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Title: Atomic scale deposition of Pt around Au nanoparticles to achieve much enhanced electrocatalysis of Pt

Journal Article · · Nanoscale
DOI:https://doi.org/10.1039/C7NR02711G· OSTI ID:1377025
ORCiD logo [1];  [1];  [1];  [2];  [3];  [1];  [1]; ORCiD logo [1]
  1. Brown Univ., Providence, RI (United States). Dept. of Chemistry
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials
  3. Huazhong Univ. of Science and Technology, Wuhan (China). School of Materials Science and Engineering

Here, we report an electrochemical method to deposit atomic scale Pt on a 5 nm Au nanoparticle (NP) surface in N2-saturated 0.5 M H2SO4. Furthermore, Pt is provided by the Pt wire counter electrode via one-step Pt wire oxidation, dissolution, and deposition realized by controlled electrochemical scanning. Scanning from 0.6–1.0 V (vs. RHE) for 10 000 cycles gives Au98.2Pt1.8, which serves as an excellent catalyst for the formic acid oxidation reaction, showing 41 times higher specific activity (20.19 mA cm-2) and 25 times higher mass activity (10.80 A mgPt-1) with much better CO-tolerance and stability than commercial Pt. This work demonstrates a unique strategy to minimize the use of Pt as a catalyst for electrochemical reactions.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC00112704
OSTI ID:
1377025
Report Number(s):
BNL-114185-2017-JA; NANOHL; R&D Project: 16060; 16060; KC0403020
Journal Information:
Nanoscale, Vol. 9, Issue 23; ISSN 2040-3364
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 20 works
Citation information provided by
Web of Science

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Cited By (3)