Electrochemical sensing platform based on the highly ordered mesoporous carbon-fullerene system.
In this paper, we report a novel all-carbon two-dimensionally ordered nanocomposite electrode system on the basis of the consideration of host-guest chemistry, which utilizes synergistic interactions between a nanostructured matrix of ordered mesoporous carbon (OMC) and an excellent electron acceptor of nanosized fullerene (C 60) to facilitate heterogeneous electron-transfer processes. The integration of OMC-C 60 by covalent interaction, especially its electrochemical applications for electrocatalysis, has not been explored thus far. Such integration may even appear to be counterintuitive because OMC and C 60 provide opposite electrochemical benefits in terms of facilitating heterogeneous electron-transfer processes. Nevertheless, the present work demonstrates the integration of OMC and C 60 can provide a remarkable synergistic augmentation of the current. To illuminate the concept, eight kinds of inorganic and organic electroactive compounds were employed to study the electrochemical response at an OMC-C 60 modified glassy carbon (OMC-C 60/GC) electrode for the first time, which shows more favorable electron-transfer kinetics than OMC/GC, carbon nanotube modified GC, C 60/GC, and GC electrodes. Such electrocatalytic behavior at OMC-C 60/GC electrode could be attributed to the unique physicochemical properties of OMC and C 60, especially the unusual host-guest synergy of OMC-C 60, which induced a substantial decrease in the overvoltage for NADH oxidation compared with GC electrode. The ability of OMC-C 60 to promote electron transfer not only suggests a new platform for the development of dehydrogenase-based bioelectrochemical devices but also indicates a potential of OMC-C 60 to be of a wide range of sensing applications because the electrocatalysis of different electroactive compounds at the OMC-C 60/GC electrode in this work should be a good model for constructing a novel and promising electrochemical sensing platform for further electrochemical detection of other biomolecules.
Zhou
Ming
M
Faculty of Chemistry, Northeast Normal University, Changchun, 130024, PR China.
Guo
Jidong
J
Guo
Li-ping
LP
Bai
Jing
J
D002244:Carbon / Q000737:chemistry*; D004563:Electrochemistry; D004566:Electrodes; D004583:Electrons; D037741:Fullerenes / Q000737:chemistry*; D007700:Kinetics; D008855:Microscopy, Electron, Scanning; D009243:NAD / Q000737:chemistry; D010084:Oxidation-Reduction; D016062:Porosity; D013057:Spectrum Analysis; D014961:X-Ray Diffraction
D037741:Fullerenes; D009243:NAD; D002244:Carbon