Unassisted Switchable Dual‐Photoelectrode Devices Utilizing p‐n Carbon Quantum Dots as “Semiconductor Electrolytes”: Optimization Between H 2 O 2 and Solar Electricity Production Article Swipe
Huimin Duan
,
Chenguang Li
,
Liu‐Meng Mo
,
Jingshuang Dang
,
Xiaohui Jia
,
Jiacheng Yu
,
Y. Mei
,
Anders Thapper
,
Hongyan Wang
·
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.1002/advs.202417204
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.1002/advs.202417204
Switchable self‐driven photoelectrochemical (PEC) devices are developed to boost H 2 O 2 or electricity generation under visible‐light illumination, in which p‐n type carbon quantum dots (N‐CQDs) is applied as conceptually‐new “semiconductor electrolytes”. The N‐CQDs contains N‐dopants, and both negatively‐ and positively‐charged surface groups. This allows N‐CQDs to act as the electrolyte and to interact with both a BiVO 4 photoanode and a Cu 2 O photocathode. In a two‐compartment cell with a separating membrane, N‐CQDs can dynamically form p‐n heterojunctions with the photoanode or the photocathode, facilitating charge separation. In this setup, the fine‐tuned electronic structure of N‐CQDs promotes the two‐electron reactions with water or O 2 to produce H 2 O 2 , achieving a rate of 28 µ m min −1 and Faradic efficiency exceeding 80%. Switching into a one‐compartment cell, N‐CQDs promotes four‐electron charge transfer and stabilizes the photoelectrodes, giving electricity output for over 120 h. This control over electron transfer, selectivity, and durability cannot be achieved using traditional electrolytes.
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- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1002/advs.202417204
- https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/advs.202417204
- OA Status
- gold
- Cited By
- 2
- References
- 77
- Related Works
- 10
- OpenAlex ID
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https://openalex.org/W4410497678Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1002/advs.202417204Digital Object Identifier
- Title
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Unassisted Switchable Dual‐Photoelectrode Devices Utilizing p‐n Carbon Quantum Dots as “Semiconductor Electrolytes”: Optimization Between H 2 O 2 and Solar Electricity ProductionWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2025Year of publication
- Publication date
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2025-05-19Full publication date if available
- Authors
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Huimin Duan, Chenguang Li, Liu‐Meng Mo, Jingshuang Dang, Xiaohui Jia, Jiacheng Yu, Y. Mei, Anders Thapper, Hongyan WangList of authors in order
- Landing page
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https://doi.org/10.1002/advs.202417204Publisher landing page
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https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/advs.202417204Direct link to full text PDF
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YesWhether a free full text is available
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goldOpen access status per OpenAlex
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https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/advs.202417204Direct OA link when available
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Quantum dot, Semiconductor, Materials science, Electrolyte, Optoelectronics, Dual (grammatical number), Carbon fibers, Nanotechnology, Chemical engineering, Electrode, Chemistry, Engineering, Composite material, Physical chemistry, Literature, Composite number, ArtTop concepts (fields/topics) attached by OpenAlex
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2Total citation count in OpenAlex
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2025: 2Per-year citation counts (last 5 years)
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77Number of works referenced by this work
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10Other works algorithmically related by OpenAlex
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