Synthesis and photocatalytic CO₂ reduction performance of metalloporphyrin and H₅[PMo₁₀V₂O₄₀]∙34.5H₂O composite catalyst

Abstract

Inspired by the structural motifs of chlorophyll, a series of bio-inspired Z-scheme heterojunction photocatalysts yPMo₁₀V₂/CoTPyP were constructed by integrating metalloporphyrin CoTPyP with H₅[PMo₁₀V₂O₄₀]·34.5H₂O. The optimized 0.1PMo₁₀V₂/CoTPyP heterojunction exhibits remarkable photocatalytic CO₂ reduction performance, achieving a CO production rate of 316.88 μmol·g⁻¹·h⁻¹, which is 3.7 times and 5.9 times higher than those of CoTPyP and H₂TPyP, respectively. Systematic characterization confirms that the Z-scheme electron transfer mechanism effectively promotes charge separation while maintaining high redox capability. This work demonstrates the feasibility of mimicking natural photosynthesis through rational material design and provides valuable insights for developing efficient artificial photosynthetic systems.

Keywords

metalloporphyrin / polymetaloxoanions / photocatalytic CO₂ reduction / Z-scheme

Supporting information

The supporting information, including detailed synthetic procedures for H₂TPyP, TMTPyP, and yPMo₁₀V₂/CoTPyP, as well as descriptions of photocatalytic CO₂ reduction tests, electrochemical measurements, SEM images of H₂TPyP and TMTPyP, nitrogen adsorption-desorption isotherms of H₂TPyP, and TEM elemental mapping of 0.1PMo₁₀V₂/CoTPyP, is available free of charge at https://doi.org/10.3724/jmolsci.2025110007.

Acknowledgements

We acknowledge financial support from Scientific Research Project of the Education Department of Jilin Province (JJKH20261766KJ), the National Natural Science Foundation of China (22478150, 22401018) and the Natural Science Foundation Project of Jilin Province (YDZJ202402054CXJD).

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