Carbon coated hollow mesoporous FeP microcubes derived from Prussian blue were superior in catalytic activity and durability toward electrochemical hydrogen evolution with an overpotential of 115 mV to drive 10 mA cm−2.
Chemical doping with foreign atoms is an effective method to intrinsically modify the electronic properties of graphene. Besides, the hydration with metal oxide particles toward oxygen reduction with high activity can further improve its electro-catalysis performance. Furthermore, hierarchical structure can provide sufficient pathways to certify the diffusion of electrolyte and electron transfer. In this paper, we developed a novel three-dimensional nitrogen doped reduced graphene oxide/Manganese monoxide composite (3D-N-RGO/MnO) by incorporating covalent assembly and nitrogen doping. The as prepared 3D-N-RGO/MnO was further applied for oxygen reduction reaction (ORR). By the synergistic effect of three-dimensional nitrogen doped graphene (3D-N-RGO) and MnO, catalytic performance brings enhanced catalytic current and more positive potential. In addition, 3D-N-RGO/MnO exhibit excellent methanol tolerance and long-term stability.
Nitrogen doping plays a critical role in regulating the electronic properties of graphene, which has shown fascinating applications in bioelectronics and biosensors.Besides, the surface properties of graphene could be adjusted via chemical modification, which facilitate its use in composite materials. Furthermore, covalent assembly of graphene into ordered hierarchical structure provides an interconnected conductive network beneficial to electrolyte transfer on the electrode surface. In this paper, we developed a novel nitrogen doped reduced graphene oxide/Manganese monoxide composite (N-RGO/MnO) by incorporating covalent assembly and nitrogen doping. The as prepared N-RGO/MnO was further applied for highly selective and sensitive detection of dopamine (DA) in the presence of uric acid (UA) and ascorbic acid (AA) by differential pulse voltammetry. The separation of the oxidation peak potentials for DA-UA was about 131 mV. This excellent electrochemical performance can be attributed to the unique structure of N-RGO/MnO. The response of the electrochemical sensor varies linearly with the DA concentrations ranging from 10 µM to 180 µM with a detection limit of 3 µM (S/N=3). This work is promising to open new possibilities in the study of novel graphene nanostructure and promote its potential electrochemical applications.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.