Abstract
Hydrogen from electrolysis cell driven by sustainable electricity is one of the most clean and renewable energy sources. The design and synthesis of efficient and robust noble-metal-free electrocatalyst for hydrogen evolution reaction (HER) are of paramount importance in modern society. Herein, we developed a simple two-step strategy to construct a new Ni/Co9S8 heterostructure using carbonised (900 °C) filter paper (FP) as a precious metal-free electrocatalyst for hydrogen evolution reaction (HER) in alkaline media. The optimized electrocatalyst can achieve an ultralow overpotentials of 76 mV for HER at 10 mA cm−2 in 1.0 M KOH. Moreover, it can be maintained a current density of 100 mA cm−2 at 380 mV (vs. RHE) for 37 h. More importantly, experimental and theoretical calculations reveal that the remarkable enhancement of HER activity could be attributed to the synergistic effect of Ni and Co9S8 that lead to the moderate hydrogen adsorption on Ni surface and improve the water dissociation at the interface of Ni/Co9S8. Our work paves a new pathway to design high-efficient electrocatalysts for massive hydrogen production.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.