Sacrificial Template‐Derived CoMo‐LDH Gas Diffusion Electrode for Anion Exchange Membrane Water Electrolysis

Abstract Anion exchange membrane water electrolysis (AEMWE) offers a cost‐effective and efficient platform for hydrogen production by enabling the use of non‐platinum group metal (non‐PGM) electrode materials. However, the sluggish kinetics of the oxygen evolution reaction (OER) remains a key challenge. In this study, a CoMo‐LDH OER electrode for AEMWE is developed via a sacrificial template strategy. The high valence state of Mo promotes oxygen vacancy formation, enhancing OER performance. Electrochemical reconstruction also induces a phase transition into active (oxy)hydroxide species during OER. Density functional theory (DFT) calculations show that the weak OH − adsorption energy of CoMo‐LDH lowers the energy barrier for OH − deprotonation, improving catalytic activity. The CoMo‐LDH electrode demonstrates superior performance in AEMWE compared to the PGM‐based IrO 2 electrode. This study highlights the potential of sacrificial template‐based electrodes for high‐performance AEMWE.