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Highly efficient photocatalytic reduction of CO2 and H2O to CO and H-2 with a cobalt bipyridyl complex
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2018 (English)In: Journal of Energy Challenges and Mechanics, ISSN 2095-4956, E-ISSN 2056-9386, Vol. 27, no 2, p. 502-506Article in journal (Refereed) Published
Abstract [en]

The development of efficient molecular catalysts for visible-light driven CO2 reduction, based on abundant materials, is necessary to meet energy demands and address environment problems. In this work, a Co(bpy)(2)Cl-2 catalyst was developed and showed high efficiency and durability for the photocatalytic reduction of CO2 and protons. Yields of CO and H-2 as high as 62.3 and 69.9 mu mol were achieved and the turnover numbers (TONs) reached 6230 and 6990, respectively, under light irradiation (lambda > 420 nm) for 4 h, indicating that the mixture gases could be a candidate as syngas. The apparent quantum yield was determined to be 2.1% for CO. Mechanistic studies revealed oxidative quenching of the photosensitizer Ru(bpy)(3)Cl-2 by the catalyst. The photocatalytic performance, flexible synthesis and non-noble metal catalyst in our system show great promise for the practical application of Co(bpy)(2)Cl-2 to photocatalytic reduction of CO2.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV , 2018. Vol. 27, no 2, p. 502-506
Keywords [en]
Cobalt catalyst, Photocatalysis, CO2 reduction, Oxidative quenching
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-224008DOI: 10.1016/j.jechem.2017.11.012ISI: 000425896100024Scopus ID: 2-s2.0-85041674763OAI: oai:DiVA.org:kth-224008DiVA, id: diva2:1192887
Note

QC 20180323

Available from: 2018-03-23 Created: 2018-03-23 Last updated: 2018-05-24Bibliographically approved

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Sun, Licheng

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