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Autogenic electroly...
Autogenic electrolysis of water powered by solar and mechanical energy
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- Hu, Ya (författare)
- Uppsala universitet,Fasta tillståndets elektronik,Wuhan Univ Sci & Technol, Key Lab Hubei Prov Coal Convers & New Carbon Mat, Sch Chem & Chem Engn, Wuhan 430081, Peoples R China
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- Chen, Libo (författare)
- Uppsala universitet,Fasta tillståndets elektronik
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- Chai, Zhigang (författare)
- Uppsala universitet,Institutionen för kemi - Ångström
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- Zhu, Jiefang (författare)
- Uppsala universitet,Strukturkemi
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- Wang, Zhong Lin (författare)
- Uppsala universitet,Fasta tillståndets elektronik,Chinese Acad Sci, Beijing Inst Nanoenergy & Nanosyst, Beijing Key Lab Micronano Energy & Sensor, CAS Ctr Excellence Nanosci, Beijing 101400, Peoples R China; Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
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- Zhang, Shi-Li (författare)
- Uppsala universitet,Fasta tillståndets elektronik
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- Zhang, Zhi-Bin (författare)
- Uppsala universitet,Fasta tillståndets elektronik
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(creator_code:org_t)
- Elsevier, 2022
- 2022
- Engelska.
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Ingår i: Nano Energy. - : Elsevier. - 2211-2855 .- 2211-3282. ; 91
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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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
Ämnesord
Stäng
- A dual-bandgap photoelectrochemical (PEC) cell with two semiconductors stacked in tandem is a widely adopted concept to capture a large fraction of the solar spectrum for water splitting. While two photons are theoretically needed to produce one H2 molecule using single-bandgap PEC cells, four photons are generally required for one H2 molecule in the dual-bandgap cells because of an unavoidable charge recombination at the solid-solid interface. Here, triboelectric effects are exploited in the form of triboelectric nanogenerator (TENG) to allow for the generation of one H2 molecule at the expenses of two photons in a dual-bandgap device using an array of core/shell p-type silicon/anatase-TiO2 nanowires as photoelectrode. The TENG, that converts mechanical energy to electricity, efficiently suppresses the charge recombination at the interface and significantly increases the energy of the photo-generated carriers required for the simultaneous water reduction and oxidation. The synergy of photoexcitation and triboelectrics results in a rate of hydrogen production in a neutral Na2SO4 electrolyte around 150 times higher than that of the counterpart, i.e., the device in the absence of TENG. Furthermore, the TENG-induced enhancement in the PEC water splitting remains substantial even when the solar power density is reduced to 20 mW/cm2.
Ämnesord
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Nyckelord
- Photoelectrochemical cells
- TENG
- Water splitting
- Nanowires
- Hydrogen
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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