Fe-doped CoP core–shell structure with open cages as efficient electrocatalyst for oxygen evolution  

作　　者：Jing-Yi Xie Zi-Zhang Liu Jia Li Lei Feng Min Yang Yu Ma Da-Peng Liu Lei Wang Yong-Ming Chai Bin Dong 

机构地区：[1]College of Science,State Key Laboratory of Heavy Oil Processing,China University of Petroleum(East China),Qingdao 266580,Shandong,China [2]Shandong Key Laboratory of Biochemical Analysis,College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Qingdao 266042,Shandong,China

出　　处：《Journal of Energy Chemistry》2020年第9期328-333,I0010,共7页能源化学（英文版）

基　　金：financially supported by Shandong Provincial Natural Science Foundation(ZR2017MB059);the Fundamental Research Funds for the Central Universities(18CX05016A);Postgraduate Innovation Project of China University of Petroleum(YCX2019096)。

摘　　要：Developing a facile approach based on transition metal-based Prussian blue(PB)and its analogues(PBAs)with core-shell nanostructure is a very promising choice for constructing cost-effective electrocatalysts for oxygen evolution reaction(OER).Herein,a bimetallic core-shell structure with open cages of Fe-doped CoP(Fe-CoP cage)has been synthesized using CoFe-PBA cage-4 as precursor through a facile hydrothermal method and following phosphating process.Interestingly,there is an open hole in each face center of Fe-CoP cage,which suggests the more exposure of active sites for OER.Electrochemical measurements show that Fe-CoP cage can afford a current density of 10 mA cm-2 at a low overpotential(300 mV),which is better than that of RuO2.The excellent performance can be attributed to Fe doping composition and unique open-cage core-shell structure.The synergistic effect derived from bimetallic active for OER has been discussed.And its great catalytic stability has been evaluated via 1000 cycles of CV and chronoamperometry measurement.This work provides a potential method to design multiple transitional metal-doping electrocatalysts with complex framework derived from PBAs for water splitting.

关 键 词：Core-shell structure CoFe-PBA Cation exchange PHOSPHATING Oxygen evolution reaction 

分 类 号：TQ426[化学工程] TQ116.2