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Issue 23, 2017
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Atomic scale deposition of Pt around Au nanoparticles to achieve much enhanced electrocatalysis of Pt

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Abstract

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. 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. Our work demonstrates a unique strategy to minimize the use of Pt as a catalyst for electrochemical reactions.

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

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Article information


Submitted
17 Apr 2017
Accepted
16 May 2017
First published
17 May 2017

Nanoscale, 2017,9, 7745-7749
Article type
Communication

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

Z. Xi, H. Lv, D. P. Erdosy, D. Su, Q. Li, C. Yu, J. Li and S. Sun, Nanoscale, 2017, 9, 7745
DOI: 10.1039/C7NR02711G

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