Abstract
A series of Ag/MnO2 catalysts employing MnO2 nanorods (MnO2-r) and nanoparticles (MnO2-n) as the supports were prepared by conventional incipient wetness impregnation. Their structures had been characterized by BET, SEM, TEM, XRD, H2-TPR, O2-TPD and XPS. The catalytic activities in HCHO oxidation had also been investigated. The results showed that MnO2-r and MnO2-n exhibited different reducibility and surface active oxygen. Ag/MnO2-r performed better reducibility and more surface active oxygen than that of Ag/MnO2-n. It had observed that Ag/MnO2-r could achieve complete oxidation of HCHO at 80 °C, due to the low-temperature reducibility and abundant surface active oxygen. Meanwhile, the Ag/MnO2-r catalyst exhibited good stability.
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