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A nanostructured Ni...
A nanostructured NiO/cubic SiC p-n heterojunction photoanode for enhanced solar water splitting
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- Jian, Jingxin (författare)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten
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- Shi, Yuchen (författare)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten
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- Ekeroth, Sebastian, 1988- (författare)
- Linköpings universitet,Plasma och ytbeläggningsfysik,Tekniska fakulteten
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- Keraudy, Julien (författare)
- Oerlikon Balzers, Liechtenstein
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- Syväjärvi, Mikael (författare)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten
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- Yakimova, Rositsa (författare)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten
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- Helmersson, Ulf (författare)
- Linköpings universitet,Plasma och ytbeläggningsfysik,Tekniska fakulteten
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- Sun, Jianwu (författare)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten
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(creator_code:org_t)
- 2019
- 2019
- Engelska.
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Ingår i: Journal of Materials Chemistry A. - : ROYAL SOC CHEMISTRY. - 2050-7488 .- 2050-7496. ; 7:9, s. 4721-4728
- Relaterad länk:
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https://liu.diva-por... (primary) (Raw object)
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https://pubs.rsc.org...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Photoelectrochemical (PEC) water-splitting offers a promising method to convert the intermittent solar energy into renewable and storable chemical energy. However, the most studied semiconductors generally exhibit a poor PEC performance including low photocurrent, small photovoltage, and/or large onset potential. In this work, we demonstrate a significant enhancement of photovoltage and photocurrent together with a substantial decrease of onset potential by introducing electrocatalytic and p-type NiO nanoclusters on an n-type cubic silicon carbide (3C-SiC) photoanode. Under AM1.5G 100 mW cm(-2) illumination, the NiO-coated 3C-SiC photoanode exhibits a photocurrent density of 1.01 mA cm(-2) at 0.55 V versus reversible hydrogen electrode (V-RHE), a very low onset potential of 0.20 V-RHE and a high fill factor of 57% for PEC water splitting. Moreover, the 3C-SiC/NiO photoanode shows a high photovoltage of 1.0 V, which is the highest value among reported photovoltages. The faradaic efficiency measurements demonstrate that NiO also protects the 3C-SiC surface against photo-corrosion. The impedance measurements evidence that the 3C-SiC/NiO photoanode facilitates the charge transfer for water oxidation. The valence-band position measurements confirm the formation of the 3C-SiC/NiO p-n heterojunction, which promotes the separation of the photogenerated carriers and reduces carrier recombination, thus resulting in enhanced solar water-splitting.
Ämnesord
- NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)
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