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Enhanced Photoelectrocatalysis Using a Bimetallic Plasmonic Near-Perfect Absorber
preprintsubmitted on 28.10.2020, 11:56 and posted on 29.10.2020, 13:09 by Qi Xiao, CALUM KINNEAR, Timothy U. Connell, Muhammad Kalim Kashif, Christopher D. Easton, Aaron Seeber, Laure Bourgeois, Gus O. Bonin, Noel W. Duffy, Anthony S. R. Chesman, Daniel E. Gómez
In this paper, we developed the fabrication of a plasmonic near-perfect absorber with a dense, uniform monolayer of AuPd alloyed nanoparticles as the absorbing layer. The nanoparticles were prepared by dewetting thin films (<4 nm) of each metal on a dielectric surface and extensive characterization confirmed the lack of other bimetallic phases. Plasmonic near-perfect absorbers containing an alloyed nanoparticle layer demonstrated both strong on-resonance absorption of incident light (up to 97%) and an improved photocatalytic response, compared to either monometallic derivative, for the photoelectrochemical reduction of water.