Thermal oxidation–electroreduction modified 3D NiCu for efficient alkaline hydrogen evolution reaction. (23rd June 2021)

• Record Type: Journal Article
• Authors: Zhou, Bo; Hu, Hanjun; Jiao, Zhiwei; Tang, Yang; Wan, Pingyu; Yuan, Qipeng; Hu, Qing; Yang, Xiao Jin
• Is Part Of: International journal of hydrogen energy. Volume 46:Number 43(2021)
• Page Start: 22292
• Page End: 22302
• Publication Date: 2021-06-23
• Subjects: Direct writing 3D printing -- Thermal oxidation–electroreducion -- Micro-nanostructure -- 3D NiCu -- Hydrogen evolution reaction; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2021.04.090
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The preparation of high-efficiency and low-cost electrocatalysts is vital to the development of green hydrogen energy. In this study, 3D NiCu electrodes with hierarchical micro-nano structure was constructed by a simple direct-write 3D printing technology and followed by the treatment of thermal oxidation - electroreduction steps. The composite structure of Cu NWs/Cu2 O and Ni/NiO in the prepared 3D NiCu promotes the dissociation of water and the conversion of hydrogen, and the special micro-nano structure displays a large active surface area. Therefore, the 3D NiCu exhibits a low overpotential of 70 mV to deliver a current density of 10 mA cm −2 . It demonstrates outstanding stability in the hydrogen evolution reaction experiment for 100 h in 1 M KOH. Overall, this research provides a pioneer of modified 3D printing to hydrogen production by water electrolysis. Graphical abstract: Image 1 Highlights: Bimetallic NiCu electrode was uniformly formed by direct-write 3D printing technology. Micro-nano structure was prepared through thermal oxidation – electroreduction. Prepared electrode show excellent HER performance in alkaline condition.