An XPS evidence of the effect of the electronic state of Pd on CH4 oxidation on Pd/gamma-Al2O3 catalysts

作者：Corro G^*; Vazquez Cuchillo O; Banuelos F; Fierro J L G; Azomoza M

来源：Catalysis Communications, 2007, 8(12): 1977-1980.

DOI：10.1016/j.catcom.2007.03.020

• methane oxidation
• NGV's emissions
• Pd-Sn catalysts
• sulfur deactivation

In this work, we investigated the catalytic activity of 2% Pd/gamma-Al2O3 and 2% Pd-1% Sn/gamma-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 Pd3d(5/2) electron binding energy values determined by XPS analysis. Sulfates formation and/or tin addition to Pd/Al2O3 resulted in an increase of the Pd3d(5/2) electron binding energy. Results showed a direct relation between Pd activity for CH4 oxidation and the degree of oxidation of I'd species.

• 出版日期2007-12