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Journals / Turkish Journal of Chemistry / 2008 / Cilt: 32 - Sayı: 5

CO Oxidation over Mono and Bi-Metallic Sequentially Impregnated Pd-Pt Catalysts

Sarp KAYA
And Deniz ÜNER
Pages
645–652
Publication Date
2008-05-01
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

On the other hand, in the presence of excess CO the reaction rates over Pd catalysts remained constant due to the availability of the subsurface oxygen pools in PdO layers.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:The CO oxidation capability of sequentially impregnated Pd-Pt/g -Al2O3 bimetallic catalysts was tested.
📊
Key Findings & Data:An investigation of the effect of CO partial pressure on the reaction rates over monometallic catalysts indicated that in the presence of excess CO the surface of Pt was poisoned.
💡
Conclusion & Impact:On the other hand, in the presence of excess CO the reaction rates over Pd catalysts remained constant due to the availability of the subsurface oxygen pools in PdO layers.
🔬Design:Lab & Field Experiment
📍Scope:Comprehensive Sample
⚙️Variables:CO oxidation · bimetallic catalysts · palladium

Abstract

The CO oxidation capability of sequentially impregnated Pd-Pt/g -Al2O3 bimetallic catalysts was tested. The CO oxidation light-off curves were hierarchically spaced between monometallic Pd and monometallic Pt, which showed the highest and lowest activity, respectively, indicating that sequential impregnation did not result in the formation of bimetallic particles, but that the catalysts remained as monometallic entities over the support surface. An investigation of the effect of CO partial pressure on the reaction rates over monometallic catalysts indicated that in the presence of excess CO the surface of Pt was poisoned. On the other hand, in the presence of excess CO the reaction rates over Pd catalysts remained constant due to the availability of the subsurface oxygen pools in PdO layers.

Özet

The CO oxidation capability of sequentially impregnated Pd-Pt/g -Al2O3 bimetallic catalysts was tested. The CO oxidation light-off curves were hierarchically spaced between monometallic Pd and monometallic Pt, which showed the highest and lowest activity, respectively, indicating that sequential impregnation did not result in the formation of bimetallic particles, but that the catalysts remained as monometallic entities over the support surface. An investigation of the effect of CO partial pressure on the reaction rates over monometallic catalysts indicated that in the presence of excess CO the surface of Pt was poisoned. On the other hand, in the presence of excess CO the reaction rates over Pd catalysts remained constant due to the availability of the subsurface oxygen pools in PdO layers.

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Cite This Article

KAYA, S., ÜNER, A. D. (2008). CO Oxidation over Mono and Bi-Metallic Sequentially Impregnated Pd-Pt Catalysts. Turkish Journal of Chemistry, Cilt: 32 - Sayı: 5, 645–652. https://ajindex.com/articles/184995

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