Abstract
This study regulates the electrocatalytic activity of Co3O4 nanomaterials based on quench-induced oxygen vacancies for boosting electrochemical sensing of glucose. Two different types of Co3O4 nanomaterials were synthesized by the hydrothermal method and high-temperature calcination. It was found that quenching induced abundant oxygen vacancy defects on the surface of Co3O4 nanomaterial. The presence of oxygen vacancy defects not only improves the conductivity of Co3O4 nanomaterials, but also enhances the adsorption of OH- and facilitates the creation of abundant active sites. The enriched oxygen vacancies boost the electrocatalytic activity of Co3O4 nanomaterials, enabling the sensor to detect glucose with an extremely high sensitivity of 1528.1 µA·mM−1·cm−2. Furthermore, the sensor can be utilized for detecting glucose in energy drinks. This study explores the structure-activity relationship between oxygen vacancies and electrocatalytic activity, providing insights for the development of high-performance sensing materials through the oxygen vacancy regulation strategy.
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