Selective Oxidation of Glycerol by Highly Active Bimetallic Catalysts at Ambient Temperature under Base Free Conditions
Andrew A. Herzing, Gemma L. Brett, Peter Miedziak, Nikolaos Dimitratos, Meenakshisundaram Sankar, Marco Conte, Jose A. Lopez-Sanchez, David W. Knight, Stuart H. Taylor, Graham J. Hutchings, Qian He, Christopher J. Kiely
AuPt or AuPd nanoparticles when supported on Mg(OH)2 are highly active for the selective oxidation of glycerol under base-free conditions at ambient temperatures. When bimetallic particles with the appropriate composition are prepared, catalysts with a narrow and well defined particle size distribution can be produced. The use of platinum as opposed to palladium as the alloying element leads to both enhanced glycerol conversion and selectivity towards C3 products. The ability to carry out the reaction at ambient temperatures significantly decreases the overall cost of the process. Furthermore, the application of these AuPt catalysts to low temperature reaction systems could lead to bench-top reaction procedures for alcohol oxidation. To the best of our knowledge, these results constitute the first examples of using Mg(OH)2 as a support for AuPt alloy nanoparticles in order to facilitate the oxidation of polyols with molecular oxygen under mild conditions.