Benchmarking Fuel Cell Electrocatalysts Using Gas Diffusion Electrodes: Inter-lab Comparison and Best Practices

Ehelebe, Konrad; Schmitt, Nicolai; Sievers, Gustav; Jensen, Annie Aarup; Hrnjić, Armin; Jiménez, Pablo Collantes; Kaiser, Pascal; Geuß, Moritz; Ku, Yu-Ping; Jovanovič, Primož; Mayrhofer, Karl Johann Jakob; Etzold, Bastian J. M.; Hodnik, Nejc; Escudero-Escribano, Marı́a; Arenz, Matthias; Cherevko, Serhiy

doi:10.1021/acsenergylett.1c02659

Cited by 86 publications

(109 citation statements)

References 50 publications

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“… 43 , 44 This method has been proposed as a suitable tool to bridge the gap between the fundamental electrochemical catalyst evaluation using rotating disk electrode half-cell methods and the applied fuel cell research in single cells. 45 − 48 Here, for additional validation of the catalysts’ performance, similarly to the previous chapter, a comparison with a commercial state-of-the-art PtCo/CB benchmark from Umicore (Elyst Pt30 0690) marked as “Umicore” in Figure 4 was also used. A very low Pt loading of only 0.1 mg Pt cm –2 was used for all measurements, which is in accordance with Department of Energy (DoE) 2025 targets.…”

Section: Resultsmentioning

confidence: 99%

Graphene-Derived Carbon Support Boosts Proton Exchange Membrane Fuel Cell Catalyst Stability

et al. 2022

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The lack of efficient and durable proton exchange membrane fuel cell electrocatalysts for the oxygen reduction reaction is still restraining the present hydrogen technology. Graphene-based carbon materials have emerged as a potential solution to replace the existing carbon black (CB) supports; however, their potential was never fully exploited as a commercial solution because of their more demanding properties. Here, a unique and industrially scalable synthesis of platinum-based electrocatalysts on graphene derivative (GD) supports is presented. With an innovative approach, highly homogeneous as well as high metal loaded platinum-alloy (up to 60 wt %) intermetallic catalysts on GDs are achieved. Accelerated degradation tests show enhanced durability when compared to the CB-supported analogues including the commercial benchmark. Additionally, in combination with X-ray photoelectron spectroscopy Auger characterization and Raman spectroscopy, a clear connection between the sp 2 content and structural defects in carbon materials with the catalyst durability is observed. Advanced gas diffusion electrode results show that the GD-supported catalysts exhibit excellent mass activities and possess the properties necessary to reach high currents if utilized correctly. We show record-high peak power densities in comparison to the prior best literature on platinum-based GD-supported materials which is promising information for future application.

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Section: Resultsmentioning

confidence: 99%

Graphene-Derived Carbon Support Boosts Proton Exchange Membrane Fuel Cell Catalyst Stability

et al. 2022

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“…Very recently, half-cell designs consisting of the electrode in a gas diffusion layer (porous transport layer) configuration were developed and introduced for exploring the electrocatalysts performance in a more realistic way. [132][133][134][135][136][137][138] This method is still not ideal since the presence of liquid in a water electrolyzer does not truly mimic the situation of an AEM-WE fed with water, but the advantage of achieving higher current density can be recognized. The halfcell method was introduced mainly for other reactions, its utilization for HER and OER is strongly encouraged and supported.…”

Section: Route For Efficient Electrocatalystsmentioning

confidence: 99%

“…However, in the majority of the cases, this does not translate into effective and efficient electrocatalytic activity once the electrocatalyst is integrated into the MEA and tested in a full cell electrolyzer. Very recently, half‐cell designs consisting of the electrode in a gas diffusion layer (porous transport layer) configuration were developed and introduced for exploring the electrocatalysts performance in a more realistic way [132–138] . This method is still not ideal since the presence of liquid in a water electrolyzer does not truly mimic the situation of an AEM‐WE fed with water, but the advantage of achieving higher current density can be recognized.…”

Section: Pgm‐free Electrocatalystsmentioning

confidence: 99%

What is Next in Anion‐Exchange Membrane Water Electrolyzers? Bottlenecks, Benefits, and Future

et al. 2022

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As highlighted by the recent roadmaps from the European Union and the United States, water electrolysis is the most valuable high‐intensity technology for producing green hydrogen. Currently, two commercial low‐temperature water electrolyzer technologies exist: alkaline water electrolyzer (A‐WE) and proton‐exchange membrane water electrolyzer (PEM‐WE). However, both have major drawbacks. A‐WE shows low productivity and efficiency, while PEM‐WE uses a significant amount of critical raw materials. Lately, the use of anion‐exchange membrane water electrolyzers (AEM‐WE) has been proposed to overcome the limitations of the current commercial systems. AEM‐WE could become the cornerstone to achieve an intense, safe, and resilient green hydrogen production to fulfill the hydrogen targets to achieve the 2050 decarbonization goals. Here, the status of AEM‐WE development is discussed, with a focus on the most critical aspects for research and highlighting the potential routes for overcoming the remaining issues. The Review closes with the future perspective on the AEM‐WE research indicating the targets to be achieved.

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“…RHE 70. At these potentials, the effect of H 3 PO 4 poisoning, combined with the increased mass-transport limitations, may significantly change the dominating effect of H 3 PO 4 .…”

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confidence: 99%

Modelling Anion Poisoning during Oxygen Reduction on Pt Near-Surface Alloys

Petersen

Jensen

Wan

et al. 2022

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Electrolyte effects play an important role on the activity of the oxygen reduction reaction (ORR) of Pt-based electrodes. Herein, we combine a computational model and rotating disk electrode measurements to investigate the effects from phosphate anion poisoning for the ORR on well-defined extended Pt surfaces. We construct a model including the poisoning effect from phosphate species on Pt(111) and Cu/Pt(111) based on density functional theory simulations. We have investigated the effect of adsorbed phosphate species at low overpotentials when tuning *OH binding energies. Our work shows that, regardless of the surface site blockage from phosphate, the trend in catalytic oxygen reduction activity is predominately governed by the *OH binding.

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Benchmarking Fuel Cell Electrocatalysts Using Gas Diffusion Electrodes: Inter-lab Comparison and Best Practices

Cited by 86 publications

References 50 publications

Graphene-Derived Carbon Support Boosts Proton Exchange Membrane Fuel Cell Catalyst Stability

Graphene-Derived Carbon Support Boosts Proton Exchange Membrane Fuel Cell Catalyst Stability

What is Next in Anion‐Exchange Membrane Water Electrolyzers? Bottlenecks, Benefits, and Future

Modelling Anion Poisoning during Oxygen Reduction on Pt Near-Surface Alloys

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