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Open AccessArticle

PAC Synthesis and Comparison of Catalysts for Direct Ethanol Fuel Cells

1
Technological Department of Platov South-Russian State Polytechnic University (NPI), 346428 Novocherkassk, Russia
2
Department of Physics, Southern Federal University, 344090 Rostov-on-Don, Russia
3
Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432 Chernogolovka, Russia
*
Author to whom correspondence should be addressed.
Processes 2020, 8(6), 712; https://doi.org/10.3390/pr8060712
Received: 19 May 2020 / Revised: 11 June 2020 / Accepted: 17 June 2020 / Published: 20 June 2020
(This article belongs to the Special Issue Synthesis and Application of Nano- and Microdispersed Systems)
Pt/C, PtMOn/C (M = Ni, Sn, Ti, and PtX/C (X = Rh, Ir) catalyst systems were prepared by using the pulse alternating current (PAC) technique. Physical and electrochemical parameters of samples were carried out by x-ray powder diffraction (XRD), transmission electron microscopy (TEM), and CO stripping. The catalytic activity of the synthesized samples for the ethanol electrooxidation reaction (EOR) was investigated. The XRD patterns of the samples showed the presence of diffraction peaks characteristic for Pt, NiO, SnO2, TiO2, Rh, and Ir. The TEM images indicate that the Pt, Rh, and PtIr (alloys) particles had a uniform distribution over the carbon surface in the Pt/C, PtRh/C, PtIr/C, and PtMOn/C (M = Ni, Sn, Ti) catalysts. The electrochemically active surface area of catalysts was determined by the CO-stripping method. The addition of a second element to Pt or the use of hybrid supported catalysts can evidently improve the EOR activity. A remarkable positive affecting shift of the onset potential for the EOR was observed as follows: PtSnO2/C > PtTiO2/C ≈ PtIr/C ≈ PtNiO/C > PtRh/C ≈ Pt/C. The addition of SnO2 to Pt/C catalyst led to the decrease of the onset potential and to significantly facilitate the EOR. The long-term cyclic stability of the synthesized catalysts was investigated. Thereby, the PtSnO2/C catalyst prepared by the PAC technique can be considered as a promising anode catalyst for direct ethanol fuel cells. View Full-Text
Keywords: direct ethanol fuel cell; platinum-based catalyst; electrocatalysis; pulse alternating current direct ethanol fuel cell; platinum-based catalyst; electrocatalysis; pulse alternating current
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Kuriganova, A.; Chernysheva, D.; Faddeev, N.; Leontyev, I.; Smirnova, N.; Dobrovolskii, Y. PAC Synthesis and Comparison of Catalysts for Direct Ethanol Fuel Cells. Processes 2020, 8, 712.

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