3 years ago

Mesoporous Silica-Supported Nanostructured PdO/CeO2 Catalysts for Low-Temperature Methane Oxidation

Mesoporous Silica-Supported
Nanostructured PdO/CeO2 Catalysts for Low-Temperature Methane
Oxidation
Michael O. Wolf, Chujie Zhu, Vanama Pavan Kumar, Yiling Dai, Mark J. MacLachlan, Kevin J. Smith
Nanostructured PdO/CeO2 supported on mesoporous SBA-15 silica was synthesized using a combination of incipient wetness impregnation and surface-assisted reduction. After calcination, the materials showed good activity as catalysts for the low-temperature oxidation of methane, with a sample having 5 wt % Pd loading showing 50% conversion to CO2 at ∼290 °C and complete conversion below 360 °C. The stability of catalysts in the presence of water was studied. The formation of Pd(0) during the methane oxidation reaction increases the oxygen vacancies on the surface of catalysts, improving the catalytic activity.

Publisher URL: http://dx.doi.org/10.1021/acsami.7b13408

DOI: 10.1021/acsami.7b13408

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