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Characterisation of BN-supported palladium oxide catalyst used for hydrocarbon oxidation

Paper ID Volume ID Publish Year Pages File Format Full-Text
43833 45990 2007 9 PDF Available
Title
Characterisation of BN-supported palladium oxide catalyst used for hydrocarbon oxidation
Abstract

Hexagonal boron nitride (BN), with a graphite-type structure and with surface area of 184 m2/g was used as a support for palladium oxide (PdO/BN). About 1 wt% of palladium was deposited on BN by incipient wetness method by using palladium nitrate as precursor. The support and the catalyst were characterized by BET, TEM, XRD, XPS, ICP, TG, TPD, in situ ac electrical conductivity and by ammonia adsorption microcalorimetry. Oxidation of propylene and methane were used as model reactions to study the catalytic properties of the PdO/BN catalyst. The BN support was practically inactive in propylene oxidation up to 400 °C, while the onset of the oxidation was detected around 200 °C on PdO/BN, which points out the role of the palladium in adsorption of the reactive hydrocarbon species. At the same time, this temperature is coincident with the increase of the electronic conductivity on both BN and PdO/BN samples, which is important for oxygen adsorption/activation as electrophilic species. The catalyst was inactive in methane oxidation below 400 °C. Only about 2% CH4 conversion was observed at 400 °C, increasing sharply up to 87% at 550 °C with methane transformation only to CO2 and water.

Graphical abstractHexagonal BN (with graphite structure) was used as a support for a palladium catalyst (1 wt% Pd). Both solids were characterized by BET, TEM, XRD, XPS, ICP, TG, TPD, in situ ac electrical conductivity and ammonia adsorption microcalorimetry. Propylene and methane oxidation were used to study the catalytic properties of Pd/BN. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Boron nitride; Palladium catalyst; In situ electrical conductivity; Hydrocarbon oxidation; Acidity
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Characterisation of BN-supported palladium oxide catalyst used for hydrocarbon oxidation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 316, Issue 2, 10 January 2007, Pages 250–258
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
Price after discount Only $4.95
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