Exhaust gas-purifying three-way catalyst

An exhaust gas-purifying three-way catalyst comprising at least a catalyst carrier and a catalyst layer provided on at least one surface of the catalyst carrier,

• wherein:
• the catalyst layer has a layered structure comprising at least a first catalyst layer comprising a platinum group element, a second catalyst layer comprising a platinum group element, and a third catalyst layer as an outermost layer, comprising a platinum group element, in the listed order,
• the first catalyst layer comprises at least a first base material particle and a first composite catalyst particle comprising palladium at least supported on the first base material particle,
• the second catalyst layer comprises at least a second base material particle and a second composite catalyst particle comprising rhodium at least supported on the second base material particle,
• the third catalyst layer comprises at least a third base material particle and a third composite catalyst particle comprising palladium at least supported on the third base material particle, and
• a total coating weight Wt of the first to third catalyst layers, provided that the platinum group element of each of the catalyst layers is excluded, per volume of the catalyst carrier is 110 g/L or more and 225 g/L or less in total,
• wherein the first base material particle, the second base material particle, and the third base material particle each independently comprises an oxygen storage material comprising a ceria/zirconia-based composite oxide doped with at least one rare-earth element selected from the group consisting of scandium, yttrium, lanthanum, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium,
• wherein the ceria/zirconia-based composite oxide comprises, as constituent metal elements, Nd and Pr at the following mass proportions in terms of oxide and relative to a total mass of the ceria/zirconia-based composite oxide:
• CeO2 10 to 50% by mass;
• ZrO2 40 to 80% by mass;
• Nd2O3 0.1 to 10% by mass;
• and
• Pr5O11 0.1 to 10% by mass.