Process for the preparation of a catalytic specie using electro-deposition

Abstract

Process for the preparation of a catalytic specie consisting essentially of a metallic support, which is coated with a ceramic active phase layer, mainly compound of the general formula (I):[RhNiMgAl(OH)](A)kHO,  (I)wherein Ais mainly a silicate or a polysilicate anion; 0≦x≦0.3; 0≦y≦0.9; 0≦l≦0.9; 0≦m≦0.5; 0≦k≦10; x+y>0; 0.5≦y+l≦0.9; x+y+l+m=1; and z is the total electrical charge of the cationic element or a compound of the general formula (II):[AA'][BNiRh]O  (II)wherein A and A′ are different and are selected from the Lanthanide or the Actinide families or from the group IIof the Mendeleev's periodical table of elements; B is selected from the transition metal groups of columns IIIb, IVb, Vb, VIb, VIIb, Ib and IIb and group VIIIb of the Mendeleev's periodical table of elements; 0≦x≦0.7, 0≦y≦0.5, 0≦x+y≦0.8, 0≦z≦1 andis the sub stoechiometric value of oxygen to obtain the electric neutrality of the Perovskite compound; said process essentially consisting in a step (a) of electro-deposition of said ceramic active phase on said metallic support. Use of said catalytic specie as a catalyst oxidation of gaseous hydrocarbons, to produce synthesis gas.