International Journal of Hydrogen Energy最新文献

{"title":"Tuning the micro- and nano-structure of porous α-Fe2O3 nanosheets for high-efficient hydrogen detection","authors":"Li Yin ,&nbsp;Tengbiao Yu ,&nbsp;Wenpei Shi ,&nbsp;Kang Zhao ,&nbsp;Jinrui Liu ,&nbsp;Qi Qin ,&nbsp;Bin Zhao ,&nbsp;Bingbing Fan ,&nbsp;Deliang Chen ,&nbsp;Rui Zhang","doi":"10.1016/j.ijhydene.2025.151920","DOIUrl":"10.1016/j.ijhydene.2025.151920","url":null,"abstract":"<div><div>Hydrogen(H₂), a clean and sustainable energy carrier of high energy density, is key to the low-carbon energy transition. Due to its colorless, odorless and highly flammable properties, safe and efficient H₂ leakage detection is imperative to prevent explosions. Porous α-Fe₂O₃ nanosheets (NSs) were synthesized via microwave-assisted co-precipitation followed by sintering, using graphene oxide as the template. The resulting α-Fe₂O₃ NSs exhibited a hierarchical structure assembled from sub-level α-Fe₂O₃ nanoparticles at 12–43 nm with a mean diameter of 26 nm. Numerous oxygen vacancy defects were formed on the particle surfaces, endowing the α-Fe₂O₃ NSs with outstanding H₂-sensing performance. At 150 °C, the α-Fe₂O₃ sensor showed ultrahigh sensitivity toward H₂, with response values of 63.7 and 17.9 for 50 ppm and 10 ppm H₂, respectively. Furthermore, the porous α-Fe₂O₃ sensor presented excellent selectivity, maintaining responses below 3 for other tested gases at 100 ppm. Compared with other α-Fe₂O₃-based sensors, the porous α-Fe₂O₃ NSs sensor demonstrates enhanced sensitivity, a lower detection limit, and a reduced optimal working temperature. The ultra-sensitive H₂-sensing property of the α-Fe₂O₃ NSs is attributed to the porous architecture, fine-grained substructures and massive oxygen vacancies. These findings highlight the potential of porous α-Fe₂O₃ NSs for high-performance hydrogen detection applications.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"184 ","pages":"Article 151920"},"PeriodicalIF":8.3,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145236181","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 hydrogen evolution reaction performance of ZnIn2S4-Based single atom catalysts via surface vacancies and interlayer charge transfer","authors":"Wenli Xie ,&nbsp;Bin Cui ,&nbsp;Desheng Liu ,&nbsp;Haicai Huang ,&nbsp;Chuanlu Yang","doi":"10.1016/j.ijhydene.2025.151790","DOIUrl":"10.1016/j.ijhydene.2025.151790","url":null,"abstract":"<div><div>The development of efficient single atom catalysts (SACs) for the hydrogen evolution reaction (HER) is crucial for advancing clean energy technologies. In this study, we investigate the effects of surface vacancies on the HER performance of ZnIn₂S₄ monolayers using first-principles calculations. Our findings show that introducing sulfur vacancies (S_v) and indium vacancies (In_v) triggers interlayer charge transfer, resulting in charge redistribution around metal atoms and modifying the catalytic behavior of ZnIn₂S₄-based SACs. Notably, Pt/ZnIn₂S₄ exhibited outstanding HER activity with a Δ<em>G</em>_H∗ of 0.02 eV, in excellent agreement with experimental reports. Furthermore, Ir/ZnIn₂S₄-Sv and Ir/ZnIn₂S₄-In_v also demonstrated superior catalytic performance with a Δ<em>G</em>_H∗ of 0 eV, indicating their potential as highly effective HER SACs. This study underscores the crucial role of interlayer charge transfer in modulating catalytic activity and offers valuable insights for the design of novel and efficient SACs for sustainable hydrogen production.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"183 ","pages":"Article 151790"},"PeriodicalIF":8.3,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227548","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":"Strain-engineered Z-scheme γ-GeS/BlueP heterostructures for efficient photovoltaic-assisted hydrogen generation","authors":"Yuntao Hu ,&nbsp;Hao Huang ,&nbsp;Guangting Zhao ,&nbsp;Fu Chen ,&nbsp;Xiaojun Zhu ,&nbsp;Ling-Ling Wang ,&nbsp;Yufan Hu ,&nbsp;Quan Li","doi":"10.1016/j.ijhydene.2025.151844","DOIUrl":"10.1016/j.ijhydene.2025.151844","url":null,"abstract":"<div><div>The purposeful design of vertically stacked van der Waals heterostructures with high solar energy conversion efficiency offers a promising route toward carbon neutrality. Our first-principles calculations show that the γ-GeS/BlueP heterojunction is a narrow bandgap semiconductor with high carrier mobilities and strong absorption across the visible region. Modest in-plane strain transforms the heterojunction from type-I to type-II band alignment and enables overall water splitting through a Z-scheme photocatalytic mechanism. At −3 % biaxial strain, the predicted solar-to-hydrogen efficiency (η_STH) reaches 12.21 % and the power conversion efficiency (PCE) reaches 15.08 %. Increasing the compression strain to −4 % raises η_STH to 18.06 % and yields a substantially larger η_STH/PCE ratio than at −3 %. Furthermore, the hydrogen adsorption free energy (ΔG_H∗) for hydrogen evolution reaction (HER) decreases sharply from 1.14 eV at −3 % strain to 0.46 eV at −4 %, indicating markedly enhanced HER activity. Compressive strain also increases hole mobility and strengthens in-plane anisotropy, which facilitates efficient separation and transport of photoexcited electron-hole pairs. These strain-tunable properties highlight γ-GeS/BlueP as a potential bifunctional platform for solar energy conversion, particularly for photovoltaic-assisted hydrogen production.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"182 ","pages":"Article 151844"},"PeriodicalIF":8.3,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219240","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":"Evaluation of site selection for zero carbon salt cavern hydrogen storage based on Fermatean fuzzy set and Regret Theory - TODIM","authors":"Hui Zhao ,&nbsp;Handi Zhang","doi":"10.1016/j.ijhydene.2025.151813","DOIUrl":"10.1016/j.ijhydene.2025.151813","url":null,"abstract":"<div><div>To achieve global energy transformation and net zero carbon emissions, hydrogen energy with abundant green and clean sources has gradually become the research focus. Renewable energy electrolytic water hydrogen production and salt cavern hydrogen storage (SCHS), combined with the “production-storage” integration model of zero carbon emissions throughout the whole process, has undoubtedly become the focus of the energy field. At present, this area of research is in its infancy, and choosing the right SCHS site is crucial to avoid unnecessary losses. However, the existing site selection models (such as AHP and TOPSIS) have limitations when dealing with the fuzzy evaluation information and psychological factors of decision-makers in such complex multi-criteria problems. Based on this, a multi-criteria decision-making method is proposed from five dimensions: geology, economy, society, environment, and risk, considering the fuzziness and uncertainty of evaluation information and the psychological state of decision-makers. Through sensitivity analysis and comparative analysis, the reliability and applicability of the siting model are verified, and 8 salt deposits in eastern China are evaluated. The results showed that (Jintan Salt Deposit) was the best location with a score of 0.2592, while (Zhoutian Salt Deposit) was the least suitable for SCHS with a score of −0.3499. This provides a scientific theoretical basis for the site selection of SCHS.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"182 ","pages":"Article 151813"},"PeriodicalIF":8.3,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219159","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":"2D CFD of lean premixed hydrogen–air flame quenching under locomotive engine conditions","authors":"Patrick C. O'Donnell ,&nbsp;Samuel J. Kazmouz ,&nbsp;Sameera Wijeyakulasuriya ,&nbsp;Adam Klingbeil ,&nbsp;Vijayaselvan Jayakar ,&nbsp;Thomas Lavertu ,&nbsp;Muhsin Ameen","doi":"10.1016/j.ijhydene.2025.151772","DOIUrl":"10.1016/j.ijhydene.2025.151772","url":null,"abstract":"<div><div>Hydrogen (H₂) is a promising fuel for reducing emissions in heavy-duty internal combustion engines (ICEs), but its low quenching distance increases the risk of flame propagation into narrow crevice regions, such as piston-liner gaps. This study uses detailed CFD simulations with finite-rate chemistry to investigate premixed H₂–air flame quenching in a two-dimensional (2D) region consistent with the piston-liner gap of a diesel ICE. Model accuracy was assessed by comparison with experimentally measured quenching distances in an annular stepwise diverging tube (ASDT).</div><div>A parametric study was conducted to assess the influence of crevice width (0.05–1.18 mm), pressure (50–150 bar), unburned gas temperature (431–573 K), and equivalence ratio (<span><math><mrow><mi>ϕ</mi></mrow></math></span> = 0.3–0.6). Results show that the critical Péclet number for flame survival is no greater than 3.25, consistent with prior literature, even under ultra-lean and high-pressure conditions (<span><math><mrow><mi>ϕ</mi></mrow></math></span> ≤ 0.3, <span><math><mrow><mi>p</mi></mrow></math></span> &gt; 50 bar). Additionally, flames with Péclet numbers exceeding 6.15 exhibited front wrinkling, suggesting the onset of velocity-driven instabilities and enhanced flame robustness. These findings help define thresholds for flame quenching in confined geometries and support the safe design of H₂ fueled ICEs.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"182 ","pages":"Article 151772"},"PeriodicalIF":8.3,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219239","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":"Large-Eddy simulation of highly under-expanded hydrogen jets using a low dissipative solver","authors":"Haseeb Ali ,&nbsp;Ville Vuorinen ,&nbsp;Aleksi Rintanen","doi":"10.1016/j.ijhydene.2025.151331","DOIUrl":"10.1016/j.ijhydene.2025.151331","url":null,"abstract":"<div><div>Large-eddy simulation (LES) of H₂ jets is carried out at nozzle pressure ratios 5.8 <span><math><mo>≤</mo></math></span> NPR <span><math><mo>≤</mo></math></span> 10. A low-dissipative, localized flux formulation is proposed and validated using 1D–3D reference cases. In the present under-expanded jet studies, the following numerical observations are made. (1) The proposed low-dissipative approach resolves both shocks and turbulence simultaneously. The transition to turbulence is noted to start up to <span><math><mrow><mo>≈</mo><mn>10</mn><mi>D</mi></mrow></math></span> earlier for under-expanded jets with low-dissipative approach in comparison to the fully dissipative flux approach. (2) A comparison of H₂, CH₄, and N₂ jets indicates a delayed transition to turbulence for H₂ at NPR = 6.5. (3) At all NPRs, the H₂ jet turbulence transition is delayed, but the transition shifts towards the nozzle when the NPR increases. (4) The normalized peak vorticity <span><math><mrow><mo>(</mo><msub><mrow><mi>ω</mi></mrow><mrow><mi>z</mi></mrow></msub><mi>D</mi><mo>/</mo><msub><mrow><mi>U</mi></mrow><mrow><mn>1</mn></mrow></msub><mo>)</mo></mrow></math></span> values for Görtler vortices around the barrel shock boundary of H₂ jet is observed to be <span><math><mrow><mo>≈</mo><mn>4</mn></mrow></math></span> times lower compared to representative CH₄ and N₂ jets. (5) For H₂, Mach disk oscillation is observed and linked to the global POD modes at a Strouhal number range of <span><math><mrow><mi>S</mi><mi>t</mi><mo>≈</mo><mn>0</mn><mo>.</mo><mn>063</mn><mo>−</mo><mn>0</mn><mo>.</mo><mn>078</mn></mrow></math></span>.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"182 ","pages":"Article 151331"},"PeriodicalIF":8.3,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219152","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":"Electron buffer effect in Cr–Pt3Ni catalysts for robust oxygen reduction electrocatalysis","authors":"Xiaoxue Mou ,&nbsp;Ziyu Zhang ,&nbsp;Zigang Zhao ,&nbsp;Bo Liu ,&nbsp;Xin Wang ,&nbsp;Chen Yang ,&nbsp;Lixiao Shen ,&nbsp;Yunlong Zhang ,&nbsp;Lei Zhao ,&nbsp;Weili Qu ,&nbsp;Zhenbo Wang","doi":"10.1016/j.ijhydene.2025.151698","DOIUrl":"10.1016/j.ijhydene.2025.151698","url":null,"abstract":"<div><div>Bimetallic platinum-nickel alloy nanostructures (PtNi/C) have garnered significant attention due to their potential to catalyze the oxygen reduction reaction (ORR), yet their practical applications are hindered by challenges in catalytic activity and durability. Here, we present a strategy that entails introducing the electron buffer Cr into Pt₃Ni alloy nanoparticle catalysts with the aim of lessening the surface polarization of Pt shells. The as-prepared Cr–Pt₃Ni/C catalyst demonstrates strong interatomic interactions, thereby augmenting both the catalytic activity and durability of fuel cells. The Cr–Pt₃Ni/C catalyst exhibits remarkable ORR performance, attaining a half-wave potential (E_1/2) of 0.934 V, which is 37 mV greater than Pt/C (0.897 V). After 30,000 ADT cycles, Cr–Pt₃Ni/C exhibits negligible loss in E_1/2, with the ECSA and MA retained as high as 99.2 % and 92.7 % of their initial values, respectively. Furthermore, the PEMFC tests revealed outstanding performance with peak power densities of 2.90 W cm⁻²@H₂–O₂ and 1.85 W cm⁻²@H₂-air under low Pt loadings, underscoring the potential of Cr–Pt₃Ni/C for practical fuel cell applications. DFT computations signify that the ORR activity is enhanced by the introduction of Cr into Pt₃Ni/C to optimize the surface strain, and the enhancement of durability is attributable to Cr's contribution to charge transfer in the Pt shell and the increase of the dissolution energy barrier of Ni.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"182 ","pages":"Article 151698"},"PeriodicalIF":8.3,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219153","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 Ni–Ru/CF electrode fabrication and wettability modification on hydrogen evolution reaction and bubble evolution behavior during water electrolysis","authors":"Yao Yao,&nbsp;Xiajing Chen,&nbsp;Mengyun Shi,&nbsp;Yu Qiu,&nbsp;Dongling Wu,&nbsp;Hongjie Yan,&nbsp;Liu Liu","doi":"10.1016/j.ijhydene.2025.151758","DOIUrl":"10.1016/j.ijhydene.2025.151758","url":null,"abstract":"&lt;div&gt;&lt;div&gt;Alkaline water electrolysis has attracted extensive attention, but its low energy conversion efficiency remains one of the key challenges hindering its industrialization. In this study, Ni–Ru/CF catalyst electrodes were fabricated via electrodeposition, with key parameters including &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;Ru&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;mo&gt;+&lt;/mo&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt; concentration in the deposition solution, deposition potential, and deposition time systematically optimized. The surface wettability of the electrodes was regulated by polytetrafluoroethylene (PTFE) solution impregnation, and the correlation mechanism between bubble evolution behavior and hydrogen evolution reaction (HER) efficiency on electrodes with different wettabilities was analyzed by combining high-speed imaging technology. Results show that the Ni–Ru/CF electrode fabricated under optimized deposition conditions (&lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;Ru&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;mo&gt;+&lt;/mo&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt; concentration of 0.02 M, deposition potential of &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;.&lt;/mo&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; V, and deposition time of 180 s) exhibits excellent HER performance, which is an overpotential of &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;39&lt;/mn&gt;&lt;mo&gt;.&lt;/mo&gt;&lt;mn&gt;75&lt;/mn&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; mV at a current density of &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;10&lt;/mn&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;mtext&gt;mA&lt;/mtext&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mtext&gt;cm&lt;/mtext&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, a Tafel slope of 44.16 mV/dec, an electrochemical active surface area (ECSA) of 790 &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mtext&gt;cm&lt;/mtext&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mtext&gt;cm&lt;/mtext&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, and a charge transfer resistance (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;ct&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;) of 2.19 &lt;span&gt;&lt;math&gt;&lt;mi&gt;Ω&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt;. The hierarchical structure of nanoparticles and nanoflowers significantly enhances the exposure of active sites, providing structural support for efficient HER. PTFE modification reveals the key influence of wettability on bubble behavior. As the PTFE concentration increases (0-0.25 wt%), the electrode hydrophobicity is enhanced, and the PTFE film leads to a decrease in ECSA and an increase in overpotential. High-speed imaging results indicate that bubbles on hydrophilic electrodes (without PTFE modification) are prone to detachment, with all bubble diameters less than 0.29 mm at a current density of &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;50&lt;/mn&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;mtext&gt;mA&lt;/mtext&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mtext&gt;cm&lt;/mtext&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;. In contrast, the bubble diameter on hydrophobic electrodes (treated with PTFE) increases significantly. For the 0.25 wt% PTFE-modified electrode, the maximum bubble diameter reaches 2.65 mm at a current density ","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"182 ","pages":"Article 151758"},"PeriodicalIF":8.3,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218994","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 hydrogen storage performance of reactors with different lattice structures manufactured by additive manufacturing method","authors":"Gamze Atalmis Sari ,&nbsp;Ruveyda N. Kaplan ,&nbsp;Furkan Diler ,&nbsp;Remzi Ecmel Ece ,&nbsp;Serkan Toros ,&nbsp;Yuksel Kaplan","doi":"10.1016/j.ijhydene.2025.151684","DOIUrl":"10.1016/j.ijhydene.2025.151684","url":null,"abstract":"<div><div>The development of an aluminum metal hydride reactor using additive manufacturing offers a significant innovation in hydrogen storage systems. In this study, reactors with 3 different geometries (Body Centered, Bipyramid, Face Centered Lattice) were produced separately from AlSi10Mg and Ti6Al4V materials with complex geometries by additive manufacturing method and their hydrogen charge/discharge performances were tested in laboratory environment. By using lattice structures in the reactor, heat transfer was improved and hydrogen filling times were shortened. The best result in terms of uniform temperature change and hydrogen storage mass in the reactor produced by additive manufacturing method was given by Bipyramid geometry produced from Ti6Al4V composite material. Measurement of stored hydrogen masses was carried out on a precision balance depending on time. 0.70 gr hydrogen was stored in the reactor.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"182 ","pages":"Article 151684"},"PeriodicalIF":8.3,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219160","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":"Direct determination of the H2 absorption/desorption mechanism in Pd nanoparticles","authors":"Cynthia Cibaka-Ndaya ,&nbsp;Nicolas Javahiraly ,&nbsp;Jacques Jose ,&nbsp;Lucian Roiban ,&nbsp;Thierry Epicier ,&nbsp;Arnaud Brioude","doi":"10.1016/j.ijhydene.2025.151766","DOIUrl":"10.1016/j.ijhydene.2025.151766","url":null,"abstract":"<div><div>Palladium, well known for its high affinity with hydrogen, is a promising material for hydrogen storage or sensing applications. To develop such technologies, it is necessary to understand the interactions between palladium and hydrogen. Here, these interactions are studied at the nanoscale from thermodynamic and structural perspectives. In particular, with the aim of acquiring accurate and reliable data, this work shows the development of a new experimental method that allows direct assessment of the effective amount of hydrogen in Pd NPs during sorption processes, in contrast to most reported works that instead probe a parameter that is supposedly proportional to the composition. A custom gas chromatography apparatus was employed, making the proposed approach readily accessible in most materials research facilities. Furthermore, structural investigations by in operando electron energy loss spectroscopy revealed, for the first time, intermediate phases in the metallic to hydride (and reverse) transformations, challenging previously reported sharp phase transitions, thus suggesting a new understanding of the interaction mechanisms between Pd and H₂ at the nanoscale. The results of this work advance the knowledge on palladium – hydrogen systems which can significantly contribute to the development of alternative energy sources.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"182 ","pages":"Article 151766"},"PeriodicalIF":8.3,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219163","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}