TY - JOUR
T1 - RhNPs supported onN-functionalized mesoporous silica
T2 - effect on catalyst stabilization and catalytic activity
AU - Pulido-Díaz, Israel T.
AU - Serrano-Maldonado, Alejandro
AU - López-Suárez, Carlos César
AU - Méndez-Ocampo, Pedro A.
AU - Portales-Martínez, Benjamín
AU - Gutiérrez-Alejandre, Aída
AU - Salas-Martin, Karla P.
AU - Guerrero-Ríos, Itzel
N1 - Publisher Copyright:
© The Royal Society of Chemistry 2021.
PY - 2021/3/7
Y1 - 2021/3/7
N2 - Amine and nicotinamide groups grafted on ordered mesoporous silica (OMS) were investigated as stabilizers for RhNPs used as catalysts in the hydrogenation of several substrates, including carbonyl and aryl groups. Supported RhNPs on functionalized OMS were prepared by controlled decomposition of an organometallic precursor of rhodium under dihydrogen pressure. The resulting materials were characterized thoroughly by spectroscopic and physical techniques (FTIR, TGA, BET, SEM, TEM, EDX, XPS) to confirm the formation of spherical rhodium nanoparticles with a narrow size distribution supported on the silica surface. The use of nicotinamide functionalized OMS as a support afforded small RhNPs (2.3 ± 0.3 nm), and their size and shape were maintained after the catalyzed acetophenone hydrogenation. In contrast, amine-functionalized OMS formed RhNP aggregates after the catalytic reaction. The supported RhNPs could selectively reduce alkenyl, carbonyl, aryl and heteroaryl groups and were active in the reductive amination of phenol and morpholine, using a low concentration of the precious metal (0.07-0.18 mol%).
AB - Amine and nicotinamide groups grafted on ordered mesoporous silica (OMS) were investigated as stabilizers for RhNPs used as catalysts in the hydrogenation of several substrates, including carbonyl and aryl groups. Supported RhNPs on functionalized OMS were prepared by controlled decomposition of an organometallic precursor of rhodium under dihydrogen pressure. The resulting materials were characterized thoroughly by spectroscopic and physical techniques (FTIR, TGA, BET, SEM, TEM, EDX, XPS) to confirm the formation of spherical rhodium nanoparticles with a narrow size distribution supported on the silica surface. The use of nicotinamide functionalized OMS as a support afforded small RhNPs (2.3 ± 0.3 nm), and their size and shape were maintained after the catalyzed acetophenone hydrogenation. In contrast, amine-functionalized OMS formed RhNP aggregates after the catalytic reaction. The supported RhNPs could selectively reduce alkenyl, carbonyl, aryl and heteroaryl groups and were active in the reductive amination of phenol and morpholine, using a low concentration of the precious metal (0.07-0.18 mol%).
UR - http://www.scopus.com/inward/record.url?scp=85102250717&partnerID=8YFLogxK
U2 - 10.1039/d0dt04213g
DO - 10.1039/d0dt04213g
M3 - Artículo
C2 - 33595036
AN - SCOPUS:85102250717
SN - 1477-9226
VL - 50
SP - 3289
EP - 3298
JO - Dalton Transactions
JF - Dalton Transactions
IS - 9
ER -