CATALYST CARRIER AND MANUFACTURING METHOD THEREFOR

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PROBLEM TO BE SOLVED : To produce a catalyst which is provided with a catalyst carrier having a high oxygen absorbing/releasing performance. SOLUTION : The catalyst having the high oxygen absorbing/releasing performance can be obtained by using, as the catalyst carrier, A2O2SO4 (wherein A is a rare-earth element) obtained by firing a raw material being a sulfate of the rare-earth element in air at ≥800°C to decompose a part of the sulfate group. The catalyst carrier shown by the formula A2O2SO4 changes into A2O2S in a reducing atmosphere of high temperature (≥ about 800°C) while releasing the absorbed oxygen to the outside. The A2O2S changes into the A2O2SO4 in an oxidizing atmosphere while absorbing oxygen.