Graphene-based Ni/TiO2 nanocomposite electrode material for sustainable hydrogen evolution reaction

Electrochemical water splitting is an attractive, green, and renewable energy method for hydrogen production due to the abundance of water resources, zero pollution, and high purity. An efficient, stable, and low-cost electrocatalyst is essential for production of pure and clean hydrogen. A straightforward and economical method to synthesize electrocatalysts for efficient hydrogen evolution reaction (HER) is crucial for its practical application. Herein, we have synthesized and reported the application of Nickel-Titania over Graphene (Gr@Ni/TiO 2 ) nanocomposite which is reasonably efficient and highly durable. The catalyst (Gr@Ni/TiO 2 ) 0.2 and 0.4 M ratios were synthesized with the simple co-precipitation method. The standard three-electrode system is used to carry out the HER activity in 1M KOH solution. Due to high conductivity and specific surface area, the synthesized Gr@Ni/TiO 2 catalyst (0.4M) achieves low overpotential 101 mV at a current density of 20 mA cm −2 . With such electrocatalytic performance and environment friendliness, the Gr@Ni/TiO 2 holds significant promise toward efficient hydrogen production. • Hydrogen generation through electrocatalytic water splitting is recognized as a crucial technology for converting and storing energy in the form of hydrogen. • Noble metal oxides like Platinum, Iridium, and Ruthenium are good for electrocatalytic water splitting but are challenging to use on a large scale due to their limited availability and high cost. • In this study, we have developed a Nickel-Titania on Graphene (Gr@Ni/TiO2) nanocomposite. This innovative material is not only environmentally friendly and cost-effective but also offers diverse applications and benefits for societal and environmental protection. • The synthesized electrocatalyst features a high surface area, improved catalytic activity, and an adjustable bandgap.