the fins of fin structure 110 a of the first plate 102 a are generally disposed between fins of fin structure 110 b of the second plate 102 b such a configuration results in an alternating lateral arrangement of a fin of fin structure 110 a from the first plate 102 a and a fin of fin structure 110 b from the second plate 102 b the fins 110 a and 110 b of the two plates 102 a and 102 b do not laterally touch or engage each other thus a fluid flow path is formed or exists between adjacent fins of fin structure 110 a and fin structure 110 b additionally the fins of fin structure 110 a and fin structure 110 b may be coated with a suitable catalytic material to assist in a desired reaction of products flowing through the reformer 100 examples of suitable catalytic materials include platinum palladium and alloys thereof as illustrated in fig3 and discussed herein a heat exchanger 112 may be associated with the first plate 102 a or the second plate 102 b or both plate 102 a and plate 102 b the heat exchanger 112 may include any suitable material configured to conduct heat away from the plate 102 a and to another device system or environment in one embodiment the heat exchanger 112 may include a fluid flowing through channels such as channels 108 u2032 of the recess 108 fig1 a such that the fluid carries the heat away from the plates 102 a and 102 b as such the fluid may carry transferred heat.