Copper-palladium alloy nanoparticle plated electrodes for the electrocatalytic determination of hydrazine

Abstract The preparation of copper–palladium alloy nanoparticle plated screen-printed carbon electrodes (SPE/Cu–Pd) and their use for the electrocatalytic determination of hydrazine in pH 7.4 phosphate buffer solution is described. X-ray photoelectron spectroscopic study indicates that the SPE/Cu–Pd prepared by successive electrochemical deposition of Cu and Pd is possessed of strong perturbed electronic interaction with a high Pd/Cu atomic ratio. Flow injection analysis of hydrazine using the SPE/Cu–Pd shows a linear detection range of 2–100 μM at an applied potential of +0.2 V versus Ag/AgCl with a current sensitivity and relative standard deviation of 0.21 μA/μM and 1.86%, respectively. The detection limit (S/N = 3) was 270 nM. Quantitative detection of hydrazine in cigarette tobacco was further demonstrated using the proposed electrode.

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