Sensitive Hydrogen Peroxide Sensor Based on Hexacyanoferrate Nickel–Carbon Nanodots
An electrochemical sensor was developed for the detection of hydrogen peroxide (H2O2) based on the in situ formation of a nickel hexacyanoferrate complex on the electrode surface. Screen-printed carbon electrodes were modified with nickel-doped carbon nanodots (Ni-CNDs), and a nickel hexacyanoferrat...
| Autores: | , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:dnet:biblosearchi::ff13c4e31a25e048e97a37d0c131941b |
| Acceso en línea: | https://hdl.handle.net/10486/760002 https://dx.doi.org/10.3390/chemosensors13060195 |
| Access Level: | acceso abierto |
| Palabra clave: | Electrochemical sensor nickel-doped carbon nanodots (Ni-CNDs) nickel hexacyanoferrate complex (Ni-HCF) hydrogen peroxide (H2O2) Química |
| Sumario: | An electrochemical sensor was developed for the detection of hydrogen peroxide (H2O2) based on the in situ formation of a nickel hexacyanoferrate complex on the electrode surface. Screen-printed carbon electrodes were modified with nickel-doped carbon nanodots (Ni-CNDs), and a nickel hexacyanoferrate complex was electrogenerated over the nickel carbon nanodots. Ni-CNDs were synthetized “a la carte” in one step by including nickel (II) acetate as precursor and characterized using different techniques: transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy, atomic force microscopy (AFM), and infrared spectroscopy (FTIR). The electrocatalytic activity toward H2O2 reduction and the oxidation of the resulting modified electrodes was studied. The developed sensor had a strong electrocatalytic effect on the oxidation and reduction of H2O2, yielding detection limits of 3.22 and 0.49 µM, respectively. The H2O2 content of a tap water sample was determined, confirming the viability of the developed electrochemical sensor |
|---|