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Widely Controllable Syngas Production by a Dye-Sensitized TiO2 Hybrid System with Re-I and Co-III Catalysts under Visible-Light Irradiation

Authors
Lee, Jong-SuWon, Dong-IlJung, Won-JoSon, Ho-JinPac, ChyongjinKang, Sang Ook
Issue Date
19-1월-2017
Publisher
WILEY-V C H VERLAG GMBH
Keywords
heterogeneous catalysis; hydrogen evolution; organic-inorganic hybrid systems; photocatalysis; syngas
Citation
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, v.56, no.4, pp.976 - 980
Indexed
SCIE
SCOPUS
Journal Title
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume
56
Number
4
Start Page
976
End Page
980
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/84895
DOI
10.1002/anie.201608593
ISSN
1433-7851
Abstract
Visible-light irradiation of a ternary hybrid catalyst prepared by grafting a dye, an H-2 evolving Co-III catalyst and a CO-producing Re-I catalyst on TiO2 have been found to produce both H-2 and CO (syngas) in CO2-saturated N, N-dimethyl formamide (DMF)/water solution containing a 0.1M sacrificial electron donor. The H-2/CO ratios are effectively controlled by changing either the water content of the solvent or the molar ratio of the ReI and CoIII catalysts ranging from 1:2 to 15:1. The controlled syngas formation is discussed in terms of competitive electron flow from TiO2 to each of the CO2-reduction and hydrogen-evolving sites depending on the efficiencies of the two catalytic reaction cycles under given reaction conditions.
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