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Efficient and Robust Reforming Catalyst in Severe Reaction Conditions by Nanoprecursor Reduction in Confined Space
Author(s) -
Dacquin JeanPhilippe,
Sellam Djamila,
BatiotDupeyrat Catherine,
Tougerti Asma,
Duprez Daniel,
Royer Sébastien
Publication year - 2014
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201300718
Subject(s) - catalysis , materials science , chemical engineering , nanoparticle , mesoporous silica , sintering , carbon dioxide reforming , mesoporous material , lanthanum , hydrogen , composite number , particle size , hydrogen production , oxide , steam reforming , non blocking i/o , carbon fibers , methane , methane reformer , specific surface area , inorganic chemistry , nanotechnology , composite material , syngas , chemistry , metallurgy , organic chemistry , engineering
The in situ autocombustion synthesis route is shown to be an easy and efficient way to produce nanoscaled nickel oxide containing lanthanum‐doped mesoporous silica composite. Through this approach, ∼3 nm NiO particles homogeneously dispersed in the pores of silica are obtained, while lanthanum is observed to cover the surface of the silica pore wall. Subsequent reduction of such composite precursors under hydrogen generates Ni 0 nanoparticles of a comparable size. Control over the size and size distribution of metallic nanoparticles clearly improved catalytic activity in the methane dry reforming reaction. In addition, these composite materials exhibit excellent stability under severe reaction conditions. This was achieved through the presence of LaO x species, which reduced active‐site carbon poisoning, and the confinement effect of the mesoporous support, which reduced metallic particle sintering.