Dealloying Synthesis of Bimetallic (Au–Pd)/CeO(2) Catalysts for CO Oxidation

[Image: see text] The nanorod-structured (Au–Pd)/CeO(2) catalysts with different Au/Pd ratios were prepared from Al–Ce–Au–Pd precursor alloys through combined dealloying and calcination treatment. XRD, SEM, TEM, XPS, Raman spectroscopy, and N(2) adsorption–desorption measurements were applied to test the structure and physicochemical properties of samples. Catalytic evaluation results imply that the (Pd(0.15)–Au(0.15))/CeO(2) catalyst calcined at 500 °C possesses optimal catalytic activity for CO oxidation when compared with other catalysts with different Au/Pd ratios or (Pd(0.15)-Au(0.15))/CeO(2) calcined at other temperatures, whose 50% and 99% reaction temperature can be reached as low as 50 and 85 °C, respectively. This superior catalytic property is attributed to their robust nanorod structure and the introduction of noble bimetal Pd and Au, which can construct a nanoscale interface to access fast electron motion, thus enhancing catalytic efficiency.