1. NiFeCo selenide nanosheets as promising electrocatalysts for oxygen evolution reaction.
- Author
-
Zhang, Jie, Zhang, Shun, Zhang, Zehui, Wang, Jianfeng, Zhang, Zhonghua, and Cheng, Guanhua
- Subjects
- *
OXYGEN evolution reactions , *SELENIDES , *METALS , *HYDROGEN evolution reactions , *ELECTROCATALYSTS , *NANOSTRUCTURED materials , *ALKALINE solutions - Abstract
Exploring highly efficient and robust electrocatalysts to replace the noble metal-based electrocatalysts for alkaline oxygen evolution reaction (OER) is vital and challenging for the conversion of renewable energy. Herein, a novel element incorporation strategy is proposed to synthesize the multi-metallic selenide of (Ni,Fe,Co)Se 2 nanosheets anchored on a stainless steel mesh substrate (NiFeCoSe/SSM). The multi-metallic hybrid film (NiFeCo/SSM) obtained by a co-sputtering method is converted to the (Ni,Fe,Co)Se 2 nanosheets through an alloying-dealloying-selenization process, in which Co and Fe atoms replace part of Ni atoms in the NiSe 2 lattice. The as-obtained NiFeCoSe/SSM displays efficient OER performances in alkaline solutions with an overpotential of 228 mV at 20 mA cm−2 (268 mV at 50 mA cm−2), and a small Tafel slope of 69.8 mV dec−1 in 1.0 M KOH. Furthermore, the NiFeCoSe/SSM electrode demonstrates a remarkable catalytic stability as long as 24.0 h, and its initial nanosheet structure can be well retained after the durability test. Such excellent OER performances of NiFeCoSe/SSM can be attributed to the unique nanosheet structure and the optimized electronic structure due to the synergistic effect among different metallic elements. • A novel element incorporation strategy is proposed to obtain multi-metallic selenide. • Co and Fe atoms replace part of Ni atoms in the NiSe 2 lattice. • The NiFeCoSe/SSM displays efficient OER performances in alkaline solution. • Synergistic effect among metallic elements causes optimized electronic structure. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF