International Journal of Hydrogen Energy最新文献

{"title":"Innovative sulfur-based photocatalysts for seawater splitting: Synthesis strategies, engineering advances, and prospective pathways for sustainable hydrogen production","authors":"Malaz Suliman,&nbsp;Muhammad Tahir","doi":"10.1016/j.ijhydene.2025.151645","DOIUrl":"10.1016/j.ijhydene.2025.151645","url":null,"abstract":"<div><div>While hydrogen production through pure water splitting remains a key focus in solar hydrogen research, photocatalytic seawater splitting presents a more sustainable alternative, better aligned with global development goals amid increasing freshwater scarcity. Nevertheless, the deactivation of the photocatalyst by the corrosion of various ions present in seawater, as well as the chloride ions' redox side reaction, limits the practical use of the photocatalytic seawater splitting process. In this context, sulfur has emerged as a crucial component in photocatalytic composites for seawater splitting, owing to its unique chemical properties. It acts as a chlorine-repulsive agent, effectively suppressing chloride ion oxidation, which mitigates corrosion, enhances structural stability, and significantly improves overall photocatalytic performance in saline environments. This review offers a thorough explanation of the basic ideas of solar-driven seawater splitting, delves into various synthesis strategies, and explores recent advancements in sulfur-based composites for efficient hydrogen generation using seawater. Optimizing synthesis techniques and incorporating strategies like doping, cocatalyst, and heterojunctions significantly enhance the performance of sulfur-based photocatalysts for seawater splitting. Future advances include integrating AI-guided material discovery, sustainable use of industrial sulfur waste, and precise control of sacrificial agents to ensure long-term efficiency and stability.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"181 ","pages":"Article 151645"},"PeriodicalIF":8.3,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145189662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recent advances in metal-organic frameworks for solid-state hydrogen storage: Synthesis, optimization, and perspectives","authors":"Haocheng Li ,&nbsp;Shan Ren ,&nbsp;Yiyun Guo ,&nbsp;Dianyue An ,&nbsp;Rui Nan ,&nbsp;Shouning Chai ,&nbsp;Chunli Zheng ,&nbsp;Bofeng Bai","doi":"10.1016/j.ijhydene.2025.151746","DOIUrl":"10.1016/j.ijhydene.2025.151746","url":null,"abstract":"<div><div>Hydrogen energy is recognized as a promising secondary energy for sustainable development due to its high calorific value and environmental friendliness, yet its widespread applications are currently hindered by inefficient storage and need good storage methods to realize. Metal-Organic Frameworks (MOFs) have attracted significant attention as the promising materials for solid-state hydrogen storage (SHS) due to their high surface area, porosity, and structural tunability. A great deal of researches has demonstrated MOFs possess high hydrogen storage capacity in low-temperature and high-pressure conditions. This review provides a systematic overview of the synthesis methods of MOFs, optimization methodology, and the perspectives for future development. The synthesis methods of MOFs, including the solvothermal or hydrothermal method, microwave-assisted method, ultrasound-assisted method, electrochemical method, and mechano-chemical method, etc., were discussed and compared. Also, the optimization includes the structural design and post-synthesis modification, and they were introduced and analyzed in detail. Finally, the possible development direction of synthesis and optimization the MOFs for the future hydrogen storage practical applications was proposed. It aims to provide insights into the improvement of the hydrogen storage efficiency of MOFs, contributing to the realization of a sustainable hydrogen economy.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"181 ","pages":"Article 151746"},"PeriodicalIF":8.3,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145189660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Self-supporting RuO2/NiCo2O4 heterojunction with engineered charge balance and oxide path mechanism for acidic oxygen evolution","authors":"Lianhua Chen ,&nbsp;Jieyu Yang ,&nbsp;Chenyu Zhang,&nbsp;Jie Li,&nbsp;Wenzhang Li,&nbsp;Ting Zhou,&nbsp;Yanqiu Wang,&nbsp;Yang Liu","doi":"10.1016/j.ijhydene.2025.151787","DOIUrl":"10.1016/j.ijhydene.2025.151787","url":null,"abstract":"<div><div>RuO₂, renowned as the active catalyst for acidic oxygen evolution reaction (OER), faces significant limitations due to its poor stability and high cost. In this study, we constructed RuO₂/NiCo₂O₄ heterojunction on carbon paper (CFP) as an efficient and durable catalyst for acidic OER. The self-supporting structure facilitates enhanced electron and mass transfer, while the interfacial interaction between RuO₂ and NiCo₂O₄ modified the electronic structure of Ru sites, and oxide path mechanism (OPM) was activated due to the exist of dual-active sites. Besides, NiCo₂O₄ serves as an electron reservoir to regulate the charge state of Ru. Prior to the reaction, electron transfer from Ru to NiCo₂O₄ generates high-valent Ru species, ensuring high catalytic activity. At high potential, Ni supplies electrons to Ru and Co sites, guaranteeing material stability. As a result, RuO₂/NiCo₂O₄/CFP require only 187 mV overpotential to achieve a current density of 10 mA cm⁻², and presenting good durability within 283 h. This work presents a simple yet effective strategy to enhance both the mass activity and stability of RuO₂-based OER catalysts.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"181 ","pages":"Article 151787"},"PeriodicalIF":8.3,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A flow-type decoupled electrolysis system based on Fe2+/Fe3+ redox couple for hydrogen generation under the fluctuating solar irradiation","authors":"Zizuo Liu ,&nbsp;Jiazhe Wu ,&nbsp;Zilong Zeng ,&nbsp;Liwu Zhou ,&nbsp;Yutong Chen ,&nbsp;Ze Ren ,&nbsp;Chenglin Fu ,&nbsp;Dengwei Jing ,&nbsp;Yubin Chen","doi":"10.1016/j.ijhydene.2025.151759","DOIUrl":"10.1016/j.ijhydene.2025.151759","url":null,"abstract":"<div><div>To overcome the challenges associated with conventional water electrolysis, such as high onset potential, gas crossover, and the limited stability under intermittent renewable energy sources, this study presents a flow-type decoupled electrolysis system based on the Fe²⁺/Fe³⁺ redox couple, enabling efficient, stepwise hydrogen production under low-voltage conditions. The Fe²⁺/Fe³⁺ redox couple was demonstrated to enable efficient electron transfer across spatially separated electrodes, highlighting its suitability for decoupled electrolysis configurations. Unlike traditional proton exchange membrane electrolyzer cells (PEMECs), our design maintains stable operation under variable voltage conditions and seamlessly integrates with intermittent solar energy generation. It achieved a high Faradaic efficiency of 98.2 % at a current density of 50 mA cm⁻², with an average hydrogen evolution reaction (HER) voltage of 0.67 V lower than PEMECs with the same structure. Notably, the corresponding solar-to-hydrogen efficiency could reach 20.76 % under the full solar spectrum and maintain 12.7 % under the cloudy conditions. Moreover, the system features a cost-effective design, with electrolyte expenses approximately 80 % lower than vanadium-based systems. Combined with its robust electrochemical stability and inherent scalability, this configuration offers a promising approach for decentralized, solar-driven hydrogen production.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"181 ","pages":"Article 151759"},"PeriodicalIF":8.3,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimal energy management of sustainable hydrogen-based forestry operations with grid and hydrogen network support","authors":"Alper Çiçek","doi":"10.1016/j.ijhydene.2025.151791","DOIUrl":"10.1016/j.ijhydene.2025.151791","url":null,"abstract":"<div><div>The decarbonization of forestry operations poses significant challenges due to the dependence on fossil-fueled equipment and the limited accessibility of energy infrastructure in remote regions. This study presents a mixed-integer linear programming (MILP)-based optimal energy management model for a zero-emission forestry ecosystem powered by renewable energy sources (RESs) and hydrogen technologies. The integrated system harnesses photovoltaic (PV) and wind power, supplemented by the power grid, to generate hydrogen, which is stored in a centralized stationary tank. A mobile hydrogen tank ensures off-grid delivery to remote forestry zones, enabling emission-free operations by supplying hydrogen to various types of forestry equipment, including log stackers, power saws, and planters. The system also connects both the power grid and hydrogen network, providing backup electricity and hydrogen support during emergency conditions, thereby enhancing operational resilience. Participation in the hydrogen certificate market is incorporated to promote economic sustainability and reward green energy use. The proposed model simultaneously minimizes total operational costs and maximizes energy resilience and grid support. The model's performance is evaluated through detailed case studies under various operating scenarios, with all test activities assumed to be conducted based on forestry operations in Kırklareli, Türkiye. The results demonstrate the system's capability to reduce greenhouse gas emissions, optimize resource allocation, and maintain reliable energy supply even in fully off-grid contexts. The best-performing case achieves a maximum economic gain of €4915. Fully off-grid systems achieve zero emissions but have limited energy output and economic performance, with a carbon emission reduction of 6.7 metric tons compared to fossil-based operations. Notably, the model demonstrated complete operational coverage for forestry machinery without reliance on fossil fuels, achieving 100 % carbon emission reduction and highlighting its viability as a decarbonized and resilient solution. These results confirm the robustness and applicability of the proposed approach, underscoring its potential to enable economically viable, zero-emission, and off-grid forestry operations.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"181 ","pages":"Article 151791"},"PeriodicalIF":8.3,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145189569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bubble growth and detachment modulated synergistically via electrolyte flow intensity and current density","authors":"Lin Yang ,&nbsp;Xiaoning Li ,&nbsp;Lingyu Gao ,&nbsp;Aiqun Kong ,&nbsp;Xinyi Huo ,&nbsp;Jiangjiexing Wu ,&nbsp;Wei Li ,&nbsp;Jinli Zhang","doi":"10.1016/j.ijhydene.2025.151752","DOIUrl":"10.1016/j.ijhydene.2025.151752","url":null,"abstract":"<div><div>Electrolytic gas evolution involves complex bubble dynamics that directly affect the efficiency of industrial electrolyzers. Electrolyte flow and current density are key factors modulating bubble growth and detachment. This study specifically investigates the synergistic regulation of hydrogen bubble behavior by electrolyte flow intensity and current density, using electrochemical measurements, high-speed imaging, and multiphysics modeling. Experimental and theoretical analyses reveal the dual effect of electrolyte flow on electrolytic gas evolution. A critical Reynolds number (<em>Re</em>_c) demarcates bubble detachment modes: below <em>Re</em>_c, buoyancy dominates and convection inhibits bubble release by enlarging the contact angle via asymmetric tilting, thereby raising the overpotential by 5–30%; above <em>Re</em>_c, flow dominates and reduces both the detachment radius and the overpotential. A Reynolds number-corrected bubble growth law in flowing electrolytes is derived, and a comprehensive force balance model incorporating thermal and solutal Marangoni effects, electrostatic interactions, and flow effect is developed. Bubble detachment radii and voltage estimation across flow regimes are predicted with errors less than 16% and 6.0% respectively. These insights extend to oxygen evolution reactions and provide a framework for optimizing electrolyzers through flow field design.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"181 ","pages":"Article 151752"},"PeriodicalIF":8.3,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145189661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Copper-modulated nickel nanoparticles embedded in nitrogen-doped carbon nanotubes for efficient electrocatalytic saline water splitting","authors":"Bo Geng,&nbsp;Rui Chen,&nbsp;Gaojie Li,&nbsp;Kaikai Liu","doi":"10.1016/j.ijhydene.2025.151780","DOIUrl":"10.1016/j.ijhydene.2025.151780","url":null,"abstract":"<div><div>Modulating the electronic structure of catalysts to enhance the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is critical for advancing efficient and durable water electrolysis. In this study, we synthesize Cu-doped Ni nanoparticles (NPs) encapsulated in nitrogen-doped carbon nanotubes (NCNT) supported on carbon cloth (CuNi@NCNT/CC) as a high-performance bifunctional electrocatalyst. Experimental characterization and density functional theory (DFT) calculations demonstrate that the CuNi synergy in CuNi@NCNT/CC optimizes the electronic structure and <em>d</em>-band center, balances the adsorption/desorption free energies of reaction intermediates, and significantly lowers the energy barriers for the rate-determining steps of HER and OER, thereby accelerating reaction kinetics. As a result, the assembled water electrolyzer achieves a low cell voltage of 1.50 V at 10 mA cm⁻² in 1.0 M KOH. Furthermore, even in 1 M KOH +0.5 M NaCl, the CuNi@NCNT/CC only requires 1.52 V to deliver 10 mA cm⁻². Additionally, the NCNT encapsulation endows the catalyst with exceptional stability, maintaining efficient overall water splitting performance for over 200 h even in 1 M KOH +0.5 M NaCl for 100 and 500 mA cm⁻². This work provides a rational design strategy for developing robust bifunctional electrocatalysts through electronic structure modulation.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"180 ","pages":"Article 151780"},"PeriodicalIF":8.3,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of the influence of hydrogen on prismatic loops and dislocation dipole structure in an austenitic steel: Effect on stacking fault energy","authors":"Ivan Gutierrez-Urrutia,&nbsp;Yuhei Ogawa,&nbsp;Akinobu Shibata","doi":"10.1016/j.ijhydene.2025.151741","DOIUrl":"10.1016/j.ijhydene.2025.151741","url":null,"abstract":"<div><div>The influence of hydrogen on crystal defects (point defects and dislocations) determines effects such as hydrogen-induced localized plasticity and damage. One of the structural variables controlling these effects is the stacking fault energy. Experimental and computational studies indicate that hydrogen reduces its value, thereby increasing the partial dislocation spacing, and influencing dislocation behavior. This study quantitatively investigates the influence of solute hydrogen (133 mass ppm) on prismatic loop and dislocation dipole structures in an austenitic steel by an approach based on scanning transmission electron microscopy (STEM) and anisotropic dislocation theory. The established method allows the estimation of the stacking fault energy with greater accuracy than approaches used in the literature. We show that hydrogen leads to several effects on crystal defects, increasing the average prismatic loop size and average dipole height of screw-type dipoles. The analysis of the dissociated dipole structure by a model based on anisotropic dislocation theory indicates that hydrogen reduces the stacking fault energy. We critically compare the present study with former reports in fcc materials and discuss the influence of hydrogen-charging conditions, imaging analysis method, and dislocation theory on the measurement of stacking fault energy. The effect of the present results on the deformation behavior is evaluated.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"180 ","pages":"Article 151741"},"PeriodicalIF":8.3,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Catalytic hydrogen combustion as heat source for the dehydrogenation of liquid organic hydrogen carriers using a novel compact autothermal reactor","authors":"C. Gescher ,&nbsp;S. Hahn ,&nbsp;C. Hornung ,&nbsp;M. Weiss ,&nbsp;T. Rüde ,&nbsp;M. Geißelbrecht ,&nbsp;P. Wasserscheid","doi":"10.1016/j.ijhydene.2025.151694","DOIUrl":"10.1016/j.ijhydene.2025.151694","url":null,"abstract":"<div><div>The experimental performance of an autothermal hydrogen release unit comprising a perhydro benzyltoluene (H12-BT) dehydrogenation chamber and a catalytic hydrogen combustion (CHC) chamber in thermal contact is discussed. In detail, the applied set-up comprised a multi-tubular CHC heating based on seven parallel tubes with the reactor shell containing a commercial dehydrogenation catalyst. In this way, the CHC heated the endothermal LOHC dehydrogenation using a part of the hydrogen generated in the dehydrogenation. The proposed heating concept for autothermal LOHC dehydrogenation offers several advantages over state-of-the-art heating concepts, including minimized space consumption, high efficiency, and zero NO_x emissions. During performance tests the process reached a minimum hydrogen combustion fraction of 37 %, while the minimum heat requirement for the dehydrogenation reaction for industrial scale plants is 33 %. The reactor orientation (vertical vs horizontal) and the flow configuration (counter-current vs. co-current) showed very little influence on the performance demonstrating the robustness of the proposed reactor design.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"180 ","pages":"Article 151694"},"PeriodicalIF":8.3,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Current developments on MIL-based metal-organic frameworks for photocatalytic hydrogen production","authors":"Khaleke V. Ramollo ,&nbsp;Kabelo E. Ramohlola ,&nbsp;Thabiso C. Maponya ,&nbsp;Nomso C. Hintsho-Mbita ,&nbsp;Kwena D. Modibane","doi":"10.1016/j.ijhydene.2025.151728","DOIUrl":"10.1016/j.ijhydene.2025.151728","url":null,"abstract":"<div><div>The escalating global energy demand has intensified research into sustainable hydrogen production, particularly through water splitting. A highly promising avenue involves photocatalytic water splitting, which leverages readily available earth-abundant materials to generate clean hydrogen from water using only renewable energy sources. Among the various catalytic materials investigated, metal-organic frameworks (MOFs) have recently attracted considerable interest. Their tunable porosity, high crystallinity, as well as the customisable molecular structures position them as a transformative class of catalysts for efficient and sustainable photocatalytic hydrogen generation. This review examines MOFs, detailing their structural characteristics, unique properties, and diverse synthetic routes. The discussion extends to the various composite materials that can be derived from MOFs, with particular emphasis on their application in photocatalytic hydrogen production via water splitting. Furthermore, the review identifies current challenges hindering MOF implementation and proposes modification strategies to overcome these limitations. The concluding section summarises the presented information and future perspectives on the continued development of MOF composites for enhanced photocatalytic hydrogen production from water.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"180 ","pages":"Article 151728"},"PeriodicalIF":8.3,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}