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- Title
Theoretical Study of p -Block Metal Single-Atom-Loaded Carbon Nitride Catalyst for Photocatalytic Water Splitting.
- Authors
Chen, Mengning; Wu, Yidi; Wan, Qiang; Lin, Sen
- Abstract
Graphitic carbon nitride (g-C3N4), recognized for its considerable potential as a heterogeneous photocatalyst in water splitting, has attracted extensive research interest. By using density functional theory (DFT) calculations, the regulatory role of p-block metal (PM) single atoms on the photocatalytic activity of g-C3N4 in overall water splitting was systematically explored. The incorporation of PM atoms (Ge, Sn and Pb) led to a reduction in the overpotentials required for both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER). Combined with the electronic structures analysis via hybrid functional, it was found that the introduction of Ge, Sn or Pb optimizes the positions of the valence band maximum (VBM) and the conduction band minimum (CBM), providing a robust driving force for HER and ensuring substantial driving force for OER. Meanwhile, the presence of these three PMs induces the spatial separation of VBM and CBM, inhibiting the recombination of carriers. These findings have significant implications for the design and preparation of efficient photocatalysts.
- Subjects
NITRIDES; OXYGEN evolution reactions; METALS; HYDROGEN evolution reactions; CONDUCTION bands; VALENCE bands
- Publication
Molecules, 2024, Vol 29, Issue 9, p2030
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules29092030