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A zero-gap gas phase photoelectrolyzer for CO2 reduction with porous carbon supported photocathodes

Abstract: A modified Metal-Organic Framework UiO-66-NH2-based photocathode in a zero-gap gas phase photoelectrolyzer was applied for CO2 reduction. Four types of porous carbon fiber layers with different wettability were employed to tailor the local environment of the cathodic surface reactions, optimizing activity and selectivity towards formate, methanol, and ethanol. Results are explained by mass transport through the different type and arrangement of carbon fiber support layers in the photocathodes and the resulting local environment at the UiO-66-NH2 catalyst. The highest energy-to-fuel conversion efficiency of 1.06% towards hydrocarbons was achieved with the most hydrophobic carbon fiber (H23C2). The results are a step further in understanding how the design and composition of the photoelectrodes in photoelectrochemical electrolyzers can impact the CO2 reduction efficiency and selectivity

 Authorship: Zhao Y., Merino-Garcia I., Albo J., Kaiser A.,

 Fuente: ChemSusChem, 2024, 17(16), e202400518

 Publisher: Wiley-VCH Verlag

 Publication date: 26/08/2024

 No. of pages: 9

 Publication type: Article

 DOI: 10.1002/cssc.202400518

 ISSN: 1864-5631,1864-564X

 Spanish project: TED2021-129810B-C21

 Publication Url: https://doi.org/10.1002/cssc.202400518

Authorship

ZHAO, YUJIE

KAISER, ANDREAS