Coke deposition on automotive three-way catalysts studied with LEIS

J.M.A. Harmsen; W.P.A. Jansen; J.H.B.J. Hoebink; J.C. Schouten; H.H. Brongersma

doi:10.1023/A:1016633114136

Coke deposition on automotive three-way catalysts studied with LEIS

J.M.A. Harmsen, W.P.A. Jansen, J.H.B.J. Hoebink, J.C. Schouten, H.H. Brongersma

Onderzoeksoutput: Bijdrage aan tijdschrift › Tijdschriftartikel › Academic › peer review

19 Citaten (Scopus)

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LEIS (low-energy ion scattering spectroscopy) measurements have been performed on fresh and used com. three-way catalysts (Pt/Rh/CeO2/g-Al2O3). The catalysts showed a significant decrease in the platinum surface concn. of approx. 50% after use in hydrocarbon oxidn. at cold-start conditions, and could be completely regenerated. The selectivity of LEIS towards the outermost at. layer allowed a one to one correlation between the surface Pt concn. as detected with LEIS and that obtained by kinetic modeling. This supports recent assumptions on selective deactivation. Conventional surface science techniques such as XPS, SIMS, or AES would have yielded ambiguous results, since their probing depths are not limited to the outermost at. layer.

Originele taal-2	Engels
Pagina's (van-tot)	133-137
Tijdschrift	Catalysis Letters
Volume	74
Nummer van het tijdschrift	3-4
DOI's	https://doi.org/10.1023/A:1016633114136
Status	Gepubliceerd - 2001

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title = "Coke deposition on automotive three-way catalysts studied with LEIS",

abstract = "LEIS (low-energy ion scattering spectroscopy) measurements have been performed on fresh and used com. three-way catalysts (Pt/Rh/CeO2/g-Al2O3). The catalysts showed a significant decrease in the platinum surface concn. of approx. 50% after use in hydrocarbon oxidn. at cold-start conditions, and could be completely regenerated. The selectivity of LEIS towards the outermost at. layer allowed a one to one correlation between the surface Pt concn. as detected with LEIS and that obtained by kinetic modeling. This supports recent assumptions on selective deactivation. Conventional surface science techniques such as XPS, SIMS, or AES would have yielded ambiguous results, since their probing depths are not limited to the outermost at. layer.",

author = "J.M.A. Harmsen and W.P.A. Jansen and J.H.B.J. Hoebink and J.C. Schouten and H.H. Brongersma",

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doi = "10.1023/A:1016633114136",

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T1 - Coke deposition on automotive three-way catalysts studied with LEIS

AU - Harmsen, J.M.A.

AU - Jansen, W.P.A.

AU - Hoebink, J.H.B.J.

AU - Schouten, J.C.

AU - Brongersma, H.H.

PY - 2001

Y1 - 2001

N2 - LEIS (low-energy ion scattering spectroscopy) measurements have been performed on fresh and used com. three-way catalysts (Pt/Rh/CeO2/g-Al2O3). The catalysts showed a significant decrease in the platinum surface concn. of approx. 50% after use in hydrocarbon oxidn. at cold-start conditions, and could be completely regenerated. The selectivity of LEIS towards the outermost at. layer allowed a one to one correlation between the surface Pt concn. as detected with LEIS and that obtained by kinetic modeling. This supports recent assumptions on selective deactivation. Conventional surface science techniques such as XPS, SIMS, or AES would have yielded ambiguous results, since their probing depths are not limited to the outermost at. layer.

AB - LEIS (low-energy ion scattering spectroscopy) measurements have been performed on fresh and used com. three-way catalysts (Pt/Rh/CeO2/g-Al2O3). The catalysts showed a significant decrease in the platinum surface concn. of approx. 50% after use in hydrocarbon oxidn. at cold-start conditions, and could be completely regenerated. The selectivity of LEIS towards the outermost at. layer allowed a one to one correlation between the surface Pt concn. as detected with LEIS and that obtained by kinetic modeling. This supports recent assumptions on selective deactivation. Conventional surface science techniques such as XPS, SIMS, or AES would have yielded ambiguous results, since their probing depths are not limited to the outermost at. layer.

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DO - 10.1023/A:1016633114136

M3 - Article

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EP - 137

JO - Catalysis Letters

JF - Catalysis Letters

IS - 3-4

ER -

Coke deposition on automotive three-way catalysts studied with LEIS

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