CoP2/Fe-CoP2 yolk-shell nanoboxes as efficient electrocatalysts for the oxygen evolution reaction

被引：35
作者：
Ganesan, Vinoth [1 ]
Son, Jihye [1 ]
Kim, Jinkwon [1 ]
机构：
[1] Kongju Natl Univ, Dept Chem, 56 Gongjudaehak Ro, Gongju Si 32588, Chungnam Do, South Korea
来源：
NANOSCALE | 2021年 / 13卷 / 08期
基金：
新加坡国家研究基金会;
关键词：
53;
D O I：
10.1039/d0nr08108f
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The development of an efficient electrocatalyst is an important requirement for water splitting systems to produce clean and sustainable hydrogen fuel. Herein, we synthesized CoP2/Fe-CoP2 yolk-shell nanoboxes (YSBs) as efficient electrocatalysts for the oxygen evolution reaction (OER). Initially, zeolitic imidazolate framework-67/CoFe-Prussian blue analogue (ZIF-67/CoFe-PBA) YSBs were prepared by the reaction of ZIF-67 and [Fe(CN)(6)](3-) ions in the presence of a small amount of water as an etching agent. The size of the CoP2 yolk depends on the amount of water. The heteronanostructure composed of the CoP2 yolk and the FexCo1-xP2 shell with a cubic shape was obtained by phosphidation of ZIF-67/CoFe-PBA YSBs. Benefiting from the unique structure and chemical composition, the CoP2/Fe-CoP2 YSB electrocatalyst has a large specific surface area of 114 m(2) g(-1) and shows superior electrocatalytic performances for the OER such as a low overpotential of 266 mV, a small Tafel slope value of 68.1 mV dec(-1), and excellent cyclic stability.
引用
收藏
页码：4569 / 4575
页数：7
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