Ni and Fe doped Si-, C-, AlP-, AlN-nanotubes and nanocages as catalysts for N ₂ O reduction by CO and ethylene

Abstract The removing of the N 2 O and production of N 2 and O 2 with high performances are important reactions. The metal catalysts for N 2 O reduction have high price and low efficiency in normal temperature. Here. the new metal doped nanostructures as catalysts for N 2 O reduction are proposed with high efficiency. The possible reactions of acceptable mechanisms for N 2 O reduction on Ni-Si 36 , Ni-C 36 , Ni-Al 18 P 18 , Fe-C 42 , Fe-Al 21 N 21 , Fe and Ni doped CNTs and AlPNTs through the CO and ethylene are investigated. The capacities of Ni- and Fe-doped NTs for N 2 O reduction and CO 2 formation are compared with metal catalysts. Results shown that the Ni-Si 36 , Ni-C 36 , Ni-Al 18 P 18 , Fe-C 42 , Fe-Al 21 N 21 , Fe and Ni doped CNTs and AlPNTs have lower E activation than metal based catalysts. The O-N-N → O* + CO → CO 2 , O* + ethylene → ethylene oxide, O* + N 2 O → N 2 + O 2 pathways are proposed as effective mechanism for N 2 O reduction and CO 2 formation on surfaces of Ni- and Fe-doped NTs as catalysts. Finally, the Ni-Si 36 , Fe-Al 21 N 21 , Fe-AlNNT(5, 0) and Ni-AlPNT are proposed for N 2 O-R with high performance.