Article ID Journal Published Year Pages File Type
218675 Journal of Electroanalytical Chemistry 2014 5 Pages PDF
Abstract

•Pd-PEI/GO/GC electrode was constructed by layer-by-layer method.•The as-prepared Pd-PEI/GO/GC electrode exhibited high electrocatalytic activity toward the reduction of H2O2.•The Pd-PEI/GO/GC electrode demonstrated high stability for the detection of H2O2.

A novel enzyme-free hydrogen peroxide (H2O2) sensor was fabricated by coating graphene oxide (GO), branched polyethylenimine (PEI) and Pd particles in sequence on the surface of glassy carbon (GC) electrode (Pd-PEI/GO/GC). A layer-by-layer method was used, which involved π–π interactions, covalent bonding through 1-ethyl-3-[3-dimethylaminopropyl]carbodiimide/N-hydroxysulfosuccinimide (EDC/NHSS) chemistry, electrostatic adsorption and electroreduction. The Pd-PEI/GO/GC electrode exhibited high electrocatalytic activity, a low detection limit, and good stability for the detection of H2O2. The sensor’s practical application was tested via determination of H2O2 in real water samples.

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Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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