Maximizing H2 production in Photosystem I/dithiol molecular wire/platinum nanoparticle bioconjugates

Rebecca Ann Grimme, Carolyn Elizabeth Lubner, John H. Golbeck

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Photosystem I/dithiol molecular wire/nanoparticle bioconjugates have been shown to photocatalytically generate dihydrogen at linear rates when continuously illuminated. In an effort to maximize H2 production, the pH and ionic concentration of the solution, the mobility of the electron donor, the length and degree of saturation of the molecular wire, and the intensity of the light were systematically investigated. Optimal conditions included a solution buffered at pH 6.0, cross-linked plastocyanin, rebuilt spinach PS I, and the use of 1,4-benzenedithiol to connect PS I to the Pt nanoparticle. Illumination of this optimized Photosystem I/dithiol molecular wire/nanoparticle bioconjugate at a light intensity of 70 μE m-2 s-1 generated a measured one time H2 production rate of 312 μmol H2 mg Chl-1 h-1.

Original languageEnglish (US)
Pages (from-to)10106-10113
Number of pages8
JournalDalton Transactions
Issue number45
DOIs
StatePublished - Dec 31 2009

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Photosystem I Protein Complex
Platinum
Wire
Nanoparticles
Plastocyanin
Lighting
Electrons
dithiol

All Science Journal Classification (ASJC) codes

  • Inorganic Chemistry

Cite this

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abstract = "Photosystem I/dithiol molecular wire/nanoparticle bioconjugates have been shown to photocatalytically generate dihydrogen at linear rates when continuously illuminated. In an effort to maximize H2 production, the pH and ionic concentration of the solution, the mobility of the electron donor, the length and degree of saturation of the molecular wire, and the intensity of the light were systematically investigated. Optimal conditions included a solution buffered at pH 6.0, cross-linked plastocyanin, rebuilt spinach PS I, and the use of 1,4-benzenedithiol to connect PS I to the Pt nanoparticle. Illumination of this optimized Photosystem I/dithiol molecular wire/nanoparticle bioconjugate at a light intensity of 70 μE m-2 s-1 generated a measured one time H2 production rate of 312 μmol H2 mg Chl-1 h-1.",
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Maximizing H2 production in Photosystem I/dithiol molecular wire/platinum nanoparticle bioconjugates. / Grimme, Rebecca Ann; Lubner, Carolyn Elizabeth; Golbeck, John H.

In: Dalton Transactions, No. 45, 31.12.2009, p. 10106-10113.

Research output: Contribution to journalArticle

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