Catalyst in which metal is carried on inorganic porous body having hierarchical porous structure, and method for manufacturing said catalyst

A catalyst comprising:

• a granular carrier;
• and
• a metal obtained by reducing a metal ion supported on the granular carrier 1) in a supercritical state or 2) in a polar organic solvent,
• the granular carrier having a skeleton body composed of an inorganic compound comprising silica or titania, with a three-dimensional continuous network structure,
• the skeleton body having a bimodal hierarchical porous structure composed of a through-hole and a pore, the through-hole being formed in a void of the skeleton body, and the pore being extending from a surface to an inside of the skeleton body and dispersively formed on the surface,
• wherein a most frequent diameter of the pore, measured in nm, is within a range of 2 nm or more and 80 nm or less;
• wherein a most frequent diameter of the through-hole, measured in μm, is equal to or greater than five times the most frequent pore diameter of the pore, measured in nm, and is within a range of 0.1 μm or more and 10 μm or less, and
• wherein the metal is a platinum group element and/or a group 10 element.