“…Supported copper-based catalysts are extensively studied using different support materials, such as alumina, zirconia, , and mesoporous silica . Carbon materials in the presence or absence of additional metals are extensively used in NO x treatment. , Carbon-based materials loaded with transition metals, such as Co, Cr, and Cu, also reveal high activity in NO x reduction by CO below 300 °C in the absence of O 2 . Carbon nanotubes (CNTs) are interesting and competitive supports for heterogeneous catalysts given their high mechanical strength, high thermal and electrical conductivity and adsorption, unique nanostructure, mechanical and thermal properties, and hydrophobicity. , Previous research − indicated that CNT is a good option as a support because of the excellent properties of CNT in CO oxidation and NO reduction.…”