| 宋凤丹,李沅瑾,岳佳琪,齐随涛,杨伯伦.化学通报,2016,79(9):822-827. |
| Ni纳米催化剂的制备及其对葡萄糖电催化氧化的研究 |
| Preparation of Ni Nano Catalysts And the Activity For the Electrocatalytic Oxidation of Glucose |
| 投稿时间：2016-01-25 修订日期：2016-03-29 |
| DOI： |
| 中文关键词: Ni/AC 葡萄糖 电催化 氧化 循环伏安法 |
| 英文关键词:Ni/AC, Glucose, Electrocatalytic, Oxidation, Cyclic voltammetry |
| 基金项目:陕西省自然科学基金研究计划重点项目(2015JZ004) |
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| 中文摘要: |
| 采用等体积浸渍和程序升温还原的方法制备了不同Ni含量的Ni/AC纳米催化剂，并对其进行了形貌和结构表征。采用三电极体系和循环伏安法在碱性溶液中进行了其对葡萄糖催化氧化的电化学测试。结果表明，Ni/AC/GCE(修饰在玻碳电极上的Ni/AC)催化剂对葡萄糖有较强的电催化氧化作用。其中，20%的Ni/AC/GCE对葡萄糖电催化氧化作用最强，且随着葡萄糖浓度增加，响应电流显著增大，二者呈线性相关。20%Ni/AC/GCE催化剂对葡萄糖催化氧化的线性响应范围为0.2 mM ~ 6.5 mmol/L，相关系数为0.999，响应灵敏度是13.15 μA/(mmol/L)，最低检测限为35 μmol/L。稳定性测试结果表明，20%Ni/AC/GCE有着良好的稳定性，每隔两天测试，运行三周后其响应电流仍能维持在95%以上。 |
| 英文摘要: |
| Ni/AC nano catalysts with different Ni loading on activated carbon(AC) were prepared by incipient wetness impregnation and temperature programmed reduction method. Their morphology and structure were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS). Cyclic voltammetry were used to explore their activity for elctrocatalytic oxidation of glucose. The results showed that 20%Ni/AC/GC (Ni/AC nano catalyst was modified on a glassy carbon electrode) electrodes had a superior electrocatalytic activity for glucose oxidation. It brought a distinct and fast voltaic response in alkaline medium and the response current was significantly increased with the increase of glucose concentration. The linear response range of 20%Ni/AC/GCE was 0.2 ~ 6.5 mmol/L, the correlation coefficient was 0.999, the sensitivity was 13.15 μA/(mmol/L) and the lowest detectable limit was 35 μmol/L. It was found that the response current of 20%Ni/AC/GCE for glucose electrocatalytic oxidation could be able to reach 95% of the original current after three weeks when it was tested every three days, which indicates the Ni/AC/GCE electrode has a good stability. |
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