Abstract
To understand the second doped metal influence on catalytic activity for N2O decomposition, the mechanisms of N2O decomposition over Rh-M(M = Co, Ni and Cu) bimetallic catalysts were investigated by density functional theory (DFT). Co doped into Rh catalyst can increase the activity for N2O decomposition due to the decrease of the activation energy of rate-determining step while Ni and Cu present contrary performance. A series of corresponding RhM catalysts supported on SBA-15 was prepared and applied in N2O catalytic decomposition. The catalytic activity trend of Rh-M catalysts for N2O decomposition is determined as Rh7Co1/SBA-15 > Rh/SBA-15 > Rh7Ni1/SBA-15 > Rh7Cu1/SBA-15, which is in consistency with the corresponding DFT calculation results.
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