Synthesis and performance study of Fe2WO6@Ni3S2-WS2/NF for efficient electrolytic water to hydrogen

Hydrogen production from electrolytic water is a promising energy conversion method, which is green, low-carbon and environmentally friendly and it is essential to prepare efficient and low-cost electrocatalysts to improve the efficiency of water electrolysis. In this study, Fe 2 WO 6 @Ni 3 S 2 -WS 2 /NF was successfully synthesized by hydrothermal and electrodeposition methods, and its special nanoflower-like structure and synergistic effect among multi-components resulted in excellent catalytic performance and outstanding stability. The overpotential of Fe 2 WO 6 @Ni 3 S 2 -WS 2 /NF was 170 mV at 10 mA cm −2 in 1.0 M KOH for oxygen evolution reaction (OER) and it remains stable over 100 h, demonstrating its high catalytic activity and stability, making it suitable for prolonged OER processes. The increased activity of Fe 2 WO 6 @Ni 3 S 2 -WS 2 /NF can be attributed to the improved electron transport rate, the exposure of more active sites and the improved conductivity. This study provides a viable method for the preparation of efficient and robust OER catalysts.