Patent ID: 7576028

Claim:
A catalyst body comprising (1) a honeycomb carrier having at least one main component; (2) a catalyst layer comprising (a) an alkali metal, (b) a heat-resistant inorganic oxide, and (c) a noble metal loaded on the heat-resistant inorganic oxide, and (3) an anchor substance present by being added separately as an anchor substance in the catalyst layer that reacts predominantly with said alkali metal when compared with main components of the honeycomb carrier and which is at least one member selected from the group consisting of B, Si, P, S, Cl, V, Cr, Mn, Ga, Ge, As, Se, Br, Zr, Mo, Sn, Sb, I and W, whereby any reaction between main components of the carrier and said alkali metal is suppressed and the deterioration of the carrier is suppressed.