Special Issue "Electrocatalysts in Hydrogen Storage and Fuel Cells"

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

Deadline for manuscript submissions: 15 February 2020.

Special Issue Editors

Guest Editor
Prof. Dr. Bruno G. Pollet Website E-Mail
Department of Energy and Process Engineering, Faculty of Engineering, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway
Phone: +47 92489316
Interests: electrochemical engineering; electrochemical energy conversion; energy materials and sono-electrochemistry
Guest Editor
Dr. Sivakumar Pasupathi Website E-Mail
HySA Systems Competence Center, SAIAMC, UWC, Robert Sobukwe Road, Bellville 7530, South Africa
Interests: hydrogen economy; fuel cells; electrocatalysts; electrochemistry; system integration; demonstration of hydrogen technologies

Special Issue Information

Dear colleagues,

Many countries in the world are unanimous in the attempt of reducing carbon emissions by 30-40% by 2030 and completely by 2050 whilst increasing energy efficiency. Hydrogen energy is one of the many solutions for reducing greenhouse gases and particulate emissions as long as it is produced from renewable energy, e.g. via the use of cost-effective and efficient electrolysers, such as proton exchange water electrolyser (PEMWE) and alkaline water electrolyser (AWE).

The United States (US) Department of Energy (DoE) projected hydrogen and fuel cell systems’ costs at US$4-5 per kg (projected status based on large-scale deployments of a portfolio of hydrogen production, delivery & dispensing) and US$30 per kWnet (ultimate target) respectively for 2020. The ability of producing catalysts with reduced Platinum Group Metal (PGM) content at lower costs and with higher efficiencies will contribute to meeting those projected criteria.

The anode and cathode catalysts in proton exchange membrane fuel cells (PEMFCs) and PEMWEs all contained precious-metal catalysts (e.g. Ir, Pt, Rh, Ru, Pt-Ru, Pt-Rh, and IrO, etc). The reduction of the PGM catalyst loading of both the anode and cathode electrodes of PEMFC and PEMWE without compromising their performance and durability is a challenge. The lowering of the manufacturing and raw material costs can further help in the successful market deployment of these hydrogen technologies.

Therefore, strategies for reducing the PGM content in the PEMFC and PEMWE electrodes are very important for reducing the overall cost of the systems. Some PGM reduction strategies can include (i) lowering the PGM loading by alloying PGM (either as binary or ternary) with a secondary metal, (ii) replacing PGM by a non-precious electrocatalyst (inorganic or organic), and (iii) maximising the effective surface area of the PGM catalyst by creating unique nanostructures.

Worldwide, many R&D projects both in academia and in industry are tackling the heart of the problem by researching and developing low-cost, highly performing and durable fuel cell and electrolyser electrocatalysts.

This Special Issue will focus on the experimental, theoretical, fundamental and applied investigations into existing and novel electrocatalysts for the oxygen reduction reaction (ORR), the hydrogen oxidation reaction (HOR), the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) in PEMFCs, PEMWEs and AWEs with a particular interest in efficient PGM catalysts, PGM-free and Ti-free catalysts, catalyst utilisation, catalyst durability and stability.

Prof. Dr. Bruno G. Pollet
Dr. Sivakumar Pasupathi
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 papers will be 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 1600 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

  • Electrocatalysts
  • Proton exchange membrane fuel cell (PEMFC)
  • Proton exchange water electrolyser (PEMWE)
  • Alkaline water electrolyser (AWE)
  • Oxygen reduction reaction (ORR)
  • Oxygen evolution reaction (OER)
  • Hydrogen evolution reaction (HER)

Published Papers (1 paper)

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Research

Open AccessArticle
Ex-Situ Electrochemical Characterization of IrO2 Synthesized by a Modified Adams Fusion Method for the Oxygen Evolution Reaction
Catalysts 2019, 9(4), 318; https://doi.org/10.3390/catal9040318 - 01 Apr 2019
Cited by 2
Abstract
The development of highly stable and active electrocatalysts for the oxygen evolution reaction (OER) has attracted significant research interest. IrO2 is known to show good stability during the OER however it is not known to be the most active. Thus, significant research [...] Read more.
The development of highly stable and active electrocatalysts for the oxygen evolution reaction (OER) has attracted significant research interest. IrO2 is known to show good stability during the OER however it is not known to be the most active. Thus, significant research has been dedicated to enhance the activity of IrO2 toward the OER. In this study, IrO2 catalysts were synthesized using a modified Adams fusion method. The Adams fusion method is simple and is shown to directly produce nano-sized metal oxides. The effect of the Ir precursor salt to the NaNO3 ratio and the fusion temperature on the OER activity of the synthesized IrO2 electrocatalysts, was investigated. The OER activity and durability of the IrO2 electrocatalysts were evaluated ex-situ via cyclic voltammetry (CV), chronopotentiometry (CP), electrochemical impedance spectroscopy (EIS) and linear sweep voltammetry (LSV). Physical properties of the IrO2 electrocatalysts were evaluated via X-ray diffraction (XRD), transmission electron microscopy (TEM), thermal gravimetric analysis (TGA), differential thermal analysis (DTA), and energy dispersive spectroscopy (EDS). The results show that the addition of excess NaNO3 during the modified Adams fusion reaction is not a requirement and that higher synthesis temperatures results in IrO2 electrocatalysts with larger particle sizes and reduced electrocatalytic activity. Full article
(This article belongs to the Special Issue Electrocatalysts in Hydrogen Storage and Fuel Cells)
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