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通过酸腐蚀去合金法处理热扩散制备的铜基表面铜锌合金得到纳米多孔铜(NPC)材料.以NPC为载体,采用超声辅助化学镀制备Ni-B/NPC合金电极.X射线衍射(XRD)和扫描电镜(SEM)表明Ni-B/NPC电极呈现由高分散纳米颗粒组成的非晶态结构.计时电流法(CA)结果表明化学镀5 min制备的Ni-B/NPC电极具有最大的电化学活性表面积(EASA).循环伏安法(CV)结果表明,与块状镍电极相比,碱性介质中在Ni-B/NPC电极上葡萄糖起始氧化电位负移39mV,氧化峰电流提高了18.9倍.采用线性扫描伏安法(LSV)、CA和电化学阻抗谱(EIS)测定Ni-B/NPC电极对葡萄糖电催化氧化的电子转移系数(β)、电催化氧化反应速率常数(k)和葡萄糖的扩散系数(D)等动力学参数.结果表明高分散Ni-B/NPC非晶态合金电极对碱性介质中葡萄糖的氧化具有较高的电催化活性和稳定性.
The nano-porous copper (NPC) material was obtained by acid-etching alloying to treat the copper-zinc alloy surface prepared by thermal diffusion.The Ni-B / NPC alloy electrode was prepared by ultrasonic assisted electroless plating using NPC as support.XRD ) And scanning electron microscopy (SEM) showed that the Ni-B / NPC electrode exhibited an amorphous structure composed of highly dispersed nanoparticles.The chronoamperometry (CA) results showed that Ni-B / NPC electrode prepared by electroless plating for 5 min had the largest Electrochemical active surface area (EASA). Cyclic voltammetry (CV) results showed that compared with the bulk nickel electrode, the initial oxidation potential of glucose on Ni-B / NPC electrode in negative medium shifted by 39mV, Increased by 18.9 times.Electron transfer coefficient (β) of electrocatalytic oxidation of glucose on Ni-B / NPC electrode was measured by linear sweep voltammetry (LSV), CA and electrochemical impedance spectroscopy (EIS), and the electrocatalytic oxidation reaction rate constant (K) and glucose diffusion coefficient (D), etc. The results show that the highly dispersed Ni-B / NPC amorphous alloy electrode has high electrocatalytic activity and stability for the oxidation of glucose in alkaline medium.