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Updated: Feb 2, 2026

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Function-Integrated Ru Catalyst for Photochemical CO2 Reduction.

Sze Koon Lee1,2, Mio Kondo1,2,3,4, Masaya Okamura1

  • 1Department of Life and Coordination-Complex Molecular Science , Institute for Molecular Science (IMS) , 5-1 Higashiyama, Myodaiji , Okazaki , Aichi 444-8787 , Japan.

Journal of the American Chemical Society
|November 27, 2018
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel Ruthenium (Ru) complex for visible-light-driven carbon dioxide (CO2) reduction, acting as both a photosensitizer and catalyst. This breakthrough offers efficient CO2 conversion for artificial photosynthesis applications.

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Area of Science:

  • Photocatalysis
  • Artificial Photosynthesis
  • Green Chemistry

Background:

  • Visible-light-driven catalytic reduction of carbon dioxide (CO2) is crucial for artificial photosynthesis.
  • Developing efficient photocatalysts is key to advancing sustainable energy solutions.

Purpose of the Study:

  • To demonstrate the first Ruthenium (Ru) complex capable of acting as both a photosensitizer and catalyst for CO2 reduction.
  • To achieve efficient and selective conversion of CO2 using visible light.

Main Methods:

  • Utilized a novel Ru complex as a dual-function photosensitizer and catalyst.
  • Conducted CO2 reduction reactions under visible-light irradiation.
  • Varied reaction media basicity to control product selectivity.

Main Results:

  • The Ru complex exhibited high activity for carbon monoxide (CO) evolution with a turnover number (TON) of 353 over 24 hours and a turnover frequency (TOF) of 14.7 h⁻¹.
  • Achieved excellent product selectivity (97%) for CO evolution.
  • Demonstrated selective formation of either CO or formic acid (HCOOH) by adjusting media basicity.

Conclusions:

  • The developed Ru complex is a highly effective function-integrated photocatalyst for visible-light-driven CO2 reduction.
  • This work opens new possibilities for photoredox catalysis using Ru-based systems.
  • Selective product formation control by reaction media offers tunable CO2 conversion pathways.