International Journal of Hydrogen Energy最新文献

{"title":"Polarization loss decomposition-based online health state estimation for proton exchange membrane fuel cells","authors":"Xuan Meng ,&nbsp;Mengjie Liu ,&nbsp;Jian Mei ,&nbsp;Xiang Li ,&nbsp;Sergey Grigoriev ,&nbsp;Hany M. Hasanien ,&nbsp;Xingwang Tang ,&nbsp;Rui Li ,&nbsp;Chuanyu Sun","doi":"10.1016/j.ijhydene.2025.150162","DOIUrl":"10.1016/j.ijhydene.2025.150162","url":null,"abstract":"<div><div>This paper systematically investigates the steady-state polarization losses and health assessment of proton exchange membrane fuel cells. Activation and ohmic losses are quantitatively decoupled using Tafel analysis and high-frequency resistance measurements. Under conventional stoichiometry, activation-free polarization curves show high linearity (Pearson coefficient <span><math><mo>&lt;</mo></math></span> −0.99), which may lead to overestimation of ohmic resistance and underestimation of concentration loss if fitted directly. To address this, a simplified voltage model incorporating equivalent resistance for ohmic and concentration losses is proposed. Based on this model, an online health state estimation method using open-circuit voltage transients is developed to estimate electrochemical surface area and resistance in real time. Experimental results confirm the accuracy of our model, with prediction errors below 1% over the full test cycle. Furthermore, a virtual rated voltage metric is introduced to capture performance degradation trends. This framework provides a practical solution for PEMFC performance evaluation, health monitoring, and life prediction.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"157 ","pages":"Article 150162"},"PeriodicalIF":8.1,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144631961","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":"Operando investigation of the two-phase flow behavior of a zero-gap alkaline electrolysis cell using neutron radiography","authors":"Stefanie Renz ,&nbsp;Tobias Arlt ,&nbsp;Nikolay Kardjilov ,&nbsp;Lukas Helfen ,&nbsp;Cyrille Couture ,&nbsp;Alessandro Tengattini ,&nbsp;Felix Lohmann-Richters ,&nbsp;Eugen Hoppe ,&nbsp;Ingo Manke ,&nbsp;Werner Lehnert ,&nbsp;Andreas Jupke","doi":"10.1016/j.ijhydene.2025.150321","DOIUrl":"10.1016/j.ijhydene.2025.150321","url":null,"abstract":"<div><div>The two-phase flow behavior inside a zero-gap alkaline electrolysis cell is investigated using operando neutron radiography. The cell was operated with a highly concentrated potassium hydroxide solution. The two-phase flow is evaluated at different electrolyte volume flows, current densities, and temperatures. The amount of gas inside the parallel flow channels is identified and the gas bubble velocity over the channel’s length and time is evaluated depending on the different operating conditions. The gas bubble motion requires a high degree of temporal resolution. At the Institut Laue Langevin, a high frame rate of 50 fps was achieved using the NeXT (Neutron and X-Ray Tomograph) neutron imaging instrument, which is fed by the world’s most powerful neutron source. This study demonstrates the importance and limitations of high temporal and spatial resolution in neutron radiography for the investigation of two-phase flow in electrochemical flow cells.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"157 ","pages":"Article 150321"},"PeriodicalIF":8.1,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144632256","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":"Stabilizing and accelerating the hydrogen evolution reaction of well-designed Pt nanoparticle with single atomic iron sites","authors":"Boyuan Duan ,&nbsp;Qing Ren ,&nbsp;Chengcheng Yan ,&nbsp;Yongmin Nie ,&nbsp;Ming Pei Yang ,&nbsp;Qihao Qin ,&nbsp;Shengming Xu ,&nbsp;Caihua Su ,&nbsp;Chunxia Wang ,&nbsp;Guoyong Huang","doi":"10.1016/j.ijhydene.2025.150315","DOIUrl":"10.1016/j.ijhydene.2025.150315","url":null,"abstract":"<div><div>To solve the stability of Pt nanoparticles in Pt-based electrocatalysts, herein we demonstrate an electrocatalyst (Pt/FeSA-NC) featuring with Pt nanoparticles deposited on Fe single-atom nitrogen-doped carbon, which was realized by the pyrolysis and subsequent wet chemical reduction approach. The as resultant Fe single-atom nitrogen-doped carbon exhibits delicate dodecahedral structure with uniformly distribution of Pt nanoparticles which provide suitable surrounding environment for Pt nanoparticles and enable the intense interaction between atomic Fe and Pt. Electrochemical results shows a superior activity with overpotentials reaching up to 19 mV and 189 mV, respectively at current densities of 10 and 100 mA cm⁻², outperforming commercial Pt/C (27 mV and 229 mV) in alkaline conditions. DFT calculations revealed a nearly thermal neutral ΔG_H∗ value of −0.360 eV of Pt/FeSA-NC, therefore, reducing the energy barrier and ensuring an accelerated reaction thermodynamics. This research offers a new approach to resolve the stability challenges of Pt-based electrocatalysts and advances the advancement of highly efficient electrocatalysts.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"157 ","pages":"Article 150315"},"PeriodicalIF":8.1,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144632262","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":"Unveiling the role of doping and intrinsic vacancies in BiVO4 for enhanced photoelectrochemical water splitting: a first-principles study","authors":"Otmane El Ouardi ,&nbsp;Hamza Ladib ,&nbsp;Brigitte Vigolo ,&nbsp;Jones Alami ,&nbsp;Mohammed Makha","doi":"10.1016/j.ijhydene.2025.150384","DOIUrl":"10.1016/j.ijhydene.2025.150384","url":null,"abstract":"<div><div>Monoclinic n-type bismuth vanadate (BiVO₄) is a leading photoanode material for photoelectrochemical water splitting, owing to its favorable band alignment with water redox potentials, high charge extraction efficiency, and ease of synthesis. However, its photoelectrochemical performance is hindered by a relatively wide band gap, low electronic conductivity, high recombination rates, and sluggish water oxidation kinetics. In this study, we use density functional theory to investigate the impact of non-metal doping, using nitrogen as a model, and intrinsic vacancies (Bi, V, O) on the photocatalytic properties of BiVO₄. Nitrogen doping reduces the band gap by ∼0.3 eV, increases charge carrier concentration, and improves mobility, leading to enhanced electron-hole separation. Among intrinsic defects, oxygen vacancies have the most significant effect on charge transport, while bismuth vacancies strongly influence light absorption. A charge-balanced N-doped BiVO₄ structure effectively combines reduced recombination with improved light harvesting. Our results highlight that the main contributions of doping and vacancies lie in enhancing light absorption and charge separation, rather than injection efficiency. These findings provide valuable guidance for the rational design of advanced BiVO₄-based photoanodes for efficient photoelectrochemical water splitting.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"157 ","pages":"Article 150384"},"PeriodicalIF":8.1,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144632258","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":"Continuous hydrogen production from sunrise to sunset: Advancing photocatalytic stability via interface-engineered nanocomposite tris-s-triazine g-C3N4/ZnIn2S4 heterostructure","authors":"Nagaveni Munnelli ,&nbsp;Bharagav Urupalli ,&nbsp;Navakoteswara Rao Vempuluru ,&nbsp;Lakshmana Reddy Nagappagari ,&nbsp;Ramya Parthasarathy ,&nbsp;Cheralathan Kanakkampalayam Krishnan ,&nbsp;Anil Kumar Reddy Police ,&nbsp;Mamatha Kumari Murikinati ,&nbsp;Rengaraj Selvaraj ,&nbsp;Sungjun Bae ,&nbsp;Shankar Muthukonda Venkatakrishnan","doi":"10.1016/j.ijhydene.2025.150376","DOIUrl":"10.1016/j.ijhydene.2025.150376","url":null,"abstract":"<div><div>A tris-<em>s</em>-triazine g-C₃N₄/ZnIn₂S₄ heterojunction photocatalyst achieved continuous H₂ generation from sunrise to sunset for the first time, based on batch and day-long experiments at different sunlight intensities. Under a clear sky, H₂ production increased steadily from 6 a.m. to 1 p.m., peaking at 13.6 mmol h⁻¹·g⁻¹_cat at 1 p.m. before declining in the afternoon. Under a cloudy sky the H₂ production was slower, reaching a peak rate of 3.1 mmol h⁻¹·g⁻¹_cat at 1 p.m., highlighting the influence of light intensity and spectral composition on the solar-to-hydrogen conversion efficiency. H₂ production rates in different time slots follow the order of 12–3 p.m. &gt; 9–12 a.m. &gt; 3–6 p.m. &gt; 6–9 a.m. under both sky conditions. This nanohybrid photocatalyst showed enhanced visible light absorption (400–500 nm) and a peak H₂ generation rate of 10.9 mmol h⁻¹·g⁻¹_cat during peak solar hours (10:30 a.m. to 2:30 p.m.). It also maintained consistent H₂ production across multiple photoreactors and over five consecutive days, indicating its potential for industrial scale-up. The formation of heterojunction was confirmed using X-ray diffraction and transmission electron microscopy, whereas photoluminescence, photocurrent density, and electrochemical impedance spectroscopy results demonstrated effective charge carrier separation. Diffuse reflectance ultraviolet–visible spectroscopy, X-ray photoelectron spectroscopy, Mott–Schottky and electron paramagnetic resonance spectroscopy analyses confirmed that the S-scheme junction makes electrons and holes from higher energy potential available for redox reactions and at the same time facilitates recombination of electrons and holes of lower energy potential; combinedly these processes facilitate separation of charge carriers and improve H₂ production. This study provides valuable insights into the electron transfer dynamics, influence of the visible band of solar spectrum, and light intensity on sustainable H₂ production.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"157 ","pages":"Article 150376"},"PeriodicalIF":8.1,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144632259","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":"Synthesis of Ru/Co3O4 nanosheets as a multifunctional electrocatalyst for boosting urea-assisted water electrolysis","authors":"Xiaomei Xu,&nbsp;Sujin Jeon,&nbsp;Taekyung Yu","doi":"10.1016/j.ijhydene.2025.150472","DOIUrl":"10.1016/j.ijhydene.2025.150472","url":null,"abstract":"<div><div>The urea oxidation reaction offers a promising alternative to the oxygen evolution reaction in urea-assisted water electrolysis for hydrogen production. Herein, Ru/Co₃O₄ nanoparticles (NPs) with excellent urea-assisted water electrolysis performance were prepared via an antisolvent crystallization-based method. The strong interaction between Co₃O₄ and Ru resulted in enhanced synergistic effects, leading to an increased number of active sites, adjusted electronic structure, enhanced reaction kinetics, and more structural defects, thus enhancing both the catalytic activity and stability. The Ru/Co₃O₄/C catalyst delivers outstanding multifunctional activity with low overpotentials of 238 mV for oxygen evolution reaction (OER), 46 mV for hydrogen evolution reaction (HER), and enables urea oxidation reaction (UOR) at 1.45 V to reach 10 mA cm<strong>⁻²</strong>. Impressively, an ultralow voltage of 1.47 V was required for Ru/Co₃O₄||Ru/Co₃O₄ to deliver a current density of 10 mA cm<strong>⁻²</strong> in urea-assisted water electrolysis, which was 190 mV lower than that of the commercial RuO₂||Pt/C couple, with superior stability. Comprehensive characterization techniques analyses reveal that Ru/Co₃O₄/C exhibits excellent structural stability, reversible surface redox behavior, and superior charge transfer kinetics, particularly for the UOR. This work provides a novel strategy for urea-assisted water electrolysis toward energy-saving H₂ production.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"157 ","pages":"Article 150472"},"PeriodicalIF":8.1,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144632260","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 methanation of adsorbed CO over Ni/CeO2 catalyst using H2 release from vanadium powder as H2-storage material","authors":"Kazumasa Oshima,&nbsp;Jun Okuda,&nbsp;Masahiro Kishida","doi":"10.1016/j.ijhydene.2025.150469","DOIUrl":"10.1016/j.ijhydene.2025.150469","url":null,"abstract":"<div><div>This study examines the feasibility of using a physical mixture of Ni/CeO₂ catalyst and vanadium (V) powder (as an H₂-storage material) for methanation of dilute CO. The system principle involves CO adsorption onto the Ni/CeO₂ catalyst and H₂ storage in V powder at a low temperature (∼50 °C). Subsequently, temperature increase of the physical mixture under an inert gas flow triggers H₂ release from the V powder, enabling <em>in-situ</em> methanation of the adsorbed CO on the Ni/CeO₂ catalyst. An optimized Ni/CeO₂:V weight ratio of 1:1 results in a high conversion (76 %) of the initially adsorbed CO, yielding 0.29 μmol of CH₄. The system demonstrates feasibility of processing a dilute feed stream, producing CH₄ even when only 1 % CO is used during adsorption. However, cyclic testing reveals significant durability issues. The performance degradation is attributed to two factors that diminish the H₂-release capacity of V powder: (i) surface oxidation by product water and (ii) detrimental V-O-Ce interfacial interactions during thermal cycling. Despite these limitations, this study demonstrates the potential of coupling catalytic reactions with H₂-storage materials for the effective utilization of dilute gas streams.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"157 ","pages":"Article 150469"},"PeriodicalIF":8.1,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144632264","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":"Tunable dry reforming of methane in a non-catalytic nanosecond-pulsed plasma reactor","authors":"Fabio Cameli ,&nbsp;Kevin M. Van Geem ,&nbsp;Georgios D. Stefanidis","doi":"10.1016/j.ijhydene.2025.150293","DOIUrl":"10.1016/j.ijhydene.2025.150293","url":null,"abstract":"<div><div>Nanosecond-pulsed-discharge (NPD) plasma can effectively promote dry reforming of methane (DRM) to convert feedstock mixtures of methane (CH₄) and carbon dioxide (CO₂), typical of biogas streams, into syngas and C₂ species through sharp energy pulses that can be regulated in amplitude and frequency to optimize energy delivery. Both continuous pulsing and grouped pulses (bursts) drive reactants' conversion by controlling the dissipated power in the discharge. The syngas composition at the outlet can be linearly tuned via the feed gas ratio, as CH₄ coupling reactions and CO₂ dissociation complement the DRM reaction, maintaining the correlation. CH₄ and CO₂ conversions follow a saturation trend with specific energy input (SEI), with maximum values of 83 % and 75 %, respectively. Nonetheless, the energy conversion efficiency (ECE) shows a non-monotonic trend with SEI, likely due to memory effects at high pulse frequencies, which promote gas breakdown at low energy. The latter conditions promote 47 % conversion of discharge energy into chemical energy, whereas higher reactants’ conversions are attained at a lower efficiency (i.e., 27 %). The NPD plasma DRM process produces H₂ with negative CO₂ emissions when powered by wind and solar energy (i.e., −9 kg_CO2 kg_H2⁻¹ and −7 kg_CO2 kg_H2⁻¹, respectively), in contrast to the state-of-the-art steam methane reforming, which emits about 10 kg_CO2 kg_H2⁻¹.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"155 ","pages":"Article 150293"},"PeriodicalIF":8.1,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144632359","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":"Corrigendum to “Hydrogen storage in depleted gas reservoirs with carbon dioxide as a cushion gas: Exploring a lateral gas separation strategy to reduce gas mixing” [Int J Hydrogen Energy 102 (2025) 1116-1129]","authors":"Harri A. Williams ,&nbsp;Niklas Heinemann ,&nbsp;Ian L. Molnar ,&nbsp;Fernanda de Mesquita L Veloso ,&nbsp;Toni Gladding ,&nbsp;Tarek L. Rashwan","doi":"10.1016/j.ijhydene.2025.150445","DOIUrl":"10.1016/j.ijhydene.2025.150445","url":null,"abstract":"","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"157 ","pages":"Article 150445"},"PeriodicalIF":8.1,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144631962","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":"Ultra-high efficiency hydrogen production using a large-scale solid oxide electrolysis cell system","authors":"Micah Casteel ,&nbsp;Tyler L. Westover ,&nbsp;Amey Shigrekar ,&nbsp;Temitayo Olowu ,&nbsp;Andy Ta ,&nbsp;Alejandro Lavernia ,&nbsp;Ali Zargari ,&nbsp;Brent Cheldelin","doi":"10.1016/j.ijhydene.2025.150283","DOIUrl":"10.1016/j.ijhydene.2025.150283","url":null,"abstract":"<div><div>Efficient and cost-effective production of clean hydrogen is key to decarbonizing the production of hard-to-abate industries, such as chemicals, fuels, steel, cement and many other commodities that form the basis of modern societies. High-temperature steam electrolysis (HTSE) has recently become commercially available and offers opportunities for producing hydrogen at higher efficiency and lower cost than competing low temperature technologies. In this work, we report world record setting hydrogen production efficiency from large-scale prototype HTSE systems based on solid oxide electrolysis cell (SOEC) technology. Independent tests performed at Idaho National Laboratory (INL) employed a Bloom Energy 100 kW SOEC system to achieve a hydrogen production direct current specific electric energy consumption as low as 36.7 kWh per kilogram of hydrogen. Remarkably, similar high efficiencies in the range of 36–39 kW/kg-H₂ were obtained over a wide range of hydrogen production rates and even during dynamic ramping as the hydrogen production and electric power consumption of the system were varied between 20 % and 100 % of nominal conditions. These test results validate previous projections that commercial SOEC systems can produce clean hydrogen at efficiencies approaching 100 % for less than 2 U S. dollars per kilogram when located near sources of inexpensive, low-grade heat and clean electricity.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"157 ","pages":"Article 150283"},"PeriodicalIF":8.1,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144632255","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}