期刊
JOVE-JOURNAL OF VISUALIZED EXPERIMENTS
卷 -, 期 138, 页码 -出版社
JOURNAL OF VISUALIZED EXPERIMENTS
DOI: 10.3791/58072
关键词
Chemistry; Issue 138; Polyoxometalate; metal-to-metal charge transfer; artificial photosynthesis; manganese oxide; oxygen evolution; product separation
资金
- Global Center of Excellence for Mechanical Systems Innovation program of the University of Tokyo
- University Tokyo
- JSPS KAKENHI [17K17718]
- Grants-in-Aid for Scientific Research [17K17718] Funding Source: KAKEN
This paper presents a method to prepare charge-transfer chromophores using polyoxotungstate (PW12O403-), transition metal ions (Ce3+ or Co2+), and organic polymers, with the aim of photo-activating oxygen-evolving manganese oxide catalysts, which are important components in artificial photosynthesis. The cross-linking technique was applied to obtain a self-standing membrane with a high PW12 O-40(3-) content. Incorporation and structure retention of PW12O403- within the polymer matrix were confirmed by FT-IR and micro-Raman spectroscopy, and optical characteristics were investigated by UV-Vis spectroscopy, which revealed successful construction of the metal-to-metal charge transfer (MMCT) unit. After deposition of MnOx oxygen evolving catalysts, photocurrent measurements under visible light irradiation verified the sequential charge transfer, Mn -> MMCT unit -> electrode, and the photocurrent intensity was consistent with the redox potential of the donor metal (Ce or Co). This method provides a new strategy for preparing integrated systems involving catalysts and photon-absorption parts for use with photo-functional materials.
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