Recent observations of enhanced chemicurrent effects of heterogeneous reactions on porous MIM structures with an intrinsic potential barrier make them promising for novel sensing and energy conversion applications. This presentation describes relationships between morphological features of Pt/TiO<sub>2</sub/Ti nanostructures, derived from XRD and SEM studied, and chemicurrent production capabilities of this material system. In particular, samples containing anatase phase in the oxide film layer show significantly greater chemicurrent effect of catalytic hydrogen oxidation on the nanostructure surface and chemical to electrical energy conversion efficiency than those with a dominant rutile phase. Strategies of thin oxide film growth by plasma electrolytic oxidation method leading to porous anatase TiO<sub>2</sub thin films are also presented.