Gold catalysts supported on the macroporous nanoparticles composited of cerium oxide for oxidation of formaldehyde

摘要

A series of Au/CeO_2 catalysts were synthesized and evaluated for formaldehyde catalytic combustion oxidation. In Au/CeO_2 catalysts, CeO_2 supports with different structure, Au/Macropor ous-CeO_2 is found to be superior catalyst for formaldehyde catalytic oxidation. According to the analysis of transmission electron microscopy (TEM), the pore size of Macroporous-CeO_2 is broader than that of mesoporous SBA-CeO_2 support, which could make the active species gold adequately disperse as small nanoparticles, furthermore, it is most noticed that macroporous CeO_2 support is benefit to mass transfer comparing with mesoporous SBA-CeO_2 and ordinary power CeO_2.