S3H4, Canada
c Testing & Analysis Center, Soochow University, Jiangsu 215123, PR China
Chemical Engineering Journal 334 (2018) 2638--2646
Although explosive investigations on boosting the practical large-scale commercialization of fuel cells have beencarried out, the research on pursuing electrocatalysts with less cost, high activity, long lifetimeremains a formidable challenge. Inspired by this, we herein demonstrate a facile wet-chemical route to create a novel class ofN-doped graphene supported PtAu/Pt intermetallic core/dendritic shell nanocrystals for the first time. The resulted Pt1Au1/NG with intermetallic core and dendritic Pt shell combine both of the alloy and core-shell effectsto expose more surface active areas and high-index facet, which exhibit excellent mass and specific activities(1847.1 mA mg-1 and 14.95 mA cm-2) towards formic acid oxidation reaction. More importantly, such Pt1Au1/NG nanocatalyst can endure 500 cycles with little activity decay, displaying a newly-generated N-doped graphene supported Pt-based nanocatalysts with enhanced performance for fuel cells and beyond.
链接：https://www.sciencedirect.com/science/article/pii/S1385894717319009