The improved electrochemical performance of\ud cross-linked 3D graphene nanoribbon monolith\ud electrodes

摘要

Technical advancement in the field of ultra-small sensors and devices demands the development of novel\udmicro- or nano-based architectures. Here we report the design and assembly of cross-linked three\uddimensional graphene nanoribbons (3D GNRs) using solution based covalent binding of individual 2D\udGNRs and demonstrate its electrochemical application as a 3D electrode. The enhanced performance of\ud3D GNRs over individual 2D GNRs is established using standard redox probes – [Ru(NH3)6]3+/2+,\ud[Fe(CN)6]3−/4− and important bio-analytes – dopamine and ascorbic acid. 3D GNRs are found to have\udhigh double layer capacitance (2482 μF cm−2) and faster electron transfer kinetics; their exceptional\udelectrocatalytic activity towards the oxygen reduction reaction is indicative of their potential over a wide\udrange of electrochemical applications. Moreover, this study opens a new platform for the design of novel\udpoint-of-care devices and electrodes for energy devices