Water management implications for ALD-modified polymer electrolyte membrane fuel cell catalysts

McNeary, W. Wilson; Linico, Audrey E.; Weimer, Alan W.

doi:10.1007/s11051-020-04921-8

Cited by 6 publications

(7 citation statements)

References 27 publications

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“…123 Another study explores that atomic layer deposition could modify carbon carriers that increase hydrophobicity and avoid waterlogging, promoting mass transport. 124 Similarly, it is observed that functionalized carbon supports with a covalently grafted carrier on benzene sulfonic acid avoids sulfonic acid poisoning and reduces O 2 transport resistance, promoting proton conduction on the carbon surface (Fig. 6i).…”

Section: Carbon Support Modificationmentioning

confidence: 80%

Optimized mass transfer in a Pt-based cathode catalyst layer for PEM fuel cells

Wang,

Teng,

Zaman

et al. 2024

Green Chem.

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Section: Carbon Support Modificationmentioning

confidence: 80%

Optimized mass transfer in a Pt-based cathode catalyst layer for PEM fuel cells

Wang,

Teng,

Zaman

et al. 2024

Green Chem.

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“…Furthermore, an anode catalyst layer was prepared by directly depositing Pt nanoparticles with uniform size on gas diffusion layer, which exhibited excellent activity and stability compared with the anode prepared using commercial carbon supported Pt catalysts and a conventional screen printing method [218,219]. Although ALD was a powerful technique to prepared highly dispersed Pt catalysts on supports as presented above, Weimer et al found that the residual functional groups after Pt ALD could decrease the hydrophobicity of catalyst layer, which resulted in the poor MEA performance by inducing water flooding [220,221]. They modified Pt/C catalysts by sub-monolayer WN films and subsequently thermal treatment that improved the catalyst performance in the mass transport region.…”

Section: Mea Modification By Aldmentioning

confidence: 99%

Atomic-scale engineering of advanced catalytic and energy materials via atomic layer deposition for eco-friendly vehicles

Liu¹,

Su²,

Chen³

2023

Int. J. Extrem. Manuf.

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Zero-emission eco-friendly vehicles with partly or fully electric powertrains have exhibited rapidly increased demand for reducing the emissions of air pollutants and improving the energy efficiency. Advanced catalytic and energy materials are essential as the significant portions in the key technologies of eco-friendly vehicles, such as the exhaust emission control system, power lithium ion battery and hydrogen fuel cell. Precise synthesis and surface modification of the functional materials and electrodes are required to satisfy the efficient surface and interface catalysis, as well as rapid electron/ion transport. Atomic layer deposition (ALD), an atomic and close to-atomic scale manufacturing method, shows unique characteristics of precise thickness control, uniformity and conformality for film deposition, which has emerged as an important technique to design and engineer advanced catalytic and energy materials. This review has summarized recent process of ALD on the controllable preparation and modification of metal and oxide catalysts, as well as lithium ion battery and fuel cell electrodes. The enhanced catalytic and electrochemical performances are discussed with the unique nanostructures prepared by ALD. Recent works on ALD reactors for mass production are highlighted. The challenges involved in the research and development of ALD on the future practical applications are presented, including precursor and deposition process investigation, practical device performance evaluation, large-scale and efficient production, etc.

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“…However, lowering the temperature in most cases is associated with an ohmic drop through electrode and electrolyte overpotentials that lower the ionic conductivity critical for SOFC performance. Therefore, YSZ, the most commonly used SOFC electrolyte, is either replaced with a more stable electrolyte, or a thin layer technology is employed such as ALD, ,− electrophoretic deposition, etc. to reduce the electrolyte thickness and deposit interlayer between the electrode and the electrolyte for reducing interfacial resistance.…”

Section: Applications and Prospects Of Rare Earth Oxidesmentioning

confidence: 99%

“…While earlier studies were more focused on characterizing the thin films, recent studies are more focused on chemical or thermal parameters. In this regard, McNeary et al have shown that fuel cell performance can be significantly modified by controlling water management in the catalyst layers …”

Section: Applications and Prospects Of Rare Earth Oxidesmentioning

confidence: 99%

“…In this regard, McNeary et al have shown that fuel cell performance can be significantly modified by controlling water management in the catalyst layers. 90 The widespread application of REOs with complex metals in SOFCs can be attributed to their chemical stability and compositional flexibility under extreme operating conditions. YSZ film, a commonly used material in SOFC, can be produced by the electrophoretic deposition technique that decreases the electrolyte resistivity, which is critical for the development of SOFC.…”

Section: Applications and Prospects Of Rare Earth Oxidesmentioning

confidence: 99%

See 1 more Smart Citation

Current Applications and Future Potential of Rare Earth Oxides in Sustainable Nuclear, Radiation, and Energy Devices: A Review

Hossain

Raihan

Akbar

et al. 2022

ACS Appl. Electron. Mater.

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To date, rare earth oxides (REOs) have proven to be key components in generating sustainable energy solutions, ensuring environmental safety and economic progress due to their diverse attributes. REOs' exceptional optical, thermodynamic, and chemical properties have made them indispensable in a variety of sophisticated technologies, including electric vehicle magnets, portable energy devices, fuel cell catalysts, radiation shielding, dosimetry, and many others. Therefore, the successful incorporation of rare earth elements (REEs) into host materials in controlled concentrations offers competitive advantages to fabricate portable energy devices, radiation sensors, and radiation shielding glasses, as well as to improve the performance of existing photovoltaic cells, which is of great interest to both researchers and industry. As the global demand for REEs grows rapidly, it is critical to comprehend the underlying physics as well as the wider consequences of REEs on sustainable energy and nuclear technologies, both in the near and long term. However, despite their relevance, a focused review on the applications, prospects, and challenges of REOs in photovoltaics, nuclear, and energy devices is still unavailable. To this effort, this review succinctly reports recent experimental studies on eight REOs (R 2 O 3 , R = Yb, Er, Sm, Eu, Y, Gd, Dy, and Ce) and their specific applications and industrial aspects. While several subdomains are reported, the applications of REOs in next-generation solar cells and photovoltaic devices for promoting zero-emission clean energy and rechargeable batteries for electric vehicles (EVs) are the most pioneering ones. Furthermore, REOs' chemical stability and compositional versatility allow them to be used in a variety of high-efficiency energy converters, including solid oxide fuel cells (SOFCs). From the perspective of thermodynamic and structural stability, the gamma and neutron absorptivity of REO-doped (such as Dy 3+ , Eu 3+ , Sm 3+ , Nd 3+ , etc.) glasses shows improved shielding performance in radiation domains. Aside from the applications, the prospects of REOs presented in this article are likely to encourage current and future scholars to pursue a wide range of important studies in the fields of energy and nuclear systems. This review also reports the key challenges (i.e., material degradation, phase transformation, magnetic entropy shift, etc.) associated with REOs in a standalone section. These challenges demand the immediate attention of scientists and engineers for efficient, costeffective, and environmentally sustainable solutions. At the end, future advancement pathways for REO applications are also suggested.

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Water management implications for ALD-modified polymer electrolyte membrane fuel cell catalysts

Cited by 6 publications

References 27 publications

Optimized mass transfer in a Pt-based cathode catalyst layer for PEM fuel cells

Optimized mass transfer in a Pt-based cathode catalyst layer for PEM fuel cells

Atomic-scale engineering of advanced catalytic and energy materials via atomic layer deposition for eco-friendly vehicles

Current Applications and Future Potential of Rare Earth Oxides in Sustainable Nuclear, Radiation, and Energy Devices: A Review

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