Porous Carbon Template Decorated with MOF‐Driven Bimetallic Phosphide: A Suitable Heterostructure for the Production of Uninterrupted Green Hydrogen via Renewable Energy Storage Device

Abstract

AbstractWater splitting via an uninterrupted electrochemical process through hybrid energy storage devices generating continuous hydrogen is cost‐effective and green approach to address the looming energy and environmental crisis toward constant supply of hydrogen fuel in fuel cell driven automobile sector. The high surface area metal‐organic framework (MOF) driven bimetallic phosphides (ZnP2@CoP) on top of CNT‐carbon cloth matrix is utilized as positive and negative electrodes in energy storage devices and overall water splitting. The as‐prepared positive electrode exhibits excellent specific capacitances/capacity of 1600 F g−1/800 C g−1 @ 1A g−1 and the corresponding hybrid device reveals an energy density of 83.03 Wh kg−1 at power density of 749.9 W kg−1. Simultaneously, the electrocatalytic performance of heterostructure shows overpotentials of 90 mV@HER and 204 mV@OER at current density of 10 and 20 mA cm−2, respectively in alkaline electrocatalyzer. Undoubtedly, it shows overall water splitting with low cell voltage of 1.53 V@10 mA cm−2 having faradic and solar‐to‐hydrogen conversion efficiency of 98.81% and 9.94%, respectively. In addition, the real phase demonstration of the overall water‐splitting is performed where the electrocatalyzer is connected with a series of hybrid supercapacitor devices powered up by the 6 V standard silicon solar panel to produce uninterrupted green H2.