Details

Autor(en) / Beteiligte

• Mayorova, Natalia A.
• Modestov, Alexandr D.
• Grinberg, Vitali A.
• Shiryaev, Andrey A.
• Shapovalov, Sergey S.
• Nickolsky, Maximillian S.
• Stolyarov, Igor P.

Titel

Nanoscale catalyst based on a heterometallic carboxylate complex of platinum and iron for hydrogen-air fuel cells

Ist Teil von

• Materials chemistry and physics, 2021-02, Vol.259, p.123968, Article 123968

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2021

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• A nanoscale bimetallic alloy catalyst PtFe/C is prepared by pyrolysis of the heterometallic platinum-iron carboxylate complex [PtFe(OAc)4]2O⋅4CH2Cl2 on Vulcan XC-72 carbon black. It is characterized by X-ray powder diffraction analysis, X-ray fluorescence spectroscopy, transmission electron microscopy, and electrochemical methods. Its activity in the oxygen reduction reaction (ORR) is tested in an aqueous H2SO4 electrolyte in model conditions, using a rotating disc electrode (RDE) technique, and in the membrane electrode assembly of the hydrogen-air single fuel cell. The synthesized catalyst is a tetragonal PtFe intermetallic compound with Pt:Fe = 1:1 atomic ratio. It is uniformly distributed over the carbon support with a predominant metal particle size between 3 and 6 nm. The ORR specific activity of the prepared alloy catalyst is superior to that of a commercial Pt/C E-Tek catalyst and, thus, the PtFe/C catalyst may be a promising cathode material for hydrogen-air fuel cells. [Display omitted] •PtFe alloy on Vulcan XC-72 was obtained using a bimetallic complex of platinum and iron as a precursor.•The catalyst is fct-PtFe intermetallic compound with a Pt:Fe = 1:1 atomic ratio.•The catalyst treatment in H2SO4 resulted in formation of a “core-shell” like structure.•A high activity of the catalyst in the oxygen reduction reaction was demonstrated.•The catalyst is a promising cathode material for hydrogen-air fuel cells.