Effect of Catalyst Layer Hydrophobicity on Fe−N−C Proton Exchange Membrane Fuel Cells

Zhang, Xinyue; Liu, Qingtao; Shui, Jianglan

doi:10.1002/celc.202000351

Cited by 14 publications

(11 citation statements)

References 54 publications

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“…Increasing the size of the PSI from 2 to 4 mm increased the power density by 26.12% in modified serpentine flow field. The effect of the hydrophobicity of Fe-N-C CCL on the performance of the PEMFC was investigated and the authors concluded that the hydrophobicity of the Fe-N-C CLL has a great influence on the power density of the fuel cell, but the influence on the long-term durability of the fuel cell is negligible [ 381 ].…”

Section: Pemfc Water Managementmentioning

confidence: 99%

Proton Exchange Membrane Fuel Cells (PEMFCs): Advances and Challenges

Tellez-Cruz¹,

et al. 2021

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The study of the electrochemical catalyst conversion of renewable electricity and carbon oxides into chemical fuels attracts a great deal of attention by different researchers. The main role of this process is in mitigating the worldwide energy crisis through a closed technological carbon cycle, where chemical fuels, such as hydrogen, are stored and reconverted to electricity via electrochemical reaction processes in fuel cells. The scientific community focuses its efforts on the development of high-performance polymeric membranes together with nanomaterials with high catalytic activity and stability in order to reduce the platinum group metal applied as a cathode to build stacks of proton exchange membrane fuel cells (PEMFCs) to work at low and moderate temperatures. The design of new conductive membranes and nanoparticles (NPs) whose morphology directly affects their catalytic properties is of utmost importance. Nanoparticle morphologies, like cubes, octahedrons, icosahedrons, bipyramids, plates, and polyhedrons, among others, are widely studied for catalysis applications. The recent progress around the high catalytic activity has focused on the stabilizing agents and their potential impact on nanomaterial synthesis to induce changes in the morphology of NPs.

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Section: Pemfc Water Managementmentioning

confidence: 99%

Proton Exchange Membrane Fuel Cells (PEMFCs): Advances and Challenges

Tellez-Cruz¹,

et al. 2021

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“…With the optimized amount of PTFE added via the decal method, the P max of PEMFCs was significantly improved, and MEA with DM‐5% yielded the highest value (951 mW cm −2 ); it needs to mention that initial current decay was also mitigated. [ 139 ]…”

Section: Advances In Membrane Electrode Assembly (Mea)mentioning

confidence: 99%

Advanced Atomically Dispersed Metal–Nitrogen–Carbon Catalysts Toward Cathodic Oxygen Reduction in PEM Fuel Cells

Deng

Luo

Chi

et al. 2021

Advanced Energy Materials

128

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Proton exchange membrane fuel cells (PEMFCs) are a highly efficient hydrogen energy conversion technology, which shows great potential in mitigating carbon emissions and the energy crisis. Currently, to accelerate the kinetics of the oxygen reduction reaction (ORR) required for PEMFCs, extensive utilization of expensive and rare platinum‐based catalysts are required at the cathodic side, impeding their large‐scale commercialization. In response to this issue, atomically dispersed metal–nitrogen–carbon (M–N–C) catalysts with cost‐effectiveness, encouraging activity, and unique advantages (e.g., homogeneous activity sites, high atom efficiency, and intrinsic activity) have been widely investigated. Considerable progress in this domain has been witnessed in the past decade. Herein, a comprehensive summary of recent development in atomically dispersed M–N–C catalysts for the ORR under acidic conditions and of their application in the membrane electrode assembly (MEA) of PEM fuel cells, are presented. The ORR mechanisms, composition, and operating principles of PEMFCs are introduced. Thereafter, atomically dispersed M–N–C catalysts towards improved acidic ORR and MEA performance is summarized in detail, and improvement strategies for MEA performance and stability are systematically analyzed. Finally, remaining challenges and significant research directions for design and development of high‐performance atomically dispersed M–N–C catalysts and MEA are discussed.

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“…[45] This effect can be utilized not only by adding hydrophobic additives such as PTFE, [14,18,[46][47][48][49] but also for example by adding graphitized carbon nanofibers [50] to the catalyst ink. This strategy has been investigated and applied to PEMFCs (with Pt [46,47] as well as FeÀ N/C [49] as catalyst), AEMFCs [48] and Pt-based BPIFCs. [14,18]…”

Section: Catalyst Layersmentioning

confidence: 99%

“…In general, a hydrophobic catalyst layer could improve the water removal, as it has a higher contact angle and will therefore force the water out of the catalyst layer. [45] This effect can be utilized not only by adding hydrophobic additives such as PTFE, [14,18,[46][47][48][49] but also for example by adding graphitized carbon nanofibers [50] to the catalyst ink. This strategy has been investigated and applied to PEMFCs (with Pt [46,47] as well as FeÀ N/C [49] as catalyst), AEMFCs [48] and Pt-based BPIFCs.…”

Section: Catalyst Layersmentioning

confidence: 99%

Bipolar‐Interface Hydrogen Fuel Cells: A Review and Perspective on Future High‐Performance, Low Platinum‐Group Metal Content Designs

2021

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This Review elucidates the state-of-the-art, challenges, and future prospects for bipolar-interface-based fuel cells (BPIFCs), focusing on hydrogen-based systems. On the one side, it provides a summary of state-of-the-art design strategies for BPIFCs from different fields of application. On the other hand, it identifies the two most pivotal areas for a future understanding that particularly refer to the changed mass transport situations introduced by the bipolar fuel cell design, that is, the water management and the bipolar interface layer itself. All operation-relevant components such as the gas diffusion layers, catalyst layers, and membrane designs are discussed within the framework of these two main areas. As non-platinum-group metal (PGM) oxygen reduction is one of the key benefits of bipolar hydrogen fuel cells, a particular focus is put on this configuration. Several additional challenges that exclusively originate from non-PGM-based catalyst layers and possible mitigation approaches are discussed. One key insight is that these thick layers could take over the role of microporous layers in the future. Finally, we emphasize that there is a strong lack in both theoretical and experimental approaches that improve our understanding of the underlying processes in bipolar fuel cell designs.

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Effect of Catalyst Layer Hydrophobicity on Fe−N−C Proton Exchange Membrane Fuel Cells

Cited by 14 publications

References 54 publications

Proton Exchange Membrane Fuel Cells (PEMFCs): Advances and Challenges

Proton Exchange Membrane Fuel Cells (PEMFCs): Advances and Challenges

Advanced Atomically Dispersed Metal–Nitrogen–Carbon Catalysts Toward Cathodic Oxygen Reduction in PEM Fuel Cells

Bipolar‐Interface Hydrogen Fuel Cells: A Review and Perspective on Future High‐Performance, Low Platinum‐Group Metal Content Designs

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