Electrooxidation reactions of methanol and ethanol on Pt–MoO3 for dual fuel cell applications. (15th August 2022)

• Record Type: Journal Article
• Authors: Sandoval-González, A.; Navarro, J.A. Alanís; Rivera Martínez, M.A.; Paraguay-Delgado, F.; Gamboa, S.A.
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 70(2022)
• Page Start: 30262
• Page End: 30276
• Publication Date: 2022-08-15
• Subjects: Microwave -- Pt–MoO3 -- Methanol -- Ethanol -- Fuel cells -- CO adsorption; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.05.054
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Pt–MoO3 was synthesized by microwave-assisted chemical reduction. The physicochemical characterization showed that the electrocatalyst contained nanoparticles of Pt and clusters of MoO3 . The average particle size of the catalytic material was 2.5 nm. The electrochemical results showed that the Pt–MoO3 /C was suitable to carry out the electrooxidation reactions of ethanol and methanol indistinctly, avoiding CO poisoning. It was possible to compare the results with commercial Pt/C. The synthesized material showed a better electrochemical performance. Different simulations were performed using the Nernst equation to evaluate the influence of temperature, internal resistance, and the current density losses as a function of the fuel used. The theoretical results indicated that the electrical power of the mono-cell improves by 21.5% when the energy vector is changed from methanol to ethanol at the maximum power point, obtaining an electrical potential change ΔE = 87.02 mV and a variation of the electric power of Δp = 114.14 mW cm −2 . The use of dual fuels could improve the performance of experimental fuel cells. Graphical abstract: Image 1 Highlights: Nanostructured Pt–MoO3 was synthesized by microwave-assisted chemical reduction. Pt–MoO3 /C can electrooxidize methanol and ethanol in dual fuel cells. Pt–MoO3 /C was tolerant to CO poisoning. Electrooxidation reaction of methanol is more complex than ethanol. Simulation showed better performance when fuels were used sequentially.