Pore-scale study of pore-ionomer interfacial reactive transport processes in proton exchange membrane fuel cell catalyst layer

Chen, Li; Zhang, Ruiyuan; Kang, Qinjun; Tao, Wen‐Quan

doi:10.1016/j.cej.2019.123590

Cited by 80 publications

(44 citation statements)

References 54 publications

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“…Fuel cells (FCs) are electrochemical devices used for the efficient energy conversion of chemical energy in fuels, directly into electricity. Their high efficiency has reached a theoretical potential of 83% in the case of proton exchange membrane fuel cells 8,9 and reached over 100% in the case of urea FCs. [10][11][12] FCs are considered an effective method for the conversion of different renewable such as hydrogen, methanol, ethanol, and urea.…”

Section: Introductionmentioning

confidence: 99%

Co‐decorated reduced graphene/titanium nitride composite as an active oxygen reduction reaction catalyst with superior stability

Al‐Dhaifallah¹,

Abdelkareem

Rezk

et al. 2020

Int J Energy Res

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Summary Preparing a cost‐effective, active, stable, non‐precious catalyst, especially at the cathode, is one of the basic requirements for the commercialization of fuel cells (FCs). In this study, cobalt nanoparticles composite with titanium nitride (TiN) were prepared on the surface of reduced graphene oxide, using a facile hydrothermal method, followed by heat treatment under an inert atmosphere. The surface morphology, surface composition, and crystalline structure are investigated with the use of field emission‐scanning electron microscopy, X‐ray photoelectron spectroscopy, and X‐ray diffraction, respectively. The oxygen reduction reaction (ORR) activity is examined in sulfuric acid (0.5 M H2SO4), under nitrogen and oxygen bubbling. Results showed that there is an optimum ratio of the Co and the TiN that maximizes the ORR activity. A high onset potential of 0.926 V vs Ag/AgCl is obtained in the case of CoTiN (30)/Gr. This is much higher than that of commercial Pt/C catalyst (0.576 V vs Ag/AgCl). The prepared catalyst has no activity towards methanol oxidation, unlike the Pt/C catalyst. Thus, it considered a promising cathode catalyst for direct alcoholic FCs. Furthermore, the composite catalyst has a high stability, with no activity degradation occurring even after 1000 cycles. This is extremely effective compared to the 20% loss of Pt/C activity under the same operating conditions. The high performance of the prepared catalyst is related to the synergetic effect between the TiN and the Cobalt.

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Section: Introductionmentioning

confidence: 99%

Co‐decorated reduced graphene/titanium nitride composite as an active oxygen reduction reaction catalyst with superior stability

Al‐Dhaifallah¹,

Abdelkareem

Rezk

et al. 2020

Int J Energy Res

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“…Since protons only are transported in the ionomer, the content and distribution of the ionomer significantly affect the proton conduction. 26,28 In this algorithm, the ionomer is randomly generated and adsorbed around carbon and Pt. This algorithm works as follows:…”

Section: Model Developmentmentioning

confidence: 99%

Interlink among catalyst loading, transport and performance of proton exchange membrane fuel cells: a pore-scale study

Hou

et al. 2022

Nanoscale Horiz.

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“…When I/C ratio exceeds appropriate range, excess ionomers can lead to a significant increase in mass resistance. [35] The mass resistance mainly includes local resistance and bulk resistance. Suzuki et al [36] developed a model of oxygen transport and considered that oxygen dissolution resistance on the interface of gas/ionomer is a significant part of local resistance, while the increase of thickness of ionomer film could attribute little to local resistance.…”

Section: Ionomer Contentmentioning

confidence: 99%

Component Optimization for Catalyst Layers in Proton Exchange Membrane Fuel Cells

Peng¹,

Zhang²,

Zhang³

et al. 2020

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Proton exchange membrane fuel cells (PEMFCs) have been recognized as a promising energy conversion solution. The biggest challenges for the commercialization of PEMFCs are cost and durability. Although many efforts have been made on catalysts, the performance and durability of the membrane electrode assemblies (MEAs) still cannot fully meet the targets established by the U.S. Department of Energy. Optimizing the catalyst layer to maximize the utilization of catalysts is a quite practical issue. In this paper, we reviewed the most recent advances on the component optimization for catalyst layers, including support materials, ionomers, and solvents. Based on the reaction mechanism on the three-phase boundary, enhancing the intrinsic properties of each component and optimizing their interactions can attribute a lot to the performance and durability of PEMFCs.

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Pore-scale study of pore-ionomer interfacial reactive transport processes in proton exchange membrane fuel cell catalyst layer

Cited by 80 publications

References 54 publications

Co‐decorated reduced graphene/titanium nitride composite as an active oxygen reduction reaction catalyst with superior stability

Co‐decorated reduced graphene/titanium nitride composite as an active oxygen reduction reaction catalyst with superior stability

Interlink among catalyst loading, transport and performance of proton exchange membrane fuel cells: a pore-scale study

Component Optimization for Catalyst Layers in Proton Exchange Membrane Fuel Cells

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