Minireview: Fe–Ni and Fe–Co LDH/MOF electrocatalysts for oxygen evolution reaction in electrocatalytic water splitting
摘要
Renewable energy generation via electrocatalysis is a clean, environmentally friendly pathway. However, the oxygen evolution reaction (OER) using non-precious metals remains a competitive technology. A novel electrocatalyst is introduced that exhibits outstanding OER activity. Among them, 2D metal-organic frameworks (MOFs) and layered double hydroxides (LDHs) have gained significant attention as electrocatalysts for OER generation, particularly when incorporating Fe-based bimetallic Ni-Co materials. In this context, Fe-based bimetallic systems, particularly NiFe- and CoFe-based catalysts, have emerged as highly efficient alternatives to noble metal oxides. This review focuses on layered double hydroxide/metal–organic framework (LDH/MOF) hybrid structures, with special emphasis on NiFe-LDH/MOF and CoFe-LDH/MOF electrocatalysts for alkaline OER. A variety of methodologies, such as preparation methods, compositions, mixtures, and supporting materials, will improve catalytic performance, as outlined. Alongside this, details of OER performance, Tafel slope, overpotential, and surface area measurements are compared and presented under the evaluation criteria. In conclusion, the key insights into Fe-based Ni and Co LDHs in relation to MOFs and future advancements are outlined.