High-Effective Energy Conversion for Sustainable Environment

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Sustainable Processes".

Deadline for manuscript submissions: 31 August 2026 | Viewed by 2464

Special Issue Editor


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Guest Editor
Laboratoire des Procédés, Matériaux et Environnement (LPME), Faculté Polydisciplinaire (FP-Taza), Université Sidi Mohammed Ben Abdellah, Taza BP. 1223, Morocco
Interests: catalysis; energy conversion; materials; environment

Special Issue Information

Dear Colleagues,

Energy conversion and environmental sustainability are two interdependent concepts with closely related challenges. The transition to a sustainable future relies on innovative materials and processes to optimize energy conversion. Developing smart materials, advanced semiconductors, sustainable catalysts, and efficient storage solutions, improves energy efficiency while reducing environmental impact. Contemporary processes, such as optimized electrolysis or CO2 capture and conversion techniques, promote the production of clean energy from renewable sources. These technologies support the decarbonization of industrial sectors, transportation, and energy networks while ensuring sustainable resource management.

This Special Issue highlights innovations in materials and processes, emphasizing their role in creating resilient and environmentally friendly energy systems. Key areas include heterogeneous catalysis for renewable energy, with an emphasis on materials and processes that support hydrogen evolution, CO2 conversion, and biofuel production. In addition, we aim to focus on photocatalysis and electrocatalysis, enabling solar-driven and electrochemical reactions to transform energy storage and conversion processes.

Challenges, such as cost optimization and scalability, will also be explored. By combining interdisciplinary research and practical solutions, these advances pave the way for a green economy, where energy efficiency and sustainability are central to comprehensive strategies for a carbon-neutral future.

Manuscripts that will be prioritized for this Special Issue include research articles and critical reviews that align with its scope.

Dr. Jamil Toyir
Guest Editor

Manuscript Submission Information

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Keywords

  • materials
  • processes
  • energy efficiency
  • decarbonization
  • renewable energies
  • sustainable environment
  • carbon neutrality

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Published Papers (2 papers)

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Review

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17 pages, 738 KB  
Review
Recent Advances in the Development of Noble Metal-Free Cathode Catalysts for Microbial Fuel Cell Technologies
by Farah Lachquer, Noureddine Touach, Abdellah Benzaouak and Jamil Toyir
Processes 2026, 14(3), 440; https://doi.org/10.3390/pr14030440 - 27 Jan 2026
Cited by 1 | Viewed by 892
Abstract
The accelerating growth of the global population and the depletion of conventional energy resources have intensified the dual challenges of water scarcity and sustainable energy production. Microbial fuel cells (MFCs) have emerged as a promising bioelectrochemical technology capable of simultaneously treating wastewater and [...] Read more.
The accelerating growth of the global population and the depletion of conventional energy resources have intensified the dual challenges of water scarcity and sustainable energy production. Microbial fuel cells (MFCs) have emerged as a promising bioelectrochemical technology capable of simultaneously treating wastewater and generating renewable electricity. Their performance is strongly dependent on electrode materials, particularly cathodes, which govern the kinetics of the oxygen reduction reaction (ORR) and overall energy conversion efficiency. Therefore, in order to improve the electro-kinetics of ORR, it is necessary to use catalysts with specific catalytic properties. An ideal catalyst for ORR must combine fast kinetics, high conductivity, high durability, and cost-effectiveness. Although platinum-based electrodes remain the most efficient ORR catalysts, their scarcity and prohibitive cost are hindering their commercialization. Therefore, research has focused on viable alternatives, such as metal oxides, perovskites, heterojunction composites, and emerging carbon-based materials, paving the way toward highly effective energy conversion and industrial-scale implementation of MFCs. Full article
(This article belongs to the Special Issue High-Effective Energy Conversion for Sustainable Environment)
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Other

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19 pages, 1706 KB  
Systematic Review
The Role of Hydraulic Turbines in the Energy Transition: A Systematic Review of Methods for Evaluating and Optimizing Hydropower Plant Operation
by Gheorghe Daniel Lakatos, Roxana Maria Albu (Druța), Andreea Loredana Rhazzali, Sára Ferenci, Lucian Ionel Cioca, Radu Adrian Munteanu and Loránd Szabó
Processes 2026, 14(5), 841; https://doi.org/10.3390/pr14050841 - 5 Mar 2026
Viewed by 826
Abstract
Hydropower plants remain strategic assets for grid stability and decarbonization, with hydraulic turbines governing conversion efficiency, reliability, and environmental performance. This systematic review synthesizes recent methodologies for evaluating and optimizing turbine operation and maintenance to enhance efficiency, reduce impacts, and extend service life. [...] Read more.
Hydropower plants remain strategic assets for grid stability and decarbonization, with hydraulic turbines governing conversion efficiency, reliability, and environmental performance. This systematic review synthesizes recent methodologies for evaluating and optimizing turbine operation and maintenance to enhance efficiency, reduce impacts, and extend service life. Following a PRISMA-aligned protocol, studies published between 2020 and 2025 were screened across Web of Science and Scopus, using predefined eligibility criteria and a two-stage selection process. The resulting evidence was thematically analyzed across three domains: lifecycle and circular-economy-oriented refurbishment strategies; digitalization and predictive maintenance approaches; and environmentally optimized operating regimes. Of the 115 screened records, 37 met the inclusion criteria. Findings indicate that predictive monitoring, data-driven maintenance, and turbine selection tailored to local hydrology can significantly improve energy performance while reducing operation and maintenance costs. The literature also highlights the importance of ecological flow compliance and reduced aquatic impacts. Complementary case studies from Nepal, Switzerland, Germany, Portugal, and Romania illustrate regional challenges and modernization pathways. Overall, the review underscores the need for integrated, multi-objective turbine management that aligns techno-economic, lifecycle, and ecological considerations to support hydropower competitiveness within the energy transition. Full article
(This article belongs to the Special Issue High-Effective Energy Conversion for Sustainable Environment)
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