Jiang Shuyao, Li Shasha, Xu Yanqiu, Liu Zhejun, Weng Shuting, Lin Mengxian, Xu Yanchao, Jiao Yang, Chen Jianrong
College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China; College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China.
College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China.
J Colloid Interface Sci. 2021 Oct 15;600:150-160. doi: 10.1016/j.jcis.2021.05.014. Epub 2021 May 6.
Although electrode materials based on metal organic frameworks (MOFs) were widely studied in the electrochemistry field, the origin of poor conductivity is still a bottleneck restricting their development. Herein, we constructed a conductive circuit by growing a layer of hydroxide on the surface of the Fe-MOF, and composite materials (Fe-MOF@Ni(OH)) are applied in the fields of supercapacitor, OER, and electrochemical sensing. Fe-MOF@Ni(OH) not only maintains the intrinsic advantages of Fe-MOF, but also improves the electrical conductivity. Fe-MOF@Ni(OH) exhibits a high specific capacity of 188 mAh g at 1 A g . The energy density of the asymmetric supercapacitor (Fe-MOF@Ni(OH)-20//AC) reaches 67.1 Wh kg. During the oxygen evolution reaction, the overpotential of the material is 280 mV at 10 mA cm, and the Tafel slope is 37.6 mV dec. The electrochemical sensing tests showed the detection limit of BPA is 5 μM. Hence, these results provide key insights into the design of multifunctional electrode materials.
尽管基于金属有机框架（MOF）的电极材料在电化学领域得到了广泛研究，但导电性差的根源仍是制约其发展的瓶颈。在此，我们通过在Fe-MOF表面生长一层氢氧化物构建了导电回路，并将复合材料（Fe-MOF@Ni(OH)）应用于超级电容器、析氧反应和电化学传感领域。Fe-MOF@Ni(OH)不仅保留了Fe-MOF的固有优势，还提高了电导率。Fe-MOF@Ni(OH)在1 A g 时表现出188 mAh g的高比容量。不对称超级电容器（Fe-MOF@Ni(OH)-20//AC）的能量密度达到67.1 Wh kg。在析氧反应过程中，该材料在10 mA cm时的过电位为280 mV，塔菲尔斜率为37.6 mV dec。电化学传感测试表明，双酚A的检测限为5 μM。因此，这些结果为多功能电极材料的设计提供了关键见解。
