Low-temperature ammonia oxidation over Pt/g-alumina : the influence of the alumina support

D.P. Sobczyk; E.J.M. Hensen; A.M. Jong, de; R.A. Santen, van

doi:10.1023/A%3A1024876421421

Low-temperature ammonia oxidation over Pt/g-alumina : the influence of the alumina support

D.P. Sobczyk, E.J.M. Hensen, A.M. Jong, de, R.A. Santen, van

Inorganic Materials & Catalysis

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Abstract

Deactivation of a Pt/g-alumina catalyst used for low-temp. ammonia oxidn. was studied using positron-emission profiling (PEP). Evidence is presented that irreversibly adsorbed nitrogen and oxygen species deactivate the catalyst. This deactivation is further accelerated by preadsorption of oxygen on the catalyst. Ammonia strongly interacts with the alumina support. A steady state of the ammonia oxidn. reaction is reached after the alumina sites are satd. with ammonia. PEP expts. show that spillover of oxygen to the support is not significant during the ammonia oxidn.

Original language	English
Pages (from-to)	109-117
Journal	Topics in Catalysis
Volume	23
Issue number	1-4
DOIs	https://doi.org/10.1023/A%3A1024876421421 https://doi.org/10.1023/A:1024876421421
Publication status	Published - 2003

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abstract = "Deactivation of a Pt/g-alumina catalyst used for low-temp. ammonia oxidn. was studied using positron-emission profiling (PEP). Evidence is presented that irreversibly adsorbed nitrogen and oxygen species deactivate the catalyst. This deactivation is further accelerated by preadsorption of oxygen on the catalyst. Ammonia strongly interacts with the alumina support. A steady state of the ammonia oxidn. reaction is reached after the alumina sites are satd. with ammonia. PEP expts. show that spillover of oxygen to the support is not significant during the ammonia oxidn.",

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AB - Deactivation of a Pt/g-alumina catalyst used for low-temp. ammonia oxidn. was studied using positron-emission profiling (PEP). Evidence is presented that irreversibly adsorbed nitrogen and oxygen species deactivate the catalyst. This deactivation is further accelerated by preadsorption of oxygen on the catalyst. Ammonia strongly interacts with the alumina support. A steady state of the ammonia oxidn. reaction is reached after the alumina sites are satd. with ammonia. PEP expts. show that spillover of oxygen to the support is not significant during the ammonia oxidn.

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DO - 10.1023/A%3A1024876421421

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JO - Topics in Catalysis

JF - Topics in Catalysis

SN - 1022-5528

IS - 1-4

ER -

Low-temperature ammonia oxidation over Pt/g-alumina : the influence of the alumina support

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