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　N-2　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　durability　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.　(C)　2021　Science　Press　and　Dalian　Institute　of　Chemical　Physics,　Chinese　Academy　of　Sciences.　Published　by　ELSEVIER　B.V.　and　Science　Press.　All　rights　reserved.