List of authors:
Self-Supported PdxBi Catalysts for the Electrooxidation of Glycerol in Alkaline Media.
Anna Zalineeva Russian PhD in the team E4 Catalysis and non-conventional media, Steve Baranton and Christophe Coutanceau just published an article on the valuation of glycerol in JACS – Journal of the American Chemical Society: using nanostructures for Palladium–Bismuth oxidation of glycerol. Product including the bio-fuel industry, glycerol is a waste which is converted into a molecule of interest (e.g. aldehyde) … Interest is the selectivity of these catalysts towards products of highly valuable reactions.
Anna Zalineeva IC2MP
List of authors : Anna Zalineeva, Alexey Serov, Monica Padilla, Ulises Martinez, Kateryna Artyushkova, Stève Baranton, Christophe Coutanceau, and Plamen B. Atanassov.
ABSTRACT : Highly active self-supported PdxBi catalysts are synthesized by the sacrificial support method. Self-supported PdxBi catalysts have a porous nanostructured morphology with high surface areas (in the range from 75 to 100 m2 g−1), making PdxBi a state-of-the-art catalyst.
Pd4Bi displays the highest activity toward glycerol oxidation. In situ Fourier transform infrared spectroscopy highlights the unique catalytic behavior of self-supported PdxBi materials due to their particular structure and morphology. The confinement of reactants and intermediates in pores acting as nanoreactors is responsible for the high selectivity as a function of the electrode potential : aldehyde and ketone at low potentials, hydroxypyruvate at moderate potentials, and CO2 at high potentials. Moreover, the selectivity depends on the electrode history : it is different for the positive potential scan direction than for the reverse direction, where the catalyst becomes selective toward the production of carboxylates.