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Green Hydrogen—Perspectives from the Young Investigators’ Point of View

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Green Chemistry".

Deadline for manuscript submissions: closed (30 October 2023) | Viewed by 2527

Special Issue Editors

WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
Interests: electrocatalysis; perovskite oxides; water splitting; water oxidation; oxygen evolution reaction; hydrogen evolution reaction; green hydrogen; oxygen reduction reaction; metal-air batteries; inorganic materials; Ruddlesden-Popper oxides; wastewater treatment; advanced oxidation processes

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Guest Editor
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
Interests: solid oxide fuel cell; solid oxide electrolyzer cell; protonic ceramic fuel cell; protonic ceramic electrolysis cell; hydrogen permeation membrane
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Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
Interests: electrocatalysis; water splitting; hybrid water splitting; in situ characterization; X-ray absorption spectroscopy

Special Issue Information

Dear Colleagues,

Hydrogen is recognized as a clean energy source and a key chemical raw material. Currently, more than 90% of hydrogen is produced from fossil fuels via reforming, which inevitably generates large amounts of CO2 emissions. Therefore, green hydrogen production powered by renewable energy sources (e.g., solar, wind, hydro) is highly desired for realizing a sustainable, carbon-neutral energy future. In addition, the storage and utilization of the green hydrogen produced are also of utmost importance to achieve a circular hydrogen economy and net-zero carbon emissions.

There are multiple ways to realize green hydrogen production. Water electrolysis powered by renewable energy is considered the best, including alkaline water electrolysis, anion exchange membrane water electrolysis, proton exchange membrane water electrolysis, solid oxide electrolysis, and proton conducting ceramic electrolysis. Recent years have witnessed enormous efforts, in particular, from emerging young investigators, in developing insightful understanding, new materials, and/or advanced technologies for increasing the performance, durability, and cost-effectiveness of these water-splitting processes. Endeavors such as desalination of water, power generation and storage through renewable energy, etc., have also been undertaken to contribute to cost reductions in green hydrogen production. There is also considerable interest in exploring materials and technologies for hydrogen storage (e.g., metal hydrides, liquid organic hydrogen carriers) and utilization (e.g., fuel cells, ammonia production, petroleum refining).

This Special Issue aims to collect papers dealing with green hydrogen, spanning its production, storage, and utilization, with a special focus on young investigators’ point of view. All efforts, experimental or theoretical, are encouraged. In addition, a particular focus on new achievements in the field will be appreciated.

Dr. Xiaomin Xu
Dr. Guangming Yang
Dr. Hainan Sun
Guest Editors

Manuscript Submission Information

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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. Molecules is an international peer-reviewed open access semimonthly 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

  • green hydrogen
  • water splitting
  • alkaline water electrolysis
  • anion exchange membrane water electrolysis
  • proton exchange membrane water electrolysis
  • solid oxide electrolysis cell
  • electrocatalysis
  • hydrogen evolution reaction
  • oxygen evolution reaction
  • membrane electrode assembly
  • hydrogen storage
  • hydrogen utilization
  • fuel cells

Published Papers (1 paper)

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Research

16 pages, 5474 KiB  
Article
Solid Oxide Cells with Phase-Inversion Tape-Casted Hydrogen Electrode and SrSc0.175Nb0.025Co0.8O3−δ Oxygen Electrode for High-Performance Reversible Power Generation and Hydrogen Production
by Meiting Yang, Changjiang Yang, Mingzhuang Liang, Guangming Yang, Ran Ran, Wei Zhou and Zongping Shao
Molecules 2022, 27(23), 8396; https://doi.org/10.3390/molecules27238396 - 1 Dec 2022
Cited by 6 | Viewed by 1832
Abstract
Solid oxide cells (SOCs) have been considered as a promising energy conversion and storage device. However, state-of-the-art cells’ practical application with conventionally fabricated Ni-(Y2O3)0.08(ZrO2)0.92 (YSZ) cermet hydrogen electrode and La0.8Sr0.2MnO [...] Read more.
Solid oxide cells (SOCs) have been considered as a promising energy conversion and storage device. However, state-of-the-art cells’ practical application with conventionally fabricated Ni-(Y2O3)0.08(ZrO2)0.92 (YSZ) cermet hydrogen electrode and La0.8Sr0.2MnO3 perovskite oxygen electrode is strongly limited by the unsatisfactory performance. Instead, new advances in cell materials and fabrication techniques that can lead to significant performance enhancements are urgently demanded. Here, we report a high-performance reversible SOC that consisted of a combination of SrSc0.175Nb0.025Co0.8O3−δ (SSNC) and phase-inversion tape-casted Ni-YSZ, which served as the oxygen and hydrogen electrode, respectively. The hydrogen electrode synthesized from phase-inversion tape-casting showed a high porosity of 60.8%, providing sufficient active sites for hydrogen oxidation in the solid oxide fuel cell (SOFC) mode and H2O electrolysis in the solid oxide electrolysis cell (SOEC) mode. Accordingly, it was observed that the maximum power density of 2.3 W cm−2 was attained at 750 °C in SOFC mode and a current density of −1.59 A cm−2 was obtained at 1.3 V in SOEC mode. Hence, these results reveal that the simultaneous optimization of oxygen and hydrogen electrodes is a pragmatic strategy that improves the performance of SOCs, which may significantly accelerate the commercialization of such an attractive technology. Full article
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