Direct Plasmon-Accelerated Electrochemical Reaction on Gold Nanoparticles
2017; American Chemical Society; Volume: 11; Issue: 6 Linguagem: Inglês
10.1021/acsnano.7b01637
ISSN1936-086X
AutoresChen Wang, Xing‐Guo Nie, Yi Shi, Yue Zhou, Jing‐Juan Xu, Xing‐Hua Xia, Hong‐Yuan Chen,
Tópico(s)Biosensors and Analytical Detection
ResumoDirect 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.
Referência(s)