TY - JOUR
T1 - Carbon-supported Ru and Pd nanoparticles: Efficient and recyclable catalysts for the aerobic oxidation of benzyl alcohol in water
AU - Garcia-Suarez, Eduardo J.
AU - Tristany, Mar
AU - García, Ana B.
AU - Collière, Vincent
AU - Philippot, Karine
PY - 2012
Y1 - 2012
N2 - Ru NPs and Pd NPs were firstly synthesized and further supported on mesoporous carbon materials. Spherical and homogenously dispersed MNPs displaying mean sizes in the range 1.2–2.2nm were thus achieved. The catalytic activity as well as the recyclability of these carbon-supported Ru and Pd NPs in the aerobic oxidation of benzyl alcohol to benzaldehyde in water was investigated, showing excellent conversions and high selectivity to the aldehyde. The selectivity towards aldehyde is particularly relevant since usually the oxidation of primary alcohols in water mainly yields the carboxylic acid. Moreover, these nanocatalysts present good recyclability in terms of conversion with up to eight successive reaction cycles. However, the selectivity to the aldehyde decreased, in some cases significantly, after the third cycle. The catalytic activity of these systems was found to be influenced by the hydrophilicity of the carbon support surface. However, the significance of this influence depends on the ligand used to stabilize the MNPs.
AB - Ru NPs and Pd NPs were firstly synthesized and further supported on mesoporous carbon materials. Spherical and homogenously dispersed MNPs displaying mean sizes in the range 1.2–2.2nm were thus achieved. The catalytic activity as well as the recyclability of these carbon-supported Ru and Pd NPs in the aerobic oxidation of benzyl alcohol to benzaldehyde in water was investigated, showing excellent conversions and high selectivity to the aldehyde. The selectivity towards aldehyde is particularly relevant since usually the oxidation of primary alcohols in water mainly yields the carboxylic acid. Moreover, these nanocatalysts present good recyclability in terms of conversion with up to eight successive reaction cycles. However, the selectivity to the aldehyde decreased, in some cases significantly, after the third cycle. The catalytic activity of these systems was found to be influenced by the hydrophilicity of the carbon support surface. However, the significance of this influence depends on the ligand used to stabilize the MNPs.
KW - Carbon materials
KW - Heterogeneous catalysis
KW - Metal nanoparticles
KW - Alcohol oxidation
KW - Recyclable catalysts
U2 - 10.1016/j.micromeso.2011.12.023
DO - 10.1016/j.micromeso.2011.12.023
M3 - Journal article
VL - 153
SP - 155
EP - 162
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
SN - 1387-1811
ER -