OXYGEN ABSORBING-RELEASING MATERIAL AND EXHAUST GAS PURIFYING CATALYST CONTAINING THE SAME

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PROBLEM TO BE SOLVED : To provide an oxygen absorbing-releasing material which uses oxysulfide or oxysulfate of rare earths and has a high oxygen absorbing-releasing performance even at lower temperatures. SOLUTION : The oxygen absorbing-releasing material is characterized in that in a compound comprising Pr2O2SO4and/or Pr2O2S, at least a part of Pr is replaced by Ce. COPYRIGHT : (C)2009, JPO&INPIT