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Facile Synthesis of Pd Nanoparticle Modified Carbon Black for Electroanalysis: Application to the Detection of Hydrazine |
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| Authors: | Janjira Panchompoo Leigh Aldous Clive Downing Alison Crossley Richard G Compton |
| Institution: | 1. Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1?3QZ, UK tel: +44?(0)?1865?275?413;2. fax: +44?(0)?1865?275?410;3. Materials Department, University of Oxford, Parks Road, Oxford OX1?3PH, UK |
| Abstract: | Carbon black nanoparticles modified with palladium nanoparticles (Pd/CB) were prepared using a facile methodology. Stirring CB in an aqueous solution of palladium chloride was found to result in the spontaneous formation of Pd nanoparticles on the CB surface. The Pd/CB composite demonstrated high electrocatalytic activity towards hydrazine oxidation, with good stability and reproducibility. Three linear dynamic ranges of hydrazine determination were found between 5 µM and 50 mM. The limit of detection (LOD) for hydrazine was found to be 8.8 µM (based on 3σ). The sensitivity of unmodified CB to trace metal impurities present in certain common electrolytes is also noted. |
| Keywords: | Carbon black Palladium nanoparticles Hydrazine Hydrazinium cation Electrocatalytic oxidation |