Atomically Dispersed Pt on Screw‐like Pd/Au Core‐shell Nanowires for Enhanced Electrocatalysis. Issue 18 (28th October 2019)

• Record Type: Journal Article
• Authors: Chao, Tingting; Zhang, Yida; Hu, Yanmin; Zheng, Xusheng; Qu, Yunteng; Xu, Quan; Hong, Xun
• Is Part Of: Chemistry. Volume 26:Issue 18(2020)
• Page Start: 4019
• Page End: 4024
• Publication Date: 2019-10-28
• Subjects: alloys -- hydrogen evolution reaction -- nanowires -- oxygen reduction reaction -- Pt single atoms; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201903992
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: Engineering noble metal nanostructures at the atomic level can significantly optimize their electrocatalytic performance and remarkably reduce their usage. We report the synthesis of atomically dispersed Pt on screw‐like Pd/Au nanowires by using ultrafine Pd nanowires as seeds. Au can selectively grow on the surface of Pd nanowires by an island growth pattern to fabricate surface defect sites to load atomically dispersed Pt, which can be confirmed by X‐ray absorption fine structure measurements and aberration corrected HRTEM images. The nanowires with 2.74 at % Pt exhibit superior HER properties in acidic solution with an overpotential of 20.6 mV at 10 mA cm −2 and enhanced alkaline ORR performance with a mass activity over 15 times greater than the commercial platinum/carbon (Pt/C) catalysts. Abstract : Nanowires : Atomically dispersed Pt on screw‐like Pd/Au core–shell nanowires exhibit enhanced electrocatalytic activities towards acidic HER and alkaline ORR, even comparable to commercial Pt/C (see figure).