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Polymeric viologen-...
Polymeric viologen-based electron transfer mediator for improving the photoelectrochemical water splitting on Sb2Se3 photocathode
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Liu, C. (author)
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Li, F. (author)
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Wang, L. (author)
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Li, Z. (author)
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Zhao, Y. (author)
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Li, Y. (author)
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Li, W. (author)
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Zhao, Z. (author)
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Fan, K. (author)
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- Sun, Licheng, 1962- (author)
- KTH,Organisk kemi,State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Centre on Molecular Devices, Institute for Energy Science and Technology, Dalian University of Technology, 116024, Dalian, China ; Center of Artificial Photosynthesis for Solar Fuels, School of Science, Westlake University, 310024, Hangzhou, China
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(creator_code:org_t)
- Elsevier BV, 2024
- 2024
- English.
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In: Fundamental Research. - : Elsevier BV. - 2667-3258. ; 4:2, s. 291-299
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- The photogenerated charge carrier separation and transportation of inside photocathodes can greatly influence the performance of photoelectrochemical (PEC) H2 production devices. Coupling TiO2 with p-type semiconductors to construct heterojunction structures is one of the most widely used strategies to facilitate charge separation and transportation. However, the band position of TiO2 could not perfectly match with all p-type semiconductors. Here, taking antimony selenide (Sb2Se3) as an example, a rational strategy was developed by introducing a viologen electron transfer mediator (ETM) containing polymeric film (poly-1,1′-dially-[4,4′-bipyridine]-1,1′-diium, denoted as PV2+) at the interface between Sb2Se3 and TiO2 to regulate the energy band alignment, which could inhibit the recombination of photogenerated charge carriers of interfaces. With Pt as a catalyst, the constructed Sb2Se3/PV2+/TiO2/Pt photocathode showed a superior PEC hydrogen generation activity with a photocurrent density of −18.6 mA cm−2 vs. a reversible hydrogen electrode (RHE) and a half-cell solar-to-hydrogen efficiency (HC-STH) of 1.54% at 0.17 V vs. RHE, which was much better than that of the related Sb2Se3/TiO2/Pt photocathode without PV2+ (−9.8 mA cm−2, 0.51% at 0.10 V vs. RHE).
Subject headings
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Keyword
- Electron transfer mediator
- Hydrogen evolution reaction
- Sb2Se3 photocathode
- Solar water splitting
- Viologen
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Liu, C.
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Li, F.
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Wang, L.
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Li, Z.
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Zhao, Y.
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Li, Y.
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Li, W.
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Zhao, Z.
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Fan, K.
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Sun, Licheng, 19 ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Physical Chemist ...
- Articles in the publication
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Fundamental Rese ...
- By the university
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Royal Institute of Technology