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Issue 3, 2018
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The mechanism of electrochemical reduction of hydrogen peroxide on silver nanoparticles

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Abstract

The reduction of hydrogen peroxide on a silver nanoparticle modified boron doped diamond electrode in a neutral solution is shown to proceed through a CE mechanism. Hydrogen peroxide undergoes a disproportionation reaction to form oxygen (and water) on the silver surface, creating a diffusion layer of oxygen, which, at a sufficiently biased electrode, is then reduced to hydrogen peroxide. Voltammetry and a full mechanistic simulation are undertaken to confirm the mechanism, showing at short times a dependence of the reductive signal on waiting time prior to voltammetric analysis reflecting the extent of the disproportionation step which occurs prior to voltammetric analysis.

Graphical abstract: The mechanism of electrochemical reduction of hydrogen peroxide on silver nanoparticles

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Supplementary files

Article information


Submitted
06 Nov 2017
Accepted
11 Dec 2017
First published
11 Dec 2017

Phys. Chem. Chem. Phys., 2018,20, 1608-1614
Article type
Paper

The mechanism of electrochemical reduction of hydrogen peroxide on silver nanoparticles

X. Cai, E. E. L. Tanner, C. Lin, K. Ngamchuea, J. S. Foord and R. G. Compton, Phys. Chem. Chem. Phys., 2018, 20, 1608
DOI: 10.1039/C7CP07492A

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