This work deals with the creation of bimetallic thin films on porous polymer membrane surfaces. Metal polymer composite membranes have been produced through magnetron sputtering. Commercially available membranes with both micrometer and nanometer scale pores were used as supports for deposition. Continuous alloy films of similar to 110 nm thickness were deposited to produce the top layer of the composite structure. These films were dealloyed with sulfuric acid creating a nanoporous film structure with a ligament size of 7.7 +/- 2.5 nm. The resulting composite membranes were permeable to water at all stages of production, and an polysulfone ultrafiltration membrane with 90 nm of nano porous Fe/Pd on top showed a flux of 183 L/m(2)/h (LMH)/bar. The films were evaluated for dechlorination of toxic polychlorinated biphenyls from water. At a loading of 6.6 mg/L Pd attached to 13.2 cm(2) support in a 2.5 ppm PCB-1 solution with 1.5 ppm dissolved H-2, over 90% of PCB-1 was removed from solution in 30 min, which produced the expected product biphenyl from the dechlorination reaction. The permeation of a 5 ppm PCB-1 solution resulted in a 28% degradation at a single pass through the composite membrane under H2 pressurization at a flux of 75 LMH.