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Hydrogen
Special Issues
Hydrogen Energy and Fuel Cell Technology
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Hydrogen Energy and Fuel Cell Technology

A special issue of Hydrogen (ISSN 2673-4141).

Deadline for manuscript submissions: 20 November 2026 | Viewed by 2323

Editors

Prof. Dr. Xuefang Li

E-Mail Website
Guest Editor
Institute of Thermal Science and Technology, Shandong University, Jinan 250061, China
Interests: hydrogen safety; hydrogen storage; heat transfer
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Chenhui Liu

E-Mail Website
Guest Editor
College of Civil Engineering, Hunan University, Changsha 410082, China
Interests: hydrogen transportation; hydrogen safety; life cycle analysis

Special Issue Information

Dear Colleagues,

Hydrogen energy facilitates the global transition toward a decarbonized and sustainable future. Serving as a versatile energy carrier, hydrogen enables long-duration storage and supports decarbonization in hard-to-abate sectors, including heavy industry, long-haul transport, and seasonal energy storage. Fuel cell technologies advance this transition by converting hydrogen into electricity with high efficiency and zero local emissions, providing a foundation for clean mobility and distributed power. This Special Issue invites original research across the entire hydrogen value chain. Key topics include green hydrogen production (e.g., water electrolysis, solar-driven processes), advanced storage and transportation, and safety infrastructure. We also encourage submissions on fuel cell materials, stack design, and real-world performance, alongside system integration, techno-economic analysis, and life-cycle assessments. By consolidating innovations from production to end-use, this collection seeks to accelerate the deployment of reliable, affordable, and scalable hydrogen solutions.

Prof. Dr. Xuefang Li
Prof. Dr. Chenhui Liu
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 250 words) can be sent to the Editorial Office for assessment.

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-anonymized peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Hydrogen is an international peer-reviewed open access quarterly 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 1200 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

  • hydrogen production
  • hydrogen storage
  • fuel cells
  • hydrogen safety
  • renewable energy integration
  • green hydrogen
  • electrolysis
  • hydrogen infrastructure
  • hard-to-abate sectors

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (3 papers)

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Research

16 pages, 3518 KB  
Article
Design and Evaluation of High-Safety Differential Pressure Power Generation Technologies for Hydrogen and Ammonia Gas
by Guohui Song, Xiang Wang, Haiming Gu, Sheng Wang, Jingxin Xu, Cai Liang, Hao Zhao and Lirong Wang
Hydrogen 2026, 7(2), 65; https://doi.org/10.3390/hydrogen7020065 - 8 May 2026
Viewed by 450
Abstract
The use of differential pressure energy for green hydrogen and ammonia comes with significant safety challenges. Two zero-emission technical schemes—one based on magnetic coupling transmission and another based on dual magnetic fluid seals—were proposed and designed. The energy performance of both schemes was [...] Read more.
The use of differential pressure energy for green hydrogen and ammonia comes with significant safety challenges. Two zero-emission technical schemes—one based on magnetic coupling transmission and another based on dual magnetic fluid seals—were proposed and designed. The energy performance of both schemes was first analyzed for a DN200 pipe using the DWSIM software (Version 8.6.6). Subsequently, the levelized cost of electricity and the dynamic payback period were evaluated and compared. The results show that the magnetic coupling transmission scheme exhibits relatively low energy efficiency (54.9–61.7%), whereas the scheme based on dual magnetic fluid seals is more complex yet achieves higher energy efficiency (65.8–67.1%). The levelized electricity cost of both schemes under a differential pressure of 0.5 MPa is estimated to be lower than the feed-in tariff of coal-fired power plants in China, and the dynamic payback period is estimated to be less than 5.5 years. Overall, both schemes provide benefits in energy savings and profitability. These schemes warrant further experimental investigation and pilot testing. Full article
(This article belongs to the Special Issue Hydrogen Energy and Fuel Cell Technology)
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14 pages, 4909 KB  
Article
An Integrated Approach to Controlling the Al/H2O Reaction in Hydrogen Generation
by Olga Morozova and Olga Kudryashova
Hydrogen 2026, 7(2), 63; https://doi.org/10.3390/hydrogen7020063 - 6 May 2026
Viewed by 429
Abstract
The reaction of aluminum with water is a promising method for producing hydrogen on demand for autonomous energy systems. However, its practical implementation faces the challenge of process control due to high exothermicity, leading to particle sintering and thermal instability, especially when using [...] Read more.
The reaction of aluminum with water is a promising method for producing hydrogen on demand for autonomous energy systems. However, its practical implementation faces the challenge of process control due to high exothermicity, leading to particle sintering and thermal instability, especially when using highly reactive nanopowders. The goal of this study is to implement an integrated approach to controlling this reaction, aimed at minimizing these risks. The approach is based on the principle of spatial and temporal distribution of reactants to ensure uniform heat release. Two process management methods were investigated: electrostatic application of aluminum powder to the reactor walls with its gradual release and pre-treatment of a nanopowder-ice mixture. Using a macrokinetic mathematical model, calculations of the conversion kinetics and heat release were performed and compared with experimental data. The results showed that both methods prevent slurry self-heating and achieve uniform hydrogen generation at a constant rate. In particular, the use of a pre-frozen mixture ensured stable hydrogen production over a long period of time without additional heating or stirring. The proposed approaches can be used in the design of safe and efficient hydrogen generators for autonomous power plants. Full article
(This article belongs to the Special Issue Hydrogen Energy and Fuel Cell Technology)
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Graphical abstract

25 pages, 5377 KB  
Article
Optimal Efficiency Control of Photovoltaic–Energy Storage–Hydrogen Production System Considering Proton Exchange Membrane Electrolyzer Efficiency
by Chao Fu, Zeyu Chen, Hanqing Liu, Long Ma and Yuwei Sun
Hydrogen 2026, 7(2), 54; https://doi.org/10.3390/hydrogen7020054 - 22 Apr 2026
Viewed by 997
Abstract
Hydrogen is a clean energy carrier with broad application potential. This study focuses on improving hydrogen production efficiency in a proton exchange membrane (PEM) electrolyzer system that integrates a photovoltaic (PV) array, a battery energy storage system, and the electrolyzer. The PV array [...] Read more.
Hydrogen is a clean energy carrier with broad application potential. This study focuses on improving hydrogen production efficiency in a proton exchange membrane (PEM) electrolyzer system that integrates a photovoltaic (PV) array, a battery energy storage system, and the electrolyzer. The PV array is interfaced with the electrolyzer through a buck converter using a maximum power point tracking (MPPT) algorithm to ensure maximum energy harvesting. A key contribution of this work is the integration of a battery system through a dual-active-bridge (DAB) converter. The DAB converter employs a multilayer perceptron (MLP) model to dynamically regulate the electrolyzer current and maintain optimal operating efficiency. An adaptive energy management strategy is further proposed to address solar irradiance fluctuations and enhance long-term operational stability. The MLP model is developed in Python and embedded into a PLECS simulation environment. The simulation results verify the effectiveness of the proposed control approach and efficiency optimization scheme. Throughout the simulation period, the PEM electrolyzer sustains an optimal efficiency of 69.9% under maximum PV power output. A limitation of this study is that the efficiency model is derived from the literature and does not yet consider all operational factors, indicating the need for refinement in future work. Full article
(This article belongs to the Special Issue Hydrogen Energy and Fuel Cell Technology)
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