In-situ synthesis of porous Ni2P nanosheets for efficient and stable hydrogen evolution reaction. (1st March 2019)

• Record Type: Journal Article
• Authors: Jin, Xin; Li, Jing; Cui, Yuting; Liu, Xiaoyuan; Wang, Ke; Zhou, Yang; Yang, Wenjin; Zhang, Xinglai; Zhang, Cai; Jiang, Xin; Liu, Baodan
• Is Part Of: International journal of hydrogen energy. Volume 44:Number 12(2019)
• Page Start: 5739
• Page End: 5747
• Publication Date: 2019-03-01
• Subjects: Nickel phosphide -- In-situ synthesis -- Porous nanosheets -- Hydrogen evolution reaction -- Electrocatalysis; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.01.042
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The design and development of highly efficient and stable non-noble metal electrocatalysts for hydrogen evolution reaction (HER) have attracted increasing attention. However, some key issues related to large overpotential, high cost and poor stability at high current density still remains challenging. In this work, we report a facile in-situ integration strategy of porous Ni2 P nanosheet catalysts on 3D Ni foam framework (PNi2 P/NF) for efficient and stable HER in alkaline medium. The two-step method can creates high density of ultra-thin porous Ni2 P nanosheets firmly rooted into Ni foam substrate which can guarantee excellent electrical contacts, strong substrate adherence and large amount of active sites. Such a binder-free flexible HER cathode exhibits superior electrocatalytic performance with an overpotential of 134 mV at current density of 10 mA cm −2 . It also shows superior stability at higher current densities of 100 and 500 mA cm −2 for at least 48 h and negligible performance degradation is observed. Graphical abstract: Image 1 Porous Ni2 P nanosheets in-situ grown on Ni foam have been obtained to act as a promising HER electrode with excellent electrocatalytic activity and robust stability at high current density in alkaline medium. Highlights: Porous Ni2 P nanosheets have been in-situ grown on Ni foam. Ni2 P nanosheets show strong mechanical adherence with Ni foam substrate. The porous structure of Ni2 P nanosheets exhibit high activity towards HER. Ni2 P nanosheets also show superior HER stability at the high current density.