Hinde, CS,Ansovini, D,Wells, PP,Collins, G,Van Aswegen, S,Holmes, JD,Hor, TSA,Raja, R

2015

June

ACS Catalysis

Elucidating-Structure Property Relationships in the Design of Metal Nanoparticle Catalysts for the Activation of Molecular Oxygen

Validated

()

nanoparticle catalysis vanillyl alcohol structure-property correlations aerobic oxidation vanillin EXAFS SUPPORTED GOLD NANOPARTICLES SOLVENT-FREE OXIDATION SELECTIVE OXIDATION PALLADIUM NANOPARTICLES AEROBIC OXIDATION SINGLE-STEP ALCOHOLS SIZE AU PD

5

3807

3816

A novel synthetic strategy for the design of metal nanoparticles by extrusion of anionic chloride precursors from a porous copper chlorophosphate framework has been devised for the sustainable aerobic oxidation of vanillyl alcohol (4-hydroxy-3-methoxybenzyl alcohol) to vanillin (4-hydroxy-3-methoxybenzaldehyde) using a one-step, base-free method. The precise nature of the Au, Pt, and Pd species has been elucidated for the as-synthesized and thermally activated analogues, which exhibit fascinating catalytic properties when subjected to diverse activation environments. By employing a combination of structural and spectroscopic characterization tools, it has been shown that analogous heat treatments have differing effects on extrusion of a particular metal species. The most active catalysts in this series of materials were the extruded Pt nanoparticles that were generated by reduction in H-2, which exhibit enhanced catalytic behavior, when compared to its Au or Pd counterparts, for industrially significant, aerobic oxidation reactions.

10.1021/acscatal.5b00481