| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an emission gas purification catalyst which reduces CO in an emission gas, and improves a CO shift capability in permeation and formation of H<SB>2</SB>even if it is applied to an internal combustion or the like, where an exhaust temperature is low, and an oxidative/reduction atmosphere is repeated in the emission gas. <P>SOLUTION: This relates to the emission gas purification catalyst in which Pt, Rh or Pd, and noble metals consisting of a voluntary combination of them and iron are carried by a heat-resistant inorganic oxide substrate, and which contains iron where a peak in XPS is in the vicinity of 711eV, and a method of producing the emission gas purification catalyst. Noble metals such Pt are carried by the heat-resistant inorganic oxide substrate, which is next impregnated with an iron-containing aqueous solution less than one hour, dried, and calcined to support the iron. The heat-resistant inorganic oxide substrate is impregnated with the iron-containing aqueous solution less than one hour, dried, and calcined to obtain the heat-resistant inorganic oxide supporting the iron, and next to support noble metals such Pt. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
