Exhaust gas-purifying catalyst

An exhaust gas-purifying catalyst consisting of:

• a support provided with one or more through-holes through which exhaust gas flows;
• and
• a catalytic layer supported by the support and containing an oxygen storage material,
• wherein the exhaust gas-purifying catalyst includes a first section to which the exhaust gas is supplied, and a second section to which the exhaust gas having passed through the first section is supplied,
• wherein the catalytic layer includes a layered structure of a first catalytic layer containing platinum and/or palladium and a second catalytic layer containing rhodium in the first section and further includes a third catalytic layer containing rhodium in the second section,
• wherein a sum of platinum and palladium contents in the first catalytic layer per unit volumetric capacity is greater than a sum of platinum and palladium contents in the second catalytic layer per unit volumetric capacity and a sum of platinum and palladium contents in the third catalytic layer per unit volumetric capacity, and a rhodium content in the second catalytic layer per unit volumetric capacity and a rhodium content in the third catalytic layer per unit volumetric capacity are greater than a rhodium content in the first catalytic layer per unit volumetric capacity,
• wherein the second section is smaller in oxygen storage material content per unit volumetric capacity than the first section, and
• wherein a ratio of the oxygen storage material content in the third catalytic layer per unit volumetric capacity with respect to the oxygen storage material content in the first catalytic layer per unit volumetric capacity is in a range of 0.2 to 0.04.