Abstract
We report on a non-enzymatic amperometric sensor for hydrogen peroxide (H2O2). It was fabricated by electrodeposition of multi-wall carbon nanotubes and polyaniline along with platinum nanoparticles on the surface of a glassy carbon electrode. The modification was probed by scanning electron microscopy and cyclic voltammetry. The resulting sensor exhibits a high sensitivity (748.4 μA·mM−1·cm−2), a wide linear range (7.0 μM–2.5 mM), a low detection limit (2.0 μM) (S/N = 3), a short response time (>5 s), and long-term stability, and is not interfered by common species. It was successfully applied to determine H2O2 in disinfectants.
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