Light-Off in Plasmon-Mediated Photocatalysis.

ABSTRACT: In plasmon-mediated photocatalysis it is of critical importance to differentiate light-induced catalytic reaction rate enhancement channels, which include near-field effects, direct hot carrier injection, and photothermal catalyst heating. In particular, the discrimination of photothermal and hot electron channels is experimentally challenging, and their role is under keen debate. Here we demonstrate using the example of CO oxidation over nanofabricated neat Pd and Au₅₀Pd₅₀ alloy catalysts, how photothermal rate enhancement differs by up to 3 orders of magnitude for the same photon flux, and how this effect is controlled solely by the position of catalyst operation along the light-off curve measured in the dark. This highlights that small fluctuations in reactor tempe

SUBMITTER: Tiburski C 

PROVIDER: S-EPMC8320230 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature