Development of robust Al2S3/Sn2Bi2O7 nanohybrid as an active electrocatalyst for incredible oxygen evolution reaction via hydrothermal route

Developing a competent alternative electrocatalyst for hydrogen (H₂) synthesis through water oxidation is essential to meeting global energy demands and addressing climate-related issues. Forming a highly productive, affordable and effective catalyst is critical to enhancing the sluggish oxygen evolution reaction. The hydrothermal route was applied to develop an Al₂S₃/Sn₂Bi₂O₇ nanohybrid as a proficient catalyst for effective water electrolysis. Several physical methods assessed the developed nanohybrid's crystallinity, morphology, surface area, thermal stability. The morphology of the nanohybrid shows an increased surface area which enhances active spots with rapid charge transfer capability and prolongs the material's durability. The enormous surface area of the Al₂S₃/Sn₂Bi₂O₇ nanohybrid makes it an appropriate candidate for conducting the OER activity. The Al₂S₃/Sn₂Bi₂O₇ was deposited over nickel foam (NF) to evaluate the electrocatalytic nature. Electrochemical analysis indicated that the prepared nanohybrid has a minimal Tafel plot (38 mV/dec) and overpotential (198 mV) at 10 mA/cm² optimal current density. Al₂S₃/Sn₂Bi₂O₇ nanohybrid shows a reduced onset potential (1.25 V) and a remarkable endurance for 50 h. The electrochemical result shows that introducing Sn₂Bi₂O₇ into Al₂S₃ leads to a boosted surface area and more active spots and promotes the quick transfer of electrolytic ions. The developed nanohybrid can be exploited for other energy conversion applications.