Fabrication of self-supporting structures made of washcoat materials (γ-Al2O3-CeO2) by ceramic stereolithography: Towards digital manufacturing of enhanced catalytic converters

•A novel fabrication method for catalytic converters using stereolithography is proposed.•A resin made of washcoat materials (γ-Al2O3-CeO2) is printed into self-supporting structures.•The addition of CeO2 to the plain γ-Al2O3 resin significantly reduces the curing depth.•Microstructure characterizations show hierarchical porosity of the printed structures.•Surface area measurements show that CeO2 stabilized the printed γ-Al2O3 at 1100 °C, not 900 °C.