Oxygen Evolution Reaction In article number 2300074, Ya-Pan Wu, Shuhui Sun, Dong-Sheng Li, and co-workers present a new electrochemistry-driven reconstruction strategy to fabricate the NiOOH/FeOOH heterostructure generated from metal–organic gels (MOG) precursor having first served as an efficient electrocatalyst for oxygen evolution reaction (OER). The reconstructed Re–FeNi–MOG-4 heterogeneous materials exhibit superior OER activity with a lower overpotential and a smaller Tafel slope and excellent stability.