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High Activity Oxygen Evolution Electrocatalysts

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A5: Hydrogen Energy".

Deadline for manuscript submissions: closed (10 January 2022) | Viewed by 9114

Special Issue Editor


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Guest Editor
Department of Chemistry and Biochemistry, Texas State University, 601 University Dr San Marcos, TX 78666, USA
Interests: hydrogen energy systems; unitized regenerative fuel cells; water electrolysis; fuel cells; design of nanomaterials; electrocatalysis.

Special Issue Information

Dear Colleagues,

The sustained growth in the production of renewable electricity and the intermittency that is associated with some of these processes make the development of new technologies necessary to solve this problem. One of the major challenges is the development of cost-effective and reliable conversion and storage systems that allow meeting society needs at a large scale. The use of hydrogen as an energy carrier has become a paramount economical and societal asset. The current Special Issue of Energies aims to collect articles that contribute to providing perspectives about the progress, accomplishments, and current technology status of the different strategies used to address current challenges in catalyst development and system designs that help accelerate the introduction of PEMWE as a viable alternative to the current fossil fuel technology and infrastructure. Topics of interest include, but are not limited to:

  • Polymer electrolyte membrane water electrolysis (PEMWE)
  • Ion exchange membranes
  • Advanced electrocatalysts
  • Standardization and evaluation protocols
  • PEMWE stack
  • PEMWE hardware design
  • Prototypes

Prof. Dr. Fernando Godinez
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

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Keywords

  • electrolysis
  • state-of-the-art materials
  • PEMWE technology
  • modeling
  • electrocatalyst design
  • testing protocols
  • component design

Published Papers (2 papers)

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Research

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11 pages, 2658 KiB  
Article
Electrocatalytic Activity of Reduced Graphene Oxide Supported Cobalt Cinnamate for Oxygen Evolution Reaction
by Myung Jun Lee, Junyeop Kim, Jaeun Kang, Hyewon Shin, Junghwan Do and Seong Jung Kwon
Energies 2021, 14(16), 5020; https://doi.org/10.3390/en14165020 - 16 Aug 2021
Cited by 2 | Viewed by 2104
Abstract
The stability of porous coordination polymers during an electrochemical reaction could be improved by introducing supporter materials. An I3O0-type inorganic hybrid electrocatalyst, cobalt cinnamate, supported on reduced graphene oxide (rGO) was successfully prepared for an oxygen evolution reaction. The [...] Read more.
The stability of porous coordination polymers during an electrochemical reaction could be improved by introducing supporter materials. An I3O0-type inorganic hybrid electrocatalyst, cobalt cinnamate, supported on reduced graphene oxide (rGO) was successfully prepared for an oxygen evolution reaction. The electrocatalytic activity and stability of cobalt cinnamate(catalyst)/rGO composite were significantly improved due to the strong interaction between catalyst and supporter, which led to enhanced anchoring stability and electrical conductivity. The catalyst/rGO composite shows ~30 mV reduction in overpotential and improvement in durability from ≥35% to ≥70% after a reaction time of 12 h, compared to the catalyst alone. Full article
(This article belongs to the Special Issue High Activity Oxygen Evolution Electrocatalysts)
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Review

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32 pages, 14313 KiB  
Review
Catalytic Hydrogen Combustion for Domestic and Safety Applications: A Critical Review of Catalyst Materials and Technologies
by Alina E. Kozhukhova, Stephanus P. du Preez and Dmitri G. Bessarabov
Energies 2021, 14(16), 4897; https://doi.org/10.3390/en14164897 - 11 Aug 2021
Cited by 29 | Viewed by 6416
Abstract
Spatial heating and cooking account for a significant fraction of global domestic energy consumption. It is therefore likely that hydrogen combustion will form part of a hydrogen-based energy economy. Catalytic hydrogen combustion (CHC) is considered a promising technology for this purpose. CHC is [...] Read more.
Spatial heating and cooking account for a significant fraction of global domestic energy consumption. It is therefore likely that hydrogen combustion will form part of a hydrogen-based energy economy. Catalytic hydrogen combustion (CHC) is considered a promising technology for this purpose. CHC is an exothermic reaction, with water as the only by-product. Compared to direct flame-based hydrogen combustion, CHC is relatively safe as it foregoes COx, CH4, and under certain conditions NOx formation. More so, the risk of blow-off (flame extinguished due to the high fuel flow speed required for H2 combustion) is adverted. CHC is, however, perplexed by the occurrence of hotspots, which are defined as areas where the localized surface temperature is higher than the average surface temperature over the catalyst surface. Hotspots may result in hydrogen’s autoignition and accelerated catalyst degradation. In this review, catalyst materials along with the hydrogen technologies investigated for CHC applications were discussed. We showed that although significant research has been dedicated to CHC, relatively limited commercial applications have been identified up to date. We further showed the effect of catalyst support selection on the performance and durability of CHC catalysts, as well as a holistic summary of existing catalysts used for various CHC applications and catalytic burners. Lastly, the relevance of CHC applications for safety purposes was demonstrated. Full article
(This article belongs to the Special Issue High Activity Oxygen Evolution Electrocatalysts)
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