International Journal of Hydrogen Energy最新文献

{"title":"Green synthesis of NiFe2O4@CdS core-shell nanocatalysts for enhancing photocatalytic hydrogen production","authors":"Fakiha El-Taib Heakal ,&nbsp;Amany M. Hamad ,&nbsp;Mohamed Awed ,&nbsp;Sarah A. Qutb ,&nbsp;Amany S. Hegazy ,&nbsp;Nada S. Abdel Salam ,&nbsp;Mohamed G. Frrag ,&nbsp;Haitham M. El-Bery","doi":"10.1016/j.ijhydene.2025.151691","DOIUrl":"10.1016/j.ijhydene.2025.151691","url":null,"abstract":"<div><div>This study presents the green synthesis and characterization of NiFe₂O₄@CdS core-shell nanocatalysts for enhanced photocatalytic sustainable hydrogen production. An eco-friendly approach was adopted to fabricate cadmium sulfide (CdS) nanoparticles using watermelon rind (WR), banana peel (BP) extracts, and nickel ferrite (NiFe₂O₄) nanoparticles using star anise (SA) extract. The synthesized nanoparticles were characterized through scanning electron microscopy (SEM), Energy dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), dynamic light scattering (DLS), zeta potential measurements, X-ray diffraction (XRD), and UV–Vis spectroscopy to investigate their structural, morphological, and optical properties. The integration of CdS with NiFe₂O₄ aimed to overcome limitations such as charge carrier recombination and photo corrosion, commonly encountered in conventional CdS-based photocatalysts. The core-shell structure demonstrated superior photocatalytic performance for hydrogen evolution. Photocatalytic hydrogen production analysis showed that NiFe₂O₄(300 °C)@BP-CdS achieved the most remarkable hydrogen evolution average rate of 1220.6 μmol g⁻¹ h⁻¹ after 5 h of irradiation, surpassing both the as-prepared and 600 °C calcined samples. The enhanced activity is ascribed to improved charge separation and elevated light absorption from the refined calcination procedure. Photoelectrochemical assessments, including chronoamperometry (CA) and electrochemical impedance spectroscopy (EIS), also validated the enhanced photocurrent response and reduced charge transfer resistance of the NiFe₂O₄/CdS nanocomposite compared to its bare CdS. These findings underscore the potential of green-synthesized NiFe₂O₄@CdS nanocatalysts in advancing sustainable hydrogen production technologies. The findings contribute to both environmental preservation and economic sustainability.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"179 ","pages":"Article 151691"},"PeriodicalIF":8.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156915","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":"Synergistic activation of catalytic sites in NiFe−LDH architectures via coupling with nitrogen doped carbon/Mo2TiC2TX−MXene for high-efficiency alkaline oxygen evolution reaction","authors":"B.S. Shreemuke ,&nbsp;P. Nitesh ,&nbsp;T.R. Naveen Kumar ,&nbsp;C. Sengottaiyan ,&nbsp;Amreetha Seetharaman ,&nbsp;Arun Thirumurugan ,&nbsp;Manikandan Kandasamy ,&nbsp;T. Kavinkumar","doi":"10.1016/j.ijhydene.2025.151747","DOIUrl":"10.1016/j.ijhydene.2025.151747","url":null,"abstract":"<div><div>Green hydrogen production via electrocatalytic water splitting is often hindered by the sluggish kinetics of the oxygen evolution reaction (OER) at the anode. Therefore, developing highly efficient and cost-effective OER electrocatalysts is crucial in addressing the growing global energy demand. Among various candidates, NiFe–LDH (NF) nanostructures have shown great promise as OER electrocatalysts; however, their performance is significantly hindered by poor electronic conductivity and limited exposure of active catalytic sites. Herein, we present a novel OER electrocatalyst (NFMN), fabricated by anchoring NF nanostructures onto a hybrid support of Mo₂TiC₂T_X MXene (MX) and nitrogen-doped carbon (NC), which facilitates efficient electron transport. The resultant NFMN hybrid productively enhances the available surface area for catalytic interactions and improves the interface between the catalyst and the electrolyte. Notably, the strong synergistic electronic interactions among NF, MX, and NC in the NFMN catalyst result in outstanding OER performance, delivering a low overpotential of 259.7 mV at 100 mA cm⁻², along with decent stability over 100 h. Besides, a water-splitting device was constructed using NFMN as the anode and commercial Pt/C as the cathode, requiring a cell voltage of only 1.52 V to achieve 10 mA cm⁻² in alkaline solution. More impressively, it also demonstrated excellent durability, maintaining stable performance for over 50 h. Density functional theory (DFT) calculations further unveil that the incorporation of MX and NC significantly enhances the OER activity by strengthening interactions with OER intermediates. Moreover, the charge transfer occurs across the interface in NF@MX and NF@NC hybrids, highlighting strong interfacial interactions. This work offers a new pathway for designing and engineering advanced hybrid materials for next-generation renewable energy applications.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"179 ","pages":"Article 151747"},"PeriodicalIF":8.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218189","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":"Hydrogen generation via hydrolysis of Si/CaH2 composite: performance evaluation and application","authors":"Boan Cui ,&nbsp;Jiahao Zhao ,&nbsp;Yuanyuan Liu ,&nbsp;Gangqiang Wu ,&nbsp;Jinlong Cui","doi":"10.1016/j.ijhydene.2025.151727","DOIUrl":"10.1016/j.ijhydene.2025.151727","url":null,"abstract":"<div><div>Si-based hydrolysis hydrogen production is considered a promising green hydrogen generation technology due to its ability to rapidly release hydrogen under ambient temperature and pressure, with non-toxic and pollution-free reaction products. However, the intrinsic chemical inertness of silicon and the rapid formation of a dense SiO₂ passivation layer on its surface in aqueous environments severely hinder its reaction with water, thereby limiting the hydrolysis reaction rate and hydrogen production efficiency. In this work, waste silicon powder was mixed with calcium hydride (CaH₂) via ball milling to prepare Si/CaH₂ composite materials. The key factors influencing their hydrolysis performance were investigated by varying the ball milling time and hydrolysis conditions. The Si/CaH₂@15h sample exhibited a high hydrogen yield of 1049 mL/g and an impressive hydrogen generation efficiency of 91.06 % when hydrolyzed in 0.5 M NaF solution. This composite material also demonstrated excellent hydrogen generation performance in fuel cell testing, achieving effective hydrogen-to-electricity conversion. This study provides a new approach for Si-based hydrolysis hydrogen production and photovoltaic resource recycling, offering a scalable method for fuel cell applications.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"179 ","pages":"Article 151727"},"PeriodicalIF":8.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156897","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":"Enhancing the oxidation resistance in Ti–V–Mn hydrogen storage alloy by adding Zr8Ni21","authors":"Kaixiang Wang,&nbsp;Xiaoyu Chen,&nbsp;Qihao Xiang,&nbsp;Bin Liu,&nbsp;Qiang Tao","doi":"10.1016/j.ijhydene.2025.151738","DOIUrl":"10.1016/j.ijhydene.2025.151738","url":null,"abstract":"<div><div>BCC-type hydrogen storage alloys suffer from rapid oxidation degradation. This study demonstrates that incorporating 10 wt% Zr₈Ni₂₁ intermetallic compound into Ti₃₇V₄₀Mn₂₃ significantly enhances its oxidation resistance and preserves hydrogen storage capacity. The results revealed that the hydrogen absorption capacity (at 303 K) of Ti₃₇V₄₀Mn₂₃ alloy decreased drastically from 3.10 wt% to 0.64 wt% after just one day of exposure to air, indicating severe oxidation. The newly developed alloy maintained the hydrogen absorption capacity (at 303 K) of 2.81 wt% even after 90 days of air exposure; and its hydrogen desorption capacity (at 303 K) remained at 99.2 % of the original value. Long-term oxidation slightly reduced desorption plateau pressure and decreased desorption enthalpy to 31.2 kJ/mol H₂, indicating reduced hydride stability. The superior performance stems from: (i) Zr₈Ni₂₁ addition reducing surface metal oxides while increasing oxygen vacancies, facilitating H-diffusion from the surface to the bulk; (ii) Zr's strong oxygen affinity enabling sacrificial early-stage oxidation, protecting the BCC phase; and (iii) absence of oxygen-enriched phases, maintaining an unoxidized alloy core.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"179 ","pages":"Article 151738"},"PeriodicalIF":8.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156898","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":"In situ investigation of high-pressure hydrogen-induced swelling in elastomers and its correlation with material properties","authors":"Wenbin Kuang ,&nbsp;Ethan K. Nickerson ,&nbsp;Yongsoon Shin ,&nbsp;M.F.N. Taufique ,&nbsp;Dustin T. Clelland ,&nbsp;Robert J. Seffens ,&nbsp;Kevin L. Simmons","doi":"10.1016/j.ijhydene.2025.151315","DOIUrl":"10.1016/j.ijhydene.2025.151315","url":null,"abstract":"<div><div>The resistance of elastomeric materials to high-pressure hydrogen-induced damage is essential for ensuring the reliability of hydrogen infrastructure. In this study, we systematically investigated the swelling behavior and hydrogen transport properties of four elastomer types – EPDM, NBR, FKM, and HNBR – using a custom in-situ view cell system capable of real-time monitoring during decompression from pressures up to 96.5 MPa. Each elastomer was formulated with and without fillers and plasticizers to assess the effects of formulation on swelling response. Thermal desorption analysis (TDA) was employed to determine equilibrium hydrogen content and diffusion coefficients, providing insight into gas uptake and mobility within each material. Correlation analyses using Pearson and Spearman coefficients revealed that the diffusion coefficient showed a stronger relationship with swelling behavior than hydrogen content, highlighting the dominant role of hydrogen mobility. Filled elastomers, particularly those with carbon black, consistently showed reduced swelling due to enhanced stiffness and reduced diffusivity. These results deepen our understanding of diffuso-mechanical interactions in elastomers and support the rational design of sealing materials for high-pressure hydrogen systems.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"179 ","pages":"Article 151315"},"PeriodicalIF":8.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156912","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":"Mapping current research on hydrogen supply chain design for global trade","authors":"Leslie A. Aguirre-García,&nbsp;Jairo R. Montoya-Torres,&nbsp;Martha Cobo","doi":"10.1016/j.ijhydene.2025.151726","DOIUrl":"10.1016/j.ijhydene.2025.151726","url":null,"abstract":"<div><div>Global demand for clean energy carriers like hydrogen (H₂) is rising under carbon-reduction policies. While domestic H₂ projects are progressing, international trade presents significant opportunities for countries with abundant renewables or advanced production capabilities. Yet, establishing H₂ as a viable global commodity requires overcoming supply chain challenges in flexibility, efficiency, and cost. This review examines hydrogen supply chain network design (HSCND) studies and highlights key research gaps in export-oriented systems. Current work often focuses on transport technologies but lacks integrated analyses combining technical, economic, and policy dimensions. Notable gaps include limited research on retrofitting infrastructure for H₂ derivatives, underexplored roles of ports as export hubs, and insufficient evaluation of regulatory frameworks and financial risks. This review proposes a methodological approach to guide HSCND for export, supporting data collection and strategic planning. Future research should integrate technical, geopolitical, and social factors into models, backed by methodological innovation and empirical evidence.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"179 ","pages":"Article 151726"},"PeriodicalIF":8.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156996","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":"Effects of methane addition on ammonia flame heat release characteristics","authors":"He Liang,&nbsp;Xingqing Yan,&nbsp;Jianliang Yu","doi":"10.1016/j.ijhydene.2025.151619","DOIUrl":"10.1016/j.ijhydene.2025.151619","url":null,"abstract":"<div><div>Blending ammonia with methane for combustion is a promising low-carbon strategy that overcomes the inherently low reactivity and slow flame speed of ammonia. In this work, a reduced mechanism for ammonia/methane combustion is employed, and the fundamental combustion characteristics of premixed ammonia/methane/air flames are investigated via numerical simulations, with a focus on heat release, flame speed, and NO formation under various blending ratios and initial pressures. The results indicate that the addition of methane significantly enhances flame propagation and thermal characteristics. The laminar flame speed, adiabatic flame temperature, and peak net heat release rate all increase monotonically with an increasing methane blending ratio. Sensitivity analysis reveals that the elementary reaction H + O₂<img>O + OH is dominant under all investigated conditions. An increase in initial pressure reduces the laminar burning velocity by promoting pressure-dependent chain-termination reactions. The NO concentration exhibits a non-monotonic behavior with methane addition, reaching its peak at a methane blending ratio of approximately 0.5–0.7. Rate of production analysis shows that whereas excessive amounts or fuel-rich conditions promote radical-driven NO reduction, leading to a decrease in net NO. These findings provide fundamental insights into the chemical kinetics governing NH₃/CH₄ co-firing and offer guidance for optimizing low-emission combustion systems.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"179 ","pages":"Article 151619"},"PeriodicalIF":8.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156901","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":"Synergistic enhancement of solar-driven hydrogen evolution via Ni-doped TiO2–MXene hybrid photocatalyst","authors":"Jarosław Serafin ,&nbsp;Xavier Vendrell ,&nbsp;Bartosz Dziejarski ,&nbsp;Roger Amade ,&nbsp;Lourdes Mestres ,&nbsp;Isabel Serrano ,&nbsp;Jordi Llorca","doi":"10.1016/j.ijhydene.2025.151722","DOIUrl":"10.1016/j.ijhydene.2025.151722","url":null,"abstract":"<div><div>Developing high-efficiency photocatalysts for sustainable hydrogen production is a key priority in solar energy conversion. Here, we present a TiO₂-based photocatalyst co-modified with nickel dopants and Ti₃C₂T_x MXene to improve light absorption, charge separation, and interfacial charge transport. The hybrid material was synthesized via HF etching of Ti₃AlC₂ MAX phase followed by nickel doping and thermal calcination. Physicochemical characterization (XRD, SEM/TEM, XPS, UV–Vis, PL, FTIR, Raman) confirmed successful integration of TiO₂, Ni²⁺ species, and partially oxidized MXene sheets. Electrochemical impedance spectroscopy (EIS) and transient photocurrent response measurements revealed improved charge mobility and reduced recombination. Among the samples tested, the TiO₂–2 % Ni–10 % MXene composite showed the best performance, achieving a hydrogen evolution rate of 47.2 mmol h⁻¹ g⁻¹ and an apparent quantum yield of 5.5 % under UV light. This enhanced activity results from the synergistic effects of Ni doping (introducing shallow traps and promoting proton reduction) and the conductive MXene phase (facilitating charge transfer and providing active sites). The study offers a scalable dual-modification strategy for designing efficient TiO₂-based photocatalysts and contributes valuable insights into the rational development of advanced materials for solar-driven hydrogen generation.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"179 ","pages":"Article 151722"},"PeriodicalIF":8.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156994","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":"From scrap tyres to jet fuel: Hydrogen integration and economic feasibility within a circular economy framework","authors":"Ali Gunerhan ,&nbsp;Onder Altuntas ,&nbsp;Hakan Caliskan","doi":"10.1016/j.ijhydene.2025.151735","DOIUrl":"10.1016/j.ijhydene.2025.151735","url":null,"abstract":"<div><div>This study presents an innovative approach to producing sustainable aviation fuel from scrap tyres within the framework of the circular economy. The pyrolysis process decomposes scrap tyres into char, oil, and gas products. The pyrolysis oil is then refined into jet fuel through catalytic cracking, alkylation, and hydrotreating processes. Meanwhile, the pyrolysis syngas is used as feedstock for hydrogen production via the steam reforming process. As a result, it was calculated that approximately 93,074.4 tonnes/year of sustainable aviation fuel could be produced from 202,200 tonnes of scrap tyres per year. Additionally, 3796.26 tonnes of hydrogen could be produced annually from pyrolysis syngas. Finally, the estimated minimum selling prices of jet fuel and hydrogen were $0.86/L and $2.79/kg, respectively. Previous research has shown that the hydrogen used to refine pyrolysis oil comes from external sources. However, this study shows that all the hydrogen needed for the refining processes can be obtained from the pyrolysis syngas itself. To the best of our knowledge, this approach has not been adopted before in the literature. The proposed model not only enables low-cost production of sustainable aviation fuel but also contributes to sustainable waste management practices.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"179 ","pages":"Article 151735"},"PeriodicalIF":8.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218187","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":"Effect of hydrogen on soot formation in laminar ammonia-ethylene diffusion flames","authors":"Xiuyong Shi ,&nbsp;Haiyan Xu ,&nbsp;Weiwei Qian ,&nbsp;Yong Liu ,&nbsp;Xuwei Luo ,&nbsp;Yunhua Zhang","doi":"10.1016/j.ijhydene.2025.151657","DOIUrl":"10.1016/j.ijhydene.2025.151657","url":null,"abstract":"<div><div>Hydrogen and ammonia, as carbon-free fuels, are widely recognized as alternative fuels for combustion systems. This study investigates the comparative impacts of hydrogen and ammonia on soot formation in ethylene-based and ethylene–ammonia diffusion flames via numerical simulations. In ethylene flames, hydrogen addition enhances soot formation by increasing H radical concentrations, which accelerate chain-initiating reactions and promote the production of reactive intermediates such as C₂H₃ and C₃H₃, thereby intensifying PAH growth and soot accumulation. Conversely, ammonia predominantly lowered the radical concentrations and suppressed precursor formation. In ethylene–ammonia flames, however, hydrogen addition reduces soot volume fraction primarily via dilution, with chemical effects contributing secondarily. Although hydrogen promotes ethylene decomposition, it simultaneously shifts key reaction pathways by diverting intermediates such as C₂H₂ toward oxidation rather than PAH synthesis, thus weakening soot growth. Overall, hydrogen plays a dual role in soot evolution: enhancing soot formation in hydrocarbon-rich environments while suppressing it in ammonia-containing systems through both dilution and radical-pathway modulation.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"179 ","pages":"Article 151657"},"PeriodicalIF":8.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156900","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}