Reinforced exhaust treatment article, exhaust line, and methods

An exhaust treatment apparatus for treating exhaust gas, comprising:

• a reducing agent injector disposed on the exhaust line housing;
• a ceramic filter body comprising a first end and a second end opposite the first end, the ceramic filter body further comprising:
• a honeycomb structure extending from a first end face of the honeycomb structure at the first end of the ceramic filter body to a second end face at the second end of the ceramic filter body in an axial direction, the honeycomb structure formed by a plurality of intersecting porous ceramic walls defining a plurality of channels extending in the axial direction;
• a metal oxide coating disposed on at least one of the first end face or the second end face;
• and
• wherein the metal oxide coating comprises alumina nanoparticles with a median particle size between 10 nm and 50 nm and alumina microparticles with a median particle size between 0.1 μm and 20 μm.