Activation of alpha-Fe2O3 for Photoelectrochemical Water Splitting Strongly Enhanced by Low Temperature Annealing in Low Oxygen Containing Ambient
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F20%3A73601471" target="_blank" >RIV/61989592:15310/20:73601471 - isvavai.cz</a>
Result on the web
<a href="https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/chem.201904430" target="_blank" >https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/chem.201904430</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/chem.201904430" target="_blank" >10.1002/chem.201904430</a>
Alternative languages
Result language
angličtina
Original language name
Activation of alpha-Fe2O3 for Photoelectrochemical Water Splitting Strongly Enhanced by Low Temperature Annealing in Low Oxygen Containing Ambient
Original language description
Photoelectrochemical (PEC) water splitting is a promising method for the conversion of solar energy into chemical energy stored in the form of hydrogen. Nanostructured hematite (alpha-Fe2O3) is one of the most attractive materials for a highly efficient charge carrier generation and collection due to its large specific surface area and the short minority carrier diffusion length. In the present work, the PEC water splitting performance of nanostructured alpha-Fe2O3 is investigated which was prepared by anodization followed by annealing in a low oxygen ambient (0.03 % O-2 in Ar). It was found that low oxygen annealing can activate a significant PEC response of alpha-Fe2O3 even at a low temperature of 400 degrees C and provide an excellent PEC performance compared with classic air annealing. The photocurrent of the alpha-Fe2O3 annealed in the low oxygen at 1.5 V vs. RHE results as 0.5 mA cm(-2), being 20 times higher than that of annealing in air. The obtained results show that the alpha-Fe2O3 annealed in low oxygen contains beneficial defects and promotes the transport of holes; it can be attributed to the improvement of conductivity due to the introduction of suitable oxygen vacancies in the alpha-Fe2O3. Additionally, we demonstrate the photocurrent of alpha-Fe2O3 annealed in low oxygen ambient can be further enhanced by Zn-Co LDH, which is a co-catalyst of oxygen evolution reaction. This indicates low oxygen annealing generates a promising method to obtain an excellent PEC water splitting performance from alpha-Fe2O3 photoanodes.
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/EF15_003%2F0000416" target="_blank" >EF15_003/0000416: Advanced Hybrid Nanostructures for Renewable Energy Applications</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
CHEMISTRY-A EUROPEAN JOURNAL
ISSN
0947-6539
e-ISSN
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Volume of the periodical
26
Issue of the periodical within the volume
12
Country of publishing house
DE - GERMANY
Number of pages
8
Pages from-to
2685-2692
UT code for WoS article
000512441800001
EID of the result in the Scopus database
2-s2.0-85079443568