Bimetallic-MOF derived nickel-iron phosphide nanosheets on carbon cloth for efficacious oxygen evolution reaction. (15th October 2022)

• Record Type: Journal Article
• Authors: Chai, Ruiqing; Zhou, Tianqing; Sun, Daolai; Luo, Yuhong; Li, Jingde; Wu, Feichao
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 85(2022)
• Page Start: 36129
• Page End: 36138
• Publication Date: 2022-10-15
• Subjects: Oxygen evolution reaction -- Iron-nickel phosphide -- Self-supporting electrocatalyst -- Two-dimensional nanosheets; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.08.186
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: It is of momentously realistic significance to exploit highly efficacious and cost-effective non-noble metal electrocatalysts for oxygen evolution reaction (OER), considering its promising renewable energy application. Herein, a self-supporting electrocatalyst composed of nickel-iron phosphide nanosheets on carbon cloth (NiFeP@CC) is proposed for OER, which are derived from the phosphating treatment of two-dimensional NiFe-MOF nanosheets. The NiFeP@CC composite possesses the synergistic effect of bimetallic NiFe phosphides in promoting the OER, the fully exposed active sites of the nano-sheet structure and the fast charge/mass transfer from the hierarchical porous structure. Owing to the above structural features, the optimized NiFeP@CC presents an impressive OER performance in alkaline solution. The overpotential and Tafel slope are as low as 229 mV and 36.4 mV dec −1 under a current density of 10 mA cm −2, respectively, much superior to those for the commercial IrO2 catalyst. More excitingly, this self-supporting electrocatalyst also possesses an exceptionally high durability, showing no activity degradation for 25 h. This work offers a simple and feasible strategy for developing practically available OER catalysts with a high activity and stability. Graphical abstract: Image 1 Highlights: A self-supporting electrocatalyst of NiFeP nanosheets on carbon cloth was developed. The NiFe phosphides and the hierarchically nano-sheet structure jointly promote OER. The electrocatalyst delivers an impressive OER performance in alkaline solution.