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Nickel–Silicide Colloid Prepared under Mild Conditions as a Versatile Ni Precursor for More Efficient CO2 Reforming of CH4 Catalysts
journal contribution
posted on 2012-12-26, 00:00 authored by David Baudouin, Kaï Chung Szeto, Pierre Laurent, Aimery De Mallmann, Bernard Fenet, Laurent Veyre, Uwe Rodemerck, Christophe Copéret, Chloé ThieuleuxPreparing highly active and stable non-noble-metal-based
dry reforming
catalysts remains a challenge today. In this context, supported nickel
nanoparticles with sizes of 1.3 ± 0.2 and 2.1 ± 0.2 nm were
synthesized on silica and ceria, respectively, via a two-step colloidal
approach. First, 2-nm nickel–silicide colloids were synthesized
from Ni(COD)2 and octylsilane at low temperature; they
were subsequently dispersed onto supports prior to reduction under
H2. The resulting catalysts display high activity in dry
reforming compared to their analogues prepared using conventional
approaches, ceria providing greatly improved catalyst stability.