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An XPS evidence of the effect of the electronic state of Pd on CH4 oxidation on Pd/γ–Al2O3 catalysts |
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| Authors: | G Corro O Vzquez-Cuchillo F Banuelos JLG Fierro M Azomoza |
| Affiliation: | aInstituto de Ciencias, Benemérita Universidad Autónoma de Puebla, 4 sur 104, 72000 Puebla, Mexico;bInstituto de Catálisis y Petroleoquímica, CSIC, Cantoblanco, 28049 Madrid, Spain;cUniversidad Autónoma Metropolitana-I, México DF, Mexico |
| Abstract: | In this work, we investigated the catalytic activity of 2% Pd/γ–Al2O3 and 2% Pd–1% Sn/γ–Al2O3 for CH4 oxidation in lean conditions in the presence and in the absence of SO2 in the reaction feed. The catalysts were studied by the Pd3d5/2 electron binding energy values determined by XPS analysis. Sulfates formation and/or tin addition to Pd/Al2O3 resulted in an increase of the Pd3d5/2 electron binding energy. Results showed a direct relation between Pd activity for CH4 oxidation and the degree of oxidation of Pd species. |
| Keywords: | Methane oxidation NGV’ s emissions Pd-Sn catalysts Sulfur deactivation |
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