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Nanofiber-supported...
Nanofiber-supported CuS nanoplatelets as high efficiency counter electrodes for quantum dot-based photoelectrochemical hydrogen production
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- Navarro-Pardo, F. (author)
- Centre for Energy, Materials and Telecommunications, Institut national de la recherche scientifique
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- Jin, L. (author)
- Centre for Energy, Materials and Telecommunications, Institut national de la recherche scientifique
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- Adhikari, Rajesh (author)
- Centre for Energy, Materials and Telecommunications, Institut National de la Recherche Scientifique
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- Tong, X. (author)
- Centre for Energy, Materials and Telecommunications, Institut National de la Recherche Scientifique, School of Chemistry and Material Science, Guizhou Normal University
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- Benetti, D. (author)
- Centre for Energy, Materials and Telecommunications, Institut National de la Recherche Scientifique
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- Basu, Kaustubh (author)
- Centre for Energy, Materials and Telecommunications, Institut National de la Recherche Scientifique
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- Vanka, S. (author)
- Department of Electrical and Computer Eng., McGill University
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- Zhao, H.G. (author)
- Centre for Energy, Materials and Telecommunications, Institut National de la Recherche Scientifique
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- Mi, Z.T. (author)
- Department of Electrical and Computer Eng., McGill University
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- Sun, S.H. (author)
- Centre for Energy, Materials and Telecommunications, Institut National de la Recherche Scientifique
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- Castaño, V.M. (author)
- Centre of Applied Physics and Advanced Technology, National Autonomous University of Mexico
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- Vomiero, Alberto (author)
- Luleå tekniska universitet,Materialvetenskap
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- Rosei, F. (author)
- Centre for Energy, Materials and Telecommunications, Institut National de la Recherche Scientifique, Institute for Fundamental and Frontier Science, University of Electronic Science and Technology of China
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(creator_code:org_t)
- Royal Society of Chemistry, 2017
- 2017
- English.
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In: Materials Chemistry Frontiers. - : Royal Society of Chemistry. - 2052-1537. ; 1:1, s. 65-72
- Related links:
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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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- We developed a hierarchically assembled hybrid counter electrode (CE) based on copper sulfide (CuS) nanoplatelets grown on polymer nanofibers. The resulting CE was used in a quantum dot (QD)-based photoelectrochemical (PEC) system for H2 generation in the presence of sacrificial agents (S2−/SO32−). The concept is to increase the specific surface area of the CE, aiming at maximizing charge exchange at the electrode, which boosts efficient generation of H2 and to obtain a stable structure for long-term operation of the device. Structural and morphological characterization indicated the presence of a covellite crystalline phase (CuS). PEC tests showed that the CuS nanoplatelets grown in the CEs could replace Pt CEs in either visible-active or near infrared (NIR)-active QD-based PEC systems. Specifically, saturation of the photocurrent density (∼7.5 mA cm−2) occurred at ∼0.6 V versus the RHE, when using a NIR QD-based TiO2 photoanode and a nanofiber-supported CuS as the CE. Stability tests of the nanofiber-supported CuS CE showed that 85% of the initial photocurrent density was maintained after ∼1 h, which is similar to that obtained with the Pt foil CE (86%). In contrast, CuS nanostructures directly deposited on FTO glass without nanofibers (CuS/FTO CE) exhibited poor stability. CuS/FTO CE degraded quickly, showing a 90% drop in the initial photocurrent within 200 s testing whereas a 14% drop in the initial photocurrent was observed for the CuxS on brass within 10 min of testing. Our new nanofiber supported-CuS CE stands out due to its higher performance compared to brass and its similar stability compared to Pt during long term PEC operation. Additionally, our hybrid CE showed a better catalytic performance than the Pt CE and good stability in cyclic voltammetry tests. These results demonstrate that the nanofiber-supported CuS is a promising cost effective alternative to Pt as a highly efficient CE for PEC H2 generation
Subject headings
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Keyword
- Experimentell fysik
- Experimental Physics
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Navarro-Pardo, F ...
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Jin, L.
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Adhikari, Rajesh
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Tong, X.
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Benetti, D.
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Basu, Kaustubh
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show more...
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Vanka, S.
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Zhao, H.G.
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Mi, Z.T.
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Sun, S.H.
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Castaño, V.M.
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Vomiero, Alberto
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Rosei, F.
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show less...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Other Physics To ...
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Materials Chemis ...
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Luleå University of Technology