Photoelectrocatalytic activity of ...
Document type :
Article dans une revue scientifique: Article original
DOI :
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Title :
Photoelectrocatalytic activity of in(iii)-modified tio2 photoanodes in the visible spectrum region
Author(s) :
Grinberg, V. A. [Auteur]
Emets, V. V. [Auteur]
Maslov, D. A. [Auteur]
Tsodikov, M. V. [Auteur]
Mayorova, N. A. [Auteur]
Averin, A. A. [Auteur]
Fedotov, A. S. [Auteur]
Marinova, Maya [Auteur]
Institut Chevreul - FR2638
Simon, Pardis [Auteur]
Emets, V. V. [Auteur]
Maslov, D. A. [Auteur]
Tsodikov, M. V. [Auteur]
Mayorova, N. A. [Auteur]
Averin, A. A. [Auteur]
Fedotov, A. S. [Auteur]
Marinova, Maya [Auteur]
Institut Chevreul - FR2638
Simon, Pardis [Auteur]
Journal title :
New journal of chemistry = Nouveau journal de chimie
Abbreviated title :
New J. Chem.
Volume number :
44
Pages :
16200-16210
Publication date :
2020-08-26
ISSN :
1144-0546
HAL domain(s) :
Chimie/Catalyse
English abstract : [en]
Nanocrystalline film photoanodes of titanium dioxide modified with In(III) ions in the concentration range from 1.0 to 10 mass% (0.23 to 2.52 at%) are manufactured using the sol–gel method. Their physicochemical characteristics ...
Show more >Nanocrystalline film photoanodes of titanium dioxide modified with In(III) ions in the concentration range from 1.0 to 10 mass% (0.23 to 2.52 at%) are manufactured using the sol–gel method. Their physicochemical characteristics and the structure of In-containing compounds on the TiO2 surface are investigated via transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-vis absorption spectroscopy. The photoelectrocatalytic activity of these anodes in the reactions of methanol and formic acid electrooxidation studied under illumination with monochromatic light (369 and 461 nm; 7.5 and 10 mW cm−2, respectively) and visible light (a sunlight simulator; 100 mW cm−2) is shown to decrease symbatically with an increase in indium content. It is also shown that a selective photoelectrooxidation of methanol is observed for titanium dioxide modified with 0.23 at% In in a potential region of (−780 ÷ −550 mV). Using photocurrent modulation spectroscopy (IMPS), the recombination rate constants and the charge carrier transfer efficiency are determined under illumination of the modified photoanode with monochromatic light (369 nm; 7.5 mW cm−2) at a potential of −0.8 V in a solution of 0.1 M KOH containing methanol. It is demonstrated that the doping of titanium dioxide with 0.23 at% In promotes both an increase in the current of electron–hole pair generation and a decrease in recombination losses.Show less >
Show more >Nanocrystalline film photoanodes of titanium dioxide modified with In(III) ions in the concentration range from 1.0 to 10 mass% (0.23 to 2.52 at%) are manufactured using the sol–gel method. Their physicochemical characteristics and the structure of In-containing compounds on the TiO2 surface are investigated via transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-vis absorption spectroscopy. The photoelectrocatalytic activity of these anodes in the reactions of methanol and formic acid electrooxidation studied under illumination with monochromatic light (369 and 461 nm; 7.5 and 10 mW cm−2, respectively) and visible light (a sunlight simulator; 100 mW cm−2) is shown to decrease symbatically with an increase in indium content. It is also shown that a selective photoelectrooxidation of methanol is observed for titanium dioxide modified with 0.23 at% In in a potential region of (−780 ÷ −550 mV). Using photocurrent modulation spectroscopy (IMPS), the recombination rate constants and the charge carrier transfer efficiency are determined under illumination of the modified photoanode with monochromatic light (369 nm; 7.5 mW cm−2) at a potential of −0.8 V in a solution of 0.1 M KOH containing methanol. It is demonstrated that the doping of titanium dioxide with 0.23 at% In promotes both an increase in the current of electron–hole pair generation and a decrease in recombination losses.Show less >
Language :
Anglais
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille
Centrale Lille
ENSCL
Univ. Artois
Université de Lille
Collections :
Submission date :
2022-03-02T07:13:17Z