Zhu Shasha, Lei Jinglei, Qin Yonghan, Zhang Lina, Lu Lijuan
College of Chemistry and Chemical Engineering, Chongqing University Chongqing 400044 China
College of Computer Science and Technology, Chongqing University of Posts and Telecommunications Chonqing 400065 China.
RSC Adv. 2019 Apr 30;9(23):13269-13274. doi: 10.1039/c9ra01802f. eCollection 2019 Apr 25.
The effect of the oxygen evolution reaction (OER) is important in water splitting. In this work, we develop sphere-like morphology spinel oxide CoFeO/NF by hydrothermal reaction and calcination, and the diameter of the spheres is about 111.1 nm. The CoFeO/NF catalyst exhibits excellent electrocatalytic performance with an overpotential of 273 mV at a current density of 10 mA cm and a Tafel slope of 78 mV dec. The cycling stability of CoFeO/NF is remarkable, and it only increased by 5 mV at a current density of 100 mA cm after 3000 cycles. Therefore, this simple method to prepare CoFeO/NF can enhance the OER properties of electrocatalysts, which makes CoFeO/NF a promising material to replace noble metal-based catalysts for the oxygen evolution reaction.
析氧反应（OER）在水分解过程中具有重要作用。在本工作中，我们通过水热反应和煅烧制备了球状形貌的尖晶石氧化物CoFeO/NF，球体直径约为111.1纳米。CoFeO/NF催化剂表现出优异的电催化性能，在电流密度为10 mA cm时过电位为273 mV，塔菲尔斜率为78 mV dec。CoFeO/NF的循环稳定性显著，在3000次循环后，在电流密度为100 mA cm时过电位仅增加了5 mV。因此，这种制备CoFeO/NF的简单方法能够增强电催化剂的析氧性能，这使得CoFeO/NF成为一种有前景的材料，可用于替代基于贵金属的析氧反应催化剂。
