Nanostructured porous copper–cobalt hexacyanocobaltate coordination polymer: An efficient electrocatalyst for high-performance non-enzymatic glucose sensing

초록

Reliable, high-quality glucose monitoring remains a significant challenge in the food industry, underscoring the need to develop cost-effective, high-performance glucose sensors. Herein, the CuCo(CN)<inf>6</inf> nanocomposite was successfully synthesized at room temperature via a facile co-precipitation method and utilized as a non-enzymatic electrode for electrochemical glucose detection. Benefiting from its well-defined cyanide-bridged framework, CuCo(CN)<inf>6</inf> exhibited exceptional electrocatalytic performance for glucose oxidation, achieving a high sensitivity of 1513.60 μA mM−1 cm−2, a broad linear range of 0.1–11 mM, and an ultralow detection limit of 0.45 μM. Moreover, it demonstrated a rapid response, excellent anti-interference capability, and stable operation over 16 days. Practical applicability was validated by determining glucose in commercial beverages (Black Tea, Pepsi, and Sprite; recoveries 94.44–103.70 %, RSD below 1.36 %) and human serum (recoveries 98.95–99.33 %, RSD not exceeding 1.04 %), demonstrating that CuCo(CN)<inf>6</inf> is a robust, high-performance platform for real-time glucose monitoring in both food and biological samples. © 2025 Elsevier Masson SAS

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