Impact of different metallic forms of nickel on hydrogen evolution reaction. (September 2022)

• Record Type: Journal Article
• Authors: Lahiri, Abhishek; Lakshya, Annu Kumar; Guan, Shaoliang; Anguilano, Lorna; Chowdhury, Anirban
• Is Part Of: Scripta materialia. Number 218(2022)
• Publication Date: 2022-09
• Subjects: Hydrogen evolution reaction -- Lattice strain -- Nickel -- Alkaline solution -- Sea water; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2022.114829
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: In this work, we show the influence of strain in two different forms (plate and foil) of nickel for hydrogen evolution reaction (HER) in alkaline solution and 3.5% NaCl aqueous solution. The presence of tensile strain in nickel foil lowers the overpotential by about 10 mV to reach a current density of 10 mA cm −2 and improves the reaction kinetics of HER in alkaline solution. The Tafel slope showed a significant change in the strained nickel (i.e., in Ni foil) which gave a value of 111 mV dec −1 compared to unstrained nickel (Ni plate) which was found to be 151 mV dec −1, thus indicating a change in reaction mechanism. Compared to alkaline solution, the effect of strain becomes less pronounced in NaCl solution which can be attributed to Cl − adsorption on the electrode, thereby reducing its catalytic activity. Graphical abstract: Image, graphical abstract