High performance low noble metal triple effect catalyst

High performance low noble metal triple effect catalyst

  • CN 1,824,384 B
  • Filed: 01/13/2006
  • Issued: 01/05/2011
  • Est. Priority Date: 01/13/2006
  • Status: Active Grant
First Claim
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1. low noble metal Pt-Rh type cleaning catalyst for tail gases of automobiles is characterized in that composed as follows:

  • Pt powder by the refractory oxides load, the Rh powder of cerium compound oxide load, the NOx adsorbent of at least a composition in alkaline-earth metal Mg, Ba, the Sr oxide, constitute catalyst layer with at least a auxiliary agent of forming by the oxide of the oxide of rare earth element ce, Y, La, Nd, Sm and Zr, Ni, Fe, catalyst layer is coated on the matrix;

    Wherein, bullion content is 0.3-0.75g/L;

    Said cerium compound oxide is represented with following formula;

    Ce 0.10+xZr 0.75-xM yO 2-zWherein M represents one or more among alkaline-earth metal Ca, Mg, Ba, Sr or rare earth metal y, La, Pr, the Sm, z represents " O " room, x represents atomic ratio 0.00-0.70, y represents atomic ratio 0.00-0.20,0.10+x expression atomic ratio 0.10-0.80,0.75-x represents atomic ratio 0.05-0.75.

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