“…To get around these restrictions, different composites of these materials were synthesized for electrocatalytic hydrogen evolution reactions, which have the advantages of being economical, noble, and toxic metal-free, environmentally friendly, and having extremely high stability. Conducting polymer-based nanocomposites with metals, bimetals, and their compounds emerged as one of the promising candidates for the HER in recent years due to the vibrant superiority of compositional and morphological flexibilities, easy synthesis, and tunable diversity. − Conducting polymer-based composite materials also has advantages concerning their cost-effectiveness, processability, and environmentally friendly and nontoxic nature. − Due to the synergistic effects of the polymer matrix and the nanofiller, conductive polymer nanocomposites are made conductive by combining a polymer matrix with nanofillers which exhibit excellent catalytic activity toward the HER. Conducting polymers that have been explored for the HER are polyaniline, polythiophene, polyindole, poly o -aminophenol, polypyrrole, , poly(3,4-ethylenedioxythiophene) (PEDOT) including their composites. ,, Polypyrrole (PPy) is a high potential material for energy conversion and storage .…”