等离子体子
表面等离子共振
材料科学
电化学
电催化剂
纳米颗粒
胶体金
纳米技术
光催化
局域表面等离子体子
电极
光电子学
化学
催化作用
物理化学
生物化学
作者
Chen Wang,Xing-Guo Nie,Yi Shi,Yue Zhou,Jing‐Juan Xu,Xing‐Hua Xia,Hong‐Yuan Chen
出处
期刊:ACS Nano
[American Chemical Society]
日期:2017-05-17
卷期号:11 (6): 5897-5905
被引量:212
标识
DOI:10.1021/acsnano.7b01637
摘要
Direct photocatalysis making use of plasmonic metals has attracted significant attention due to the light-harnessing capabilities of these materials associated with localized surface plasmon resonance (LSPR) features. Thus far, most reported work has been limited to plasmon-induced chemical transformations. Herein, we demonstrate that electrochemical reactions can also be accelerated by plasmonic nanoparticles upon LSPR excitation. Using glucose electrocatalysis as a model reaction system, the direct plasmon-accelerated electrochemical reaction (PAER) on gold nanoparticles is observed. The wavelength- and solution-pH-dependent electrochemical oxidation rate and the dark-field scattering spectroscopy results confirm that the hot charge carriers generated during plasmon decay are responsible for the enhanced electrocatalysis performance. Based on the proposed PAER mechanism, a plasmon-improved glucose electrochemical sensor is constructed, demonstrating the enhanced performance of the non-enzyme sensor upon LSPR excitation. This plasmon-accelerated electrochemistry promises potential applications in (bio)electrochemical energy conversion, electroanalysis, and electrochemical devices.
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