Hematite films by aerosol pyrolysis: Influence of substrate and photocorrosion suppression by TiOinf2/inf capping

0506502 - ÚFCH JH 2020 RIV NL eng J - Journal Article
Krýsa, J. - Imrich, T. - Paušová, Š. - Krýsová, Hana - Neumann-Spallart, M.
Hematite films by aerosol pyrolysis: Influence of substrate and photocorrosion suppression by TiOinf2/inf capping.
Catalysis Today. Roč. 335, JAN 2019 (2019), s. 418-422. ISSN 0920-5861. E-ISSN 1873-4308
R&D Projects: GA ČR GA17-20008S; GA MŠMT(CZ) EF16_013/0001821
Institutional support: RVO:61388955
Keywords : Aerosol pyrolysis * Photocorrosion * α-Fe2O3/TiO2 electrodes 2 3 2
OECD category: Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
Impact factor: 5.825, year: 2019
Method of publishing: Limited access

Sn-doped hematite (Fe2O3) films were prepared by aerosol pyrolysis (AP) on fluorine doped tin oxide (FTO), titanium and stainless steel. Photoactive electrodes were obtained in all cases and the photosensitivity had an onset around 650 nm. Maximum incident photon to electron conversion efficiency (IPCE) was 0.3 at 300 nm for samples deposited on FTO. The Faradaic efficiency of the photocorrosion reaction was found to be 0.47% for an unprotected FTO/hematite electrode in H2SO4. The Faradaic efficiency of this dissolution reaction decreased to 0.3% for a hematite electrode covered with a 65 nm thick dip coated layer of TiO2, and to 0.17% for a sample with a spray coated TiO2 layer, thus proving the beneficial role of TiO2 in protecting hematite against photocorrosion.
Permanent Link: http://hdl.handle.net/11104/0297735