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Atomic Scale Deposition of Pt around Au Nanoparticles to Achieve Much Enhanced Electrocatalysis of Pt

Abstract

We report an electrochemical method to deposit atomic scale Pt on 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 10000 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/cm2) and 25 times higher mass activity (10.80 A/mgPt) with much better CO-tolerance and stability than the commercial Pt. Our work demonstrates a unique strategy to minimize the use of Pt as a catalyst for electrochemical reactions.

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Publication details

The article was received on 17 Apr 2017, accepted on 16 May 2017 and first published on 17 May 2017


Article type: Communication
DOI: 10.1039/C7NR02711G
Citation: Nanoscale, 2017, Accepted Manuscript
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    Atomic Scale Deposition of Pt around Au Nanoparticles to Achieve Much Enhanced Electrocatalysis of Pt

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

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