Direct synthesis of binder-free Ni–Fe–S on Ni foam as superior electrocatalysts for hydrogen evolution reaction. (22nd October 2022)

• Record Type: Journal Article
• Authors: Yang, Xu; Qiu, Rui; Lan, Ming-Jian; Chen, Gang; Xu, Wei; Shen, Yu
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 86(2022)
• Page Start: 36556
• Page End: 36565
• Publication Date: 2022-10-22
• Subjects: Ni–Fe–S -- Electrocatalyst -- Hydrogen evolution reaction -- Water splitting; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.08.231
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Designing the efficient, low-cost and stable electrocatalyst is of great significance for storage and conversion of the renewable energy to hydrogen. Herein, the binder-free Ni–Fe–S electrocatalysts were directly electrodeposited on Ni foam, which exhibited the excellent hydrogen evolution reaction performance with the overpotential of 51.4 mV at the current density of 10 mA cm −2 . Based on the analysis and results of as-synthesized Ni, Ni–Fe and Ni–S, the boosted electrocatalytic activity can be attributed to the composite effect between Ni and the introduced Fe and S. Additionally, the Ni–Fe–S electrocatalysts also displayed the low cell voltage (1.59 V at 10 mA cm −2 ), remarkable durability and high Faraday efficiency in overall water electrocatalysis. Moreover, the water electrolysis device with Ni–Fe–S bi-electrodes can be driven by a small wind power generation and producing 4 mL H2 in 39 min, indicating the prepared Ni–Fe–S electrocatalyst has the great potentials in producing hydrogen via renewable energy. Highlights: Binder-free Ni–Fe–S electrocatalysts were directly electrodeposited on Ni foam. Ni–Fe–S electrocatalysts exhibited the boosted HER and water splitting performance. The enhanced electrocatalytic performance is due to the composite effect between Ni, Fe and S. Electrolyzer with Ni–Fe–S bi-electrodes can be driven by a small wind power generator.