Free‐Standing and High‐Sensitive Electrodes with Hierarchical Nanostructures of Bimetallic Hydroxides M(OH)x/Cu(OH)2/CF (M=Ni, Co, Fe and Zn) for Glucose Detection

The National Natural Science Foundation of China (No. 51908408, 21776219 and 21872104) and the Science & Technology Development Fund of Tianjin Education Commission for Higher Education (2018KJ202) supported this research. The Natural Science Foundation of Tianjin for Distinguished Young Scholar (No. 20JCJQJC00150). As shown in the Schematic illustration, 3D free‐standing Cu‐based electrodes (M(OH)x/Cu(OH)2/CF) can be constructed with hierarchical nanostructures of bimetallic hydroxides via in situ growth process. the Ni(OH)2/Cu(OH)2/CF electrode displays a ultrahigh sensitivity, good selectivity and excellent stability for glucose detection. Besides, hierarchical nanostructures and synergistic effect of bimetallic hydroxides can effectively enhance interaction, promote the diffusion of ions and accelerate the charge transfer, which can further improve electrochemical properties of the electrodes.