Raman Spectroscopy Applied to Monitor ...
Document type :
Article dans une revue scientifique: Article original
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Title :
Raman Spectroscopy Applied to Monitor Furfural Liquid-Phase Oxidation Catalyzed by Supported Gold Nanoparticles
Author(s) :
Thuriot-Roukos, Joëlle [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Khadraoui, Romaissa [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Paul, Sébastien [Auteur]
Centrale Lille
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Wojcieszak, Robert [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Khadraoui, Romaissa [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Paul, Sébastien [Auteur]

Centrale Lille
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Wojcieszak, Robert [Auteur]

Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Journal title :
ACS Omega
Abbreviated title :
ACS Omega
Volume number :
5
Pages :
14283-14290
Publisher :
American Chemical Society (ACS)
Publication date :
2020-06-09
HAL domain(s) :
Chimie/Catalyse
English abstract : [en]
In this paper, Raman spectroscopy is used as a tool to study the mechanism of furfural oxidation using H2O2 as a reagent on gold nanoparticles (NPs) supported on hydrotalcites (HTs). This reaction was repeated, under the ...
Show more >In this paper, Raman spectroscopy is used as a tool to study the mechanism of furfural oxidation using H2O2 as a reagent on gold nanoparticles (NPs) supported on hydrotalcites (HTs). This reaction was repeated, under the same conditions, but with different reaction times in a parallel multireactor system. The reaction media were analyzed using a macro device associated with a multipass cell permitting us to enhance the Raman signal by reflecting the laser beam 3 times. The Raman spectra showed the conversion of furfural to furoic acid without any chemical intermediates, thus privileging a direct pathway. Combining the results of the catalytic tests with those of the Raman study, the mechanism of furfural oxidation to furoic acid using gold NPs supported on HTs is proposed. The key points of this mechanism were found to be as follows: (i) the in situ formation of a base, originating from the Mg leaching from the HT support, initiates the oxidation of furfural by deprotonation; (ii) H2O2 used as a reagent in the solution increases the catalytic activity by its dissociation to form hydroxide ions; and (iii) the oxidation of furfural occurs on the surface of gold NPs and leads to higher furoic acid yield.Show less >
Show more >In this paper, Raman spectroscopy is used as a tool to study the mechanism of furfural oxidation using H2O2 as a reagent on gold nanoparticles (NPs) supported on hydrotalcites (HTs). This reaction was repeated, under the same conditions, but with different reaction times in a parallel multireactor system. The reaction media were analyzed using a macro device associated with a multipass cell permitting us to enhance the Raman signal by reflecting the laser beam 3 times. The Raman spectra showed the conversion of furfural to furoic acid without any chemical intermediates, thus privileging a direct pathway. Combining the results of the catalytic tests with those of the Raman study, the mechanism of furfural oxidation to furoic acid using gold NPs supported on HTs is proposed. The key points of this mechanism were found to be as follows: (i) the in situ formation of a base, originating from the Mg leaching from the HT support, initiates the oxidation of furfural by deprotonation; (ii) H2O2 used as a reagent in the solution increases the catalytic activity by its dissociation to form hydroxide ions; and (iii) the oxidation of furfural occurs on the surface of gold NPs and leads to higher furoic acid yield.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Administrative institution(s) :
Université de Lille
CNRS
Centrale Lille
ENSCL
Univ. Artois
CNRS
Centrale Lille
ENSCL
Univ. Artois
Collections :
Research team(s) :
Valorisation des alcanes et de la biomasse (VAALBIO)
Submission date :
2020-11-25T12:12:14Z
2020-11-25T18:31:05Z
2020-11-25T18:31:05Z
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