Nanostructured metallic FeNi2S4 with reconstruction to generate FeNi-based oxide as a highly-efficient oxygen evolution electrocatalyst. (March 2021)

• Record Type: Journal Article
• Authors: Jiang, Jun; Zhang, Ying-Jie; Zhu, Xiao-Jiao; Lu, Shu; Long, Lu-Lu; Chen, Jie-Jie
• Is Part Of: Nano energy. Volume 81(2021)
• Publication Date: 2021-03
• Subjects: FeNi2S4 -- Shape-Tunable -- Electrocatalyst -- Oxygen Evolution Reaction (OER) -- Structure-Reconstruction; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2020.105619
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: FeNi-based nanomaterials with bimetallic alloying effect deliver a great promise as an efficient electrocatalyst for oxygen evolution reaction (OER). However, the reconstruction to generate in-situ catalytically FeNi-based oxides or hydroxides during OER process and high electrical conductivity demand foster the great pursuit of the rational design of FeNi-based OER electrocatalyst a big challenge. Herein, we design and fabricate a nanostructured metallic FeNi2 S4 as a highly efficient OER electrocatalyst. This catalyst exhibits an overpotential of (250 mV) and a Tafel slope (62 mV dec −1 ), that outperforms the benchmark of commercial RuO2 . The experimental results demonstrate that the alloying effect and the superior electrical conductivity, endow it a great electrocatalytic performance. Such a nanostructured metallic OER electrocatalyst shows a great promise in water splitting. Graphical Abstract: Violarite FeNi2 S4 nanostructures with tunable shapes were synthesized via a facile colloidal strategy. Benefiting from the unique nanostructure features, the synergistic effect derived from Fe, Ni, S components, and in-situ rGO supporting as well as the reconstruction in the OER process, the prepared FeNi2 S4 nanoparticle (NPs) displayed excellent OER performance under alkaline electrolytes. ga1 Highlights: ● A colloidal method was provided to fabricate FeNi2 S4 nanostructure with adjustable shape. ● A high-efficiency OER electrocatalyst based on FeNi2 S4 nanomaterials was reported. ● The rGO support was proved to enhance the OER catalytic activity of FeNi2 S4 .