Influence of IrO2/TiO2 coated titanium porous transport layer on the performance of PEM water electrolysis

Doan, Tuan Linh; Lee, Han Eol; Kim, Min-Joong; Cho, Won Chul; Cho, Hyun‐Seok; Kim, Taekeun

doi:10.1016/j.jpowsour.2022.231370

Cited by 33 publications

(18 citation statements)

References 39 publications

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“…This observation possibly hints at mass-transport limitations hindering the performance of the ECH under these current densities. 32 Surprisingly, the IrO 2 loading appears to also have a direct effect on the MBE : MBA ratio, with lower loading leading to higher FE MBA increasing from 2% to 8% and 10% at 80 mA cm −2 .…”

Section: Resultsmentioning

confidence: 93%

Both sides matter: anode configurations alter the activity of electrolyzers for organic hydrogenations

et al. 2023

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Section: Resultsmentioning

confidence: 93%

Both sides matter: anode configurations alter the activity of electrolyzers for organic hydrogenations

et al. 2023

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“…This performance is comparable to the most recent reports of PEMWE with low Ir loaded anodes. [25,[42][43][44] For further comparison, PEMWE commercial electrolyzers, such as those from Hydrogenics, [16] Siemens, [45] and Proton Onsite [46] achieve about 2.2 V at 2 Acm −2 . In addition to demonstrate a good initial performance, the novel catalyst must prove to be stable over extended operating time under PEMWE conditions.…”

Section: Electrochemical Performance and Durability For Sr 2 Cairo 6 ...mentioning

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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“…Owing to the corrosive environment at the anode, the PTL typically consists of titanium at the anode. However, the protective passive layer covered on the Ti surface (oxide/hydroxide) leads to high surface contact resistance originating from its lack of electrical conductivity [75,76]. This results in loss of energy, which is exacerbated during the intensive operation at large current densities [77,78].…”

Section: Electrode Modificationmentioning

confidence: 99%

“…Besides, the passivation can also be suppressed by depositing a suitable catalyst that also improves the electrochemical performance. For instance, Doan et al applied spray coating and thermal treatment, and a thin layer of IrO 2 /TiO 2 catalyst was formed on the surface of Ti PTL to prevent surface passivation [76]. Simultaneously, the performance of PEMWE was enhanced as the cell ohmic resistance was reduced due to the prevention of TiO 2 formation.…”

Section: Electrode Modificationmentioning

confidence: 99%

A brief introduction of electrode fabrication for proton exchange membrane water electrolyzers

Lin

Seow

2023

J. Phys. Energy

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Proton exchange membrane water electrolyzer (PEMWE) is a major enabler of green hydrogen production. The development of water electrolyzers is a vital step in driving the progress of a hydrogen-based economy. The system inside the electrolyzer is a zero-gap cell featuring low ohmic resistance and boosted mass transport, leading to higher energy efficiency and minimized capital cost. Besides, utilizing PEM in the electrolyzer for sustainable hydrogen production enables the system to perform with many advantages, including superior energy efficiency, higher hydrogen purity, and high flexibility. Therefore, as PEM electrolyzers continue to evolve, sustainable hydrogen production on a larger scale will be realized in the near future. This review summarizes the status quo of PEM water electrolyzers in the past four years. We will start with a brief introduction of the core of a water electrolyzer, namely the membrane electrode assembly (MEA), which will be followed by an introduction of fabrication methods of MEA, including catalyst-coated membrane (CCM) methods, catalyst-coated electrode (CCE) methods, and other innovative fabrication methods. Next, we will summarize recent attempts to modify electrodes and membranes in MEAs to promote the performance of PEMWE. Subsequently, catalyst development for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in MEA is discussed, highlighting novel HER/OER catalysts and strategies to reduce the content of noble metals. Lastly, conclusion and perspectives are provided to present a blueprint to inspire the future development of PEMWE.

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Influence of IrO2/TiO2 coated titanium porous transport layer on the performance of PEM water electrolysis

Cited by 33 publications

References 39 publications

Both sides matter: anode configurations alter the activity of electrolyzers for organic hydrogenations

Both sides matter: anode configurations alter the activity of electrolyzers for organic hydrogenations

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

A brief introduction of electrode fabrication for proton exchange membrane water electrolyzers

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