“…In this respect, Cu-based metal–organic frameworks (MOFs) with mixed valent copper ions have been explored to achieve promising activity for electrocatalytic CO 2 RR and selectivity toward C 2 products. − MOFs with a wide structural variety and versatility have been explored in the last three decades. − The adjustable porosity, surface area, particle size and morphology, electronic conductivity, etc., make them suitable for different applications, including catalysis, gas storage separation, energy storage, sensor technology, etc. ,− …”