Mass-Production of Mesoporous MnCo2O4 Spinels with Manganese(IV)- and Cobalt(II)-Rich Surfaces for Superior Bifunctional Oxygen Electrocatalysis

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Wang , W , Kuai , L , Cao , W , Huttula , M , Ollikkala , S , Ahopelto , T , Honkanen , A-P , Huotari , S , Yu , M & Geng , B 2017 , ' Mass-Production of Mesoporous MnCo2O4 Spinels with Manganese(IV)- and Cobalt(II)-Rich Surfaces for Superior Bifunctional Oxygen Electrocatalysis ' , Angewandte Chemie (International Edition) , vol. 56 , no. 47 , pp. 14977-14981 . https://doi.org/10.1002/anie.201708765

Title: Mass-Production of Mesoporous MnCo2O4 Spinels with Manganese(IV)- and Cobalt(II)-Rich Surfaces for Superior Bifunctional Oxygen Electrocatalysis
Author: Wang, Wenhai; Kuai, Long; Cao, Wei; Huttula, Marko; Ollikkala, Sami; Ahopelto, Taru; Honkanen, Ari-Pekka; Huotari, Simo; Yu, Mengkang; Geng, Baoyou
Contributor organization: Department of Physics
Helsinki In Vivo Animal Imaging Platform (HAIP)
Date: 2017
Language: eng
Number of pages: 5
Belongs to series: Angewandte Chemie (International Edition)
ISSN: 1521-3773
DOI: https://doi.org/10.1002/anie.201708765
URI: http://hdl.handle.net/10138/298093
Abstract: 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 MnIVand 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.
Subject: cobalt
electrocatalysis
electrode materials
manganese
mesoporous materials
114 Physical sciences
Peer reviewed: Yes
Usage restriction: openAccess
Self-archived version: acceptedVersion


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