International Journal of Hydrogen Energy最新文献

{"title":"Strong electron-coupled integrated WS2/ZnCdS nanoparticles for enhanced photocatalytic hydrogen evolution","authors":"Haiyan Yang ,&nbsp;Wenjie Guo ,&nbsp;Zhenyi Xu ,&nbsp;Houxiang Sun ,&nbsp;Furong Li ,&nbsp;Ni Liao ,&nbsp;Huabing Zhang ,&nbsp;Yeonggil Kim ,&nbsp;Zhiqiang Jiang","doi":"10.1016/j.ijhydene.2025.150318","DOIUrl":"10.1016/j.ijhydene.2025.150318","url":null,"abstract":"<div><div>The development of efficient hydrogen production catalysts, by implementing co-catalyst loading strategies and thus regulating photogenerated electron-transfer pathways represents a promising approach to advance the development of hydrogen energy. A simple hydrothermal method is used to integrate WS₂, which exhibits a strong electron coupling effect, as a co-catalyst with ZnCdS nanoparticles, obtaining WS₂/ZnCdS nanoparticles that exhibit excellent photocatalytic activity in hydrogen evolution. The internal electric field established between WS₂ and ZnCdS, along with the second-order electron-transfer pathways, facilitates the transfer of photogenerated electrons. Moreover, the inherent strong electron coupling effect in WS₂ promotes the accelerated separation of e⁻−h⁺ pairs, owing to which the H₂ evolution rate of the WS₂/ZnCdS nanoparticles reaches 5.30 mmol g⁻¹·h⁻¹, which is 22.1 and 2.55 times higher than those of CdS and ZnCdS nanoparticles, respectively. Furthermore, electron paramagnetic resonance and transient photocurrent spectroscopic investigations confirm that the increased H₂ yield could also be attributed to increase in both the number of active sites and photogenerated electrons within the WS₂/ZnCdS nanoparticles. This study provides valuable insights on WS₂ as a co-catalyst for efficient photocatalytic hydrogen production.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"160 ","pages":"Article 150318"},"PeriodicalIF":8.3,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144721493","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":"Ru-modified NiFe2O4/NiO heterojunction for high-performance alkaline hydrogen evolution","authors":"Fu Chen ,&nbsp;Zhihan Huang ,&nbsp;Muhammad Humayun ,&nbsp;Yuxiao Liu ,&nbsp;Kai Zhao ,&nbsp;Linchao Yao ,&nbsp;Mohamed Bououdina ,&nbsp;Sadegh Rostamnia ,&nbsp;Xinying Xue ,&nbsp;Huaming Zhang ,&nbsp;Chundong Wang","doi":"10.1016/j.ijhydene.2025.150590","DOIUrl":"10.1016/j.ijhydene.2025.150590","url":null,"abstract":"<div><div>Precious metals like Pt, Ir, and Ru are highly efficient catalysts for the hydrogen evolution reaction (HER) in acidic environments; however, their efficiency significantly decreases in alkaline environments due to the slow kinetics of water dissociation. Doping and interface engineering have emerged as effective ways to improve water-splitting performance. This study introduces a novel Ru-doped flower-like heterostructure catalyst (Ru-NiFe₂O₄/NiO) vertically grown on nickel foam (NF) via a simple hydrothermal method followed by annealing. The improved catalyst derives advantages from electronic structure modulation, a hierarchical nanosheet architecture rich in active sites, and tailored hydrogen adsorption characteristics. As a result, Ru-NiFe₂O₄/NiO demonstrates remarkable HER activity, exhibiting overpotentials of merely 17 mV and 78 mV at current densities of 10 and 100 mA cm⁻², respectively, alongside a low Tafel slope of 37.98 mV dec⁻¹, surpassing that of commercial 20 % Pt/C. An assembled alkaline electrolyzer utilizing Ru-NiFe₂O₄/NiO‖NiFe achieves a cell voltage of 1.513 V and maintains stable operation for over 30 h at a current density of 10 mA cm⁻², surpassing the RuO₂‖Pt/C benchmark (1.62 V). This study presents an effective approach for the development of efficient HER catalysts through heterostructure engineering and noble metal doping.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"161 ","pages":"Article 150590"},"PeriodicalIF":8.3,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722797","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":"Techno-economic optimization of green hydrogen production from curtailed power in Ireland: Impact of future renewable energy installations, weather variability, and grid constraints","authors":"Charlene Vance ,&nbsp;Aina Maimó Far ,&nbsp;Conor Sweeney ,&nbsp;Eoin Syron","doi":"10.1016/j.ijhydene.2025.150675","DOIUrl":"10.1016/j.ijhydene.2025.150675","url":null,"abstract":"<div><div>To improve the economic viability of renewable (green) hydrogen production, excess renewable energy which cannot be input to the electricity grid (curtailed power) can be utilized. While several models have attempted to optimize hydrogen production using curtailed power, several factors must be considered in greater detail, including the impacts of future renewable energy capacity, weather variability, and electricity grid constraints. This study aims to explore these aspects through an integrated model performing a techno-economic assessment and size optimization in order to achieve the minimum levelized cost of hydrogen (LCOH). Based on the Irish case, optimizing the production of hydrogen from curtailed power results in a minimum LCOH of 1.20–9.39 €/kg. To maximize variable renewable energy penetration in the grid while allowing for low-cost hydrogen production from curtailed power, it is suggested to focus on grid improvements while ensuring rapid commissioning of offshore wind installations, leading to a LCOH of 1.26–2.44 €/kg.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"161 ","pages":"Article 150675"},"PeriodicalIF":8.3,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722796","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":"Data-driven consensus protocol for regulating multi-stack PEMFC systems","authors":"Salah Eddine Halledj ,&nbsp;Amar Bouafassa ,&nbsp;Roberto Faranda ,&nbsp;Luis M. Fernández-Ramírez","doi":"10.1016/j.ijhydene.2025.150609","DOIUrl":"10.1016/j.ijhydene.2025.150609","url":null,"abstract":"<div><div>This study proposes a novel data-driven consensus protocol for regulating the required oxygen excess ratio (OER) of multi-stack Proton Exchange Membrane Fuel Cell (PEMFC) systems, without requiring real-time state access or prior knowledge of the system dynamics. The control scheme incorporates a distributed state observer that predicts the states of each fuel cell by leveraging relative information from neighboring fuel cells. A consensus algorithm is then employed to enable each follower fuel cell to track the OER signal of the leader system. To optimize the consensus feedback gain, a direct data-driven optimal controller is designed, relying solely on leader system data. Furthermore, sufficient conditions for stability are derived from Lyapunov theorem and data-dependent linear matrix inequalities solutions. The effectiveness of the proposed approach, along with the theoretical findings, are validated through numerical simulations, demonstrating robust performance under load variation and network uncertainties, including Deniel of Service and False Data injection attacks, with accurate tracking of the leader's outputs across all PEMFC stacks.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"160 ","pages":"Article 150609"},"PeriodicalIF":8.1,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713619","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":"Research on modulating catalyst layer microstructure through the construction of pre-coated catalysts","authors":"Yu Chen,&nbsp;Daozeng Yang,&nbsp;Jialun Kang,&nbsp;Bing Li,&nbsp;Daijun Yang,&nbsp;Pingwen Ming,&nbsp;Cunman Zhang","doi":"10.1016/j.ijhydene.2025.150679","DOIUrl":"10.1016/j.ijhydene.2025.150679","url":null,"abstract":"<div><div>The ink preparation of the catalyst layer (CL) has a significant impact on proton exchange membrane fuel cells by determining the adsorption state of ink aggregates and pore structure in the CL. This paper introduced a novel type of pre-coated catalyst, where catalysts are pre-coated by ionomers with I/C ratios ranging from 0.1 to 0.5, and investigated the effects of particles on the ink properties, CL pore structure, and cell performance by adjusting its formulation. Infrared testing demonstrated the coating effect of the ionomer on the catalyst, while rheological results revealed enhanced dispersion and three-dimensional network stability at low I/C ratios. Subsequent SEM images confirmed that both the crack quantity and width of CLs increased with the I/C ratio. Additionally, pore parameter analysis revealed that the introduction of pre-coated catalyst allows for the regulation of mesopore volume. At high current densities, the electrochemical performance of the CLs showed an improvement with the increase of I/C ratio, achieving a maximum power density of 801.9 mW cm⁻². This work also provides a new approach for adjusting the pore volume of CLs and optimizing the mass transfer process.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"160 ","pages":"Article 150679"},"PeriodicalIF":8.1,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713620","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":"Construction of Ru/NiMoOx@NC with multi-interfacial core-shell structures for urea-assisted hydrogen production","authors":"Jingwen Ma,&nbsp;Ruiting Wang,&nbsp;Tianai Zhang,&nbsp;Ying Tian,&nbsp;Jinhao Liu,&nbsp;Junbin Li","doi":"10.1016/j.ijhydene.2025.150686","DOIUrl":"10.1016/j.ijhydene.2025.150686","url":null,"abstract":"<div><div>Urea-assisted hydrogen production is an emerging hydrogen production technology that offers a new approach to the efficient and clean production of hydrogen energy. The low energy consumption urea oxidation reaction replaces the high energy consumption oxygen evolution reaction (OER), significantly reducing the energy consumption of hydrogen production and achieving the resource utilization of pollutants in wastewater (including urea). It is expected to become an important pathway for green hydrogen production with both economic and environmental benefits. The novel composite catalyst Ru/NiMoOx@NC, prepared by supporting ruthenium on a nitrogen-doped carbon-coated nickel-molybdenum oxide support, exhibits highly efficient bifunctional catalytic activity, enabling it to efficiently catalyze the hydrogen evolution reaction (HER) and promote the urea oxidation reaction (UOR). Specifically, the introduction of trace ruthenium synergizes with the nickel-molybdenum bimetallic oxide to accelerate H₂ generation. The nitrogen-doped carbon substrate enhances the catalyst's electrical conductivity. Additionally, the incorporation of Mo reduces CO poisoning of Ni active sites during the UOR, further to enhance the catalyst's stability. By varying the loading of Ru, materials with optimal and superior properties are obtained. The Ru/NiMoO_x@NC catalysts demonstrate excellent UOR (1.37 V vs. RHE@25 mA cm⁻²; 1.39 V vs. RHE@100 mA cm⁻²) and HER (−98 mV@25 mA cm⁻²) performance under alkaline conditions. The current density of the Ru/NiMoOx@NC electrode remains almost unchanged after cyclic voltammetry (CV) tests and chronoamperometric durability tests, exhibiting excellent catalytic stability. In this system, Ru/NiMoOx@NC serves as both the anode and cathode of the urea-assisted hydrogen production battery, which only requires a voltage of 1.56 V to achieve an output current density of 50 mA cm⁻² and demonstrates excellent overall water electrolysis stability. This work provides new insights for the design of bifunctional catalysts for urea-assisted hydrogen production.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"161 ","pages":"Article 150686"},"PeriodicalIF":8.3,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722811","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":"Dynamic and flame evolution vented hydrogen-air mixtures explosion with effect of concentration and ignition location","authors":"Yong Cao ,&nbsp;Anzhi Sun ,&nbsp;Min Hua ,&nbsp;Xuhai Pan","doi":"10.1016/j.ijhydene.2025.150701","DOIUrl":"10.1016/j.ijhydene.2025.150701","url":null,"abstract":"<div><div>The influences of hydrogen concentration and ignition position on the pressure dynamic and flame behavior during the vented hydrogen-air explosion are investigated in a rectangular chamber. The pressure oscillation and flame phenomenon are analyzed by the pressure curves and external flame photos. Internal pressure curves of front-end ignition presents three overpressure peaks. The maximum internal pressure reaches 97 kPa at 35 % hydrogen concentration and the maximum external overpressure followed the same trend as internal pressure. Only one internal overpressure peak appeared under rear ignition conditions. When the hydrogen concentration reaches 45 %, the maximum internal overpressure of rear ignition rises to its peak. All the external pressure curves of front ignition display a single overpressure peak while the external pressure curve of rear-end ignition displays two overpressure peaks. The maximum external flame distance increases with rising hydrogen concentration and rear-end ignition produces longer flame distance. The external flame speed displayed oscillatory decay behavior across all experimental conditions. Flame separation occurs with visible fractures at hydrogen concentration of 45 %.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"161 ","pages":"Article 150701"},"PeriodicalIF":8.3,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722913","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":"Enzyme-functionalized, green engineered nanoparticle-modified graphite electrodes for enhanced bioanode performance in biofuel cells","authors":"Shruthi Keerthi D ,&nbsp;Mukunda Vani M ,&nbsp;Balaji Krishnamurthy","doi":"10.1016/j.ijhydene.2025.150668","DOIUrl":"10.1016/j.ijhydene.2025.150668","url":null,"abstract":"<div><div>This study investigated the development of novel enzyme immobilized bioanodes for application in biofuel cells. Nanoparticles green synthesized from plant extracts were deposited on pencil graphite electrodes followed by enzyme immobilization to obtain economical, ecofriendly, biocompatible and high performing bioanodes. The investigation examined two pencil grades, 2H and 2B, to assess bioanode performance. Morphological analyses like FTIR, SEM, EDS, and XPS confirmed the presence of phytochemical-derived functional groups on silver nanoparticle-modified PGEs, enabling effective immobilization of glucose oxidase (GOx) EIS were employed to characterize GOx/AgNP/PGE-2B, which exhibited a maximum current density of 5.005 mA with an OCP of 0.465 V, surpassing that of GOx/AgNP/PGE-2H with a current density of 3.719 mA. This outlines the impact of the synthesized nanoparticles, the type of pencil graphite used, and the enhanced role of the redox mediator The electron transfer rate was determined to be 3.677 s⁻¹ due to a surface concentration of 2.18 ∗ 10⁻¹⁰ of GOx, indicating efficient deposition, resulting in effective electron transfer between the enzyme and electrode for GOx/AgNP/PGE-2B. The GOx modified PGEs showed ∼85 % rise in current density when compared to pristine PGEs. Polarization studies revealed a maximum power density of 12.74 μW cm⁻² for GOx/AgNP/PGE-2B, followed by 7.41 μW cm⁻² for the 2H grade. The 2B grade electrode outperformed 2H, exhibiting greater efficiency due to its enhanced effective surface area from AgNP modification, which facilitated better enzyme immobilization and improved electron transfer, thereby contributing to superior bioanode performance. In conclusion, the modified bioanode demonstrated cost-effectiveness, biocompatibility, and competitiveness with commercially available electrodes, validating the strategy, and the 2B pencil lead material is more promising for this application.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"160 ","pages":"Article 150668"},"PeriodicalIF":8.1,"publicationDate":"2025-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713318","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":"Research on leakage and diffusion of hydrogen-blended natural gas in a ship engine room","authors":"Jin Qin ,&nbsp;Yingchun Xie ,&nbsp;Jie Liu ,&nbsp;Zhen Xu ,&nbsp;Songping Meng ,&nbsp;Jinchi Zhu ,&nbsp;Guijie Liu ,&nbsp;Haoxun Yuan","doi":"10.1016/j.ijhydene.2025.150537","DOIUrl":"10.1016/j.ijhydene.2025.150537","url":null,"abstract":"<div><div>Hydrogen-blended natural gas (HBNG) effectively reduces CO₂ emissions and serves as a clean, efficient, and low-carbon marine fuel alternative. Hydrogen has a diffusion coefficient approximately three times that of natural gas and an ignition energy roughly 1/15 as high. Under forced ventilation, HBNG is more prone to ignition, thereby increasing the associated risk. This study integrates experimental data and numerical simulations to investigate the effects of hydrogen blending ratio (HBR), unit temperature, and ventilation speed on the spatiotemporal distribution of hydrogen-enriched natural gas in ship engine rooms. The results indicate that HBR has a significant impact on gas diffusion and sensor response time. When HBR increased from 10 % to 20 %, the concentration of hazardous gases at distances of 4 m, 8 m, and 12 m from the leakage point increased by 39.02 %, 44.67 %, and 67.00 %, respectively. In addition, compared to 300 K, raising the temperature to 350 K and 400 K will result in an increase in gas concentration of 0.2 %–0.7 % and 0.5 %–0.9 %, respectively. Ventilation speed is the most sensitive factor affecting gas concentration, increasing the ventilation speed from 4 m/s to 10 m/s decreases the hazardous gas volume by 73.4 %.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"160 ","pages":"Article 150537"},"PeriodicalIF":8.1,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144711491","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":"Hybrid metaheuristic optimization for proton exchange membrane fuel cell parameter estimation in hydrogen energy systems","authors":"Wulfran Fendzi Mbasso ,&nbsp;Hassan M. Hussein Farh ,&nbsp;Ambe Harrison ,&nbsp;Abdullrahman A. Al-Shamma’a","doi":"10.1016/j.ijhydene.2025.150505","DOIUrl":"10.1016/j.ijhydene.2025.150505","url":null,"abstract":"<div><div>Key to the clean energy shift is hydrogen-based Proton Exchange Membrane Fuel Cells (PEMFCs), although their extremely nonlinear behavior makes proper parameter determination difficult. Designed especially to balance global search and local improvement in PEMFC modeling, this work presents a new hybrid metaheuristic method, HBASCSO, which combines the Honey Badger method (HBA) with Sand Cat Swarm Optimization (SCSO). Applied to six different PEMFC stacks, HBASCSO obtained over 90 % improvement in convergence time relative to conventional algorithms including PSO, DE, and GWO and up to 70 % reduction in estimating errors. Using Friedman ranking (Rank = 1.00) and Wilcoxon signed-rank tests (p &lt; 0.01), statistical validation confirms the higher accuracy and robustness of HBASCSO. Under control by a logistic probability function, the hybrid switching mechanism moves from global exploration to local exploitation, therefore permitting consistent performance over smooth and multimodal fitness environments. While sensitivity and noise-resilience studies verify its fit for real-time modeling, digital twin settings, and degradation-aware adaptive control in hydrogen energy systems, the MATLAB-based implementation of the technique facilitates repeatable experimentation.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"160 ","pages":"Article 150505"},"PeriodicalIF":8.1,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144711567","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}