Electroreduction of oxygen in alkaline solution on iron phthalocyanine modified carbide-derived carbons

Carbide-derived carbons (CDC) are porous carbon materials with tunable pore structure, very high specific surface area and of great potential for electrochemical applications. In this work CDC-supported transition metal macrocyclic electrocatalysts are prepared using two different type of CDC materi...

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Bibliographic Details
Published in:	Electrochimica acta 2019-03, Vol.299, p.999-1010
Main Authors:	Praats, Reio, Kruusenberg, Ivar, Käärik, Maike, Joost, Urmas, Aruväli, Jaan, Paiste, Päärn, Saar, Rando, Rauwel, Protima, Kook, Mati, Leis, Jaan, Zagal, José H., Tammeveski, Kaido
Format:	Article
Language:	eng
Subjects:	Carbide-derived carbon Carbides Catalysis Catalysts Electrocatalysis Electrocatalysts Electrode materials Fuel cell Fuel cells Iron Iron phthalocyanine Metal phthalocyanines Morphology Noble metals Oxygen reduction Oxygen reduction reactions Photoelectrons Porosity Porous materials Pyrolysis Rotating disks Transition metals X-ray diffraction
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Summary:	Carbide-derived carbons (CDC) are porous carbon materials with tunable pore structure, very high specific surface area and of great potential for electrochemical applications. In this work CDC-supported transition metal macrocyclic electrocatalysts are prepared using two different type of CDC materials and iron phthalocyanine (FePc). Herein, we report the superior electrocatalytic properties of FePc/CDC catalysts fabricated via simple pyrolysis approach. The morphology, composition and structural features of these CDC-based non-noble metal catalysts are evaluated using scanning and transmission electron microscopies, X-ray photoelectron spectroscopy, N2 physisorption and X-ray diffraction analysis. The electrochemical oxygen reduction reaction (ORR) behavior of FePc/CDC catalysts is evaluated employing the rotating disk electrode (RDE) method. FePc modified CDC materials demonstrate a superior ORR electrocatalytic activity in alkaline conditions, showing onset potential of −0.05 V (vs. SCE) close to that of commercial Pt/C. Thus, the RDE results show great potential of these non-Pt catalysts as cathode materials in metal-air batteries and alkaline membrane fuel cells. [Display omitted] •Carbide-derived carbon (CDC) materials are modified with iron phthalocyanine (FePc).•Two CDC materials with different specific surface area and porosity are used as supports.•FePc/CDC catalysts are characterized by SEM, TEM, XPS, XRD and the BET method.•FePc/CDC catalysts show excellent activity towards the ORR in alkaline conditions.•FePc/CDC materials are promising cathode catalysts for alkaline membrane fuel cells.
ISSN:	0013-4686 1873-3859