Superior hydrogen evolution electrocatalysis enabled by CoP nanowire array on graphite felt

• Published in: International journal of hydrogen energy 2022-01, Vol.47 (6), p.3580-3586
• Main Authors: Ren, Yuchun, Li, Zerong, Deng, Biao, Ye, Chen, Zhang, Longcheng, Wang, Yan, Li, Tingshuai, Liu, Qian, Cui, Guanwei, Asiri, Abdullah M., Luo, Yonglan, Sun, Xuping
• Format: Article
• Language: English
• Subjects: Alkaline media; CoP; Electrocatalyst; Graphite felt; Hydrogen evolution
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2021.11.039

Renewable electricity-powered hydrogen production is an attractive alternative to unsustainable industrial processes, but the large-scale implantation of such sustainable technology still requires efficient and noble-metal-free electrocatalysts for driving cathodic hydrogen evolution reaction (HER), especially under alkaline conditions. In this paper, CoP nanowire array was in-situ developed on porous graphite felt (CoP/GF) as a new 3D electrocatalyst in facilitating hydrogen evolution electrocatalysis. This CoP/GF presents outstanding HER activity, requiring a low overpotential of 130 mV to deliver a current density of 20 mA cm−2 as tested in 1.0 M KOH. Furthermore, this free-standing catalyst exhibits impressive long-term durability of up to 50 h under working conditions. •CoP nanowire array was developed on graphite felt as a 3D electrocatalyst.•CoP/GF presents outstanding hydrogen evolution reaction performance.•CoP/GF exhibits impressive long-term durability of up to 50 h under working conditions.