The Effect of Fe, Co, and Ni Structural Promotion of Cryptomelane (KMn8O16) on the Catalytic Activity in Oxygen Evolution Reaction

Transition metal (Fe, Co, Ni)-doped cryptomelane materials (K-OMS-2) were synthesized and characterized with the use of XRD, Raman spectroscopy, XPS, N 2 -BET, H 2 -TPR, and SEM. The electrocatalytic reactivity in oxygen evolution was evaluated with the use of the rotating disk electrode. It was fou...

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Bibliographic Details
Published inElectrocatalysis Vol. 9; no. 6; pp. 762 - 769
Main Authors Stelmachowski, Paweł, Monteverde Videla, Alessandro H. A., Jakubek, Tomasz, Kotarba, Andrzej, Specchia, Stefania
Format Journal Article
LanguageEnglish
Published New York Springer US 01.11.2018
Springer Nature B.V
Subjects
Catalysis
Catalytic activity
Chemical synthesis
Chemistry
Chemistry and Materials Science
Cobalt
Electrochemistry
Energy Systems
Iron
Nickel
Original Research
Oxygen evolution reactions
Physical Chemistry
Raman spectroscopy
Rotating disks
Transition metals
X ray photoelectron spectroscopy
Electrocatalysis
K-OMS-2
OER
Manganese oxide
Catalyst
Cryptomelane
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Summary:Transition metal (Fe, Co, Ni)-doped cryptomelane materials (K-OMS-2) were synthesized and characterized with the use of XRD, Raman spectroscopy, XPS, N 2 -BET, H 2 -TPR, and SEM. The electrocatalytic reactivity in oxygen evolution was evaluated with the use of the rotating disk electrode. It was found that the electrocatalytic activity is substantially enhanced for the cobalt-doped material, while iron and nickel doping have no, or even, negative effect on K-OMS-2. The structure of the material bulk is preserved in all cases, but the formation of additional birnessite phases can be evidenced for the iron and cobalt dopants. It is discussed that the reactivity enhancement of Co/K-OMS-2 can be related not only to the formation of cobalt-doped heterophases (cobaltane, birnessite) but also to the changes of the properties of pristine cryptomelane. Graphical Abstract Transition metal (Fe, Co, Ni) doped cryptomelane materials (K-OMS-2) were investigated, and the oxygen evolution reactivity enhancement was observed for the Co/K-OMS-2 material. The increased reactivity can be related to the formation of cobalt doped heterophases (cobaltane, birnessite), but also to the changes of the properties of pristine cryptomelane
ISSN:1868-2529
1868-5994
DOI:10.1007/s12678-018-0488-9