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Development of an Electrochemical Sensor Nanoarray for Hydrazine Detection Using a Combinatorial Approach

2007; Wiley; Volume: 19; Issue: 10 Linguagem: Inglês

10.1002/elan.200703822

1521-4109

Ronan Baron, Biljana Šljukić, C. J. Salter, Alison Crossley, Richard G. Compton,

Advanced biosensing and bioanalysis techniques

Abstract The combinatorial screening of different metallic nanoparticles as electrocatalysts was investigated and efficiently applied for the detection of hydrazine. In a first step, glassy carbon microspheres decorated with metallic nanoparticles (Au, Pd, and Ag) were abrasively attached on the surface of a basal plane pyrolytic electrode giving a ‘multi–metal’ nanoarray. In a second step, electrodes modified with only one type of metallic nanoparticles allowed the identification of Pd as the unique catalytic material. In addition, a carbon‐epoxy composite electrode loaded with the Pd nanoparticles was then constructed for a practical use. The carbon‐epoxy composite nanoarray electrode was found to have excellent characteristics as for the sensing of hydrazine with a limit of detection of 2 μM.