New nanocomposites, poly(diphenylamine-co-3-aminobenzonitrile)/palladium (P(DPA-co-3ABN)/Pd) and poly(diphenylamine)/palladium (PDPA/Pd), have been prepared by pulse potentiostatic method and used as electrocatalysts for borohydride oxidation. Linear sweep voltammogram of P(DPA-co-3ABN)/Pd-ME exhibited the oxidation wave between -0.8 V and 0.4 V that corresponds to the direct, potentially four-electron, oxidation of borohydride ions. The peak current for borohydride oxidation is much higher at P(DPA-co-3ABN)/Pd-ME electrode as compared to PDPA/Pd-ME. The incorporation of 3ABN units augments electrocatalytic behavior and thermal stability for the P(DPA-co-3ABN)/Pd catalyst.
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