Liquid-Phase Ethanol Oxidation and Gas-Phase CO Oxidation Reactions over M Doped (M = Ag, Au, Pd, and Ni) and MM′ Codoped CeO₂ Nanoparticles

Figure 6

1st (a) and 2nd (b) run temperature programmed CO oxidation conversion (%) profiles (a, b) of undoped CeO₂ and Au and Ag doped and codoped (5/0, 0/5, 4/1, 2.5/2.5, and 1/4 mol.%) CeO₂ catalysts. The difference (c) in T_10% between the metal doped and bare CeO₂ for the 1st and 2nd runs. The difference (d) in T_10% between the 1st and 2nd runs for the metal doped CeO₂ catalysts. Optical microscope images showed the color of the powder samples before and after CO oxidation reactions.

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(b)

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(d)

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