TY - JOUR
T1 - Confined palladium colloids in mesoporous frameworks for carbon nanotube growth
AU - Berenguer-Murcia, A.
AU - Rebrov, E.V.
AU - Cabaj, M.
AU - Wheatley, A.E.H.
AU - Johnson, B.F.G.
AU - Robertson, J.
AU - Schouten, J.C.
PY - 2009
Y1 - 2009
N2 - Palladium colloidal nanoparticles with an average size of approximately 2.4 nm have been incorporated into mesoporous inorganic thin films following a multistep approach. This involves the deposition of mesoporous titania thin films with a thickness of 200 nm by spin-coating on titanium plates with a superhydrophilic titania outer layer and activation by calcination in a vacuum furnace at 573 K. Nanoparticles have been confined within the porous titania network by dip-coating noble metal suspensions onto these mesoporous thin films. Finally, the resulting nanoconfined systems were used as substrates for the growth of oriented carbon nanotubes (CNTs) using plasma-enhanced chemical vapour deposition at 923 K in order to enhance their surface area. These CNTs were tested in the hydrogenation of phenylacetylene by hydrogen in a batch reactor. The initial reaction rate observed on a CNT/TiO2 structured catalyst was considerably higher than that on 1 wt% Pd/TiO2 thin films. © 2009 The Author(s).
AB - Palladium colloidal nanoparticles with an average size of approximately 2.4 nm have been incorporated into mesoporous inorganic thin films following a multistep approach. This involves the deposition of mesoporous titania thin films with a thickness of 200 nm by spin-coating on titanium plates with a superhydrophilic titania outer layer and activation by calcination in a vacuum furnace at 573 K. Nanoparticles have been confined within the porous titania network by dip-coating noble metal suspensions onto these mesoporous thin films. Finally, the resulting nanoconfined systems were used as substrates for the growth of oriented carbon nanotubes (CNTs) using plasma-enhanced chemical vapour deposition at 923 K in order to enhance their surface area. These CNTs were tested in the hydrogenation of phenylacetylene by hydrogen in a batch reactor. The initial reaction rate observed on a CNT/TiO2 structured catalyst was considerably higher than that on 1 wt% Pd/TiO2 thin films. © 2009 The Author(s).
U2 - 10.1007/s10853-009-3629-y
DO - 10.1007/s10853-009-3629-y
M3 - Article
SN - 0022-2461
VL - 44
SP - 6563
EP - 6570
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 24
ER -