A Promising Catalyst Au-Pt/Co_3O_4 for Low Temperature Combustion of Methane

Au/Co 3O 4 catalysts modified by Pt and Pd for the combustion of methane were investigated. It was found that the catalytic activity of Au/Co 3O 4 with a Au loading of 2%~5% for methane combustion can be greatly enhanced if a small amount of Pt, eg, 0.2%, was added. The temperature for methane total conversion can be decreased by 50 ℃ compared with Au/Co 3O 4. Pd, as an additive, was also tested, but no enhancement in activity was observed. The experimental results indicated that Au-Pt/Co 3O 4 catalyst could be a promising catalyst for the catalytic combustion of methane at low temperatures.