Commercial Fecralloy stainless steel sheets 50 μm thick (Goodfellow, typical analysis Cr 22%, Al 4.8%, Si 0.3%, Y 0.3%, C 0.03%, Fe balance) were used as raw material. The foils were washed with water and soap, rinsed with acetone under sonication (30 min) and finally dried at room temperature. The micromonoliths were prepared by rolling together around an axis a flat and a corrugate sheet leading to a cylindrical-shaped body (L= 3 cm, Ø= 1.6 cm, 540 cm2 total surface area) resulting in parallel longitudinal channels (2063 cells per square inch). The micromonoliths were thermally pretreated in an oven at 900oC during 22 h in order to grow a rough, homogeneous and well adhered oxide scale layer, mainly composed by α-Al2O3, on the metallic surface. This layer easies the catalyst anchoring on the surface, by improving the physical adhesion and the chemical compatibility [33-34].