TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: Process (P1) further comprises calcination step of the specie obtained by electro-deposition. Preferred Components: The metallic support is chosen from metallic foam of FeCrAlY or NiCrAlY which are stable at up to 1000degreesC. The ceramic active phase layer is a compound of formula (D1)+(A-z/n)kH2O (preferably (Ni0.08Mg0.60Al0.32 (OH)2)-(SiO32-)0.16 kH20, (Ni0.08Rh0.0015Mg0.60Al0.3185(OH)2)0.32+ (SiO32-)0.16 kH20, (Rh0.005Mg0.71Al0.285 (OH)2)0.32+ (SiOs2-)0.16 kH20, (Ni0.01Rh0.0002Mg0.67Al0.3198 (OH)2)0.32+ (SiO32-)0.16 kH20, (Ni0.02Mg0.63Al0.35 (OH)2)0.35+(SiO32-)0.175 kH20, (Rh0.0004Mg0.65Al0.3496 (OH)2)0.35+(SiO32-)0.175 kH20, (Ni0.02Mg0.78Al0.20 (OH)2)0.35+(SiO32-)0.175 kH20, or (Rh0.0004Mg0.80Al0.1996 (OH)2)0.20+(SiO32-)0.10 kH20) or (A2z1A31-z1)(B11-x1-y1Nix1 Rhy1)O3-delta; (preferably (Laz1A11-z1)(Fe1-x1-y1Nix1 Rhy1)O3-delta; (Laz1Ce1-z1)(Fe1-x1-y1Nix1 Rhy1)O3-delta, more preferably LaFe0.7Ni0.25Rh0.05O3-delta;La0.8Ce0.2Fe0.7Ni0.25Rh0.05O3-delta; LaFe0.7Ni0.3O3-delta; LaFe0.95Rh0.05O3-delta; La0.8Ce0.2Fe0.7Ni0.3O3-delta)).A-=silicate or a polysilicate anion having valency n;D1=group of formula RhxNiyMglAlm(OH)2 having valency z;x=0-0.3 (preferably 0-0.1);y=0-0.9 (preferably 0-0.3);l=0-0.9 (preferably 0.3-0.8);m=0-0.5 (preferably 0.1-0.4);k=0-10 (preferably 0-5);x+y=greater than or equal to0;y+l=0.5-0.9 (preferably 0.6-0.8);x+y+l+m=1;z=total electrical charge of the cationic element;A1 and A2=Lanthanide or the Actinide families or from the group IIa of the Mendeleev's periodical table of elements (preferably La, Ce, Ca or Sr);A1=La;B1=transition metal groups of columns IIIb, IVb, Vb, VIb, VIIb, Ib and IIb and group VIIIb of the Mendeleev's periodical table of elements (preferably Mn, Fe or Co);delta=sub stoichiometric value of oxygen to obtain the electric neutrality of the Perovskite compound;x1=0-0.7;y1=0-0.5;x1+y1=0-0.8;z1=0-1. EXAMPLE - A Ni/Al Hydrotalcite compound was electro-synthesized. A thin film of Ni/Al Hydrotalcite compound was deposited on the pellet surface by cathodic reduction of an aqueous solution containing nickel nitrate (0.225 M), aluminum nitrate (0.075 M) and potassium nitrate (0.3 M). A test of electrochemical deposition of a Ni/Al Hydrotalcite on FeCrAlY foam was made with a time deposition of 1000 seconds. The obtained pellets were calcined at 900degreesC for 12 hours, to form ex HT Ni/Al deposited on FeCrAlY pellets and reduced in H2/N2 flow at 750degreesC. The catalytic activity as methane conversion and selectivity values in hydrogen and CO of the ex HT Ni/Al deposited on FeCrAlY in different reaction conditions was evaluated. The result showed that the sample was not active at 500degreesC and using the methane (CH4)/oxygen (O2)/helium (He)=2/1/20 vol.% mixture (far from thermodynamic conditions), but increasing the oven temperature at 750degreesC, the activity increases. The activities at 750degreesC of different feedings (CH4/O2/He=2/1/20, 2/1/4 and 2/1/1 vol.%) were comparable to that of the sample ex-HT Ni0.02Mg0.63Al0.35 and to classical catalysts (Rh on alumina 0.1 wt.%). The performances of a non optimized hydrotalcite deposited by electrochemical method on a metallic foam were close to those of the best sample of Hydrotalcite deposited on alumina by a standard method, or close to those of standard commercial catalyst constituted of 0.1 % Rh on a-alumina.