SIC OpenIR
Efficient quantum dots anchored nanocomposite for highly active ORR/OER electrocatalyst of advanced metal-air batteries
Xu, Nengneng; Zhang, Yanxing; Zhang, Tao; Liu, Yuyu; Qiao, Jinli
2019-03-01
Source PublicationNANO ENERGY
ISSN2211-2855
Volume57Pages:176
SubtypeArticle
AbstractHigh activity bifunctional non-noble electrocatalysts, targeting both ORR and OER, are rationally designed by integrating the merits of both NiFe2O4 quantum dots and carbons nanotubes (CNTs) (NiFe2O4(QDs)/CNTs), which possesses large specific surface area (584 m(2) g(-1)), abundant NiFe2O4 quantum dots and superior conductivity. Specially, the mechanism for the formation of quantum dots in relation to Fe/Ni ratio and the corresponding activity of ORR and OER are studied carefully. Consequently, NiFe2O4(QDs)/CNTs exhibits superior bifunctional oxygen electrocatalytic activities with the lowest the potential difference (Delta E) of 0.9 V, outperforming well-known commercial Pt/C and IrO2, directly demonstrating the advantages of quantum dots catalysts on providing more effective actives sites and adsorption-desorption sites to promote oxygen reaction kinetics. NiFe2O4(QDs)/CNTs, as high-performance catalyst used in liquid and flexible metal-air batteries, realize high power density, high specific capacity, long-term rechargeability (over 800 h), and extremely low charge-discharge voltage gaps (only 0.62 V) in ambient atmosphere. Furthermore, the metal-air batteries with flexible configuration effectively prevent the migration of Zn2+/Mg2+, the production of carbonate and the hydrogen evolution reaction. Density functional theory calculations further illustrate that the NiFe2O4(QDs) on CNT has a very active ORR and OER site at the interface Ni site. The work offers prospects for the rational design of quantum dots containing composites to achieve their practicalities in next generation of metal-air batteries.
KeywordQuantum dot Bifunctional electrocatalyst Low voltage drop ORR/OER mechanism Metal-air battery
DOI10.1016/j.nanoen.2018.12.017
Language英语
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27313
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Xu, Nengneng,Zhang, Yanxing,Zhang, Tao,et al. Efficient quantum dots anchored nanocomposite for highly active ORR/OER electrocatalyst of advanced metal-air batteries[J]. NANO ENERGY,2019,57:176.
APA Xu, Nengneng,Zhang, Yanxing,Zhang, Tao,Liu, Yuyu,&Qiao, Jinli.(2019).Efficient quantum dots anchored nanocomposite for highly active ORR/OER electrocatalyst of advanced metal-air batteries.NANO ENERGY,57,176.
MLA Xu, Nengneng,et al."Efficient quantum dots anchored nanocomposite for highly active ORR/OER electrocatalyst of advanced metal-air batteries".NANO ENERGY 57(2019):176.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Xu, Nengneng]'s Articles
[Zhang, Yanxing]'s Articles
[Zhang, Tao]'s Articles
Baidu academic
Similar articles in Baidu academic
[Xu, Nengneng]'s Articles
[Zhang, Yanxing]'s Articles
[Zhang, Tao]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Xu, Nengneng]'s Articles
[Zhang, Yanxing]'s Articles
[Zhang, Tao]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.