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Advances in Green Hydrogen Energy Production

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A5: Hydrogen Energy".

Deadline for manuscript submissions: 20 August 2026 | Viewed by 2534

Special Issue Editor

School of Safety Science and Engineering (School of Emergency Management), Nanjing University of Science and Technology, Nanjing, China
Interests: safety of hydrogen energy; hydrogen energy production
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues, 

Green hydrogen energy production represents a transformative step towards a more sustainable and environmentally friendly future regarding energy use. The significance of green hydrogen lies in its potential to decarbonize various industries, from transportation to power generation. Unlike fossil fuel-derived hydrogen, green hydrogen offers a clean and renewable alternative. It can be stored and transported efficiently, enabling its use as a backup energy source or as a fuel for hydrogen-powered vehicles.

The production of green hydrogen also contributes to the growth of renewable energy infrastructure. As more renewable energy sources are deployed to generate electricity for electrolysis, the overall dependency on fossil fuels decreases. This transition not only reduces carbon emissions but also promotes energy security and resilience.

This Special Issue aims to present and disseminate the most recent advances related to the theory, design, modeling, application, policy, and security aspects of green hydrogen energy production. Topics of interest for publication include the following:

  • Electrolysis technologies;
  • Renewable energy integration;
  • Development of novel electrode materials and catalysts;
  • Engineering challenges in reactor design, process optimization, and system integration;
  • Safe and efficient storage and transportation;
  • Environmental impact and sustainability;
  • Policies and economics;
  • Industrial applications;
  • Security in green hydrogen energy production.

Dr. Bin Li
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 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-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies 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 2600 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 energy
  • electrolysis technologies
  • renewable energy integration
  • system integration
  • storage and transportation
  • environmental impact
  • industrial applications
  • security

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Published Papers (4 papers)

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Research

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37 pages, 4383 KB  
Article
Financial Drivers of Green Hydrogen Deployment: A Comparison Between Australia, Germany, and Brazil
by Roberto Ivo Da Rocha Lima Filho, Thereza Cristina Aquino, Lino Guimarães Marujo, Vinicius Botelho, Kalyne Brito and Pedro Senna
Energies 2026, 19(10), 2488; https://doi.org/10.3390/en19102488 - 21 May 2026
Abstract
The main challenge of hydrogen electrolysis lies in the high cost of hydrogen production. Achieving a decarbonized energy sector requires substantial investment to shift from carbon-intensive technologies to more sustainable alternatives. However, investment decisions in this context remain complex and uncertain. Currently, green [...] Read more.
The main challenge of hydrogen electrolysis lies in the high cost of hydrogen production. Achieving a decarbonized energy sector requires substantial investment to shift from carbon-intensive technologies to more sustainable alternatives. However, investment decisions in this context remain complex and uncertain. Currently, green hydrogen projects account for more than 500 initiatives worldwide and are expected to expand rapidly in the coming years. Evidence from feasibility studies suggests that green hydrogen produced from renewable energy is already technically viable and is approaching economic competitiveness. The current emphasis is on large-scale deployment and learning-by-doing processes to reduce electrolyzer costs and improve supply chain efficiency. This transition requires appropriate funding mechanisms, often involving significant public sector participation alongside private investment. This study analyzes the financing structures of green hydrogen projects in Germany, Australia, and Brazil using Principal Component Analysis (PCA) to identify the most relevant combinations of technical, economic, and financial variables. Unlike previous studies that address technical, economic, and financial dimensions in isolation, this study offers an integrated, empirically grounded analysis at the project level, combining cross-country comparison with a multivariate approach. The results indicate that project characteristics are strongly associated with capital intensity and financing structures, while cost variables such as levelized cost of hydrogen (LCOH) play a secondary role in explaining variation across projects. These findings suggest that financing arrangements—particularly those involving public support mechanisms—are closely associated with project configuration in this emerging sector. However, these results should be interpreted as patterns of statistical association rather than evidence of causal relationships. Overall, the analysis highlights the importance of coordinated financing strategies in supporting the development of green hydrogen and its potential contribution to emissions reduction in line with the Paris Agreement and the transition toward climate neutrality. Full article
(This article belongs to the Special Issue Advances in Green Hydrogen Energy Production)
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25 pages, 4200 KB  
Article
Optimizing Biogas-to-Hydrogen Conversion Under the Feed-In Premium Scheme: A Comparative Analysis of Steam Reforming and Electrolysis in an Individual Biogas Plant
by Shiho Ishikawa, Nicholas O’Connell and Raphael Lechner
Energies 2026, 19(5), 1119; https://doi.org/10.3390/en19051119 - 24 Feb 2026
Viewed by 511
Abstract
The transition toward market-oriented renewable energy policies has increased the demand for flexible operation of biogas plants (BGPs), particularly under Japan’s Feed-in Premium (FIP) scheme. This study evaluates the technical performance and revenue potential of integrating hydrogen production into a dairy-manure-based BGP, focusing [...] Read more.
The transition toward market-oriented renewable energy policies has increased the demand for flexible operation of biogas plants (BGPs), particularly under Japan’s Feed-in Premium (FIP) scheme. This study evaluates the technical performance and revenue potential of integrating hydrogen production into a dairy-manure-based BGP, focusing on steam reforming (SR) and electrolysis (EL) pathways. An energy system optimization model was developed using the Open Energy Modelling Framework (OEMOF) to simulate coordinated operation of biogas combined heat and power (CHP), hydrogen production, heat supply, and storage under electricity spot market conditions in Hokkaido, Japan. Sensitivity and scenario analyses were conducted to examine hydrogen production behavior, system-level resource allocation, and revenue performance under varying hydrogen prices and FIP levels. The results show that EL enables price-responsive switching between electricity supply and hydrogen production, resulting in dynamic hydrogen output and high sensitivity to conditions. In contrast, SR provides stable hydrogen production through continuous biogas utilization, achieving biogas throughput but limited responsiveness to price fluctuations. A System-level trade-off between conversion flexibility and direct fuel utilization efficiency was identified. These findings indicate that hydrogen pathway selection in farm-scale BGPs should be treated as a system design decision shaped by market exposure, operational objectives, and risk tolerance under the FIP framework. Full article
(This article belongs to the Special Issue Advances in Green Hydrogen Energy Production)
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27 pages, 10006 KB  
Article
Analysis About the Leaks and Explosions of Alternative Fuels
by José Miguel Mahía-Prados, Ignacio Arias-Fernández, Manuel Romero Gómez and Sandrina Pereira
Energies 2026, 19(2), 514; https://doi.org/10.3390/en19020514 - 20 Jan 2026
Cited by 1 | Viewed by 633
Abstract
The maritime sector is under growing pressure to decarbonize, driving the adoption of alternative fuels such as methane, methanol, ammonia, and hydrogen. This study evaluates their thermal behavior and associated risks using Engineering Equation Solve software for heat transfer modeling and Areal Locations [...] Read more.
The maritime sector is under growing pressure to decarbonize, driving the adoption of alternative fuels such as methane, methanol, ammonia, and hydrogen. This study evaluates their thermal behavior and associated risks using Engineering Equation Solve software for heat transfer modeling and Areal Locations of Hazardous Atmospheres software for dispersion and explosion analysis in pipelines and storage scenarios. Results indicate that methane presents moderate and predictable risks, mainly from thermal effects in fires or Boiling Liquid Expanding Vapor Explosion events, with low toxicity. Methanol offers the safest operational profile, stable at ambient temperature and easily manageable, though it remains slightly flammable even when diluted. Ammonia shows the greatest toxic hazard, with impact distances reaching several kilometers even when emergency shutoff systems are active. Hydrogen, meanwhile, poses the most severe flammability and explosion risks, capable of autoignition and generating destructive overpressures. Thermal analysis highlights that cryogenic fuels require complex insulation systems, increasing storage costs, while methanol and gaseous hydrogen remain thermally stable but have lower energy density. The study concludes that methanol is the most practical transition fuel, when comparing thermal behavior and associated risks, while hydrogen and ammonia demand further technological and regulatory development. Proper insulation, ventilation, and automatic shutoff systems are essential to ensure safe decarbonization in maritime transport. Full article
(This article belongs to the Special Issue Advances in Green Hydrogen Energy Production)
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Review

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24 pages, 6799 KB  
Review
Review on Gas Production Patterns, Flammability, and Detection Methods of Hydrogen-Containing Flammable Gases During Thermal Runaway Process in Lithium-Ion Batteries
by Chenglong Wei, Yuwu Cai, Jingjing Xu, Xinyi Zhao, Qiang Liao, Yuming Chen, Yong Cao and Bin Li
Energies 2026, 19(2), 398; https://doi.org/10.3390/en19020398 - 14 Jan 2026
Viewed by 941
Abstract
As the core technology of the new energy revolution, lithium-ion batteries have broad development prospects and significant strategic importance. With continuous improvements in energy density, enhanced safety, and breakthroughs in fast-charging technology, lithium-ion batteries will play a more substantial role in fields such [...] Read more.
As the core technology of the new energy revolution, lithium-ion batteries have broad development prospects and significant strategic importance. With continuous improvements in energy density, enhanced safety, and breakthroughs in fast-charging technology, lithium-ion batteries will play a more substantial role in fields such as new energy vehicles and energy storage. Nevertheless, the development of the lithium-ion battery industry still faces safety issues related to thermal runaway risks. The intense exothermic reactions during thermal runaway can release flammable gases, potentially leading to uncontrolled combustion or explosions, thereby posing major safety threats. This paper reviews the analysis of gas composition and patterns during lithium-ion battery thermal runaway under different conditions, as well as research on gas explosion characteristics. It introduces advanced methods for gas detection and suppression during thermal runaway and summarizes studies on the chemical kinetic mechanisms and predictive models of gas generation during thermal runaway. These studies provide a scientific basis for improving the reliability of renewable energy storage systems and formulating and refining battery safety standards. Full article
(This article belongs to the Special Issue Advances in Green Hydrogen Energy Production)
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