| abstract |
Provided is a catalyst composition capable of exhibiting excellent catalytic activity of Cu under high temperature, oxidation-reduction fluctuation, or even long-term use while reducing the use of noble metal elements. A catalyst composition containing a spinel composite oxide represented by the following general formula (1) is prepared. Since Cu is contained as a composition in a spinel-type composite oxide having a specific composition, aggregation of Cu fine particles can be suppressed even at high temperatures, under oxidation-reduction fluctuations, and even after long-term use, and a high Cu catalyst The activity can be retained. Costs can be reduced because high catalytic activity can be maintained without using noble metals. (M 1-x Cu x) O · nAl 2 O 3 (1) (In the formula, M represents at least one element selected from Mg, Fe, Co and Ni, x represents an atomic ratio of 0 <x ≦ 1, and n represents 0.08 to 5) .) [Selection figure] None |