8-Co-Containing Polyoxomolybdate for CO₂ Photoreduction Reaction

Area of Science:

• Inorganic Chemistry
• Materials Science
• Catalysis

Background:

• Polyoxometalates (POMs) are versatile inorganic clusters with diverse structures and applications.
• Tungsten- and molybdenum-based POMs are extensively studied for catalytic and material properties.
• Cobalt-substituted POMs offer unique electronic and structural features for advanced applications.

Purpose of the Study:

• To synthesize and characterize a novel cobalt-containing polyoxomolydate with a unique structural motif.
• To investigate the catalytic activity of this new POM for light-driven carbon dioxide reduction.
• To expand the structural diversity of transition metal-substituted sandwich-type POMs.

Main Methods:

• One-pot synthesis of the polyoxomolydate compound (NH4)4Cs6H8[Co2{Co3(OH)(H2O)(VMo12O42)(VMo7O28)}2]·60H2O.
• Structural characterization using X-ray diffraction and other spectroscopic techniques.
• Evaluation of catalytic performance in light-driven CO2 reduction reactions.

Main Results:

• An S-shaped, 8-cobalt-containing polyoxomolydate with a triple-sandwich structure was successfully synthesized.
• A unique petal-like {VMo12O42} subunit, previously unreported in POM chemistry, was identified.
• The compound demonstrated potential as a catalyst for light-driven CO2 reduction, highlighting its catalytic applicability.

Conclusions:

• The synthesis of this novel POM expands the structural diversity within the molybdovanadate family.
• The study presents the first systematic investigation of molybdovanadates for light-driven CO2 reduction.
• The findings underscore the potential of transition metal-substituted sandwich-type POMs in catalytic applications, particularly for CO2 valorization.