Pt Single-Atom Catalyst on Co<sub>3</sub>O<sub>4</sub> for the Electrocatalytic Detection of Glucose
Yong Zhang, Xin Zeng, Yiyi Liu, Cuncun Wang, Changpeng Jin, Jingzhou Hou, Mei Yang, Danqun Huo
Abstract
Developing an accurate, reliable, and stable glucose detection sensor poses a formidable challenge for the food industry. In this study, hydrothermal and wet chemical methods were employed to fabricate a Pt single-atom catalyst on Co 3 O 4 (Co 3 O 4 /Pt SAs), where dispersed Pt atoms collaboratively catalyze the electrochemical reaction on the electrode surface. Subsequently, the integration of the microelectrode with polyethylene glycol diacrylate (PEG-DA) hydrogel and a dual-channel microfluidic chip facilitated continuous and rapid glucose detection. The addition of 5% PEG-DA hydrogel served to eliminate interference and expedite glucose detection, while the design of the dual-channel microfluidic chip generated microscale vortices, providing ample reaction opportunities for the target glucose while preventing interference from the mixing of previous and current reaction solutions. The research exhibited a favorable linear detection range from 1 to 800 μM, with a detection limit of 0.84 μM. Furthermore, validation of the device’s feasibility in real samples demonstrated a glucose recovery rate ranging from 94.9 to 104.4% in beverages.