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Carbon nitride caught in the act of artificial photosynthesis

Author

Listed:
  • Daniel Cruz

    (Department of Inorganic Chemistry)

  • Sonia Żółtowska

    (Colloid Chemistry Department)

  • Oleksandr Savateev

    (Colloid Chemistry Department
    New Territories)

  • Markus Antonietti

    (Colloid Chemistry Department)

  • Paolo Giusto

    (Colloid Chemistry Department)

Abstract

Covalent semiconductors of the carbon nitride family are among the most promising systems to realize “artificial photosynthesis”, that is exploiting synthetic materials which use sunlight as an energy source to split water into its elements or converting CO2 into added value chemicals. However, the role of surface interactions and electronic properties on the reaction mechanism remain still elusive. Here, we use in-situ spectroscopic techniques that enable monitoring surface interactions in carbon nitride under artificial photosynthetic conditions. We show that the water adsorption and light illumination cause changes of the surface electron density, which activate the photocatalyst and enable the water splitting process. Our results reveal critical details on the photocatalytic mechanism, which proceeds through proton-coupled electron transfer, and provide key information to design more efficient photocatalyst for artificial photosynthesis.

Suggested Citation

  • Daniel Cruz & Sonia Żółtowska & Oleksandr Savateev & Markus Antonietti & Paolo Giusto, 2025. "Carbon nitride caught in the act of artificial photosynthesis," Nature Communications, Nature, vol. 16(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-024-55518-x
    DOI: 10.1038/s41467-024-55518-x
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