Isotopic hydrogen evolution reaction by plasmonic electrochemistry

Hiro Minamimoto; Daiki Sato; Kei Murakoshi

doi:10.1117/12.2573789

15 June 2020 Isotopic hydrogen evolution reaction by plasmonic electrochemistry

Hiro Minamimoto, Daiki Sato, Kei Murakoshi

Proceedings Volume 11522, Optical Manipulation and Structured Materials Conference 2020; 115220B (2020) https://doi.org/10.1117/12.2573789
Event: SPIE Technologies and Applications of Structured Light, 2020, Yokohama, Japan

Abstract

Highly localized electric field induced by the excitation of the localized surface plasmon provides huge gradient of the field intensity in nano-scale. Such gradient results in exotic perturbation for molecules at electrified interfaces with plasmonically-active metal nanostructures. In this study, plasmon-induced hydrogen evolution reactions have been successfully induced by the combination of the plasmonic metal nanostructures on the p-type GaP semiconductor electrode. Through various photoelectrochemical measurements, it was found that the present system showed the relatively higher efficiency under the neutral condition compared with the acidic and the basic conditions. In addition, the unique molecular process has been observed by using the isotopic water molecules. By the examination of the isotopic effect, the effect of the field localization on the reaction was discussed.

Citation Download Citation

Hiro Minamimoto, Daiki Sato, and Kei Murakoshi "Isotopic hydrogen evolution reaction by plasmonic electrochemistry", Proc. SPIE 11522, Optical Manipulation and Structured Materials Conference 2020, 115220B (15 June 2020); https://doi.org/10.1117/12.2573789

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