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Issue 12, 2011
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Stochastic electrochemistry with electrocatalytic nanoparticles at inert ultramicroelectrodes—theory and experiments

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Abstract

Collisions of several kinds of metal or metal oxide single nanoparticles (NPs) with a less catalytic electrode surface have been observed through amplification of the current by electrocatalysis. Two general types of current response, a current staircase or a current blip (or spike) are seen with particle collisions. The current responses were caused by random individual events as a function of time rather than the usual continuous current caused by an ensemble of a large number of events. The treatment of stochastic electrochemistry like single NP collisions is different from the usual model for ensemble-based electrochemical behaviour. Models for the observed responses are discussed, including simulations, and the frequency of the steps or blips investigated for several systems experimentally.

Graphical abstract: Stochastic electrochemistry with electrocatalytic nanoparticles at inert ultramicroelectrodes—theory and experiments

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Publication details

The article was received on 15 Nov 2010, accepted on 14 Feb 2011 and first published on 28 Feb 2011


Article type: Paper
DOI: 10.1039/C0CP02543G
Phys. Chem. Chem. Phys., 2011,13, 5394-5402

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    Stochastic electrochemistry with electrocatalytic nanoparticles at inert ultramicroelectrodes—theory and experiments

    S. J. Kwon, H. Zhou, F. F. Fan, V. Vorobyev, B. Zhang and A. J. Bard, Phys. Chem. Chem. Phys., 2011, 13, 5394
    DOI: 10.1039/C0CP02543G

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