Engineering the valence state of ZIF-67 by Cu2O for efficient nonenzymatic glucose detection. Issue 14 (18th March 2020)

• Record Type: Journal Article
• Authors: Yang, Nian; Guo, Kailu; Zhang, Yanwen; Xu, Cailing
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 14(2020)
• Page Start: 2856
• Page End: 2861
• Publication Date: 2020-03-18
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Biomedical materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0tb00094a
• Languages: English
• ISSNs: 2050-750X

Abstract

Abstract : The valence state regulation of Co-based electrocatalysts is extremely important and greatly challenging to enhance the electrochemical performance toward glucose oxidation. Abstract : The valence state regulation of Co-based electrocatalysts is extremely important and greatly challenging to enhance the electrochemical performance toward glucose oxidation. Herein, Cu2 O@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 (Co 3+ ) in Cu2 O@ZIF-67 is much higher than that in the individual ZIF-67 due to the synergistic effects between ZIF-67 and Cu2 O. As a result, Co 3+ -rich Cu2 O@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 μA mM −1 cm −2 ) as well as a low detection limit (6.5 μM). This research provides a novel avenue for the progress of highly efficient electrocatalysts for nonenzymatic glucose oxidation.