Self-template synthesis of hollow Fe-doped CoP prisms with enhanced oxygen evolution reaction activity  

作　　者：Xueda Ding Haitao Huang Qiang Wan Xu Guan Yuanxing Fang Sen Lin Dongyang Chen Zailai Xie 

机构地区：[1]College of Materials Science and Engineering,Fuzhou University,Fuzhou 350116,Fujian,China [2]Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials,College of Chemistry,Fuzhou University,Fuzhou 350116,Fujian,China

出　　处：《Journal of Energy Chemistry》2021年第11期415-422,I0009,共9页能源化学（英文版）

基　　金：Financial support from the National Natural Science Fundation of China(no.22072018,21703040,51873037 and 21973013).

摘　　要：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 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.

关 键 词：Prussian blue analogue Hollow structure Fe-doped CoP Oxygen evolution reaction 

分 类 号：TQ116.2[化学工程—无机化工] TQ426