We are developing dye-sensitized NiO cathodes for the photo-reduction of carbon dioxide or water to CO and/or H<sub>2</sub>, which can be assembled with photoanodes for water oxidation. Separating the roles of light absorption, charge-transport and catalysis into separate materials enables each to be tuned to optimised efficiency and selectivity. The electron-transfer dynamics at each interface are key to the performance and a major challenge is slowing down charge recombination between the photoreduced dye and the oxidised NiO so that chemistry can take place. This presentation will describe highlights from recent work examining charge-transfer at the interface between NiO and new supramolecular photocatalysts using transient absorption spectroscopy and time-resolved infrared spectroscopy. The trends in performance with structure will be shown together with surface characterisation of the photocathodes to explore their stability. We will show that promising results can be obtained at moderate pH and ambient pressure.

Dye-sensitized photoelectrocatalytic systems for hydrogen evolution and CO<sub>2</sub> reduction

Fall 2022 abstracts, posters, and presentations will launch in mid-September.

ACS Fall 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.

Dye-sensitized photoelectrocatalytic systems for hydrogen evolution and CO2 reduction

Dye-sensitized photoelectrocatalytic systems for hydrogen evolution and CO₂ reduction