Support effect of Rh catalysts on the hydrogenation of m-dinitrobenzene
José M. Zambrano
1
,
Edna X Aguilera
1
,
Jairo Cubillos
1
,
Hugo Rojas
1
,
A. Gómez-Cortés
2
,
G. Gonzalez Dı́az
2
Publication type: Journal Article
Publication date: 2019-03-01
scimago Q1
wos Q2
SJR: 0.878
CiteScore: 7.2
Impact factor: 4.9
ISSN: 24688231
Catalysis
Physical and Theoretical Chemistry
Process Chemistry and Technology
Abstract
The effect of the support (ZrO2, Al2O3, and TiO2) of Rh (1 wt%) catalysts for the hydrogenation of m-dinitrobenzene (m-DNB) in liquid phase was studied. The catalysts were reduced at 300 °C and characterized by EDS, TPR, TEM, N2 Adsorption, H2 chemisorption, XPS and Pyr-FTIR. Occurrence of partially reduced Rh species and metallic Rh is different among catalysts as evidenced by XPS. A typical SMSI effect was observed in Rh/TiO2 catalyst according to comparison of Hydrogen chemisorption and TEM results. Kinetic analysis of the m-DNB hydrogenation showed that the first step hydrogenation rate (m-DNB to m-NA, kinetic constant k1) is faster than the second one (m-NA to m-PDA, kinetic constant k2) and this depending on the catalyst. m-DNB preferentially adsorbs on electron deficient sites provided by Rhn+ species present in Rh/Al2O3 and Rh/TiO2 catalysts and depending on the relative amount of this sites the m-DNB is partially hydrogenated to m-NA. A direct correlation of k2/k1 ratio with the amount of Rh° was found.
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GOST
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Zambrano J. M. et al. Support effect of Rh catalysts on the hydrogenation of m-dinitrobenzene // Molecular Catalysis. 2019. Vol. 465. pp. 54-60.
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Zambrano J. M., Aguilera E. X., Cubillos J., Rojas H., Gómez-Cortés A., Gonzalez Dı́az G. Support effect of Rh catalysts on the hydrogenation of m-dinitrobenzene // Molecular Catalysis. 2019. Vol. 465. pp. 54-60.
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TY - JOUR
DO - 10.1016/j.mcat.2018.12.013
UR - https://doi.org/10.1016/j.mcat.2018.12.013
TI - Support effect of Rh catalysts on the hydrogenation of m-dinitrobenzene
T2 - Molecular Catalysis
AU - Zambrano, José M.
AU - Aguilera, Edna X
AU - Cubillos, Jairo
AU - Rojas, Hugo
AU - Gómez-Cortés, A.
AU - Gonzalez Dı́az, G.
PY - 2019
DA - 2019/03/01
PB - Elsevier
SP - 54-60
VL - 465
SN - 2468-8231
ER -
Cite this
BibTex (up to 50 authors)
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@article{2019_Zambrano,
author = {José M. Zambrano and Edna X Aguilera and Jairo Cubillos and Hugo Rojas and A. Gómez-Cortés and G. Gonzalez Dı́az},
title = {Support effect of Rh catalysts on the hydrogenation of m-dinitrobenzene},
journal = {Molecular Catalysis},
year = {2019},
volume = {465},
publisher = {Elsevier},
month = {mar},
url = {https://doi.org/10.1016/j.mcat.2018.12.013},
pages = {54--60},
doi = {10.1016/j.mcat.2018.12.013}
}