【摘 要】
：
Graphene has gained considerable attention in recent years due to its fascinating properties such as atom-thick 2D structure,high electrical conductivity,large specific surface area,and excellent elec
【机 构】
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Department of Chemistry,Renmin University of China,Beijing 100872,China
【出 处】
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2016年分析化学前沿国际研讨会及中美分析化学研讨会
论文部分内容阅读
Graphene has gained considerable attention in recent years due to its fascinating properties such as atom-thick 2D structure,high electrical conductivity,large specific surface area,and excellent electrochemical stability [1].Recently,Shis group reported that the monolayer of the graphene edge plane showed 4 orders of magnitude higher specific capacitance,a much faster electron transfer rate and stronger electrocatalytic activity than that of the graphene basal plane [2].In our previous work [3],a nanometer-thick linear graphene edge nanoelectrode was constructed based on the edge plane of CVD grown few-layer graphene,which showed much better electrochemical performance compared with traditional carbon fibre microelectrodes.Herein,the basal plane of CVD monolayer graphene was used to construct a graphene platform electrode(GPE)for electrochemically detecting dihydronicotinamide adenine dinucleotide(NADH).Caffeic acid(CFA)was immobilized on the surface of the activated graphene platform electrode(GPE)via electrodeposition.The CFA modified electrode showed a redox couple with an electrocatalytic peak at about 0.3 V(vs.Ag/AgCl)to NADH oxidation.Moreover,the electrocatalytic current increased linearly with NADH concentration in the range from 0.001 to 1.0 mM using differential pulse voltammetry.The as-made CFA-GPE is well suitable for quantitative analysis in sensing of NADH.
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