Electro-catalytic honeycomb for exhaust emissions control and manufacturing method thereof

A manufacturing method of an electro-catalytic honeycomb for exhaust emissions control, comprising the steps of:

• step 1:
• providing a honeycomb structural body, the honeycomb structural body including a backbone, a solid-oxide layer, a cathode layer and an inner annular layer, the backbone having an anode and a plurality of gas channels running through the anode, the anode being made of a first porous material, as well as the anode having an outer surface and an inner surface situated inside the gas channels, the solid-oxide layer being formed of a first dense structure and formed on the inner surface, as well as having a tube wall facing the gas channels, the cathode layer being made of a second porous material and adhered to the tube wall, the inner annular layer being formed of a second dense structure and encapsulating an annular end edge of the outer surface;
• step 2:
• covering the inner annular layer by a sealing body in such a way that the gas channels of the honeycomb structural body are formed as an enclosed chamber, the sealing body including a hollow outer ring and a sealing membrane, a part of the hollow outer ring extending outwardly along an axial direction of the honeycomb structural body so as to be provided with an opening communicated with the gas channels after covering the inner annular layer, the sealing membrane sealing the opening;
• step 3:
• reducing the anode to a reducing environment;
• and
• step 4:
• covering the honeycomb structural body by an encapsulation so as to seal the outer surface and removing the sealing membrane of the sealing body for passing a lean-burn exhaust through the gas channels.