Electrocatalytic glucose oxidation is a very important reaction in glucose fuel cell and medical diagnosis, which is limited by sluggish reaction kinetics and low diffusion coefficient. Herein, a composite (donated as Ni6/AB) consisting of atomically precise nickel catalyst with defined crystal structure [Ni6(SC12H25)12] and acetylene black(AB) has been initiated as a novel and high-efficient non-noble metal catalyst for the electrochemical oxidation of glucose benefiting from its high exposure of active sites and increased electron/mass transport. The present Ni6/AB composites display the onset potential of +1.24 V and the maximum current density of 5 mA cm-2 at the potential of +1.47 V in the electrolyte of 0.1 M KOH with 5 mM glucose. This electrochemical performance is much superior to the alone nickel catalysts, acetylene black, and previous reported nanomaterials. Furthermore, the obtained Ni6/AB composites are also expected to find important application in the electrochemical detection of glucose due to its high electrochemical performance. The sensitivity and the detection of limit are determined to be 0.7709 mA cm-2 mM-1 and 1.9 μM, respectively. Our study demonstrates that atomically precise nickel catalysts on acetylene black could be potential promising materials for next-generation energy devices and electrochemical sensors.

中文翻译：

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乙炔黑上负载的镍催化剂，用于高效电化学氧化和葡萄糖的灵敏检测。

电催化葡萄糖氧化是葡萄糖燃料电池和医学诊断中非常重要的反应，它受反应动力学缓慢和扩散系数低的限制。在此，已经开始了由具有确定的晶体结构[Ni6（SC12H25）12]和乙炔黑（AB）的原子精确镍催化剂组成的复合材料（捐赠为Ni6 / AB），作为一种新型的高效非贵金属催化剂葡萄糖的电化学氧化得益于活性位点的高度暴露和增加的电子/质量传输。在具有5mM葡萄糖的0.1M KOH电解质中，本发明的Ni6 / AB复合材料在+ 1.47V的电势下显示+1.24 V的起始电势和5 mA cm-2的最大电流密度。这种电化学性能远远优于单独的镍催化剂，乙炔黑，和以前报道的纳米材料。此外，由于其高的电化学性能，预期获得的Ni 6 / AB复合材料也将在葡萄糖的电化学检测中找到重要的应用。灵敏度和极限检测分别确定为0.7709 mA cm-2 mM-1和1.9μM。我们的研究表明，乙炔黑上的原子精确镍催化剂可能是下一代能源设备和电化学传感器的有前途的材料。