Gas purifying catalyst

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PROBLEM TO BE SOLVED : To provide a technique for reducing the amount of a noble metal to be used for a catalyst and preventing the catalyst from being poisoned by sulfur compounds. SOLUTION : This gas cleaning catalyst is provided with a perovskite type compound oxide shown by AxB2-xCO4-y(SO4)y(wherein A is a rare-earth element; B is an alkaline-earth element; C is a transition metal; 1≤xCOPYRIGHT : (C)2005, JPO&NCIPI