Gram-scale solvothermal synthesis of Fe-doped CuCoO<sub>2</sub> nanosheets and improvement of the oxygen evolution reaction performance
Miao Yang, Hao Tan, Shiyu Ma, Yue Mi, Lifeng Liu, Zong‐Yan Zhao, Hong Li, Dehua Xiong
Abstract
slightly increased (∼30.2 mV) after 18 hours of continuous OER. The crystal morphology and chemical composition did not change significantly before and after the long-term OER test, indicating that the 3FCCO nanosheets have good OER activity and stability. We have proposed two reasons for the significant improvement of OER performance for Fe-doped CCO nanosheets: (1) the partial substitution of Cu cations by Fe cations not only regulates the electronic structure of CCO, making the catalytically active center no longer a single Co site, but also contains the Fe site, thus increasing the number of overall active sites; (2) the synergistic effect between Fe cations and Co cations in the OER process could enhance the activity of a single active site.