Gao Xiaohui, Feng Wenshuai, Xu Yan, Jiang Yifan, Huang Cong, Yi Yougen, Guo Aimin, Qiu Xiaoqing, Chen Wei
School of Physics and Electronics, Hunan Key Laboratory for Super-Microstructure and Ultrafast Process, Central South University, Changsha, 410083, Hunan, China.
College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, Hunan, China.
Nanoscale Res Lett. 2020 Jan 28;15(1):23. doi: 10.1186/s11671-019-3218-1.
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 Ni/AB) consisting of atomically precise nickel catalyst with defined crystal structure [Ni(SCH)] 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 Ni/AB composites display the onset potential of +1.24 V and the maximum current density of 5 mA cm 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 Ni/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 mM 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.
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，但受反应动力学缓慢和扩散系数低的限制。在此，一种由具有确定晶体结构的原子精确镍催化剂[Ni(SCH)]和乙炔黑（AB）组成的复合材料（命名为Ni/AB）已被开发为一种新型高效的非贵金属催化剂，用于葡萄糖的电化学氧化，这得益于其高活性位点暴露以及电子/质量传输的增加。在含有5 mM葡萄糖的0.1 M KOH电解液中，当前的Ni/AB复合材料在+1.47 V电位下显示出+1.24 V的起始电位和5 mA cm的最大电流密度。这种电化学性能远优于单独的镍催化剂、乙炔黑以及先前报道的纳米材料。此外，由于其高电化学性能，所获得的Ni/AB复合材料也有望在葡萄糖的电化学检测中找到重要应用。灵敏度和检测限分别确定为0.7709 mA cm mM和1.9 μM。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装置和电化学传感器的潜在有前途的材料。
