Mass-production of mesoporous MnCo₂O₄ spinels with manganese(IV)- and cobalt(II)-rich surfaces for superior bifunctional oxygen electrocatalysis
|Author:||Wang, Wenhai1; Kuai, Long1; Cao, Wei2;|
1Anhui Normal University College of Chemistry and Materials Science Wuhu P. R. China
2University of Oulu Nano and Molecular Systems Research Unit Oulu Finland
3University of Helsinki Department of Physics Helsinki Finland
4College of Chemistry and Materials Science, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Center for Nano Science and Technology, Anhui Normal University, Wuhu, P. R. China
|Online Access:||PDF Full Text (PDF, 0.8 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe201802093305
John Wiley & Sons,
|Publish Date:|| 2018-11-15
A mesoporous MnCo₂O₄ electrode material is made for bifunctional oxygen electrocatalysis. The MnCo₂O₄ exhibits both Co₃O₄-like activity for oxygen evolution reaction (OER) and Mn₂O₃-like performance for oxygen reduction reaction (ORR). The potential difference between the ORR and OER of MnCo₂O₄ is as low as 0.83 V. By XANES and XPS investigation, the notable activity results from the preferred MnIV- and CoII-rich surface. The electrode material can be obtained on large-scale with the precise chemical control of the components at relatively low temperature. The surface state engineering may open a new avenue to optimize the electrocatalysis performance of electrode materials. The prominent bifunctional activity shows that MnCo₂O₄ could be used in metal–air batteries and/or other energy devices.
Angewandte Chemie. International edition in English
|Pages:||14977 - 14981|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
116 Chemical sciences
114 Physical sciences
This work was supported by the National Natural Science Foundation of China (21471006, 21271009), the Recruitment Program for Leading Talent Team of Anhui Province, the Program for Innovative Research Team of Anhui Education Committee, and the Research Foundation for Science and Technology Leaders and Candidates of Anhui Province. W.C. and M.H. acknowledge EU Regional Development Fund and Council of Oulu Region. S.O., T.A., A.-P.H., and S. H. were supported by the Academy of Finland (project 1295696).
This is the peer reviewed version of the following article: W. Wang, L. Kuai, W. Cao, M. Huttula, S. Ollikkala, T. Ahopelto, A.-P. Honkanen, S. Huotari, M. Yu, B. Geng, Angew. Chem. Int. Ed. 2017, 56, 14977., which has been published in final form at https://doi.org/10.1002/anie.201708765 . This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.