Photo-electrochemical activity and selectivity of nanocrystalline BaTiO3 electrodes in water oxidation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F21%3A00533063" target="_blank" >RIV/61388955:_____/21:00533063 - isvavai.cz</a>

Result on the web

<a href="http://hdl.handle.net/11104/0311558" target="_blank" >http://hdl.handle.net/11104/0311558</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/elsa.202000005" target="_blank" >10.1002/elsa.202000005</a>

Result language

angličtina

Original language name

Photo-electrochemical activity and selectivity of nanocrystalline BaTiO3 electrodes in water oxidation

Original language description

Nanocrystalline BaTiO3 photocatalysts were prepared by spray-freeze/freezedryingnprocedure in presence of structure directing gelatin. The syntheticnapproach yields materials with particle sizes ranging between 20 and 60 nmnconforming to cubic perovskite structure. Regardless of the structural differences,nthe materials show particle size independent bandgap energy of ca.n3.27 eV. All prepared materials are photo-electrochemically active in water oxidationnwith intrinsic activity decreasing with decreasing particle size. The photoelectrochemicalnactivity of BaTiO3 in water oxidation is pH dependent with thenhole charge transfer processes being significantly suppressed in alkaline media.nSuch a behavior can be ascribed to deprotonation of surface OH groups encounterednin alkaline media that promotes surface state catalyzed electron transfernreactions at the illuminated BaTiO3 surface. The barium titanate shows the abilitynto oxidize water with formation of oxygen and ozone. The ozone formation isnpronounced on large nanocrystals particularly in acid media. No ozone formationnwas observed in alkaline solutions.

Czech name

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Czech description

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Type

J_ost - Miscellaneous article in a specialist periodical

CEP classification

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OECD FORD branch

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

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

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

Name of the periodical

Electrochemical Science Advances

ISSN

2698-5977

e-ISSN

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Volume of the periodical

1

Issue of the periodical within the volume

2

Country of publishing house

DE - GERMANY

Number of pages

12

Pages from-to

e2000005

UT code for WoS article

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EID of the result in the Scopus database

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