Advancing approaches for designing high-performance BiLaWO6/PPY nanocomposite for water splitting

The tungsten-based oxides have emerged as a potential electrocatalyst for (HER) hydrogen evolution reaction as well as (OER) oxygen evolution reaction. Notably, catalytic potential of tungsten oxides in the OER has yet to be studied. In present work, we offer a new nanoarray-structured electrode composed of BiLaWO₆/PPY. In alkaline conditions, this unique electrode catalyzes both the OER and HER with excellent stability and efficiency. In comparison to the reversible hydrogen electrode, BiLaWO₆/PPY nanoarray structure considerably increase hydrogen gas release from the electrode, generating a remarkable current density of 10 mA cm^− 2 at an initial potential of 245 mV with a 78 mV overpotential for HER. Furthermore, this BiLaWO₆/PPY nanocomposite displays Tafel slope of 64 mVdec^− 1. On other hand, the BiLaWO₆/PPY nanoarray shows good OER activity having 1.42 onset potential with overpotential of 244 mV. In order to validate the reaction process using current density of 10 mA cm^− 2, additionally, resulting material displays a Tafel slope (34 mVdec^− 1)for OER. This demonstrates that it is a promising non-noble metal catalyst for green water splitting using 1 M KOH. Consequently, the implementation of BiLaWO₆/PPY nanoarray in the context of this research signifies an innovative strategy for advancing OER electrocatalysts and other devices utilized in energy conversion and storage system.