期刊
ELECTROCHIMICA ACTA
卷 299, 期 -, 页码 470-478出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2019.01.033
关键词
Nanoporous; CuO nanowire; Dealloying; Glucose sensor; Electrocatalytic activity
资金
- National Natural Science Foundation of China [51871016, 51671018, 11790293, 51531001, 51671021]
- 111 Project [B07003]
- Program for Changjiang Scholars and Innovative Research Team in University of China [IRT_14R05]
- Projects of SKLAMM-USTB [2018Z-01, 2018Z-19]
- Top-Notch Young Talents Program
- Fundamental Research Funds for the Central Universities [FRF-TP-15-004C1, FRF-TP-18-004C1]
- Hong Kong Polytechnic University Postdoctoral Fellowships Scheme [1-YW3D]
Increasing demands for electrochemical glucose sensors with high overall performance have recently attracted intensive attention. Herein, we report a novel sandwich- like nanoarchitecture composed of uniform CuO nanowire array layers grown on the nanoporous Cu2O film, which was synthesized via annealing the nanoporous copper thin film obtained by dealloying Cu-based metallic glass precursors. The glucose sensor based on the newly developed CuO/Cu2O nanocomposite exhibits prominent overall electrocatalytic performance towards the oxidation of glucose with a wide linear dynamic detection range from 0.1 to 6mM, high sensitivity up to 1.95 mA/cm(2) mM, fast response time of less than 1.5 s, low detection limit of 1 mM(S/N = 3) as well as excellent selectivity. The enhanced electrocatalytic property of the nanocomposite is attributed to the high surface area originating from the in-situ grown CuO nanowire array structure and synergetic bi-continuous nanoporous Cu2O substrate. This finding not only provides promising candidates for blood glucose sensing, but also opens a new avenue to designing nanostructured catalysts for engineering applications in general. (C) 2019 Elsevier Ltd. All rights reserved.
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