Efficient and durable oxygen evolution reaction (OER) electrocatalysts made from earthabundant and cheap elements are keys to large-scale water splitting, which has attracted increasing attention due to the production of renewable H2 energy resource. The first-row transitional metals (Fe, Co, and Ni)-based catalysts are the most promising non-precious metalbased OER catalysts because of their earth abundance and low costs. Here, we for the first time discover a novel strategy to achieve an exceptional OER catalyst by growing Fe(PO3)2 on commercial Ni foam, which needs the lowest reported overpotential 265 mV to achieve a current density of 500 mA/cm2, and survives at such high current for a long period. This is the only catalyst that meets all the critical criteria for OER catalysts toward commercial use (500 mA/cm2 below 300 mV with good stability).