- Base-free direct oxidation of 1-octanol to octanoic acid and its octyl ester over supported gold catalysts.
Base-free direct oxidation of 1-octanol to octanoic acid and its octyl ester over supported gold catalysts.
ChemSusChem (2012-10-16)
Tamao Ishida, Yuichiro Ogihara, Hironori Ohashi, Tomoki Akita, Tetsuo Honma, Hiroshi Oji, Masatake Haruta
PMID23065901
ABSTRACT
The choice of a suitable support for gold nanoparticles (Au NPs) enabled the direct oxidation of unreactive aliphatic alcohol, 1-octanol, to octanoic acid and octyl octanoate in the absence of a base. Under optimized conditions, Au NPs supported on NiO (Au/NiO) exhibited remarkably high catalytic activities and excellent selectivities to octanoic acid (e.g., 97 %) at full conversion. In contrast to Au/NiO, Au/CeO₂ selectively produced octyl octanoate as a major product in a base-free aqueous solution with a maximum selectivity of 82 % under optimized conditions.
MATERIALS
Product Number
Brand
Product Description
Sigma-Aldrich
Cerium(IV) oxide, nanopowder, <50 nm particle size (BET), 99.95% trace rare earth metals basis
Sigma-Aldrich
Cerium(IV) oxide, dispersion, 20 wt. % colloidal dispersion in 2.5% acetic acid, 30-50 nm avg. part. size
Supelco
Caprylic Acid (Octanoic Acid), Pharmaceutical Secondary Standard; Certified Reference Material
Caprylic acid, European Pharmacopoeia (EP) Reference Standard
Sigma-Aldrich
Cerium(IV) oxide, dispersion, nanoparticles, <25 nm particle size, 10 wt. % in H2O
Sigma-Aldrich
Nickel(II) oxide, nanopowder, <50 nm particle size (TEM), 99.8% trace metals basis