RT Journal Article
T1 Deposition of Ni nanoparticles onto porous supports using supercritical CO2: effect of the precursor and reduction methodology
A1 Morère, Jacobo
A1 Royuela, Sergio
A1 Asensio, Guillermo
A1 Enciso, Eduardo
A1 Pando, Concepción
A1 Cabañas Poveda, Albertina
AB The deposition of Ni nanoparticles into porous supports is very important in catalysis. In this paper, we explore the use of supercritical CO2 (scCO2) as a green solvent to deposit Ni nanoparticles on mesoporous SiO2 SBA-15 and a carbon xerogel. The good transport properties of scCO2 allowed the efficient penetration of metal precursors dissolved in scCO2 within the pores of the support without damaging its structure. Nickel hexafluoroacetylacetonate hydrate, nickel acetylacetonate, bis(cyclopentadienyl)nickel, Ni(NO3)2⋅6H2O and NiCl2⋅6H2O were tried as precursors. Different methodologies were used: impregnation in scCO2 and reduction in H2/N2 at 400°C and low pressure, reactive deposition using H2 at 200–250°C in scCO2 and reactive deposition using ethanol at 150–200°C in scCO2. The effect of precursor and methodology on the nickel particle size and the material homogeneity (on the different substrates) was analysed. This technology offers many opportunities in the preparation of metal-nanostructured materials.
PB The Royal Society of London
SN 0264-3820 (Print) ; 2053-9231 (On line)
YR 2015
FD 2015-11-16
LK https://hdl.handle.net/20.500.14352/24238
UL https://hdl.handle.net/20.500.14352/24238
LA eng
NO Ministerio de Economía y Competitividad
NO Ministerio de Economía y Competitividad
DS Docta Complutense
RD 16 may 2024