Solar Fuel and Solar Hydrogen

Visible-light-driven hydrogen evolution with polyoxometalate as electron relay

[+] Author Affiliations
Xing Liu

Nanchang University, School of Chemistry, 999#, Xuefu Road, Nanchang 330031, China

Hengyang Normal University, Key Laboratory of Functional Organometallic Materials of College of Hunan Province, College of Chemistry and Material Science, 165#, Huangbai Road, Hengyang 421008, China

Yuexiang Li, Shaoqin Peng

Nanchang University, School of Chemistry, 999#, Xuefu Road, Nanchang 330031, China

Hua Lai, Zhengji Yi

Hengyang Normal University, Key Laboratory of Functional Organometallic Materials of College of Hunan Province, College of Chemistry and Material Science, 165#, Huangbai Road, Hengyang 421008, China

J. Photon. Energy. 6(4), 046501 (Oct 13, 2016). doi:10.1117/1.JPE.6.046501
History: Received August 5, 2016; Accepted September 23, 2016
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Abstract.  A visible-light-driven hydrogen evolution system was constructed in one step with xanthene dye as photosensitizer, triethanolamine (TEOA) as electron donor, Pt as cocatalyst, and Keggin-type silicon-tungsten polyoxometalate (POM) as electron relay. The average rate of hydrogen evolution from the eosin YPOMTEOAPtCl62 systems is 51.8  μmolh1, and the apparent quantum yield is 8.9% during 20 h irradiation (λ>420  nm;, a high-pressure Hg lamp was used as the light source). Ultraviolet–visible absorption spectra and fluorescence spectra were used to study the mechanism of charge transfer. A radical anion Dye, which generates from quenching of the triplet-excited state Dye3* by sacrificial electron donor, was considered the main species for transmitting electrons to POM and then to Pt. SiW9O3410, derived from SiW12O404, is the main form of POM in our reaction system, which can mediate the electron transfer from Dye to Pt, so an enhanced hydrogen evolution was realized. The present study highlights POM as electron relay in the photocatalytic hydrogen evolution process, which is expected to contribute to the development of functional and efficient artificial photosynthetic systems.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Xing Liu ; Yuexiang Li ; Shaoqin Peng ; Hua Lai and Zhengji Yi
"Visible-light-driven hydrogen evolution with polyoxometalate as electron relay", J. Photon. Energy. 6(4), 046501 (Oct 13, 2016). ; http://dx.doi.org/10.1117/1.JPE.6.046501


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