One-pot synthesis of NiFe foam-supported FeWO₄/Ni₃Se₂ nanocomposites and their enhanced electrocatalytic performance for oxygen evolution reaction

The development of composite nanocatalysts having strong interactions with electrode materials is important to enhance the reactivity and stability of catalysts used in electrochemical reactions. In this study, we report a method for directly growing FeWO₄/Ni₃Se₂ composite nanocatalysts on the nickel–iron foam (NFF) surfaces, utilizing nickel (Ni) and iron (Fe) in NFF as precursors for synthesizing Ni₃Se₂ and FeWO₄, respectively. The composite nanocatalysts, serving as electrode materials, are formed by the reaction of W precursor and Se precursors with NFF and exhibited high catalytic activity and long-term stability in oxygen and hydrogen evolution reactions.