Porous Transport Layers for Proton Exchange Membrane Electrolysis Under Extreme Conditions of Current Density, Temperature, and Pressure (Adv. Energy Mater. 33/2021)

Stiber, Svenja; Balzer, Harald; Wierhake, Astrid; Wirkert, Florian J.; Roth, Jeffrey; Rost, Ulrich; Brodmann, Michael; Lee, Jason K.; Bazylak, Aimy; Waiblinger, Wendelin; Gago, Aldo; Friedrich, K. Andreas

doi:10.1002/aenm.202170131

Cited by 15 publications

(21 citation statements)

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“…Four further test systems were used to investigate N115‐based CCMs. The obtained results are plotted in Figure 5, whereas the values are in the same range as previously recorded using similar materials but at different temperature levels [12], emphasizing the reliability of large‐scale operation.…”

Section: Resultssupporting

confidence: 69%

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A novel advanced test system for polymer electrolyte membrane water electrolysis based on hydraulic cell compression

et al. 2022

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In this work, a novel polymer electrolyte membrane water electrolyzer (PEMWE) test cell based on hydraulic single‐cell compression is described. In this test cell, the current density distribution is almost homogeneous over the active cell area due to hydraulic cell clamping. As the hydraulic medium entirely surrounds the active cell components, it is also used to control cell temperature resulting in even temperature distribution. The PEMWE single‐cell test system based on hydraulic compression offers a 25 cm2 active surface area (5.0 × 5.0 cm) and can be operated up to 80°C and 6.0 A/cm2. Construction details and material selection for the designed test cell are given in this document. Furthermore, findings related to pressure distribution analyzed by utilizing a pressure‐sensitive foil, the cell performance indicated by polarization curves, and the reproducibility of results are described. Experimental data indicate the applicability of the presented testing device for relevant PEMWE component testing and material analysis.

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Section: Resultssupporting

confidence: 69%

“…In situ tests have been performed using a titanium PTL expanded metal sheet sinter filter compound manufactured by GKN Sinter Metals that was recently reported elsewhere [12]. Furthermore, graphitic GDL type Spectracarb 2050A‐6060 by Giner ELX and Nafion‐based CCMs have been applied as active cell components.…”

Section: Methodsmentioning

confidence: 99%

A novel advanced test system for polymer electrolyte membrane water electrolysis based on hydraulic cell compression

et al. 2022

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“…As PTL, Ti porous sintered layer (PSL) on Ti mesh compound produced by diffusion bonding coated with Pt was used (PSL/mesh‐PTL). [ 40 ] Ti plates were used as BPP. Water electrolysis testing was conducted in a 4 cm 2 single cell with polarization curves and durability test recorded at 80 °C and ambient pressure.…”

Section: Resultsmentioning

confidence: 99%

High Performance and Durable Anode with 10‐Fold Reduction of Iridium Loading for Proton Exchange Membrane Water Electrolysis

Torrero

Morawietz

Sánchez

et al. 2023

Advanced Energy Materials

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Proton exchange membrane water electrolysis (PEMWE) technology is especially advantageous for green H 2 production as a clean energy vector. During the water electrolysis process, the oxygen evolution reaction (OER) requires a large amount of iridium (2-3 mg Ir cm −2 ) as catalyst. This material is scarce and expensive, representing a major bottleneck for large-scale deployment of electrolyzers. This work develops an anode with 10-fold reduction of Ir loading (0.2 mg Ir cm −2 ) compared to what it is used in commercial PEMWE for more than 1000 h. An advanced catalyst based on an Ir mixed oxide (Sr 2 CaIrO 6 ) is used for this purpose. Transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and X-ray absorption spectroscopy (XAS) analyses show that the unconventional structure of the reconstructed catalyst can contribute to the reduction of Ir in the catalyst layer. The reconfiguration of the ionomer in the catalyst layer is also observed by scanning electron microscopy (SEM) and atomic force microscopy (AFM), results in almost the full coverage of the catalytic layer with ionomer. The results presented herein demonstrate that it is possible to achieve high performance and stability in PEMWE with low Ir loading in the anode without showing significant degradation.

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“…Moreover, while most studies are conducted at room temperature, the operation temperature of PEMWEs is usually 60–80 °C. [ 105 ] The agglomeration of nanostructured active species would play a more significant role in the deactivation of OER electrocatalysts at higher temperatures, and the dissolution kinetics of Ir species would probably be enhanced. Therefore, the durability of OER electrocatalysts at high temperatures should be taken into account.…”

Section: Discussionmentioning

confidence: 99%

On the Durability of Iridium‐Based Electrocatalysts toward the Oxygen Evolution Reaction under Acid Environment

She

Zhao

et al. 2021

Adv Funct Materials

122

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Proton exchange membrane water electrolyzers (PEMWEs) driven by renewable electricity provide a facile path toward green hydrogen production, which is critical for establishing a sustainable hydrogen society. The high working potential and the corrosive environment pose severe challenges for developing highly active and durable electrocatalysts for the oxygen evolution reaction (OER). To date, iridium (Ir)‐based materials, largely metallic Ir and Ir‐based oxides, are the most suitable OER electrocatalysts for PEMWEs due to their balanced activity and durability. Tremendous efforts have been devoted to improving the specific activity of Ir species to reduce the cost; however, advances in enhancing the durability of Ir‐based electrocatalysts are rather limited. In this review, the recent research progress on tackling the stability issues of Ir‐based OER electrocatalysts in acid media is summarized, aiming to provide inspiration for designing highly active and stable Ir‐based electrocatalysts. The OER mechanism and the associated failure modes of active Ir species are summarized. Then, mechanistic studies on the dissolution behavior of Ir species and experimental attempts on enhancing the durability of Ir‐based electrocatalysts are discussed. The personal perspectives for future studies on Ir‐based OER electrocatalysts are also provided.

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Porous Transport Layers for Proton Exchange Membrane Electrolysis Under Extreme Conditions of Current Density, Temperature, and Pressure (Adv. Energy Mater. 33/2021)

Cited by 15 publications

References 0 publications

A novel advanced test system for polymer electrolyte membrane water electrolysis based on hydraulic cell compression

A novel advanced test system for polymer electrolyte membrane water electrolysis based on hydraulic cell compression

High Performance and Durable Anode with 10‐Fold Reduction of Iridium Loading for Proton Exchange Membrane Water Electrolysis

On the Durability of Iridium‐Based Electrocatalysts toward the Oxygen Evolution Reaction under Acid Environment

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