CoFeP nanocube-arrays based on Prussian blue analogues for accelerated oxygen evolution electrocatalysis

被引:33
作者
Xiong, Dengke [1 ]
Lu, Chunxiao [1 ]
Chen, Chen [1 ]
Wang, Jiang [1 ]
Kong, Yuxuan [1 ]
Liu, Tian [1 ]
Ying, Shuanglu [1 ]
Yi, Fei-Yan [1 ,2 ]
机构
[1] Ningbo Univ, Sch Mat Sci & Chem Engn, Ningbo 315211, Zhejiang, Peoples R China
[2] Key Lab Photoelect Detect Mat & Devices Zhejiang, Ningbo 315211, Peoples R China
基金
中国国家自然科学基金;
关键词
Prussian blue analogues (PBAs); Water splitting; Transition metal-based phosphides; Oxygen evolution reaction; Electrocatalysis; METAL-ORGANIC FRAMEWORKS; BIFUNCTIONAL ELECTROCATALYSTS; EFFICIENT; PHOSPHIDE; ALKALINE; DESIGN; OXIDE; NANOFRAMES; CATALYSTS; CARBON;
D O I
10.1016/j.jpowsour.2021.230884
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Exploring the replacement of novel metal-based electrocatalysts based on non-precious metal is still a challenge. Transition metal-based phosphides as a kind of highly efficient oxygen reaction (OER) catalyst is considered as a judicious select for renewable energy conversion and storage. In this work, CoFeP nanocube-arrays (NCAs) composite is successfully fabricated on a 3D porous conductive substrate (nickel foam), namely as CoFeP/NF. The CoFeP/NF material exhibits exciting electrocatalytic performance with extremely low overpotentials of 253 and 290 mV at the current density of 10 and 50 mA cm(-2) in 1 M KOH, respectively. Especially, remarkable durability for 100 h can be observed, which is a key parameter for practical application. CoFeP/NF parallel to Pt/C/NF as a two-electrode system is applied into overall water splitting. A series of outstanding electrocatalytic results are obtained, including a very low voltage of 1.54 V for achieving the current density of 10 mA cm(-2) with remarkable stability in 1 M KOH. These performances have far superior to commercial noble metal of IrO2/NF parallel to Pt/C/NF. Therefore, this work not only provides some practical electrocatalyst materials, more importantly, it opens a feasible and universal strategy for constructing well-defined nanocube-array electrocatalysts for energy storage and conversion.
引用
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页数:10
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