6533b7ddfe1ef96bd12753b0
RESEARCH PRODUCT
Effect of Pre-Reduction on the Properties and the Catalytic Activity of Pd/Carbon Catalysts: A Comparison with Pd/Al2O3
Giuseppe LeofantiAlessandro LongoFrancesco GianniciGiovanni AgostiniCarlo LambertiElena GroppoRiccardo Pellegrinisubject
characterization techniqueCO chemisorptionInorganic chemistryPd-based catalystchemistry.chemical_elementTPRHeterogeneous catalysisPd/CarbonCatalysisCatalysisMetalCharacterization techniquesCatalyst pre-reductionTemperature-programmed reductionX-ray absorption spectroscopymetal nanoparticlein situPd-based catalystsPd/aluminaSAXSGeneral ChemistryXANESSmall Angle X-ray ScatteringX-ray Absorption SpectroscopyPd/Carbon; Pd/alumina; metal nanoparticle; catalysis; Catalyst pre-reduction; in situ; SAXS; XANES; Pd-based catalysts; heterogeneous catalysis; Characterization techniques; Temperature-programmed reduction; TPR; CO chemisorption; TEM; X-ray absorption spectroscopy; Small Angle X-ray Scatteringheterogeneous catalysischemistryReagentvisual_arttemperature-programmed reductionvisual_art.visual_art_mediumTEMheterogeneous catalysiSmall Angle X-ray SpectroscopyDispersion (chemistry)Carbondescription
The effect of pre-reduction in solution with chemical reagents on the catalytic performance and catalyst properties of Pd/carbon catalysts was systematically investigated with a multitechnique approach. The results are critically discussed in comparison to those recently obtained on analogous Pd/alumina catalysts. It was proved that the Pd phase on the carbon surface is characterized by a high mobility, opposite to what occurs on alumina. As a result, the Pd particles on carbon aggregate together during pre-reduction, with a consequent decrease in available metal surface. Pd particles remain aggregated also in reaction conditions; the decreased Pd dispersion negatively affects the catalyst activity in the debenzylation of 4-benzyloxyphenol.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-12-13 |