DOI: 10.1073/pnas.77.11.6280. Synthesis and characterization of a photosensitive interface for hydrogen generation: Chemically modified p-type semiconducting silicon photocathodes

Synthesis and characterization of a photosensitive interface for hydrogen generation: Chemically modified p-type semiconducting silicon photocathodes

10.1073/pnas.77.11.6280

Crossref journal-article

Proceedings of the National Academy of Sciences

Proceedings of the National Academy of Sciences (341)

Abstract

p-Si photocathodes functionalized first with an N,N ′-dialkyl-4,4′-bipyridinium redox reagent, (PQ 2+/+- ) surf , and then with a Pt precursor, PtCl 6 2- , give significant efficiency (up to 5%) for photoelectrochemical H 2 generation with 632.8-nm light. Naked p-Si photocathodes give nearly zero efficiency, owing to poor H 2 evolution kinetics that are improved by the (PQ 2+/+- ) surf /Pt modification. The mechanism of H 2 evolution from p-Si/(PQ 2+/+- ) surf /Pt is first photoexcitation of electrons to the conduction band of Si followed by (PQ 2+ ) surf → (PQ +- ) surf reduction. The dispersion of Pt then catalyzes H 2 O reduction to give H 2 and regeneration of (PQ 2+ ) surf . The overall energy conversion efficiency rivals the best direct optical to chemical conversion systems reported to date.

Bibliography

Bookbinder, D. C., Bruce, J. A., Dominey, R. N., Lewis, N. S., & Wrighton, M. S. (1980). Synthesis and characterization of a photosensitive interface for hydrogen generation: Chemically modified p-type semiconducting silicon photocathodes. Proceedings of the National Academy of Sciences, 77(11), 6280â6284.

Authors 5

Dana C. Bookbinder (first)
James A. Bruce (additional)
Raymond N. Dominey (additional)
Nathan S. Lewis (additional)
Mark S. Wrighton (additional)

References 0 Referenced 70

None

Dates

Type	When
Created	19 years, 2 months ago (May 31, 2006, 4:08 a.m.)
Deposited	3 years, 4 months ago (April 13, 2022, 11:39 a.m.)
Indexed	4 months, 1 week ago (April 14, 2025, 11:27 a.m.)
Issued	44 years, 9 months ago (Nov. 1, 1980)
Published	44 years, 9 months ago (Nov. 1, 1980)
Published Online	44 years, 9 months ago (Nov. 1, 1980)
Published Print	44 years, 9 months ago (Nov. 1, 1980)

Funders 0

None

BibTeX

@article{Bookbinder_1980, title={Synthesis and characterization of a photosensitive interface for hydrogen generation: Chemically modified p-type semiconducting silicon photocathodes}, volume={77}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.77.11.6280}, DOI={10.1073/pnas.77.11.6280}, number={11}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Bookbinder, Dana C. and Bruce, James A. and Dominey, Raymond N. and Lewis, Nathan S. and Wrighton, Mark S.}, year={1980}, month=nov, pages={6280–6284} }

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  "abstract": "<jats:p>\n            p-Si photocathodes functionalized first with an\n            <jats:italic>N,N</jats:italic>\n            \u2032-dialkyl-4,4\u2032-bipyridinium redox reagent, (PQ\n            <jats:sup>2+/+-</jats:sup>\n            )\n            <jats:sub>surf</jats:sub>\n            , and then with a Pt precursor, PtCl\n            <jats:sub>6</jats:sub>\n            <jats:sup>2-</jats:sup>\n            , give significant efficiency (up to 5%) for photoelectrochemical H\n            <jats:sub>2</jats:sub>\n            generation with 632.8-nm light. Naked p-Si photocathodes give nearly zero efficiency, owing to poor H\n            <jats:sub>2</jats:sub>\n            evolution kinetics that are improved by the (PQ\n            <jats:sup>2+/+-</jats:sup>\n            )\n            <jats:sub>surf</jats:sub>\n            /Pt modification. The mechanism of H\n            <jats:sub>2</jats:sub>\n            evolution from p-Si/(PQ\n            <jats:sup>2+/+-</jats:sup>\n            )\n            <jats:sub>surf</jats:sub>\n            /Pt is first photoexcitation of electrons to the conduction band of Si followed by (PQ\n            <jats:sup>2+</jats:sup>\n            )\n            <jats:sub>surf</jats:sub>\n            \u2192 (PQ\n            <jats:sup>+-</jats:sup>\n            )\n            <jats:sub>surf</jats:sub>\n            reduction. The dispersion of Pt then catalyzes H\n            <jats:sub>2</jats:sub>\n            O reduction to give H\n            <jats:sub>2</jats:sub>\n            and regeneration of (PQ\n            <jats:sup>2+</jats:sup>\n            )\n            <jats:sub>surf</jats:sub>\n            . The overall energy conversion efficiency rivals the best direct optical to chemical conversion systems reported to date.\n          </jats:p>",
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