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Issue 54, 2019
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A high-energy-state biomimetic enzyme of oxygen-deficient MnTiO3 nanodiscs for sensitive electrochemical sensing of the superoxide anion

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Abstract

It is of great importance to determine the superoxide anion (O2˙), a kind of active free radical that plays important roles in catalytic and biological processes. We present here a high-energy-state biomimetic enzyme with extraordinary activity for O2˙ by inducing surface oxygen defects in MnTiO3 nanodiscs. Oxygen defects enable surface rich active Mn sites with high oxidation ability, which significantly promote the adsorption and electro-oxidation of O2˙. The oxygen deficient MnTiO3 towards O2˙ exhibits a sensitivity of 126.48 μA μM−1 cm−2 and a detection limit of 1.54 nM, among the best performance of O2˙ sensing platforms.

Graphical abstract: A high-energy-state biomimetic enzyme of oxygen-deficient MnTiO3 nanodiscs for sensitive electrochemical sensing of the superoxide anion

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Article information


Submitted
06 Apr 2019
Accepted
06 Jun 2019
First published
08 Jun 2019

Chem. Commun., 2019,55, 7836-7839
Article type
Communication

A high-energy-state biomimetic enzyme of oxygen-deficient MnTiO3 nanodiscs for sensitive electrochemical sensing of the superoxide anion

S. Zhao, Z. Shi, C. X. Guo and C. M. Li, Chem. Commun., 2019, 55, 7836
DOI: 10.1039/C9CC02679G

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