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Facile preparation of urchin-like NiCo₂O₄ microspheres for efficient hydrogen peroxide detection.

ABSTRACT: In this work, urchin-like NiCo₂O₄ microspheres were prepared via a facile ionic liquid-assisted hydrothermal synthesis and used as non-enzymatic H₂O₂ sensors for the first time. The porous structure and high surface area of the NiCo₂O₄ microspheres provide plentiful active sites for electrocatalytic H₂O₂ oxidation. When adapted into an electrochemical sensor for H₂O₂, the microsensors showed fast response of 4 s, a high sensitivity of 392.5 μA·mM^-1 cm^-2, and a wide linear range towards H₂O₂ (0-14 mM). The detection limit was as low as 0.05 μM, significantly lower than other published high performance NiCo₂O₄-based H₂O₂ sensors. Furthermore, this non-enzymatic sensor exhibits good selectivity for H₂O₂. These results suggest that NiCo₂O₄ microspheres could be a promising material for trace H₂O₂ detection.

SUBMITTER: Jiang J

PROVIDER: S-EPMC9730448 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature

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Facile preparation of urchin-like NiCo2O4 microspheres for efficient hydrogen peroxide detection.

Jiang Jiaojiao J Zhang Zhixuan Z Yang Chong C Wang Rui R Wu Zhouling Z

RSC advances 20221208 54

In this work, urchin-like NiCo2O4 microspheres were prepared via a facile ionic liquid-assisted hydrothermal synthesis and used as non-enzymatic H2O2 sensors for the first time. The porous structure and high surface area of the NiCo2O4 microspheres provide plentiful active sites for electrocatalytic H2O2 oxidation. When adapted into an electrochemical sensor for H2O2, the microsen ...[more]

PMID: 36540244

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