Bromine generation on various photoanodes: α-Fe2O3, Fe2TiO5, WO3 and TiO2

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F24%3A43928124" target="_blank" >RIV/60461373:22310/24:43928124 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0920586124001214?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0920586124001214?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cattod.2024.114627" target="_blank" >10.1016/j.cattod.2024.114627</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Bromine generation on various photoanodes: α-Fe2O3, Fe2TiO5, WO3 and TiO2

Popis výsledku v původním jazyce

The competitive photoelectrochemical reactions bromide vs. water (photo)oxidation in an acidic medium (pH = 1.7) were studied on four semiconducting oxides viz. hematite (α-Fe2O3), pseudobrookite (Fe2TiO5), tungsten trioxide (WO3) and titanium dioxide (TiO2). The experiments were carried out with thin film electrodes on conductive substrates (FTO/glass) in a vigorously stirred batch reactor under AM1.5 irradiation. Electrical bias was applied to the electrodes, exclusively promoting valence band processes that lead to the oxidative pathways. The initial Faradaic efficiency (FE0) for bromine generation was determined by chemical analysis (UV-Vis absorbance) of the electrolytes.The semiconducting materials used as photoanodes showed a similar ability to oxidize bromide to bromine. For 0.02 M sodium bromide, a Faradaic efficiency of 100 % was obtained for α-Fe2O3, WO3 and TiO2, while the highest value for pseudobrookite was 90 %.From further analysis, as to competition kinetics, the ratio of the rate constants of water oxidation and bromide oxidation, vH2O / kox, was estimated. α-Fe2O3 was the most successful compound among the studied semiconductors.

Název v anglickém jazyce

Bromine generation on various photoanodes: α-Fe2O3, Fe2TiO5, WO3 and TiO2

Popis výsledku anglicky

The competitive photoelectrochemical reactions bromide vs. water (photo)oxidation in an acidic medium (pH = 1.7) were studied on four semiconducting oxides viz. hematite (α-Fe2O3), pseudobrookite (Fe2TiO5), tungsten trioxide (WO3) and titanium dioxide (TiO2). The experiments were carried out with thin film electrodes on conductive substrates (FTO/glass) in a vigorously stirred batch reactor under AM1.5 irradiation. Electrical bias was applied to the electrodes, exclusively promoting valence band processes that lead to the oxidative pathways. The initial Faradaic efficiency (FE0) for bromine generation was determined by chemical analysis (UV-Vis absorbance) of the electrolytes.The semiconducting materials used as photoanodes showed a similar ability to oxidize bromide to bromine. For 0.02 M sodium bromide, a Faradaic efficiency of 100 % was obtained for α-Fe2O3, WO3 and TiO2, while the highest value for pseudobrookite was 90 %.From further analysis, as to competition kinetics, the ratio of the rate constants of water oxidation and bromide oxidation, vH2O / kox, was estimated. α-Fe2O3 was the most successful compound among the studied semiconductors.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

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

Projekt

<a href="/cs/project/GA23-05266S" target="_blank" >GA23-05266S: Studie klíčových faktorů ovlivňujících účinnost fotoelektrochemických cel využívající sluneční světlo pro syntézní reakce a čištění vod</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

CATALYSIS TODAY

ISSN

0920-5861

e-ISSN

1873-4308

Svazek periodika

432

Číslo periodika v rámci svazku

114627

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

"nestránkované"

Kód UT WoS článku

001206979300001

EID výsledku v databázi Scopus

2-s2.0-85187794630