Fe2O3 photoanodes: Photocorrosion protection by thin SnO2 and TiO2 films

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F21%3A43922857" target="_blank" >RIV/60461373:22310/21:43922857 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388955:_____/21:00542520

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1572665721003088?via%3Dihub#gp010" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1572665721003088?via%3Dihub#gp010</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jelechem.2021.115282" target="_blank" >10.1016/j.jelechem.2021.115282</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Fe2O3 photoanodes: Photocorrosion protection by thin SnO2 and TiO2 films

Popis výsledku v původním jazyce

The possibility of protection of Fe2O3 (hematite) against photocorrosion in aqueous electrolytes by thin layers of TiO2 and SnO2 deposited by ALD (atomic layer deposition), was investigated. Sn-doped hematite layers, as obtained in this study by aerosol pyrolysis had significant roughness and porosity. ALD is very successful in applying conformal films to such structures. The nominal coverage by ALD films was varied between 0.5 and 7.5 nm. The presence of the TiO2 and SnO2 films was evidenced by XPS. Photocurrents were strongly diminished as the capping layer thickness was increased. The Faradaic efficiency, f, of photocorrosion in acidic media (0.01 M H2SO4) was decreased from 0.026 to 0.014 and to 0.010 by capping with either a 2 nm thick overlayer of TiO2 or of SnO2, respectively. The latter had also a positive influence on the long term photocurrent stability. © 2021 Elsevier B.V.

Název v anglickém jazyce

Fe2O3 photoanodes: Photocorrosion protection by thin SnO2 and TiO2 films

Popis výsledku anglicky

The possibility of protection of Fe2O3 (hematite) against photocorrosion in aqueous electrolytes by thin layers of TiO2 and SnO2 deposited by ALD (atomic layer deposition), was investigated. Sn-doped hematite layers, as obtained in this study by aerosol pyrolysis had significant roughness and porosity. ALD is very successful in applying conformal films to such structures. The nominal coverage by ALD films was varied between 0.5 and 7.5 nm. The presence of the TiO2 and SnO2 films was evidenced by XPS. Photocurrents were strongly diminished as the capping layer thickness was increased. The Faradaic efficiency, f, of photocorrosion in acidic media (0.01 M H2SO4) was decreased from 0.026 to 0.014 and to 0.010 by capping with either a 2 nm thick overlayer of TiO2 or of SnO2, respectively. The latter had also a positive influence on the long term photocurrent stability. © 2021 Elsevier B.V.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

JOURNAL OF ELECTROANALYTICAL CHEMISTRY

ISSN

1572-6657

e-ISSN

—

Svazek periodika

892

Číslo periodika v rámci svazku

1 July 2021

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

—

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85105249490