The present invention relates to a new type of heterogeneous catalysts formed by a three-dimensional ceramic metal (cermet) structure, obtained by direct writing techniques (3D printing). One or more metals and one or more ceramic compounds in adequate proportions are used to make a paste (ink), whose rheological properties allow it to be extruded by 3D printing to form a pre-designed three-dimensional structure. After forming, the structure is processed thermally to obtain the consolidated cermet, with catalytically active metal phases in its body and on its surface.
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