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Burch, Robbie; Crittle, D.J.; Southward, Barry W. L.; Sullivan, James A.

doi:10.1023/a:1009088112345

Cited by 21 publications

(8 citation statements)

References 8 publications

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“…The adsorption of these sulfur traces on the catalyst surface can lead to a substantial decrease of its reactivity. 10,11,[13][14][15][16][17][18][19][20][21] First endeavors to understand the effects of sulfur on the electronic structure, the adsorption capacity, and reactivity of palladium have been undertaken, 22 a) K. Gotterbarm and N. Luckas contributed equally to this work. b) Authors to whom correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of the sulfur oxidation on palladium: A combined in situ x-ray photoelectron spectroscopy and density-functional study

Gotterbarm

Luckas

Höfert

et al. 2012

The Journal of Chemical Physics

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We studied the reaction kinetics of sulfur oxidation on the Pd(100) surface by in situ high resolution x-ray photoelectron spectroscopy and ab initio density functional calculations. Isothermal oxidation experiments were performed between 400 and 500 K for small amounts (∼0.02 ML) of preadsorbed sulfur, with oxygen in large excess. The main stable reaction intermediate found on the surface is SO 4 , with SO 2 and SO 3 being only present in minor amounts. Density-functional calculations depict a reaction energy profile, which explains the sequential formation of SO 2 , SO 3 , and eventually SO 4 , also highlighting that the in-plane formation of SO from S and O adatoms is the rate limiting step. From the experiments we determined the activation energy of the rate limiting step to be 85 ± 6 kJ mol −1 by Arrhenius analysis, matching the calculated endothermicity of the SO formation.

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Section: Introductionmentioning

confidence: 99%

Kinetics of the sulfur oxidation on palladium: A combined in situ x-ray photoelectron spectroscopy and density-functional study

Gotterbarm

Luckas

Höfert

et al. 2012

The Journal of Chemical Physics

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“…Nevertheless the strong sensitivity of Pd catalysts to water and sulphur containing compounds represent a serious drawback to their use for exhaust after-treatment [2,[5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Regeneration of S-poisoned Pd/Al2O3 and Pd/CeO2/Al2O3 catalysts for the combustion of methane

et al. 2007

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This work investigates the regeneration of S-poisoned Pd/Al 2 O 3 and Pd/CeO 2 /Al 2 O 3 catalysts under different CH 4 containing atmospheres. Under lean combustion conditions in the presence of excess O 2 , partial regeneration took place for both systems only above 750°C after decomposition of stable sulphate species adsorbed on the support. Under alternate lean combustion/CH 4 -reducing pulse regeneration is markedly anticipated down to 550-600°C. Experiments evidenced an effective role of ceria in preventing PdO from sulphation and in promoting regeneration via sulphates decomposition under reducing conditions.

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“…Ceria-zirconia mixed oxides are a crucial component in a modern automotive emission-control catalyst; due to their redox properties, they provide the oxygen storage capacity (OSC) [10]. The effect of SO 2 on ceria and zirconia with or without noble metals has already been studied mainly over three-way catalysts [11,12], and methane combustion processes [13][14][15] all in different sulphur contents and temperatures.…”

mentioning

confidence: 99%

The Effect of Sulphur on the Activity of Pd/Al2O3, Pd/CeO2 and Pd/ZrO2 Diesel Exhaust Gas Catalysts

et al. 2008

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Pd/Al 2 O 3 , Pd/CeO 2 and Pd/ZrO 2 diesel oxidation catalysts and their washcoat materials were studied after sulphur treatment. The catalytic activities were analysed in simplified diesel exhaust gas composition by FT-IR technique. ICP-OES or XRF, physisorption and CO chemisorption was used to catalyst characterisation. The result shows that the sulphur treatment clearly deactivates the studied catalysts.

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Cited by 21 publications

References 8 publications

Kinetics of the sulfur oxidation on palladium: A combined in situ x-ray photoelectron spectroscopy and density-functional study

Kinetics of the sulfur oxidation on palladium: A combined in situ x-ray photoelectron spectroscopy and density-functional study

Regeneration of S-poisoned Pd/Al2O3 and Pd/CeO2/Al2O3 catalysts for the combustion of methane

The Effect of Sulphur on the Activity of Pd/Al2O3, Pd/CeO2 and Pd/ZrO2 Diesel Exhaust Gas Catalysts

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