Thermal sulfidation of alpha-Fe2O3 hematite to FeS2 pyrite thin electrodes: Correlation between surface morphology and photoelectrochemical functionality

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F18%3A00492863" target="_blank" >RIV/68378271:_____/18:00492863 - isvavai.cz</a>
Alternative codes found
RIV/61989592:15310/18:73587959
Result on the web
<a href="http://dx.doi.org/10.1016/j.cattod.2017.11.004" target="_blank" >http://dx.doi.org/10.1016/j.cattod.2017.11.004</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.cattod.2017.11.004" target="_blank" >10.1016/j.cattod.2017.11.004</a>

Result language
angličtina
Original language name
Thermal sulfidation of alpha-Fe2O3 hematite to FeS2 pyrite thin electrodes: Correlation between surface morphology and photoelectrochemical functionality
Original language description
We studied for the first time the correlation between photoelectrochemical (PEC) functionality of hematite films and after their sulfidation into pyrite. The highest PEC activity of hematite films of 560 uA cm−2 at 700 mV vs. Ag/AgCl was achieved with the HiPIMS photoelectrodes. The photoefficiency dropped dramatically to 4 uA cm−2 at 600 mV vs. Ag/AgCl after the sulfidation. A significant increase of grains‘ size, residual unreacted hematite, surface defects were the main reasons for the poor photoactivity. The sol-gel produced hematite yielded photocurrent of 30 uA cm−2 and a slight increase to 40 μA cm−2 (recorded at 500 mV vs. Ag/AgCl) of the corresponding pyrite version. Both these electrodes showed also similar morphological characteristics. The structural, electronic and optical properties of the deposited films were determined using various methods e.g. Raman spectroscopy, SEM, and PDS.
Czech name
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Czech description
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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
10305 - Fluids and plasma physics (including surface physics)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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