期刊
JOURNAL OF MATERIALS CHEMISTRY B
卷 8, 期 14, 页码 2856-2861出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0tb00094a
关键词
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资金
- Natural Science Foundation of China [21673105, 21503102, 21701071]
- Science and Technology Program of Gansu Province of China [17JR5RA194]
The valence state regulation of Co-based electrocatalysts is extremely important and greatly challenging to enhance the electrochemical performance toward glucose oxidation. Herein, Cu2O@ZIF-67 composites with fine-tuned valence states were rationally constructed for boosting glucose oxidation. X-ray photoelectron spectroscopy (XPS) and cyclic voltammetry (CV) analysis confirm that the content of the high valence state Co (Co3+) in Cu2O@ZIF-67 is much higher than that in the individual ZIF-67 due to the synergistic effects between ZIF-67 and Cu2O. As a result, Co3+-rich Cu2O@ZIF-67 composite exhibits remarkable activity toward glucose electro-oxidation with two linear response ranges of glucose concentration, from 0.01 to 10 mM and 10 to 16.3 mM, high sensitivities of the linear ranges (307.02 and 181.34 mu A mM(-1) cm(-2)) as well as a low detection limit (6.5 mu M). This research provides a novel avenue for the progress of highly efficient electrocatalysts for nonenzymatic glucose oxidation.
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