Insight into the potential application of CuOx/CeO2 catalysts for NO removal by CO: a perspective from the morphology and crystal-plane of CeO2

A series of copper oxide catalysts supported on cerium oxide particles with different morphologies (CuOx/CeO2-X) were fabricated and the catalytic performance (NO conversion, N-2 selectivity, and O-2/H2O/SO2 resistance) was evaluated in the NO + CO reaction. The results indicate that the catalytic performance is obviously impacted by the morphology and the crystal-plane of CeO2, where CuOx/CeO2-H exhibits 90% NO conversion at 215 degrees C, above 90% N-2 selectivity at 185 degrees C and strong O-2/H2O/SO2 resistance. Characterization analysis reveals that the excellent performance of the CuOx/CeO2-H catalyst originates from the surrounding (100) and (111) planes, which provides an optimal coordination environment of Cu2+ ions and enriches the active sites.

Automated summary

A series of copper oxide catalysts supported on cerium oxide particles with different morphologies were fabricated and their catalytic performance in the NO + CO reaction was evaluated. The results show that the morphology and crystal-plane of CeO2 significantly affect the catalytic performance. CuOx/CeO2-H catalyst exhibits excellent NO conversion, N-2 selectivity, and O-2/H2O/SO2 resistance due to the presence of (100) and (111) planes, which provide an optimal coordination environment for Cu2+ ions and enrich active sites.