Highly ordered mesoporous alumina was prepared via evaporation induced self assembly and was impregnated to afford a family of Pd/meso-Al2O3 catalysts for the aerobic selective oxidation (selox) of allylic alcohols under mild reaction conditions. CO chemisorption and XPS identify the presence of highly dispersed (0.9–2 nm) nanoparticles comprising heavily oxidised PdO surfaces, evidencing a strong palladium-alumina interaction. Surface PdO is confirmed as the catalytically active phase responsible for allylic alcohol selox, with initial rates for Pd/meso-Al2O3 far exceeding those achievable for palladium over either amorphous alumina or mesoporous silica supports. Pd/meso-Al2O3 is exceptionally active for the atom efficient selox of diverse allylic alcohols, with activity inversely proportional to alcohol mass.
Bibliographical noteNOTICE: this is the author’s version of a work that was accepted for publication in Catalysis communications. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Parlett, CMA, Durndell, LJ, Wilson, K, Bruce, DW, Hondow, NS & Lee, AF, 'Selective oxidation of allylic alcohols over highly ordered Pd/meso-Al2 O3 catalysts' Catalysis communications, vol.44 (2014) DOI http://dx.doi.org/10.1016/j.catcom.2013.07.005
Funding: EPSRC (EP/E046754/1; EP/G007594/2; EP/F009488/1) for a Leadership Fellowship; Royal Society for an Industry Fellowship; through the Leeds EPSRC Nanoscience and Nanotechnology Research Equipment Facility (LENNF) (EP/F056311/1).
Supplementary data: http://dx.doi.org/10.1016/j.catcom.2013.07.005.
- selective oxidation
- allylic alcohol