Publication date: 28th August 2024
Semi-artificial photosynthesis interfaces biological catalysts with synthetic materials such as electrodes or light absorbers to overcome limitations in natural and artificial photosynthesis. The benefit of using biocatalysts in catalytic CO2 utilisation is their electrochemical reversibility that allows operation at very low overpotentials with high selectivity, in addition to their chirality that enables enantioselective synthesis. This presentation will summarise my research group’s progress in integrating the CO2 reducing enzyme formate dehydrogenase into bespoke hierarchical 3D electrode scaffolds and the exploitation in solar-powered catalysis towards the synthesis of chiral organics via enzymatic cascade reactions. I will present the electrochemical features and characterisation of the biocatalyst-material interface and provide my team's understanding of the electrochemical properties of the immobilised enzymes. This insight allows the wiring of the biocatalyst into electrocatalytic schemes, photoelectrochemical devices and photocatalytic systems for unique CO2 utilisation reactions. The fundamental insights gained by integrating isolated CO2-utilising enzymes in electrodes will be presented and the case be made that this enzyme allows opening a solar-to-chemical conversion space that is currently not accessible with purly synthetic or biological systems.
Support by the UKRI (ERC Advanced Grant, domino4chem) is acknowledged.
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