Journal
ANALYST
Volume 131, Issue 1, Pages 106-110Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b513751a
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We show that both a random distribution of palladium nanoparticles supported on a BDD electrode or a palladium plated BDD microelectrode array can each provide a sensing platform for the electrocatalytic detection of hydrazine. The palladium nanoparticle modified electrode displays a sensitivity and limit of detection of 60 mA mol(-1) L and 2.6 mu M respectively while the array has a sensitivity of 8 mA mol(-1) L with a detection limit of 1.8 mu M. The beneficial cost implications of using palladium nano- or micro-particles in sensors compared to a palladium macroelectrode are evident. Interestingly the array of the nanoparticles shows similar sensitivity and limit of detection to the microelectrode array which probably indicates that the random distribution of the former leads to 'clumps' of nanoparticles that effectively act as microelectrodes.
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