The development of efficient,durable and low cost electrocatalysts is crucial but extremely challenging for the oxygen evolution reaction(OER).Herein,we develop a self-template strategy to synthesize hollow Fe-doped CoP prisms(Fe-CoP)via ion exchange of cobalt acetate hydroxide with[Fe(CN)6]3- and phosphorization-induced transformation of CoFe-PBA(Co/Fe-containing prussian blue analogue)prisms in N2 atmosphere.The obtained Fe-CoP not only inherits the hollow prism-like morphology of CoFe-PBA,but also forms rich mesoporous channel.The Fe-CoP prisms exhibit extraordinary OER performances in 1.0 M KOH,with a low overpotential of 236 mV to deliver a current density of 10 mA cm-2 and a low Tafel slope of 32.9 mV dec-1.Moreover,the presented electrocatalyst shows good long-term operating durabil-ity and activity.The XPS and TEM analysis confirm that Fe-CoP has undergone surface reconstruction in the process of electrocatalytic OER,and the in situ formed oxides and oxyhydroxides are the real active species to boost OER.This work provides a promising pathway to the design and synthesis of efficient and robust electrocatalysts with hierarchical hollow structure for boosting OER.