Efficient and durable oxygen reduction and evolution of a hydrothermally synthesized La(Co0.55Mn0.45)0.99O3-δ nanorod/graphene hybrid in alkaline media

被引：87

作者：

Ge, Xiaoming ^{[1
]}

Goh, F. W. Thomas ^{[1
]}

Li, Bing ^{[1
]}

Hor, T. S. Andy ^{[1
,2
]}

Zhang, Jie ^{[1
]}

Xiao, Peng ^{[3
]}

Wang, Xin ^{[3
]}

Zong, Yun ^{[1
]}

Liu, Zhaolin ^{[1
]}

机构：

[1] ASTAR, IMRE, Singapore 117602, Singapore

[2] Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore

[3] Nanyang Technol Univ, Sch Chem & Biochem Engn, Singapore 637459, Singapore

来源：

NANOSCALE | 2015年 / 7卷 / 19期

关键词：

NITROGEN-DOPED GRAPHENE; NONPRECIOUS METAL CATALYST; MAGNETIC-PROPERTIES; SPIN-STATE; PEROVSKITE; OXIDE; ELECTROCATALYST; NANOPARTICLES; TRANSPORT; SURFACE;

D O I：

10.1039/c5nr01272d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The increasing global energy demand and the depletion of fossil fuels have stimulated intense research on fuel cells and batteries. Oxygen electrocatalysis plays essential roles as the electrocatalytic reduction and evolution of di-oxygen are always the performance-limiting factors of these devices relying on oxygen electrochemistry. A novel perovskite with the formula La(Co0.55Mn0.45)(0.99)O3-delta (LCMO) is designed from molecular orbital principles. The hydrothermally synthesized LCMO nanorods have unique structural and chemical properties and possess high intrinsic activities for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The synergic covalent coupling between LCMO and NrGO enhances the bifunctional ORR and OER activities of the novel LCMO/NrGO hybrid catalyst. The ORR activity of LCMO/NrGO is comparable to the state-of-the-art Pt/C catalyst and its OER activity is competitive to the state-of-the-art Ir/C catalyst. LCMO/NrGO generally outperforms Pt/C and Ir/C with better bifunctional ORR and OER performance and operating durability. LCMO/NrGO represents a new class of low-cost, efficient and durable electrocatalysts for fuel cells, water electrolysers and batteries.

引用

页码：9046 / 9054

页数：9

共 55 条

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