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Wiring of Photosystem I and Hydrogenase on an Electrode for Photoelectrochemical H2 Production by using Redox Polymers for Relatively Positive Onset Potential

Tapia, Cristina (author)
CSIC Instituto de Catálisis y Petroleoquímica (ICP)
Milton, Ross D. (author)
National University of Ireland Galway,University of Utah
Pankratova, Galina (author)
Lund University,Lunds universitet,Biokemi och Strukturbiologi,Centrum för Molekylär Proteinvetenskap,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Biochemistry and Structural Biology,Center for Molecular Protein Science,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
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Minteer, Shelley D. (author)
University of Utah
Åkerlund, Hans Erik (author)
Lund University,Lunds universitet,Biokemi och Strukturbiologi,Centrum för Molekylär Proteinvetenskap,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Biochemistry and Structural Biology,Center for Molecular Protein Science,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
Leech, Dónal (author)
National University of Ireland Galway
De Lacey, Antonio L. (author)
CSIC Instituto de Catálisis y Petroleoquímica (ICP)
Pita, Marcos (author)
CSIC Instituto de Catálisis y Petroleoquímica (ICP)
Gorton, Lo (author)
Lund University,Lunds universitet,Biokemi och Strukturbiologi,Centrum för Molekylär Proteinvetenskap,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Biochemistry and Structural Biology,Center for Molecular Protein Science,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
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 (creator_code:org_t)
2016-09-28
2017
English 6 s.
In: ChemElectroChem. - : Wiley. - 2196-0216. ; 4:1, s. 90-95
Related links:
http://dx.doi.org/10...
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https://lup.lub.lu.s...
https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Photosystem I (PSI) is combined with Desulfovibrio gigas hydrogenase for the bioelectrocatalytic photosynthesis of hydrogen at an electrode surface. The activity of these two biocatalysts is linked by two redox polymers; a redox polymer with a relatively positive potential (loaded with an Os complex) is able to reduce PSI and thus facilitates the production of photoexcited electrons, whereas redox polymers of relatively low potential are able to transfer electrons to the hydrogenase. Two negative-potential redox polymers are tested, with either a viologen pendant (4-methyl-4′-bromopropylviologen functionalized linear polyethylenimine) or a cobaltocene pendant (cobaltocene-functionalized branched polyethylenimine, Cc-BPEI). Both are able to protect hydrogenase from O2 inactivation, but only the use of Cc-BPEI yields significant photocurrents for H+ reduction, likely due to its lower redox potential. The photocurrents obtained are found to be proportional to the quantity of H2 produced, reaching a maximum of −30 μA cm−2 for the system incorporating Cc-BPEI and showing a relatively positive onset potential at +0.38 V versus SHE.

Subject headings

NATURVETENSKAP  -- Biologi -- Biokemi och molekylärbiologi (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences -- Biochemistry and Molecular Biology (hsv//eng)

Keyword

biocatalysis
enzymes
hydrogen
photosynthesis
polymers

Publication and Content Type

art (subject category)
ref (subject category)

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