Article (Scientific journals)
In situ generation of highly active sites by chemical vapor deposition of C2H4 over the LaMn0.7Co0.3O3 perovskite for the oxygen reduction reaction
Flores-Lasluisa, Jhony Xavier; Carré, Bryan; Caucheteux, Joachim et al.
2025 • In Journal of Materials Science, 60 (37), p. 16825 - 16847
Peer Reviewed verified by ORBi
 

Files


Full Text
Flores_JMaterSci_2025.pdf
Author postprint (1.32 MB)
Download
Annexes
Supporting.docx
(1.98 MB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Carbon material; Chemical vapor deposition process; Metal-oxide; Oxygen reduction reaction
Abstract :
[en] The LaMn0.7Co0.3O3 perovskite was used as a substrate to deposit carbon via Chemical Vapor Deposition (CVD) to form composites active for the oxygen reduction reaction (ORR). The presence of carbon material is important to improve the electrical conductivity of the metal oxide. The composites were characterized by different physicochemical methods. During the CVD process and regardless of the time of carbon deposition, the perovskite structure is decomposed into other crystallite structures including MnO, Co, La2O3 and La(OH)3. In addition, carbon nanotubes are formed over the metal oxides due to the presence of cobalt in the perovskite, especially after 20 min of CVD carbon deposition. The electrocatalytic activity towards ORR was assessed using a rotating ring-disk electrode in an alkaline liquid medium. The strong interactions between the carbon material and the metal-based compounds through C–O–M covalent bonds, which are highly active sites for ORR, considerably improve the catalytic performance. Moreover, new crystal phases are formed, which lead to the formation of the MnO/Co heterointerfaces that are also important sites for ORR. However, it was demonstrated that the presence of lanthanum-based compounds limits the number of active sites available for the ORR due to La segregation on the surface of the samples. Finally, the presence of carbon defects in the carbon nanotubes, especially the edge sites, can also produce a synergistic effect with the other active sites, enhancing the overall ORR reaction.
Disciplines :
Chemical engineering
Author, co-author :
Flores-Lasluisa, Jhony Xavier;  Department of Chemical Engineering - NCE (Nanomaterials, Catalysis, Electrochemistry), University of Liège, Liège, Belgium
Carré, Bryan  ;  Université de Liège - ULiège > Chemical engineering
Caucheteux, Joachim  ;  Université de Liège - ULiège > Chemical engineering
Léonard, Alexandre  ;  Université de Liège - ULiège > Chemical engineering
Job, Nathalie  ;  Université de Liège - ULiège > Department of Chemical Engineering > Ingéniérie électrochimique : matériaux et procédés pour la transformation et le stockage d'énergie
Language :
English
Title :
In situ generation of highly active sites by chemical vapor deposition of C2H4 over the LaMn0.7Co0.3O3 perovskite for the oxygen reduction reaction
Publication date :
October 2025
Journal title :
Journal of Materials Science
ISSN :
0022-2461
eISSN :
1573-4803
Publisher :
Springer
Volume :
60
Issue :
37
Pages :
16825 - 16847
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
ULiège - Université de Liège
SPF Economie - Service Public Fédéral Économie, PME, Classes moyennes et Énergie
Fonds de Bay
Funding text :
IPD-STEMA2022 post-doctoral grant. Belgian Energy Transition Funds (ETF) 2021- BE-HyFE project. Fonds Speciaux pour la Recherche FSR, Fonds de Bay
Available on ORBi :
since 02 August 2026

Statistics


Number of views
52 (0 by ULiège)
Number of downloads
45 (0 by ULiège)

Scopus citations®
 
1
Scopus citations®
without self-citations
1
OpenAlex citations
 
1

Bibliography


Similar publications



Contact ORBi