International Journal of Hydrogen Energy最新文献

{"title":"Dynamic behavior and Joule-Thomson characteristics analysis on flow limiter inside hydrogen On Tank Valve for hydrogen fuel cell vehicles","authors":"Chuang Liu ,&nbsp;Dong Xue ,&nbsp;Wen-qing Li ,&nbsp;Long-jie Yu ,&nbsp;Jia Zhao ,&nbsp;Ji-yuan Yang ,&nbsp;Zhi-jiang Jin ,&nbsp;Dong-yu Chen ,&nbsp;Jin-yuan Qian","doi":"10.1016/j.ijhydene.2025.03.351","DOIUrl":"10.1016/j.ijhydene.2025.03.351","url":null,"abstract":"<div><div>Hydrogen fuel cell vehicles (HFCVs) are developing rapidly due to the decarbonization. Hydrogen On Tank Valve (OTV) is a crucial device for ensuring the safety of hydrogen storage system in HFCVs. In this paper, dynamic behavior and Joule-Thomson characteristics of flow limiter inside hydrogen OTV is investigated numerically by using dynamic mesh and UDF techniques. Realizable <em>k-ε</em> model and Real-Gas-Soave-Redlich-Kwong equation of state are used for 70 MPa hydrogen. Results show that pressure drop mainly influences the deviation from equilibrium position while spring stiffness affects the fluctuation interval. Fluid forces remain stable when spring stiffness above 4 kN/mm but fluctuate significantly at 2 kN/mm. Flow rate fluctuations are divided into two stages: flow regulation stage and steady flow stage. Joule-Thomson coefficient remains stable at specific temperatures. This study can provide references for the design of OTV and the safety of HFCVs.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"123 ","pages":"Pages 162-172"},"PeriodicalIF":8.1,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759151","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":"Study of the hydrogen influence on the combustion parameters of diesel engine","authors":"Evgeni Dimitrov ,&nbsp;Mihail Peychev ,&nbsp;Atanasi Tashev","doi":"10.1016/j.ijhydene.2025.02.114","DOIUrl":"10.1016/j.ijhydene.2025.02.114","url":null,"abstract":"<div><div>The article presents the results of an experimental study on the influence of hydrogen as gaseous fuel on the combustion process parameters of a single-cylinder diesel engine operating in dual-fuel mode. The study is conducted at an average engine speed of <em>n</em> = 2000 min⁻¹, four engine load levels, and two different diesel fuel injection timing angles. Indicator diagrams are recorded for each operating mode at varying hydrogen mass fractions in the total fuel supplied to the engine. The data from the indicator diagrams are processed using a developed software that enables the determination of combustion process parameters. The analysis of the experimental results focuses on changes in cylinder temperature, the coefficients of total and active heat release, the rate of heat release, the duration of the combustion process phases, and other parameters as a function of the hydrogen mass fraction in the total fuel mixture.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"123 ","pages":"Pages 219-230"},"PeriodicalIF":8.1,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"NiFeOOH deposition on various 3D electrode geometries to influence bubble dynamics under technical relevant alkaline water electrolysis conditions","authors":"Julia Hoffmann ,&nbsp;Julia Gallenberger ,&nbsp;Nicolai Schmitt ,&nbsp;Christian Goerens ,&nbsp;Andreas Dreizler ,&nbsp;Jan Philipp Hofmann ,&nbsp;Bastian J.M. Etzold","doi":"10.1016/j.ijhydene.2025.03.298","DOIUrl":"10.1016/j.ijhydene.2025.03.298","url":null,"abstract":"<div><div>Improving alkaline water electrolysis efficiency is limited by high overpotential at the oxygen-evolving anode, especially at high current densities. This overpotential depends on catalytic activity and multiphase dynamics, which optimised 3D electrode structures, like metal meshes, gauzes, and expanded sheets, can enhance. We present a scalable, three-step galvanic deposition for fabricating porous NiFeOOH catalysts on 3D nickel substrates. Electrochemical performance is evaluated in near-industrial (1 M KOH, 35 °C) and industrially relevant (30 wt-% KOH, 80 °C) conditions in a three-electrode setup, achieving high stability and activity at current densities up to 1.2 A cm⁻². Tuning the iron content during deposition yields optimal activity with increased iron content under industrial conditions. The catalyst on plain-woven Ni mesh maintains 1.43 V vs. RHE at 500 mA cm⁻² for 100 h. Successful transfer of the deposition method to expanded Ni sheet achieved 1.44 V vs. RHE at 1 A cm⁻², surpassing an industrial benchmark (1.50 V vs. RHE).</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"122 ","pages":"Pages 220-228"},"PeriodicalIF":8.1,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reversible conversion between bicarbonate and formate in solid state “storage ball” for chemical hydrogen storage","authors":"Wenhao Yao,&nbsp;Feng Niu,&nbsp;Zeqi Wu,&nbsp;Siyuan Gao,&nbsp;Yuexiang Huang","doi":"10.1016/j.ijhydene.2025.03.378","DOIUrl":"10.1016/j.ijhydene.2025.03.378","url":null,"abstract":"<div><div>During the renewable energy based “green hydrogen” utilization path, lack of efficient and safe hydrogen storage and transport solution is the predominant hindrance not allowing a wide use of “green hydrogen” to be possible. Here, we firstly reported a solid state “storage ball” assembling by mixing bicarbonate, Pd/C catalyst and water to form a gel-like mixture and then by coating a polypropylene (PP) thin film for hydrogen storage purpose. The single “storage ball” (∼7 mm diameter) containing potassium bicarbonate as the initial reactant yielded 87.3% conversion rate to potassium formate after being charged at 3.0 MPa hydrogen pressure at ambient temperature for 6 h. This process is associated with hydrogen uptake and the calculated hydrogen storage density by weight of the “storage ball” is ∼0.58 wt%, which is about 6 times higher than that of reported aqueous solution system. Impressively, the as-transformed potassium formate inside the “storage ball” can fully be converted back to potassium bicarbonate associated with H₂ release in 15 min at a moderate temperature below 80 °C. The charging/discharging cycling test result of the “storage ball” exhibited no obvious degradation in hydrogen release amount, indicating the high stability and reversibility of the “storage ball” during charging and discharging process. The aluminum cylinder loaded with 100 “storage balls” could continuously and steadily supply hydrogen to a 12 V/35 W fuel cell to drive a LED display. This work provides a new approach for developing cost competent and safe hydrogen storage system for large scale “green hydrogen” storage application.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"122 ","pages":"Pages 229-234"},"PeriodicalIF":8.1,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760023","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":"Deflagration characteristics of hydrogen-ammonia mixed gases under lean conditions","authors":"Jun Wang ,&nbsp;Fangming Cheng ,&nbsp;Zhenmin Luo ,&nbsp;Mingtai Zhou ,&nbsp;Xiaokun Chen","doi":"10.1016/j.ijhydene.2025.03.344","DOIUrl":"10.1016/j.ijhydene.2025.03.344","url":null,"abstract":"<div><div>To investigate the deflagration characteristics of hydrogen-ammonia mixed gases, this study experimentally examines changes in flame propagating characteristics under different hydrogen blending ratios and equivalence ratios and conducts a detailed analysis of the combustion reaction mechanism using CHEMKIN software. The results reveal that flame morphology changes significantly with varying hydrogen blending ratios and equivalence ratios. At a hydrogen blending ratio of 0.2, only a single slope-type flame was observed. As the hydrogen blending ratio increases, the flame evolves into a flat and tulip-type flame, accompanied by oscillations at the flame front. Increasing the hydrogen blending ratio notably accelerates the flame propagation speed. In particular, increasing the hydrogen blending ratio significantly enhanced flame propagation speed, especially at blending ratios of 0.3 and 0.4. Initially, flame propagation speed increased steadily, but larger fluctuations emerged in the later stages. These fluctuations are likely associated with pressure wave reflections and morphological evolution of the flame front. When average flame propagation speed exceeded 1.4 m/s, tulip-shaped flames were observed, indicating a coupling between the complexity of flame propagation behavior and combustion reaction dynamics. Additionally, reactions R1: H + O₂<img>O + OH and R9: H + O₂(+M) = H₂O(+M) have been identified as key elementary reactions controlling the deflagration process of the hydrogen-ammonia mixture. These reactions accelerate combustion by rapidly consuming H radicals and O₂, thereby enhancing the deflagration characteristics. Therefore, this study provides important theoretical support and reference for the safe design and engineering applications of hydrogen-ammonia mixed fuel delivery systems, particularly in lean combustion conditions and pipeline environments, which are of great significance in promoting the safe development of zero-carbon emission fuels in the context of global carbon neutrality goals.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"122 ","pages":"Pages 235-246"},"PeriodicalIF":8.1,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760027","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":"Pyridinic and pyrrolic nitrogen-doped porous carbon improves control of N2 and H2 adsorption thermodynamic for N2/H2 separation","authors":"Bo Liu ,&nbsp;Zhilu Wang ,&nbsp;Lei Zhou ,&nbsp;Tianhao Wang ,&nbsp;Lina Zhang ,&nbsp;Wenxin Ma ,&nbsp;Qiang Fu ,&nbsp;Xia Chen","doi":"10.1016/j.ijhydene.2025.03.328","DOIUrl":"10.1016/j.ijhydene.2025.03.328","url":null,"abstract":"<div><div>Hydrogen, a clean and efficient energy source, faces challenges in enrichment and purification. This study addresses the issue by introducing pyridinic and pyrrolic nitrogen functionalities into phenolic resin-based porous carbon (PC) through melamine pyrolysis, significantly enhancing N₂/H₂ selectivity. The nitrogen-containing groups exhibit a stronger inhibitory effect on hydrogen adsorption than on nitrogen adsorption. Meanwhile, the high specific surface area of the original porous carbon is maintained. At 298 K and 2 bar, the selectivity of N₂ over H₂ reached 14.47 in this work. Density functional theory (DFT) reveals that the inductive effect and direct interaction of edge pyrrolic nitrogen groups contribute to substantial electrostatic effects, with the disparity in adsorption energy being the fundamental reason for enhanced selectivity. This work provides new insights into efficient hydrogen purification, demonstrating the potential of nitrogen-functionalized PCs for N₂/H₂ separation.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"122 ","pages":"Pages 107-116"},"PeriodicalIF":8.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746991","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":"Comparative assessment of future hydrogen demand potentials in a decarbonised European energy system","authors":"Hamza Abid ,&nbsp;Poul Alberg Østegaard ,&nbsp;Iva Ridjan Skov ,&nbsp;Brian Vad Mathiesen","doi":"10.1016/j.ijhydene.2025.03.362","DOIUrl":"10.1016/j.ijhydene.2025.03.362","url":null,"abstract":"<div><div>Hydrogen is poised to play a vital role in Europe's transition to a low-carbon economy while enhancing energy security by reducing reliance on imported fossil fuels. However, future hydrogen demand remains highly uncertain, shaped by sectoral priorities, technology choices, cost dynamics, and policy direction. This study undertakes a comparative assessment of hydrogen demand projections across 20 studies—including academic, governmental, and private sector sources—focused on decarbonizing Europe's energy system by 2050. Both electrolytic and non-electrolytic hydrogen pathways are quantified, with demand estimates varying widely from a median of 50 Mt to a maximum of 108 Mt by 2050. Findings consistently highlight hydrogen's essential role in hard-to-abate sectors in transport and industrial applications, with a growing emphasis on hydrogen-derived fuels like ammonia and methanol. These insights are crucial for informing infrastructure planning and guiding strategic investments to support Europe's long-term climate and energy objectives.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"122 ","pages":"Pages 82-96"},"PeriodicalIF":8.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transition metal-decorated Zr12O12 nanocages as single-atom catalysts for water splitting: A first-principles study","authors":"Sajjad Hussain ,&nbsp;Abdulaziz A. Al-Saadi","doi":"10.1016/j.ijhydene.2025.03.403","DOIUrl":"10.1016/j.ijhydene.2025.03.403","url":null,"abstract":"<div><div>Catalytic water splitting stands out as a highly promising approach to meet the growing global demand in the area of material sustainability. The challenging dissociation of H₂O including adsorption-desorption of hydrogen remains a significant obstacle to improving the catalyst design and performance. In continuation of the effort to identify more effective and agile photocatalysts, Zr₁₂O₁₂ and M@Zr₁₂O₁₂ (M = Ti, V, Cr, or Mn) nanocages have been investigated using Density functional theory (DFT) calculations for their potential in overall catalytic water splitting applications. It has been observed that the M@Zr₁₂O₁₂ nanocages demonstrate high stability, which is crucial in designing single-atom catalysts (SACs) to prevent possible aggregation of the metal. Electronic structure calculations reveal that metal atom loading reduces the bandgap of the Zr₁₂O₁₂ nanocage, thereby increasing the visible light absorption of the catalysts. Additionally, the computed Gibbs free energies indicate that the Mn@Zr₁₂O₁₂ nanocage exhibits a superior performance in hydrogen evolution and oxygen evolution reactions at room temperature among the M@Zr₁₂O₁₂ catalysts explored. However, the oxygen evolution reaction does not proceed on the single metal atom loaded Ti@Zr₁₂O₁₂, V@Zr₁₂O₁₂ and Cr@Zr₁₂O₁₂ catalysts following the Rossmeisl mechanism, suggesting their use for other catalytic applications.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"122 ","pages":"Pages 97-106"},"PeriodicalIF":8.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747020","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":"Investigation of the non-equilibrium heat transfer and self-pressurization behavior of liquid hydrogen tanks","authors":"Hongyu Lv ,&nbsp;Liang Chen ,&nbsp;Zixin Zhang ,&nbsp;Ze Zhang ,&nbsp;Shuangtao Chen ,&nbsp;Yu Hou","doi":"10.1016/j.ijhydene.2025.03.375","DOIUrl":"10.1016/j.ijhydene.2025.03.375","url":null,"abstract":"<div><div>Liquid hydrogen, due to its low boiling point and low latent heat of vaporization, is highly sensitive to external heat leakage, leading to thermodynamic phenomena such as heat and mass transfer, temperature rise, and self-pressurization within the tank. To accurately predict these behaviors in liquid hydrogen tanks, this study developed an evaporation-pressurization prediction model based on a modified three-zone model. The model is validated against classical experimental data, demonstrating high accuracy and applicability across a wide range of operating conditions, with an average maximum relative error of only 2.18 % for the six sets of predicted conditions. This study separates the influencing parameters into dimensionless form based on the gas state equation, compares the variation patterns of key parameters during the pressurization process, and explores the effects of different heat leakages, filling levels, and storage pressures on evaporation behavior. Finally, this study simulates the entire storage pressurization and depressurization process in liquid hydrogen tanks, precisely describing the evolution of various parameters during depressurization and examining the variations in the thermodynamic characteristics within the tank. This paper can enhance the comprehensive understanding and predictive capability of pressurization behavior in liquid hydrogen storage and transportation systems.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"122 ","pages":"Pages 125-138"},"PeriodicalIF":8.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746990","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":"Performance analysis of polymer fuel cell based on carbonous nano-electrocatalyst for clean energy","authors":"Mahdi Soleimani Moghaddam ,&nbsp;Ali Bahari ,&nbsp;Hajar Rajaei Litkohi","doi":"10.1016/j.ijhydene.2025.03.424","DOIUrl":"10.1016/j.ijhydene.2025.03.424","url":null,"abstract":"<div><div>It is vital to develop the oxygen reduction reaction (ORR) in electrocatalysts that promote renewable energy conversion and storage aspirations. The synergistic effect of binary alloys and substrate causes the superior performance of nanocomposite (onset, half-wave potentials, and diffusion current density of 0.020, −0.083 V versus Ag/AgCl and 6 mA cm⁻², respectively) as a catalyst for ORR in basic environments. Data indicates that the modified meso/macro pore structure (nanocomposite) enhances active site accessibility and ion and oxygen mass transport, boosting catalyst ORR performance. Even though micropores provide a vital contribution to sustaining high ORR efficiency by housing the active sites, the importance of meso-macropores in increasing single-cell performance cannot be ignored. The synthesized catalyst demonstrated significantly higher power generation than the benchmark Pt/C in polymer fuel cells. Our breakthrough is that, with a cathode catalyst loading of 2 g m⁻², the FeNi–MoS₂/rGO (denoted as FNM@r) electrocatalyst achieves a peak current density of 5444.3 A m⁻² and a maximum power density of 2290 W m⁻², placing it in the state-of-the-art category for fuel cell applications.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"123 ","pages":"Pages 125-138"},"PeriodicalIF":8.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746910","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}