Alleviating the reliance of non-renewable energy and switching to the green renewable energy is the key strategy to secure sustainable energy and the environment.[1], [2], [3], [4] Hence, switching of the fossil-based energy to the hydrogen (H2) economy can play an important role because H2 is an ideal energy resource owing to its superior energy density (142 MJkg−1) with zero CO2 emission.[5], [6], [7], [8] Green-hydrogen production via electrochemical water-splitting is the most desirable...
