Solar-Driven Paired CO2 Reduction–Alcohol Oxidation Using Semiartificial Suspension, Photocatalyst Sheet, and Photoelectrochemical Devices

• DOI: 10.1021/jacs.4c10519
• Publication Date: 2025-02-28T18:53:16Z
• Authors: Motiar Rahaman; Carolina Pulignani; Melanie Miller; Subhajit Bhattach...; Ariffin Bin Moham...; Rita R. Manuel; Inês A. C. Pereira; Erwin Reisner
• Keywords: Suspension; Alcohol Oxidation; Visible spectrum

Fuel-forming enzymes can display excellent performance, achieving high rates of catalysis with unity selectivity at minimal overpotentials, but they are generally considered to be fragile and difficult handle in combination synthetic semiconductors light-driven chemical synthesis. Here, we demonstrate a biohybrid platform that is assembled from cyanamide-functionalized carbon nitride (CNX) as scalable inexpensive photosensitizer selectively photo-oxidizes 4-methyl benzyl alcohol (MBA) its aldehyde (MBAld), indium tin oxide (ITO) nanoparticles electron conduit biocatalyst support material, the enzyme formate dehydrogenase (FDH) for selective CO2-to-formate reduction. This integrated semiartificial multicomponent system used several configurations drive bias-free operation, including (i) photocatalytic suspension, (ii) photocatalyst sheet, (iii) photoelectrochemical cell. The unprecedented adaptability robustness systems motivated us select best performing practical solar production by deploying 50 cm2 CNX–ITO|FDH photosheet device 3 days under natural sunlight produce 41 (mmol formate) m–2 35 aldehyde) m–2. We have therefore demonstrated provides robust versatile enables synthesis outdoor operation using sunlight.