Marigold Flower‐Shaped Metal–Organic Framework Supported Manganese Vanadium Oxide Electrocatalyst for Efficient Oxygen Evolution Reactions in an Alkaline Medium

The electrochemical oxygen evolution reaction (OER) is a key process in many renewable energy systems. The development of low‐cost, long‐lasting alternatives to precious‐metal catalysts, particularly functional electrocatalysts with high activity for OER processes, is crucial for reducing the operating expense and complexity of renewable energy generating systems. This work describes a concise method for generating marigold flower‐like metal–organic frameworks (MOFs) aided manganese vanadium oxide via a hydrothermal procedure for increased OER activity. As synthesized MOF MnV oxide has a higher surface area due to the 3D flower‐like structure, which is reinvented with enhanced electrocatalytic active sites. These distinctive structural features result in remarkable catalytic activity for MOF MnV oxide microflowers towards OER with a low overpotential of 310 mV at 50 mA cm−2 and a Tafel slope with only 51.4 mV dec−1 in alkaline conditions. This study provides a concise method for developing an optimized catalytic material with greater morphology and beneficial features for potential energy and environmental applications. Marigold flower‐shaped metal–organic framework assisted manganese vanadium oxide was synthesized using a facile hydrothermal approach and employed as electrocatalysts for electrochemical water oxidation. The electrocatalytic activity and stability of MOF MnV oxide microflower toward O2 evolution processes are superior. Water electrolyzers based on MOF MnV oxide microflower catalyst are comparable to those based on commercial IrO2 catalysts.