p-CuO films and photoelectrochemical corrosion
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F22%3A00559109" target="_blank" >RIV/61388955:_____/22:00559109 - isvavai.cz</a>
Alternative codes found
RIV/60461373:22310/22:43924755
Result on the web
<a href="https://hdl.handle.net/11104/0332530" target="_blank" >https://hdl.handle.net/11104/0332530</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jelechem.2022.116555" target="_blank" >10.1016/j.jelechem.2022.116555</a>
Alternative languages
Result language
angličtina
Original language name
p-CuO films and photoelectrochemical corrosion
Original language description
CuO films on transparent, conductive substrates (fluorine doped tin oxide, FTO), obtained by spray pyrolysis, were analyzed photoelectrochemically in neutral and alkaline solutions. The photoresponse was typical for a p-type semiconductor in a junction with an electrolyte. In absence of an electron scavenger in solution, cathodic photocurrents decayed rapidly (within minutes). This is ascribed to photogenerated conduction band electron initiated reduction of the electrode material to Cu2O. Such films could be reactivated by annealing in air, which resulted in the reconstruction of the CuO phase and complete recovery of photocurrents. Reducible species (methylviologen, ferricyanide, oxygen) were added to the electrolyte in order to compete with the photoelectrochemical auto-reduction of the semiconducting layer. In the case of O2 as scavenger, formation of a product in solution, H2O2, was observed, although with a Faradaic efficiency of only 2 percent. In all cases, only minor long-term stabilization was achieved. This was because sufficiently high concentrations of electron scavengers could not be used when high cathodic dark currents were developed (case of ferricyanide), or when the solubility was limited (case of oxygen). In addition, reduction of the semiconductor by the reduced photoactive species (case of methylviologen) can occur.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
Result continuities
Project
<a href="/en/project/GA20-11635S" target="_blank" >GA20-11635S: Advanced oxide based semiconductor photoelectrodes for solar energy conversion and water treatment</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Electroanalytical Chemistry
ISSN
1572-6657
e-ISSN
1873-2569
Volume of the periodical
919
Issue of the periodical within the volume
AUG 2022
Country of publishing house
CH - SWITZERLAND
Number of pages
7
Pages from-to
116555
UT code for WoS article
000829293100012
EID of the result in the Scopus database
2-s2.0-85132955120