TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: Production of the structured catalyst further involves the following additional step to form a catalyst support: (h) subjecting the coated metal substrate, coated metal fiber mat or coated woven metal fiber assembly obtained after step (f) or step (g) to heat in an oxygen containing atmosphere for an additional period of time. The method also involves forming the coated metal substrate, coated metal fiber mat or coated woven metal fiber assembly into a catalyst structure before leaching; and/or forming the coated metal substrate, coated metal fiber mat or coated woven metal fiber assembly into a catalyst structure after passivating or after abrading, if abrasion is performed. In step (c), the coated metal substrate, coated metal fiber mat or coated woven metal fiber assembly is subjected to heat in a reducing atmosphere. The metal of the metal substrate, mat of metal fiber or woven metal fiber assembly is either: (a) primarily nickel; or (b) a grade 430 stainless steel. In addition to the aluminum, the metal powders are selected from zirconium (Zr), vanadium (V), chromium (Cr), cobalt (Co), titanium (Ti), tungsten (W), niobium (Nb), molybdenum (Mo), and tantalum (Ta). In step (c), the coated metal substrate, coated metal fiber mat or coated woven metal fiber assembly is subjected to a temperature of 650-950 degrees C. The acid is mineral acid or a carboxylic acid. The coated metal substrate is passivated using a solution comprising hydrogen peroxide (H2O2). The metal powders include powders made from alloys of two or more metals, where the alloys include alloys made from nickel (Ni) and Zr and alloys made from Ni and Cr. Producing the structured catalyst support further involves forming the coated metal substrate, coated metal fiber mat or coated woven metal fiber assembly into a catalyst structure after step (c); and/or forming the coated metal substrate, coated metal fiber mat or coated woven metal fiber assembly into a catalyst structure after step (d). The coated metal substrate, coated metal fiber mat or coated woven metal fiber assembly, after step (h), comprises an aluminum oxide coating as an outer layer and the method comprises the following additional step: impregnating at least a portion of the aluminum oxide outer layer with one or more catalytic substances. The coated and heat treated metal substrate, metal fiber mat or woven metal fiber assembly obtained from step (d), comprises an aluminum oxide coating as an outer layer and the method comprises the following additional step: impregnating at least a portion of the aluminum oxide outer layer with one or more catalytic substances. EXAMPLE - No suitable example given.