A honeycomb structure includes at least one honeycomb unit having a first end face and a second end face. The at least one honeycomb unit includes an inorganic binder, inorganic particles, and cell walls extending from the first end face to the second end face to define a plurality of cells. The inorganic particles include ceria particles doped with zirconia. A percentage by weight of zirconia doped in ceria in the ceria particles is in a range of about 20% to about 50%.