Shell thickness controlled core-shell Fe3O4@CoO nanocrystals as efficient bifunctional catalysts for the oxygen reduction and evolution reactions

被引：46
|
作者：
Zhou, Lingshan [1 ,2 ]
Deng, Binglu [1 ,2 ]
Jiang, Zhongqing [3 ]
Jiang, Zhong-Jie [1 ,2 ]
机构：
[1] South China Univ Technol, Guangdong Engn & Technol Res Ctr Surface Chem Ene, Coll Environm & Energy, New Energy Res Inst, Guangzhou 510006, Guangdong, Peoples R China
[2] South China Univ Technol, Guangzhou Key Lab Surface Chem Energy Mat, Coll Environm & Energy, New Energy Res Inst, Guangzhou 510006, Guangdong, Peoples R China
[3] Zhejiang Sci Tech Univ, Dept Phys, Key Lab Opt Field Manipulat Zhejiang Prov, Hangzhou 310018, Peoples R China
来源：
CHEMICAL COMMUNICATIONS | 2019年 / 55卷 / 04期
关键词：
FE3O4; NANOPARTICLES; CARBON NANOTUBES; COBALT OXIDE; ELECTROCATALYSTS; PERFORMANCE; MECHANISM; GRAPHENE; HYBRID;
D O I：
10.1039/c8cc09140d
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Core-shell Fe3O4@CoO NCs have been demonstrated to be efficient bifunctional catalysts for the oxygen reduction (ORR) and evolution (OER) reactions. Their activities are strongly shell thickness dependent. Specifically, nanocrystals with approximate to 2 monolayers of CoO can exhibit a potential difference of 0.794 V at OER and ORR current densities of 10 and -3 mA cm(-2), respectively. This value is competitive to those of most active bifunctional catalysts reported. In addition, they are also used as the oxygen cathode for Zn-air batteries and can deliver a peak power density of 109 mW cm(-2), much higher than that of the Pt-RuO2/C (88.1 mW cm(-2)).
引用
收藏
页码：525 / 528
页数：4
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