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Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
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Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
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The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
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Reaction centers are pigment-protein complexes that initiate energy conversion from photons to chemical entities. Therefore, photochemical reaction center is a more appropriate term that describes these complexes. The Nobel laureates Robert Emerson and William Arnold provided the first experimental evidence of photochemical reaction centers by demonstrating the participation of nearly 2,500 chlorophyll molecules for the release of just one molecule of oxygen. Despite thousands of photosynthetic...
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CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light
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Progress in photo-enzyme coupling catalysis for carbon dioxide reduction.

Ning Liu1, Wenfang Liu1

  • 1School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Liangxiang Higher Education Park, Fangshan District, Beijing 102488, PR China.

Biotechnology Advances
|November 28, 2025
PubMed
Summary

Photo-enzyme coupling catalysis (PECC) mimics natural photosynthesis for efficient carbon dioxide conversion. This innovative approach integrates photocatalysis and enzymatic catalysis, offering a promising solution for greenhouse gas capture and utilization.

Keywords:
Carbon dioxide conversionCompatibilityEnzyme immobilizationPhoto-enzyme coupling catalysis (PECC)Process optimizationSynergistic mechanism

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Area of Science:

  • Biocatalysis and Photocatalysis
  • Green Chemistry and Sustainable Technologies
  • Chemical Engineering and Materials Science

Background:

  • Mimicking natural photosynthesis offers a pathway for carbon dioxide (CO2) utilization.
  • Integrating photocatalysis and enzymatic catalysis presents a novel strategy for CO2 conversion.
  • Greenhouse gas capture and utilization are critical for mitigating climate change and energy challenges.

Purpose of the Study:

  • To provide a comprehensive review of recent advancements in photo-enzyme coupling catalysis (PECC) for CO2 conversion.
  • To elucidate the fundamental principles, key components, and synergistic mechanisms of photo-enzyme coupling systems (PECS).
  • To discuss strategies for enhancing PECS compatibility and explore future perspectives for industrial application.

Main Methods:

  • Review of existing literature on photo-enzyme coupling catalysis.
  • Categorization of PECS into cofactor-dependent and cofactor-independent systems.
  • Analysis of strategies for improving PECS compatibility, including compartmentalized immobilization and process optimization.

Main Results:

  • PECC effectively integrates photocatalysis and enzymatic catalysis for CO2 capture and utilization.
  • PECS demonstrate synergistic advantages in energy transfer and substrate activation.
  • Compartmentalized immobilization and process optimization enhance PECS compatibility.

Conclusions:

  • PECC is a promising technology for CO2 conversion, offering a sustainable pathway for greenhouse gas management.
  • Further advancements in photocatalyst efficiency, interfacial interactions, and enzyme engineering are crucial for industrial scalability.
  • PECC technology provides robust support for addressing global climate change and energy crises.