place at the end face lying opposite the layer composite produced in this manner is subjected to a heat treatment specifically a sintering treatment during which the catalytic converter structure shown in fig1 is formed however prior to the heat treatment what is known as a drawing process can optionally be implemented during which the composite body made up of catalytic layer 12 solid electrolyte layer 14 and electrodes 16 18 is subjected to for example a brief lateral elongation so that a wavy structure of the composite body is obtained this structure is retained in a subsequent heat treatment and or sintering process thereby resulting in an enlarged catalytically active surface of the obtained catalytic converter another exemplary embodiment of a catalytic converter according to the present invention is shown in fig2 matching reference numerals indicate the same module components as in the previous figures prior to the heat or sintering treatment the composite body made up of catalytic layer 12 solid electrolyte layer 14 and electrodes 16 18 is laminated together with an additional composite body of the same type both composite bodies having shared additional electrodes 18 this overall structure made up of two composite systems is then subjected to the heat or sintering treatment the result is the catalytic converter according to a second exemplary embodiment shown in fig2 if the overall structure made up of two composite systems is subjected to a drawing process prior to the heat or sintering treatment then a catalytic converter according to a third exemplary embodiment as shown in fig3 results after the sintering furthermore prior to the final heat or sintering treatment the catalytic converters according to the first to third exemplary embodiments may be rolled up about.