High‐entropy materials represent a highly promising platform for electrocatalysis, offering exceptional stability and activity due to their multiple active sites and stabilization by high‐entropy, suitable for green hydrogen production via alkaline water electrolysis. Nonetheless, current challenges, such as limited miscibility among metal cations, restrict the advancement of high‐entropy materials through the maximization of the high‐entropy effect, highlighting the need for further research into the practical implementation of high‐entropy electrocatalysts. In this study, we propose and synthesize a nonprecious high‐entropy material composed of Co, Fe, Ni, Mo, Ti, and hetero‐polyatomic phosphorous anions (H‐PPAs) as a new family of H‐PPAs‐based electrocatalyst platform for efficient alkaline water splitting via electrodeposition. The amorphous structure of the material, reinforced by high configurational entropy and H‐PPA groups, not only remains stable but also promotes enhanced synergistic effects among metal cations, hence effectively modulating both the morphology and electronic structure of the active sites. This high‐entropy H‐PPAs‐based electrocatalyst achieves low overpotentials of 37 and 226 mV at a current density of 10 mA cm −2 for the hydrogen evolution reaction and oxygen evolution reaction, respectively, in alkaline electrolytes. Moreover, an anion exchange membrane water electrolyzer (AEMWE) employing the high‐entropy H‐PPAs‐based catalyst as bifunctional anode and cathode electrocatalysts operates at only 1.80 V to deliver a practically high current density of 1 A cm −2 , sustaining its performance for over 100 h and demonstrating the strong potential of high‐entropy materials in energy conversion applications.
Rosyara et al. (Thu,) studied this question.