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Journals
Catalysts
Special Issues
New Challenges in Electrocatalysts for Fuel Cells and Hydrogen Production
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New Challenges in Electrocatalysts for Fuel Cells and Hydrogen Production

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Electrocatalysis".

Deadline for manuscript submissions: closed (30 September 2021) | Viewed by 6194

Special Issue Editors

Dr. Davide Clematis

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Guest Editor
Department of Civil, Chemical and Environmental Engineering (DICCA), University of Genoa, Genoa, Italy
Interests: electrochemistry; water remediation; electrochemical advanced oxidation processes; electrocatalysts; solid polymer electrolyte; photoelectrochemistry; solid oxide fuel cells; organic degradation
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Fabrice Mauvy

E-Mail Website
Guest Editor
Solid State Chemistry Laboratory of Bordeaux (ICMCB) – CNRS – University of Bordeaux 87, Av. Dr A.Schweitzer, 33608 Pessac, Cedex, France
Interests: solid state electrochemistry; materials for SOFC; HTSE; electrochemical measurements
Dr. Jan Van Herle

E-Mail Website
Guest Editor
Group of Energy Materials, Swiss Federal Institute of Technology in Lausanne (EPFL), 1950 Sion, Switzerland
Interests: fuel cells; electrolyzers; power-to-gas; biogas

Special Issue Information

Dear Colleagues,

We are pleased to invite you to submit your contributions to this Special Issue of Catalysts on “New Challenges in Electrocatalysts for Fuel Cells and Power to X Technologies”.

Fuel cells are a valid alternative to conventional processes for energy production. One of their strengths is the possibility to have systems that can supply current for mobile, as well as stationary applications. Nevertheless, in more than one situation, the power available is more than those required by the system. Several solutions have been proposed to avoid energy waste. One of the most common is the use of batteries, but in recent years, strong attention has been dedicated to power to X applications. These technologies store energy from renewable sources and can also be essential in the production of a carbon-neutral fuel.

A fundamental step to complete this technological transition is the development of active materials that can electrocatalyze reactions. Each device works under unique conditions, requiring tailored electrode material properties. Several different phenomena affect electrode activity and material lifetime, with a substantial impact on cell cost. Moreover, it is fundamental that the scientific community works on both topics and looks for the integration of these systems.

In this context, the development of strong international networks between academic institutions and collaboration with industrial partners, looking for decisive breakthroughs to reach widespread diffusion power technologies is mandatory. This Special Issue aims to collect new results and perspectives about the electrocatalytic activity of materials and device performance, and both experimental and numerical approaches are welcome.

Dr. Davide Clematis
Prof. Fabrice Mauvy
Dr. Jan Van Herle
Guest Editors

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.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Catalysts is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • electrocatalysis
  • fuel cell
  • polymer electrolyte membrane fuel cell
  • solid oxide fuel cell
  • alkaline fuel cell
  • molten carbonate fuel cell
  • non-noble metal catalyst
  • internal biofuel reforming
  • cobalt-free electrodes
  • kinetic modeling
  • power to X
  • hydrogen production
  • ammonia; carbon dioxide
  • fuel production
  • energy storage
  • syngas production
  • carbon-neutral fuel
  • co-electrolysis

Published Papers (2 papers)

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Research

14 pages, 2975 KiB  
Article
Investigation of Filtration Phenomena of Air Pollutants on Cathode Air Filters for PEM Fuel Cells
by Can Özyalcin, Peter Mauermann, Steffen Dirkes, Paul Thiele, Stefan Sterlepper and Stefan Pischinger
Catalysts 2021, 11(11), 1339; https://doi.org/10.3390/catal11111339 - 6 Nov 2021
Cited by 8 | Viewed by 3086
Abstract
Filtration of cathode air is one of the challenges in operating proton-exchange membrane (PEM) fuel cells. The poisoning with air contaminants can lead to rapid performance degradation and initiate an aging process of the fuel cell. Various commercially available cathode filters are being [...] Read more.
Filtration of cathode air is one of the challenges in operating proton-exchange membrane (PEM) fuel cells. The poisoning with air contaminants can lead to rapid performance degradation and initiate an aging process of the fuel cell. Various commercially available cathode filters are being tested in a laboratory gas test bench within the research project X-EMU (03B10502B and 03B10502B2). A literature review of harmful gas contaminants in the air used for the oxygen reduction reaction (ORR) on the cathode side was conducted. Experimental investigations took place at 40 °C with synthetic humid air containing low concentration contaminants such as ammonia, nitrogen dioxide, carbon monoxide, sulfur dioxide, hydrogen sulfide, and toluene. Test durations varied from 3 to 24 h depending on the filtration efficiency. Each gas contaminant showed different reactions with the investigated filters. The filters did not let sulfur-containing components pass. However, carbon monoxide could not be filtrated by any of the tested filters. The filtration of nitrogen oxides was not efficient for all tested filters, while additional filter materials were essential for a successful filtration of ammonia. Comparative results lead to a discussion of possible effects on a fuel cell with an outlook on optimization of the filtration behavior. Full article
(This article belongs to the Special Issue New Challenges in Electrocatalysts for Fuel Cells and Hydrogen Production)
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15 pages, 3121 KiB  
Article
An Examination of the Catalyst Layer Contribution to the Disparity between the Nernst Potential and Open Circuit Potential in Proton Exchange Membrane Fuel Cells
by Peter Mardle, Isotta Cerri, Toshiyuki Suzuki and Ahmad El-kharouf
Catalysts 2021, 11(8), 965; https://doi.org/10.3390/catal11080965 - 12 Aug 2021
Cited by 4 | Viewed by 2312
Abstract
The dependency of the Nernst potential in an operating proton exchange membrane fuel cell (PEMFC) on the temperature, inlet pressure and relative humidity (RH) is examined, highlighting the synergistic dependence of measured open circuit potential (OCP) on all three parameters. An alternative model [...] Read more.
The dependency of the Nernst potential in an operating proton exchange membrane fuel cell (PEMFC) on the temperature, inlet pressure and relative humidity (RH) is examined, highlighting the synergistic dependence of measured open circuit potential (OCP) on all three parameters. An alternative model of the Nernst equation is derived to more appropriately represent the PEMFC system where reactant concentration is instead considered as the activity. Ex situ gas diffusion electrode (GDE) measurements are used to examine the dependency of temperature, electrolyte concentration, catalyst surface area and composition on the measured OCP in the absence of H2 crossover. This is supported by single-cell OCP measurements, wherein RH was also investigated. This contribution provides clarity on the parameters that affect the practically measured OCP as well as highlighting further studies into the effects of catalyst particle surrounding environment on OCP as a promising way of improving PEMFC performance in the low current density regime. Full article
(This article belongs to the Special Issue New Challenges in Electrocatalysts for Fuel Cells and Hydrogen Production)
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