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Competitive photocatalytic reduction of H+ and C2H2 by Mo2S4(S2C2H4)2−2 on colloidal TiO2

✍ Scribed by Lufei Lin; Robert R. Kuntz

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 528 KB
Volume: 66
Category: Article
ISSN: 1010-6030
DOI: 10.1016/1010-6030(92)85218-j

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✦ Synopsis

The competitive photocatalytic reduction of H+ and GH, at catalytic sites formed when Mo,S,(S,~H,)~-is photoreduced on colloidal TiOz in the presence of a sacrificial electron donor was studied. Comparisons of the total number of electrons transferred to both substrates as a function of pH suggest that the substrates compete for a common catalytic site. Based on analogies with homogeneous solution studies, a mechanism involving an MO(N) dimeric species as the catalytic site is suggested. The efficiency for conversion of incident light to reduced products increases with decreasing light intensity and maximizes at about seven electrons transferred per 100 photons absorbed.

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