Enhancement of electrocatalytic oxygen reduction reaction on Au-Ag nanorings by plasmon excitation

Tatsuya Kameyama; Kosuke Sasamoto; Tsukasa Torimoto

doi:10.1117/12.2573520

15 June 2020 Enhancement of electrocatalytic oxygen reduction reaction on Au-Ag nanorings by plasmon excitation

Tatsuya Kameyama, Kosuke Sasamoto, Tsukasa Torimoto

Proceedings Volume 11522, Optical Manipulation and Structured Materials Conference 2020; 115220W (2020) https://doi.org/10.1117/12.2573520
Event: SPIE Technologies and Applications of Structured Light, 2020, Yokohama, Japan

Abstract

Ring-shaped colloidal Au-Ag nanoparticles were successfully synthesized via galvanic replacement of Ag nanoplates as a template. The average size of Au-Ag nanorings was ca. 18 nm in diameter and its average width was ca. 4 nm. The thus-obtained nanorings showed a intense localized surface plasmon resonance (LSPR) peak at 680 nm. The Au-Ag nanorings exhibited an electrocatalytic activity for oxygen reduction reaction in an O2-saturated KOH aqueous solution at negative potential than +0.8 V vs. RHE, the activity being enhanced by the photoexcitation of LSPR.

Citation Download Citation

Tatsuya Kameyama, Kosuke Sasamoto, and Tsukasa Torimoto "Enhancement of electrocatalytic oxygen reduction reaction on Au-Ag nanorings by plasmon excitation", Proc. SPIE 11522, Optical Manipulation and Structured Materials Conference 2020, 115220W (15 June 2020); https://doi.org/10.1117/12.2573520

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