Abstract
AbstractBio‐nano hybrids with methanogens and nano‐semiconductors provide an innovative strategy for solar‐driven CO2‐to‐CH4conversion; however, the efficiency mismatch between electron production and utilisation results in low quantum yield and CH4selectivity. Herein, we report the integration of metal‐free polymeric carbon nitrides (CNx) decorated with cyanamide (NCN) groups andMethanosarcina barkeri(M. b). The self‐assembledM. b‐NCNCNxexhibited a quantum yield of 50.3 % with 92.3 % CH4selectivity under illumination, which outperforms other reported bio‐nano hybrid systems and photocatalytic systems for CO2reduction. This excellent performance was attributed to the distinct capacitance and conductive effects ofNCNCNx, which promoted electron storage and redistribution at the biotic–abiotic interface to alleviate recombination losses and side reaction. This study provides new design guidelines for bio‐nano hybrids for the sustainable photocatalytic reduction of CO2into fuels.
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