期刊
ACS APPLIED NANO MATERIALS
卷 1, 期 10, 页码 5805-5811出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.8b01436
关键词
gold nanostructures; localized surface plasmon resonance (LSPR); hot spots; plasmon-enhanced electrochemistry; ascorbic acid
资金
- National Natural Science Foundation of China [21327902, 21575163, 21635004, 21874155, 81573557]
- Natural Science Foundation of Jiangsu Province [BK20151437]
Recently, the direct utilization of plasmonic metal nanostructures in accelerating the electrochemical reactions reveals the importance of hot charge carriers generated by localized surface plasmon resonance (LSPR). However, the effect of morphological forms of the same metal element on direct plasmon-enhanced electrocatalytic activity has not yet been well documented. Herein, four kinds of Au nanostructures with different morphologies of nanospheres (NSPs), nanorods (NRs), nanostars (NSs), and triangular nanoplates (NPLs) were synthesized. The shape-dependent plasmonic enhancement effect of Au nanostructures toward the electrooxidation of ascorbic acid (AA) was studied. We find that the electrochemistry of AA oxidation on these Au nanostructures can be enhanced upon light irradiation with the higher enhancement effect of the Au NPLs and NSs than the Au NSPs and NRs. This shape-dependent enhancement effect is suggested to be related to the number of hot spots in different NP surfaces generated from Au LSPR Thus, the present work would shed new light on the direct plasmon-enhanced electrochemistry, which helps in widening the potential applications of plasmonic materials in electrochemical sensors and electrochemical energy conversion.
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