Issue 17, 2020

Hydrogen peroxide reduction on single platinum nanoparticles

Abstract

Understanding oxygen reduction, key to much of electrochemical energy transformation technology, crucially requires exploration of the role of hydrogen peroxide as a possible intermediate especially on catalysts such as Pt which can bring about the 4e reduction of O2 to water. We reveal that at the single nanoparticle scale the direct platinum catalysed reduction of hydrogen peroxide is found – even at high overpotentials – not to be controlled by the rate mass-transport of the reagents to the interface but by a surface limited process. Further under alkaline (pH 12.3) and near mass-transport free conditions, the single nanoparticle hydrogen peroxide reduction rate goes through a maximum at potentials comparable to the surface deposition of hydrogen (Hupd) with the highest reaction rate occurring when the surface is partially covered in hydrogen.

Graphical abstract: Hydrogen peroxide reduction on single platinum nanoparticles

Supplementary files

Article information

Article type
Edge Article
Submitted
20 Jan 2020
Accepted
03 Apr 2020
First published
08 Apr 2020
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2020,11, 4416-4421

Hydrogen peroxide reduction on single platinum nanoparticles

X. Chang, C. Batchelor-McAuley and R. G. Compton, Chem. Sci., 2020, 11, 4416 DOI: 10.1039/D0SC00379D

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