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

被引：151

作者：

Kwon, Seong Jung ^{[1
]}

Zhou, Hongjun ^{[1
]}

Fan, Fu-Ren F. ^{[1
]}

Vorobyev, Vasily ^{[1
]}

Zhang, Bo ^{[2
]}

Bard, Allen J. ^{[1
]}

机构：

[1] Univ Texas Austin, Ctr Electrochem, Dept Chem & Biochem, Austin, TX 78712 USA

[2] Univ Washington, Dept Chem, Seattle, WA 98195 USA

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2011年 / 13卷 / 12期

基金：

美国国家科学基金会;

关键词：

ELECTRON-TRANSFER; COLLISIONS; WATER;

D O I：

10.1039/c0cp02543g

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：5394 / 5402

页数：9

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