<p>The copper molybdate nanoparticles have proven promising as a potential electrocatalyst for the hydrogen evolution reaction (HER) as well as the oxygen evolution reaction (OER). There is currently a dearth of study on the catalytic potential of tungsten oxides in the oxygen evolution process. In this study, we introduce a new superaerophobic electrode with a Cu₃Mo₂O₉/CdS nanoarray structure. These unique electrode catalyses the HER in addition to OER shows remarkable stability and efficient functioning in alkaline conditions. In contrast to the conventional reversible hydrogen electrode, the Cu₃Mo₂O₉/CdS nanoarray configuration greatly enhances the electrode’s ability to discharge hydrogen gas. This leads to a remarkable current density of 10&#xa0;mA cm^− 2 at an initial potential of about 241 mV, which corresponds to a 252 mV overpotential following HER. Furthermore, the Tafel slope of this Cu₃Mo₂O₉/CdS nanocomposite is 39.71 mVdec^− 1. Conversely, the Cu₃Mo₂O₉/CdS nanoarray has a significant OER activity because of its 241 mV overpotential and 1.42 mV onsets potential. Additionally, the resulting material exhibits Tafel slopes of around 39.71, 48.67, and 176.4 mVdec^− 1, which are used to validate the reaction mechanism using a current density of 10&#xa0;mA cm^− 2. This suggests that the catalyst might be a non-noble metal that exhibits potential for water splitting when combined with 1&#xa0;M KOH. Therefore, this study’s utilization of Cu₃Mo₂O₉/CdS nanoarray is a novel strategy to creating OER electrocatalysts in addition to other parts that comprise energy conversion, storage, and delivery systems.</p> Graphical abstract <p></p>