| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an NO<SB POS="POST">x</SB>purifying catalyst that carries base metal, and an NO<SB POS="POST">x</SB>purifying catalytic apparatus capable of purifying NO<SB POS="POST">x</SB>with high efficiency. <P>SOLUTION: The No<SB POS="POST">x</SB>purifying catalyst contains Cu or Ni as active species. The particle diameter of nano-particles containing Cu or Ni or an oxide of either Cu or Ni carried by the carrier particles is 1.2 nm or greater, and the ratio between the carrying amount (mass%) and the particle diameter of the nano-particles (nm) is 0.125 or greater. A catalytic apparatus includes the catalyst provided in an exhaust gas passage of an internal combustion engine, and controls exhaust gas steadily to an atmosphere of A/F≤14.4 when Cu is the active species, and to an atmosphere of A/F≤14.2 when Ni is the active species. <P>COPYRIGHT: (C)2013,JPO&INPIT |
