Thermogravimetric insight in the reduction of xCuO – (1-x)MoO3 oxide system (0.1 ≤ x ≤ 0.9) by hydrogen

Jelić, Dijana; Zeljković, Saša; Jugović, Dragana; Mentus, Slavko

doi:10.1016/j.ijrmhm.2021.105480

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2021

Authors

Jelić, Dijana
Zeljković, Saša
Jugović, Dragana

Mentus, Slavko

Article (Accepted Version)

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Abstract

The oxide mixtures xCuO-(1-x) MoO3 were synthesized by gel-combustion procedure. The existence of phase mixture CuO + Cu3Mo2O9 and MoO3 + CuMoO4 in CuO-rich and MoO3 -rich composition region, respectively, were evidenced. The constant heating rate thermogravimetry in hydrogen atmosphere revealed that the reduction reactions proceed within the two clearly separated temperature regions. On the basis of mass changes, the mechanism of reduction processes was discussed. The measurements revealed considerable inhibition of CuO reduction by MoO3, and huge acceleration of MoO3 → MoO2 reduction step by copper. The particularities found in this system were commented in relation to our similar studies in NiO-MoO3 and CuO-WO3 systems. For particular composition, x = 0.5, existing preferably in form of a-CuMoO4, kinetic parameters of reduction were determined. The composition of oxide mixture influenced the particle size and morphology of resulting metallic Cu-Mo composites.

Keywords:

copper oxide / Cu-Mo composites / hydrogen / thermogravimetry / molybdenum oxide

Source:
International Journal of Refractory Metals and Hard Materials, 2021, 96, 105480-

Publisher:

Elsevier BV

Projects:

Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200146 (University of Belgrade, Faculty of Physical Chemistry) (RS-200146)
Serbian Academy of Sciences and Arts, Project F-190
Ministry for Scientific and Technological Development, Higher Education and Information Society of Republic of Srpska, project No. 19.032/961-78/19

Note:

This is the peer-reviewed manuscript of the article: Jelić, D., Zeljković, S., Jugović, D., Mentus, S., 2021. Thermogravimetric insight in the reduction of xCuO – (1-x)MoO3 oxide system (0.1 ≤ x ≤ 0.9) by hydrogen. International Journal of Refractory Metals and Hard Materials 96, 105480. https://doi.org/10.1016/j.ijrmhm.2021.105480

DOI: 10.1016/j.ijrmhm.2021.105480

ISSN: 0263-4368

TY  - JOUR
AU  - Jelić, Dijana
AU  - Zeljković, Saša
AU  - Jugović, Dragana
AU  - Mentus, Slavko
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/10534
AB  - The oxide mixtures xCuO-(1-x) MoO3 were synthesized by gel-combustion procedure. The existence of phase mixture CuO + Cu3Mo2O9 and MoO3 + CuMoO4 in CuO-rich and MoO3 -rich composition region, respectively, were evidenced. The constant heating rate thermogravimetry in hydrogen atmosphere revealed that the reduction reactions proceed within the two clearly separated temperature regions. On the basis of mass changes, the mechanism of reduction processes was discussed. The measurements revealed considerable inhibition of CuO reduction by MoO3, and huge acceleration of MoO3 → MoO2 reduction step by copper. The particularities found in this system were commented in relation to our similar studies in NiO-MoO3 and CuO-WO3 systems. For particular composition, x = 0.5, existing preferably in form of a-CuMoO4, kinetic parameters of reduction were determined. The composition of oxide mixture influenced the particle size and morphology of resulting metallic Cu-Mo composites.
PB  - Elsevier BV
T2  - International Journal of Refractory Metals and Hard Materials
T1  - Thermogravimetric insight in the reduction of xCuO – (1-x)MoO3 oxide system (0.1 ≤ x ≤ 0.9) by hydrogen
SP  - 105480
VL  - 96
DO  - 10.1016/j.ijrmhm.2021.105480
ER  -

@article{
author = "Jelić, Dijana and Zeljković, Saša and Jugović, Dragana and Mentus, Slavko",
year = "2021",
url = "https://dais.sanu.ac.rs/123456789/10534",
abstract = "The oxide mixtures xCuO-(1-x) MoO3 were synthesized by gel-combustion procedure. The existence of phase mixture CuO + Cu3Mo2O9 and MoO3 + CuMoO4 in CuO-rich and MoO3 -rich composition region, respectively, were evidenced. The constant heating rate thermogravimetry in hydrogen atmosphere revealed that the reduction reactions proceed within the two clearly separated temperature regions. On the basis of mass changes, the mechanism of reduction processes was discussed. The measurements revealed considerable inhibition of CuO reduction by MoO3, and huge acceleration of MoO3 → MoO2 reduction step by copper. The particularities found in this system were commented in relation to our similar studies in NiO-MoO3 and CuO-WO3 systems. For particular composition, x = 0.5, existing preferably in form of a-CuMoO4, kinetic parameters of reduction were determined. The composition of oxide mixture influenced the particle size and morphology of resulting metallic Cu-Mo composites.",
publisher = "Elsevier BV",
journal = "International Journal of Refractory Metals and Hard Materials",
title = "Thermogravimetric insight in the reduction of xCuO – (1-x)MoO3 oxide system (0.1 ≤ x ≤ 0.9) by hydrogen",
pages = "105480",
volume = "96",
doi = "10.1016/j.ijrmhm.2021.105480"
}

Jelić D, Zeljković S, Jugović D, Mentus S. Thermogravimetric insight in the reduction of xCuO – (1-x)MoO3 oxide system (0.1 ≤ x ≤ 0.9) by hydrogen. International Journal of Refractory Metals and Hard Materials. 2021;96:105480

Jelić, D., Zeljković, S., Jugović, D.,& Mentus, S. (2021). Thermogravimetric insight in the reduction of xCuO – (1-x)MoO3 oxide system (0.1 ≤ x ≤ 0.9) by hydrogen.
International Journal of Refractory Metals and Hard MaterialsElsevier BV., 96, 105480.
https://doi.org/10.1016/j.ijrmhm.2021.105480

Jelić Dijana, Zeljković Saša, Jugović Dragana, Mentus Slavko, "Thermogravimetric insight in the reduction of xCuO – (1-x)MoO3 oxide system (0.1 ≤ x ≤ 0.9) by hydrogen" 96 (2021):105480,
https://doi.org/10.1016/j.ijrmhm.2021.105480 .