Inorganic chemistry in service of renewable energy science: Solar driven water oxidation by bioinspired manganese catalysts

G. Charles Dismukes, Robin Brimblecombe, Annette Koo, Gerhard Swiegers, Leone Spiccia

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Catalysts made from earth-abundant materials are needed for the splitting of water into its elements for renewable hydrogen fuel production. We have coupled a dye-sensitized titania film with a manganese-oxo "cubium" water-oxidation catalyst, [Mn4O4L6]+ (1+, L = bis(methoxyphenyl)phosphinate) to achieve the direct oxidation of water using visible light. The photo-catalyst assembly was prepared by sensitizing a titania-coated FTO conductive glass electrode with a ruthenium(II) dye, followed by over-coating with a proton-conducting membrane (Nafion) doped with 1+. Illumination of this photo-anode, when immersed in an aqueous electrolyte, generates a photocurrent that is sustained for multiple hours without the need for an applied potential. The complete photo-anode releases protons to solution and oxygen gas, simultaneously with photocurrent generation. The cooperation of all three components: catalyst, proton conductor and dye sensitized titania film were necessary for water oxidation to be achieved using only light as the driving force. This photoanode represents a functional molecular analog of photosystem II, the natural apparatus found in photosynthetic organisms.

Original languageEnglish
Title of host publicationAmerican Chemical Society - 238th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
Publication statusPublished - Dec 1 2009
Event238th National Meeting and Exposition of the American Chemical Society, ACS 2009 - Washington, DC, United States
Duration: Aug 16 2009Aug 20 2009

Publication series

NameACS National Meeting Book of Abstracts
ISSN (Print)0065-7727

Other

Other238th National Meeting and Exposition of the American Chemical Society, ACS 2009
CountryUnited States
CityWashington, DC
Period8/16/098/20/09

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ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Charles Dismukes, G., Brimblecombe, R., Koo, A., Swiegers, G., & Spiccia, L. (2009). Inorganic chemistry in service of renewable energy science: Solar driven water oxidation by bioinspired manganese catalysts. In American Chemical Society - 238th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers (ACS National Meeting Book of Abstracts).