Publication | Closed Access
Oxygen reduction catalysts for polymer electrolyte fuel cells from the pyrolysis of various transition metal acetates adsorbed on 3,4,9,10-perylene-tetra-carboxylic dianhydride
11
Citations
0
References
1999
Year
Materials ScienceOxygen Reduction ReactionChemical EngineeringEngineeringElectrolyzer CellOxygen Reduction CatalystsSingle-atom CatalystNanoheterogeneous CatalysisWater ElectrolyzersCatalysisCatalytic ActivityChemistryHydrogenElectrocatalytic Activity3,4,9,10-Perylene-tetra-carboxylic DianhydrideCatalyst PreparationVarious Transition MetalElectrochemistry
Electrocatalytic activity for the reduction of oxygen has been measured by rotating disk electrode for various transition metal acetates that have been adsorbed on perylene-tetra-carboxylic dianhydride (PTCDA) and then pyrolyzed at 900 degrees C in Ar:H{sub 2}:NH{sub 3} ambient. For each metal the electrocatalytic activity was observed to rise quickly with the metal content up to about 5000 ppm, at which point it saturates. Ni and Cu-based materials do not catalyse the electroreduction of oxygen. Catalyst performance have also been tested in H{sub 2}/O{sub 2} fuel cells at 80 degrees C. Test results for the Cr-, Mn-, Fe-, and Co-based materials showed that pyridinic type-N and the oxidized metal only exists for materials that show catalytic activity. Nitrile type-N also exhibits the same type of interaction although to a lesser degree. Materials that are not catalytically active show no such interactions. 46 refs., 2 tabs., 9 figs.