Journal
FRONTIERS IN CHEMISTRY
Volume 6, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fchem.2018.00514
Keywords
CO2 reduction; polyoxometalate; homogeneous catalysis; water oxidation; photochemistry
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Funding
- PRIS grant from IISER Kolkata, India
- CCNU
- NSFC, P. R. China
- IISER Kolkata
- SERB [PDF/2017/000676]
- UGC
- FIRE
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Photocatalytic CO2 reduction in water is one of the most attractive research pursuits of our time. In this article we report a giant polyoxometalate {Mo-368} based homogeneous catalytic system, which efficiently reduces CO2 to formic acid with a maximum turnover number (TON) of 27,666, turnover frequency (TOF) of 4,611 h(-1) and external quantum efficiency of the reaction is 0.6%. The catalytic system oxidizes water and releases electrons, and these electrons are further utilized for the reduction of CO2 to formic acid. A maximum of 8.3 mmol of formic acid was observed with the loading of 0.3 mu mol of the catalyst. Our catalyst material is also stable throughout the reaction. The starting materials for this experiment are CO2 and H2O and the end products are HCOOH and O-2. The formic acid formed in this reaction is an important H-2 gas carrier and thus significant in renewable energy research.
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