Photoinduced thermal copper reduction onto gold nanocrystals under potentiostatic control

被引：15

作者：

Redmond, Peter L. ^{[1
]}

Walter, Erich C. ^{[1
]}

Brus, Louis E. ^{[1
]}

机构：

[1] Columbia Univ, Dept Chem, New York, NY 10027 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2006年 / 110卷 / 50期

关键词：

D O I：

10.1021/jp063579h

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：

We study the photoreduction of adsorbed copper ions onto Au nanoparticles, on an indium tin oxide (ITO) electrode in an aqueous electrochemical cell, as a function of applied voltage and laser intensity. The photocurrent is a nonlinear function of laser intensity and increases sharply with cathodic voltage in the underpotential deposition region. The photoreduction is attributed to laser heating of the Au nanoparticles rather than "hot electron" processes. Numerical simulation of the Butler-Volmer kinetic equation using experimental parameters predicts a several orders of magnitude increase in current for a temperature rise of a few Kelvin.

引用

页码：25158 / 25162

页数：5

共 51 条

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[2]

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