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Title of Journal: Top Catal

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Abbravation: Topics in Catalysis

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Springer US

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DOI

10.1007/s00450-009-0056-x

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1572-9028

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Characterization and Activity of Pd–Ir Catalysts i

Authors: Anastasiia Shipitcyna Niko M Kinnunen Yulia Hilli Mika Suvanto Tapani A Pakkanen
Publish Date: 2016/06/08
Volume: 59, Issue: 13-14, Pages: 1097-1103
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Abstract

Bimetallic Pd–Ir catalysts based on halogen free precursors supported on alumina and Lastabilized alumina were prepared and characterized The influence of iridium cometal loading on activity of supported palladium catalysts in CO and C3H6 oxidation was studied In addition the effect of thermal aging on the catalytic activity was discussed The powder Xray diffraction scanning electron microscopy transmission electron microscopy combined with energy dispersive Xray spectroscopy thermogravimetric analysis were used for characterization of the catalysts The catalytic activity of prepared catalysts was determined based on conversion of CO and C3H6 under stoichiometric condition The activity tests showed that bimetallic catalyst with PdIr molar ratio of 100018 on both support materials has the lowest lightoff temperature difference between the fresh and aged catalysts in CO and C3H6 oxidation However high Ir loading improved the activity of the catalysts only if Lastabilized aluminum oxide was used as a support material Lanthanum oxide promoted the activity of the fresh catalysts in CO and C3H6 oxidation Overall Ir is a promising cometal candidate for Pdbased catalyst for improving CO and C3H6 oxidation activity of the catalyst under stoichiometric conditions

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