Catalyst for gasoline engine exhaust gas aftertreatment

A catalyst coated onto a gasoline particulate filter, said catalyst comprising:

• Pt;
• at least one functional additive chosen from magnesium oxide, calcium oxide, strontium oxide, barium oxide, gallium oxide, indium oxide, germanium oxide, antimony oxide, and mixtures thereof;
• a hydrothermally stable support material chosen from alumina, zirconia, ceria, silica, titania, a rare earth metal oxide other than ceria, and mixtures thereof;
• optionally a platinum group metal chosen from Rh, Pd, Ru, Ir, and mixtures thereof;
• and
• optionally a transition group metal chosen from Mn, Fe, Co, Ni, Cu, and mixtures thereof.