Capabilities and limitations of rotating disk electrodes versus membrane electrode assemblies in the investigation of electrocatalysts

Proton exchange membrane water electrolyzers (PEMWEs) are an attractive technology for renewable energy conversion and storage. By using green electricity generated from renewable sources like wind or solar, high-purity hydrogen gas can be produced in PEMWE systems, which can be used in fuel cells and other industrial sectors. To date, significant advances have been achieved in improving the efficiency of PEMWEs through the design of stack components; however, challenges remain for their large-scale and long-term application due to high cost and durability issues in acidic conditions. In this review, we examine the latest developments in engineering PEMWE systems and assess the gap that still needs to be filled for their practical applications. We provide a comprehensive summary of the reaction mechanisms, the correlation among structure-composition-performance, manufacturing methods, system design strategies, and operation protocols of advanced PEMWEs. We also highlight the discrepancies between the critical parameters required for practical PEMWEs and those reported in the literature. Finally, we propose the potential solution to bridge the gap and enable the appreciable applications of PEMWEs. This review may provide valuable insights for research communities and industry practitioners working in these fields and facilitate the development of more cost-effective and durable PEMWE systems for a sustainable energy future. 

Recent advances in proton exchange membrane water electrolysis.

Proton exchange membrane water electrolysis (PEMWE) is one of the central technologies to enable the widespread usage of the intermittent renewable energy, thereby solving problems caused by the global warming...

Recent developments of Iridium-based catalysts for oxygen evolution reaction in acidic water electrolysis

ADVERTISEMENT RETURN TO ISSUEPREVViewpointNEXTiR Compensation for Electrocatalysis Studies: Considerations and RecommendationsWeiran Zheng*Weiran ZhengDepartment of Chemistry, Guangdong Technion - Israel Institute of Technology, Shantou 515063, ChinaGuangdong Provincial Key Laboratory of Materials and Technologies for Energy Conversion, Guangdong Technion - Israel Institute of Technology, Shantou 515063, ChinaTechnion - Israel Institute of Technology, Haifa 32000, Israel*[email protected]More by Weiran Zhenghttps://orcid.org/0000-0002-9915-6982Cite this: ACS Energy Lett. 2023, 8, 4, 1952–1958Publication Date (Web):March 28, 2023Publication History Received16 February 2023Accepted21 March 2023Published online28 March 2023Published inissue 14 April 2023https://doi.org/10.1021/acsenergylett.3c00366Copyright © 2023 American Chemical SocietyRIGHTS & PERMISSIONSArticle Views5851Altmetric-Citations-LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (3 MB) Get e-AlertsSupporting Info (1)»Supporting Information Supporting Information SUBJECTS:Catalysts,Electrocatalysis,Electrodes,Electrolyte solutions,Layers Get e-Alerts 

https://pubs.acs.org/doi/pdf/10.1021/acsenergylett.3c00366

iR Compensation for Electrocatalysis Studies: Considerations and Recommendations

Metal-free electrocatalysts represent a main branch of active materials for oxygen evolution reaction (OER), but they excessively rely on functionalized conjugated carbon materials, which substantially restricts the screening of potential efficient carbonaceous electrocatalysts. Herein, we demonstrate that a mesostructured polyacrylate hydrogel can afford an unexpected and exceptional OER activity - on par with that of benchmark IrO2 catalyst in alkaline electrolyte, together with a high durability and good adaptability in various pH environments. Combined theoretical and electrokinetic studies reveal that the positively charged carbon atoms within the carboxylate units are intrinsically active toward OER, and spectroscopic operando characterizations also identify the fingerprint superoxide intermediate generated on the polymeric hydrogel backbone. This work expands the scope of metal-free materials for OER by providing a new class of polymeric hydrogel electrocatalysts with huge extension potentials. 

/pdf/a-polymeric-hydrogel-electrocatalyst-for-direct-water-3oeilbo9.pdf

A polymeric hydrogel electrocatalyst for direct water oxidation

Effect of the IrOx Conductivity on the Anode Electrode/Porous Transport Layer Interfacial Resistance in PEM Water Electrolyzers

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Effect of the IrOx Conductivity on the Anode Electrode/Porous Transport Layer Interfacial Resistance in PEM Water Electrolyzers