Photoelectrochemical, photocatalytic and electrocatalytic behavior of titania films modified by nitrogen and platinum species

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F21%3A10246778" target="_blank" >RIV/61989100:27710/21:10246778 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/article/10.1007/s13204-021-01690-1#citeas" target="_blank" >https://link.springer.com/article/10.1007/s13204-021-01690-1#citeas</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s13204-021-01690-1" target="_blank" >10.1007/s13204-021-01690-1</a>

Result language

angličtina

Original language name

Photoelectrochemical, photocatalytic and electrocatalytic behavior of titania films modified by nitrogen and platinum species

Original language description

Co-doping of titania by N and Pt species was employed to tune the electronic structure and enhance the electrocatalytic and photocatalytic activity of the films. Herein, the different approaches of synthesis procedure of Pt- and Pt,N-TiO2 films were used to investigate their effect on the platinum oxidation states. The resulting different species of Pt led to the changes in the electronic structure of TiO2, with consequent bandgap narrowing, anodic shift of the flat band potential, and cathodic shift of the valence band The quantum yield efficiency was correlated with Pt0 atomic content and the relative atomic content of Ptn+-O-Ti fragments, whereas its decrease for some samples can be caused by the presence of N and Ptn+. The highest response for N2O photocatalytic decomposition was observed over Pt,N-TiO2 films. The presence of metal and non-metal species in TiO2 structure resulted in synergistic effect including (1) inhibition of recombination of the electrons and holes and (2) narrowing of the bandgap. Electrocatalytic properties in hydrogen and oxygen evolution reactions were improved by Pt doping. The formed Pt2+-O-Ti bonds rather than Pt nanoparticles are suggested to be responsible for the highest electrocatalytic activity. The additional UV exposure of the electrodes led to Pt NPs aggregation as a result of photodeposition of Pt ions. The mechanism of the Pt2+ photoreduction in TiO2 structure is proposed.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10400 - Chemical sciences

Project

<a href="/en/project/EF16_019%2F0000853" target="_blank" >EF16_019/0000853: Institute of Environmental Technology - Excellent Research</a><br>

Continuities

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

Publication year

2021

Confidentiality

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

Name of the periodical

Applied Nanoscience

ISSN

2190-5509

e-ISSN

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Volume of the periodical

neuveden

Issue of the periodical within the volume

February

Country of publishing house

CH - SWITZERLAND

Number of pages

13

Pages from-to

1-13

UT code for WoS article

000616042300001

EID of the result in the Scopus database

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