Model Study of CNT-Based PEMFCs’ Electrocatalytic Layers

Mensharapov, Ruslan M.; Ivanova, Nataliya A.; Zasypkina, Adelina A.; Spasov, Dmitry D.; Sinyakov, Matvey V.; Grigoriev, S.A.; Фатеев, В. Н.

doi:10.3390/catal12101227

Cited by 7 publications

(5 citation statements)

References 36 publications

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“…The formation of large agglomerates was observed. The increase in the size of the platinum particles was associated with the high mass fraction of platinum in the electrocatalyst [30]. This effect was observed regardless of the electrocatalyst synthesis method.…”

Section: Resultsmentioning

confidence: 92%

Electrode with a Carbon Nanotube Array for a Proton Exchange Membrane Fuel Cell

et al. 2023

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One of the most important problems in the development of proton exchange membrane fuel cells remains the selection of an efficient electrocatalyst support capable of providing a low loading of active metal with minimal changes in the electrochemical surface, electronic conductivity, and activity. In this work, carbon nanotube arrays (CNTAs) grown directly on commercial gas diffusion layers (GDLs) are used to form electrodes of a new type. The CNTAs are used in the electrode as a microporous layer. The catalytic layer is formed in the microporous layer by a method that does not destroy the carbon support structure and consists of the controlled impregnation of CNTAs with the Pt-precursor with subsequent reduction in platinum particles in the surface volume of the layer. The resulting electrode was studied by scanning/transmission electron microscopy and Raman spectroscopy. This electrode provides increased electrical conductivity of the layer and can also improve stability and longer service life due to the enhanced adhesion of carbon materials to the GDL.

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Section: Resultsmentioning

confidence: 92%

Electrode with a Carbon Nanotube Array for a Proton Exchange Membrane Fuel Cell

et al. 2023

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“…The use of CNTs instead of carbon black provides a high utilization rate of Pt in MEA [83] compared to the Pt/C catalyst. The higher use of platinum characterizes the higher number of Pt active sites and three-phase boundaries in the applied catalysts [79], and hence their high catalytic activity [87].…”

Section: Carbon Nanotubesmentioning

confidence: 99%

Recent Advances in the Development of Nanocarbon-Based Electrocatalytic/Electrode Materials for Proton Exchange Membrane Fuel Cells: A Review

Zasypkina,

Ivanova,

Spasov

et al. 2024

Catalysts

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The global issue for proton exchange membrane fuel cell market development is a reduction in the device cost through an increase in efficiency of the oxygen reduction reaction occurring at the cathode and an extension of the service life of the electrochemical device. Losses in the fuel cell performance are due to various degradation mechanisms in the catalytic layers taking place under conditions of high electric potential, temperature, and humidity. This review is devoted to recent advances in the field of increasing the efficiency and durability of electrocatalysts and other electrode materials by introducing structured carbon components into their composition. The main synthesis methods, physicochemical and electrochemical properties of materials, and performance of devices on their basis are presented. The main correlations between the composition and properties of structured carbon electrode materials, which can provide successful solutions to the highlighted issues, are revealed.

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“…Therefore, Pt electrocatalysts based on nanostructured carbon materials with high stability (graphene, carbon nanotubes, carbon nanofibers, fullerenes, etc.) are promising components for the PEMFCs with extended lifetimes [6][7][8][9][10][11]. The type of support also has an impact on metal-support interactions as well as on the energy of the current-forming reaction [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Adsorption and Recombination of H+ and H3O+ on Graphene-Supported Pt1, Pt13, and Pt14 Nanoclusters: A First Principles Study

Smirnov,

Mensharapov,

Spasov

et al. 2024

Catalysts

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Platinum electrocatalysts on graphene-like supports have recently attracted research interest as components of electrochemical devices based on hydrogen oxidation reactions in acid media due to their improved electrochemical properties, high stability, and conductivity. Within the current work, hydrogen adsorption and the recombination effects of a proton and hydroxonium on a graphene-based electrocatalyst were investigated using density functional theory. The interaction between ions and the platinum surface was simulated for various configurations, including different initial ion distances and angles relative to the surface of the graphene sheet as well as different adsorptions on various Pt atoms (vertices or faces for Pt13 and Pt14 nanoclusters). Then, the geometry optimization was performed. Changes in the density of states during the reactions were studied to analyze the occurrences and alterations of the interactions. A comparative analysis of the obtained adsorption energies of H+ and H3O+ with experimental data was conducted. The energy was calculated to be less in absolute value, and intermediates were more stable in adsorption models with the H–Pt–Gr angle of 90° than in models with the angle of 180°. Strong chemical bonding for models with H–Pt distances less than 2 Å was observed from the DOS.

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Model Study of CNT-Based PEMFCs’ Electrocatalytic Layers

Cited by 7 publications

References 36 publications

Electrode with a Carbon Nanotube Array for a Proton Exchange Membrane Fuel Cell

Electrode with a Carbon Nanotube Array for a Proton Exchange Membrane Fuel Cell

Recent Advances in the Development of Nanocarbon-Based Electrocatalytic/Electrode Materials for Proton Exchange Membrane Fuel Cells: A Review

Adsorption and Recombination of H+ and H3O+ on Graphene-Supported Pt1, Pt13, and Pt14 Nanoclusters: A First Principles Study

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