期刊
NANO ENERGY
卷 24, 期 -, 页码 10-16出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2016.03.022
关键词
Water splitting; Cuprous oxide; Tin dioxide; Stability; Protective layer
类别
资金
- FCT [SFRH/BD/79207/2011, SFRH/BPD/82010/2011]
- project BI-DSC - European Research Council [321315]
- PECHouse project (Swiss Federal Office for Energy) [SI/500090-02]
- Siemens AG
- University of South Carolina
- FEDER [NORTE-070124-FEDER-000070]
- CCDRN
- Fundação para a Ciência e a Tecnologia [SFRH/BD/79207/2011] Funding Source: FCT
For a sustainable future, efficient solar energy harvesting and storage is required. Solar hydrogen production from photoelectrochemical water splitting is a promising technology and, in particular, cuprous oxide photocathodes are interesting photoelectrodes due to their high efficiency and low cost. However, chemical instability inhibits practical application of such devices. This work reports a novel strategy for protecting cuprous oxide from photocorrosion, wherein a thin SnO2 overlayer enables increased stability over previous reports utilizing TiO2 protective layers. Performance and stability are influenced by the film thickness, post-deposition steam treatment, and the nature of the heterojunction interface. Stability over 57 h of sustained photoelectrochemical water reduction, maintaining 90% of initial photocurrent, is achieved. (C) 2016 Elsevier Ltd. All rights reserved.
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