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Unassisted water splitting with 9.3% efficiency by a single quantum nanostructure photoelectrode
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, Faculty of Science & Engineering.
Univ Complutense Madrid, Spain.
Bahauddin Zakariya Univ, Pakistan.
South China Normal Univ, Peoples R China.
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2019 (English)In: International journal of hydrogen energy, ISSN 0360-3199, E-ISSN 1879-3487, Vol. 44, no 36, p. 19650-19657Article in journal (Refereed) Published
Abstract [en]

To split water and produce hydrogen by white light is an excellent solution for the storage and supply of clean and sustainable energy. Efficiency and stability are the key challenges for a successful exploitation. InGaN, evaluated against other semiconductors, metal oxides, carbon based - and organic materials has most suited intrinsic materials properties. Based on this optimum materials choice we report photoelectrochemical (PEC) hydrogen generation under white light illumination by an InGaN-based quantum nanostructure photoelectrode. No degradation occurs for operation over 10 h. Our novel concept, combining quantum nanostructure physics with electrochemistry and catalysis leads to almost 10% efficiency at zero external voltage. The efficiency rises above 25% at 0.2 V. This is unmatched for a single photoelectrode, representing the most advanced technology of low complexity. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2019. Vol. 44, no 36, p. 19650-19657
Keywords [en]
InN quantum dots; InGaN nanowalls; Photoelectrode; Unassisted; Water splitting; Hydrogen production
National Category
Energy Systems
Identifiers
URN: urn:nbn:se:liu:diva-159886DOI: 10.1016/j.ijhydene.2019.06.008ISI: 000478711300016OAI: oai:DiVA.org:liu-159886DiVA, id: diva2:1346149
Available from: 2019-08-27 Created: 2019-08-27 Last updated: 2019-08-27

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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  • vancouver
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  • Other style
More styles
Language
  • de-DE
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  • nn-NB
  • sv-SE
  • Other locale
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Output format
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