Topic Editors

Department of Materials Science, University of Patras, University Campus, GR-26504 Patras, Greece
Prof. Dr. Alexandros Katsaounis
Department of Chemical Engineering, University of Patras, University Campus, GR-26504 Patras, Greece
National Research Council, Institute for Advanced Energy Technologies “Nicola Giordano” (CNR‐ITAE), Via Santa Lucia Sopra Contesse, 5, 98126 Messina, Italy

Nanomaterials for Fuel Cell Systems

Abstract submission deadline
closed (31 October 2023)
Manuscript submission deadline
closed (31 January 2024)
Viewed by
6829

Topic Information

Dear Colleagues,

The energy revolution based on hydrogen technologies offers huge advantages beyond the environmental benefits, such as economic and energy independence, remote and decentralized energy production by creating micro-grids based on renewable energy sources (RES) and green hydrogen from water electrolysis. There is a worldwide mobilization and many countries have already prepared their strategic plans and published hydrogen roadmaps. They have started the energy transition by choosing various hydrogen production technologies, and are moving carefully towards climate neutrality by 2050, where green hydrogen, fuel cells and electrolyzers together with RES will dominate. Pure hydrogen produced from the electrolysis of water (green hydrogen) is the ideal fuel for polymer electrolyte fuel cells, which is a mature technology for batteries in several application areas, and is able to successfully replace internal combustion engines, due to their much higher efficiencies and zero emissions. Currently, gray hydrogen makes up 95% of the H2 produced worldwide, mainly from natural gas, but releases significant amounts of CO2. If this process is integrated with the simultaneous capture and storage/use of the produced CO2 (blue hydrogen technology), then a low carbon energy technology will be available, and this pathway is also considered in many countries’ roadmaps. Methanol is also considered as an attractive hydrogen carrier since it has the advantages of a liquid fuel in storage and transportation, can be produced from biomass and easily converted in a hydrogen rich fuel via a low temperature catalytic process. The research community is leading the technological breakthroughs and innovation in hydrogen technologies. This topic aims to provide an overview on fuel cell technologies, mainly of (but not limited) polymer electrolyte membrane (PEM) fuel cells (low and high temperature), including anode and cathode electrocatalysis, electrodes, electrolytes and membrane electrode assemblies. In addition, nanomaterials for catalytic fuel processing for the production and purification of hydrogen gas streams will also be included.

Another important topic highlighted in this Special Issue will be hydrogen storage; the hydrogen storage issue is critical to the growth of hydrogen fuel cells for both stationary and mobile applications. Three types of techniques can be used for hydrogen storage: compressed, liquid, and stored in a solid material. We will focus our attention on all hydrogen storage techniques.

All the submitted works should report recent trends, insights and advances in the fields of fuel processing and hydrogen utilization in fuel cells.

Dr. George Avgouropoulos
Prof. Dr. Alexandros Katsaounis
Dr. Rolando Pedicini
Topic Editors

Keywords

  • fuel cell
  • catalyst
  • polymer
  • electrolyte
  • membrane electrode assembly
  • oxygen reduction reaction
  • hydrogen evolution
  • electrocatalyst
  • electrode
  • hydrogen production
  • hydrogen purification
  • hydrogen storage

Participating Journals

Journal Name Impact Factor CiteScore Launched Year First Decision (median) APC
Catalysts
catalysts
3.9 6.3 2011 14.3 Days CHF 2700
Energies
energies
3.2 5.5 2008 16.1 Days CHF 2600
Materials
materials
3.4 5.2 2008 13.9 Days CHF 2600
Nanomaterials
nanomaterials
5.3 7.4 2010 13.6 Days CHF 2900
Polymers
polymers
5.0 6.6 2009 13.7 Days CHF 2700

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Published Papers (4 papers)

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12 pages, 2250 KiB  
Article
Precious Metal-Free CoP Nanorod Electrocatalyst as an Effective Bifunctional Oxygen Electrode for Anion Exchange Membrane-Unitized Regenerative Fuel Cells
by Palanisamy Rajkumar, Md. Masud Rana, Beom-Soo Kang, Ho-Jung Sun, Gyungse Park, So-Yeon Kim, Hong-Ki Lee and Joongpyo Shim
Catalysts 2023, 13(6), 941; https://doi.org/10.3390/catal13060941 - 27 May 2023
Cited by 3 | Viewed by 1587
Abstract
In this study, noble metal-free Co(OH)F and CoP nanorod electrocatalysts were prepared and explored as bifunctional oxygen electrodes (BOE) in anion exchange membrane-unitized regenerative fuel cells (AEM-URFCs). A CoP nanorod was synthesized from Co(OH)F via the hydrothermal treatment of cobalt nitrate, ammonium fluoride, [...] Read more.
In this study, noble metal-free Co(OH)F and CoP nanorod electrocatalysts were prepared and explored as bifunctional oxygen electrodes (BOE) in anion exchange membrane-unitized regenerative fuel cells (AEM-URFCs). A CoP nanorod was synthesized from Co(OH)F via the hydrothermal treatment of cobalt nitrate, ammonium fluoride, and urea, followed by phosphorization. The crystal structures, surface morphologies, pore distributions, and elemental statuses of the obtained catalysts were analyzed to identify the changes caused by the incorporation of fluorine and phosphorus. The presence of F and P was confirmed through EDS and XPS analyses, respectively. Using these catalysts, the AEM-based URFCs were operated with hydrogen and oxygen in the fuel cell mode and pure water in the electrolysis mode. In addition, the electrocatalytic activities of the catalysts were evaluated using cyclic voltammetry and electrochemical impedance spectroscopy. In the AEM-URFC test, the CoP catalyst in the BOE delivered the best performance in the fuel cell mode (105 mA cm−2 at 0.3 V), and Co(OH)F was suitable for the water electrolyzer mode (30 mA cm−2 at 2.0 V). CoP and Co(OH)F exhibited higher round trip efficiency (RTE) and power densities than the conventional Co3O4 catalyst. Full article
(This article belongs to the Topic Nanomaterials for Fuel Cell Systems)
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10 pages, 4416 KiB  
Communication
Silver and Samaria-Doped Ceria (Ag-SDC) Cermet Cathode for Low-Temperature Solid Oxide Fuel Cells
by Davin Jeong, Yonghyun Lim, Hyeontaek Kim, Yongchan Park and Soonwook Hong
Nanomaterials 2023, 13(5), 886; https://doi.org/10.3390/nano13050886 - 27 Feb 2023
Viewed by 1491
Abstract
This study demonstrated a silver (Ag) and samarium-doped ceria (SDC) mixed ceramic and metal composite (i.e., cermet) as a cathode for low-temperature solid oxide fuel cells (LT-SOFCs). Introducing the Ag-SDC cermet cathode for LT-SOFCs revealed that the ratio between Ag and SDC, which [...] Read more.
This study demonstrated a silver (Ag) and samarium-doped ceria (SDC) mixed ceramic and metal composite (i.e., cermet) as a cathode for low-temperature solid oxide fuel cells (LT-SOFCs). Introducing the Ag-SDC cermet cathode for LT-SOFCs revealed that the ratio between Ag and SDC, which is a crucial factor for catalytic reactions, can be tuned by the co-sputtering process, resulting in enhanced triple phase boundary (TPB) density in the nanostructure. Ag-SDC cermet not only successfully performed as a cathode to increase the performance of LT-SOFCs by decreasing polarization resistance but also exceeded the catalytic activity of platinum (Pt) due to the improved oxygen reduction reaction (ORR). It was also found that less than half of Ag content was effective to increase TPB density, preventing oxidation of the Ag surface as well. Full article
(This article belongs to the Topic Nanomaterials for Fuel Cell Systems)
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16 pages, 3686 KiB  
Article
Evaluation of Photoelectrocatalysis with Electrode Based on Ti/RuO2-TiO2 Modified with Tin and Tantalum Oxides for the Degradation of Indigo Blue Dye
by Alveriana Tagarro Tomaz, Carla Regina Costa, Maria de Lourdes S. Vasconcellos, Rolando Pedicini and Josimar Ribeiro
Nanomaterials 2022, 12(23), 4301; https://doi.org/10.3390/nano12234301 - 04 Dec 2022
Cited by 4 | Viewed by 1328
Abstract
Indigo Blue (IB) is a dye widely used by the textile sector for dyeing cellulose cotton fibers and jeans, being considered a recalcitrant substance, and therefore resistant to traditional treatments. Several methodologies are reported in the literature for the removal or degradation of [...] Read more.
Indigo Blue (IB) is a dye widely used by the textile sector for dyeing cellulose cotton fibers and jeans, being considered a recalcitrant substance, and therefore resistant to traditional treatments. Several methodologies are reported in the literature for the removal or degradation of dyes from the aqueous medium, among which photoelectrocatalysis stands out, which presents promising results in the degradation of dyes when a dimensionally stable anode (DSA) is used as a photoanode. In the present work, we sought to investigate the efficiency of a Ti/RuO2-TiO2 DSA modified with tin and tantalum for the degradation of Indigo Blue dye by photoelectrocatalysis. For this, electrodes were prepared by the thermal decomposition method and then a physical–chemical and electrochemical analysis of the material was carried out. The composition Ti/RuO2-TiO2-SnO2Ta2O5 (30:40:10:20) was compared to Ti/RuO2-TiO2 (30:70) in the photocatalysis, electrocatalysis, and photoelectrocatalysis tests. The photocatalysis was able to degrade only 63% of the IB at a concentration of 100 mg L−1 in 3 h, whereas the electrocatalysis and photoelectrocatalysis were able to degrade 100% of the IB at the same initial concentration in 65 and 60 min, respectively. Full article
(This article belongs to the Topic Nanomaterials for Fuel Cell Systems)
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19 pages, 4724 KiB  
Article
Preparation and Characterization of QPVA/PDDA Electrospun Nanofiber Anion Exchange Membranes for Alkaline Fuel Cells
by Asep Muhamad Samsudin, Michaela Roschger, Sigrid Wolf and Viktor Hacker
Nanomaterials 2022, 12(22), 3965; https://doi.org/10.3390/nano12223965 - 10 Nov 2022
Cited by 4 | Viewed by 1518
Abstract
In recent years, there has been considerable interest in anion exchange membrane fuel cells (AEMFCs) as part of fuel cell technology. Anion exchange membranes (AEMs) provide a significant contribution to the development of fuel cells, particularly in terms of performance and efficiency. Polymer [...] Read more.
In recent years, there has been considerable interest in anion exchange membrane fuel cells (AEMFCs) as part of fuel cell technology. Anion exchange membranes (AEMs) provide a significant contribution to the development of fuel cells, particularly in terms of performance and efficiency. Polymer composite membranes composed of quaternary ammonium poly(vinyl alcohol) (QPVA) as electrospun nanofiber mats and a combination of QPVA and poly(diallyldimethylammonium chloride) (PDDA) as interfiber voids matrix filler were prepared and characterized. The influence of various QPVA/PDDA mass ratios as matrix fillers on anion exchange membranes and alkaline fuel cells was evaluated. The structural, morphological, mechanical, and thermal properties of AEMs were characterized. To evaluate the AEMs’ performances, several measurements comprise swelling properties, ion exchange capacity (IEC), hydroxide conductivity (σ), alkaline stability, and single-cell test in fuel cells. The eQP-PDD0.5 acquired the highest hydroxide conductivity of 43.67 ms cm−1 at 80 °C. The tensile strength of the membranes rose with the incorporation of the filler matrix, with TS ranging from 23.18 to 24.95 Mpa. The peak power density and current density of 24 mW cm−2 and 131 mA cm−2 were achieved with single cells comprising eQP-PDD0.5 membrane at 57 °C. Full article
(This article belongs to the Topic Nanomaterials for Fuel Cell Systems)
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