International Journal of Hydrogen Energy最新文献

{"title":"Development of Ti–Mn alloys with low hysteresis and high capacity by introducing Cr","authors":"Liang Zeng ,&nbsp;Liu Luo ,&nbsp;Jian He ,&nbsp;Ding Zhu ,&nbsp;Shijia Mu ,&nbsp;Wei Wang ,&nbsp;Yigang Yan ,&nbsp;Chaoling Wu ,&nbsp;Yungui Chen","doi":"10.1016/j.ijhydene.2025.03.287","DOIUrl":"10.1016/j.ijhydene.2025.03.287","url":null,"abstract":"<div><div>Ti–Mn hydrogen storage alloys have excellent comprehensive advantages, including high reversible capacity, good cycling stability, and cost-effectiveness. However, the significant hydrogen absorption and desorption hysteresis hinders its practical applications. In this work, a systematic investigation is conducted into the effects of Cr content on the composition, structure, and hydrogen storage properties of Ti_1.25Mn_{1.75-<em>x</em>}Cr_<em>x</em> (<em>x</em> = 0, 0.05, 0.15, and 0.25) alloys, with a particular focus on the impact of Cr introduction on the hydrogen absorption and desorption hysteresis of these alloys. The experimental results indicate that the alloy exhibits the best overall hydrogen storage properties when x = 0.15, with a maximum reversible hydrogen storage capacity of 1.96 wt%. The introduction of Cr can significantly reduce hysteresis without notably altering the hydrogen absorption and desorption properties. The hysteresis factor decreases from 0.1881 (<em>x</em> = 0) to 0.0496 (<em>x</em> = 0.25). Notably, a reasonable explanation for how the introduction of Cr reduces hysteresis in Ti–Mn alloys based on the material's plastic deformation properties is given. This study provides insights for the design of Ti–Mn alloys with low hysteresis and high capacity.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"120 ","pages":"Pages 315-322"},"PeriodicalIF":8.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698048","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":"Understanding the kinetic enhancement of hydrogen sorption in MgH2 via KNbO3 through the perspective of the catalytic mechanism","authors":"Bhawna Rathi ,&nbsp;Shivani Agarwal ,&nbsp;Kriti Shrivastava ,&nbsp;Hiroki Miyaoka ,&nbsp;Takayuki Ichikawa ,&nbsp;Manoj Kumar ,&nbsp;Ankur Jain","doi":"10.1016/j.ijhydene.2025.03.273","DOIUrl":"10.1016/j.ijhydene.2025.03.273","url":null,"abstract":"<div><div>MgH₂ possesses the attributes of a superior hydrogen storage material because of its excellent efficiency, safety, large hydrogen storage capacity, and cheap cost. However, it still has certain flaws, including a high working temperature and sluggish desorption kinetics, which restrict its applicability and open possibilities to device new methodologies to circumvent these obstacles. The current work is concerned with the study of the hydrogen storage capabilities of MgH₂ - <em>x</em> wt% KNbO₃ (<em>x</em> = 5,10,15) and the underlying mechanism. Among these composites, the MgH₂+ 10 wt% KNbO₃ sample has the finest performance, which was concluded after evaluating the desorption temperature and isothermal absorption kinetics. Compared to the as-milled and as-received MgH₂, the 10 wt% doped sample began to emanate hydrogen at about 232 °C (onset temperature) with a peak temperature of 238.5 °C; a reduction of almost 96 °C and 180 °C, respectively. Furthermore with the addition of 10 wt% KNbO₃, the apparent activation energy for dehydrogenation was decreased from 170 kJ/mol for as received MgH₂ to 70 kJ/mol for catalyzed one. The catalysis yields a 60 % decrement in the kinetic barrier, which is a rather remarkable result compared to the pristine one. Hydrogen absorption at room temperature sees a remarkable upgradation in terms of both increased rate and higher wt% stored by the catalyzed sample (4.28 wt% in 4 h) compared to milled one (0.22 wt% in 4 h). X-ray diffraction (XRD), Scanning electron microscope (SEM), and X-ray photoelectron spectroscopy (XPS) were performed after each step to gain an in-depth understanding of the catalytic mechanism. XPS confirmed that the higher valency Nb (+5) in KNbO₃ was converted to the lower valency speceies, which fastened the transformation of electrons. Additionally, the formation of oxygen vacancies was confirmed which act as active centers and promote electron mobility and hydrogen diffusivity. This event created a multielement multivalent catalytic environment, which improves the sorption kinetics of MgH₂. Our research might serve as a blueprint for future high-performance, complex catalyst creation for magnesium hydride as reversible hydrogen storage.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"120 ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696112","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":"Enhanced hydrogen storage through the synergistic integration of LiAlH4 and carbazole-based liquid organic hydrogen carrier","authors":"Huilin Liu ,&nbsp;Yunfeng Lei ,&nbsp;Khai Chen Tan ,&nbsp;Yazhou Wang ,&nbsp;Xiaohua Ju ,&nbsp;Hailiang Chu ,&nbsp;Yongjin Zou ,&nbsp;Teng He ,&nbsp;Yong Shen Chua","doi":"10.1016/j.ijhydene.2025.03.318","DOIUrl":"10.1016/j.ijhydene.2025.03.318","url":null,"abstract":"<div><div>Lithium aluminum hydride (LiAlH₄) and 9-ethyl carbazole (NCZ) are attractive hydrogen storage materials due to high hydrogen storage capacity. However, the practical application of LiAlH₄ and NCZ are hindered by limited reversibility and sluggish reaction kinetics, respectively. In this study, we report the synergistic integration of LiAlH₄ and 9-ethyl carbazole in a 1:1 molar ratio (LA-NCZ) which resulted in remarkable improvement in the hydrogen storage properties. NCZ significantly lowered the dehydrogenation temperature of LiAlH₄, enabling rapid hydrogen release between 150 °C and 160 °C. The dehydrogenated products of LiAlH₄ (i. e., LiH and Al), on the other hand, enhanced the hydrogenation selectivity and kinetics of NCZ, achieving faster hydrogen uptake and higher conversion efficiency under mild conditions (90 °C, 70 bar H₂). These mutual enhancements reveal the complementary advantages of the LA-NCZ composite, providing a systematic approach to improving hydrogen storage efficiency, reversibility, and selectivity.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"120 ","pages":"Pages 276-281"},"PeriodicalIF":8.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697944","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":"Beneficial role of silicotungstic acid presence on the WO3-modified boron-doped diamond substrate on the electrocatalytic activity for methanol anodic oxidation of supported platinum","authors":"Nicolae Spătaru ,&nbsp;Loredana Preda ,&nbsp;Elena Matei ,&nbsp;Veronica Satulu ,&nbsp;Marius Alexandru Mihai ,&nbsp;Mihai Marian Radu ,&nbsp;Cristina Donath ,&nbsp;Olivia Georgeta Moga ,&nbsp;Tanţa Spătaru","doi":"10.1016/j.ijhydene.2025.03.327","DOIUrl":"10.1016/j.ijhydene.2025.03.327","url":null,"abstract":"<div><div>The present paper evidences the beneficial effect that the combination of Pt with WO₃ and silicotungstic acid (STA) brings to the methanol oxidation electroactivity. To avoid substrate interferences boron doped diamond (BDD) was used as the electrocatalysts support. SEM measurements have shown that the use of a STA/WO₃/BDD substrate allows the electrodeposition of smaller Pt clusters, exhibiting better dispersion, higher homogeneity in terms of size and enhanced electrochemically active surface area. Cyclic voltammetry, polarization and EIS experiments demonstrated than STA addition on the WO₃/BDD support induces to the deposited Pt higher activity and improved resistance to fouling during methanol anodic oxidation. Based on the XPS results such behavior was tentatively ascribed to the higher surface concentration of Pt(OH)₂ species and adsorbed water that STA presence enables, which may assist in the oxidative desorption of reaction intermediates.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"120 ","pages":"Pages 403-411"},"PeriodicalIF":8.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705566","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":"Knowledge-driven multi-timescale optimization dispatch for hydrogen-electricity coupled microgrids","authors":"Zhicheng Wei,&nbsp;Bin Jia,&nbsp;Xing Dong,&nbsp;Fan Li,&nbsp;Bo Sun","doi":"10.1016/j.ijhydene.2025.03.274","DOIUrl":"10.1016/j.ijhydene.2025.03.274","url":null,"abstract":"<div><div>Hydrogen-electricity coupled microgrids (HEMGs), which convert surplus renewable electricity into hydrogen, promise to reduce the asynchronous spatial and temporal distribution between renewable energy outputs and the load demands. However, given the complex system structure and different characteristics of renewable and hydrogen energies, optimizing the dispatch is a difficult task. In this paper, the source-storage-load dispatch problem of HEMGs is solved with a knowledge-driven multi-timescale optimization dispatch strategy. First, the multi-timescale dispatch strategy of seasonal hydrogen storage, day-ahead economic dispatch and intraday dynamic optimization is proposed to balance the supply-and-demand fluctuations. Second, an improved knowledge-driven optimization framework is designed and a knowledge network is established by using the knowledge accumulated from historical data and expert experience to enhance the optimization quality. Third, the system operation under fluctuating inputs is optimized using a variable neighborhood search solution algorithm based on the dynamic window approach. Case studies demonstrated that the proposed optimization strategy reduces the operating cost, carbon emissions and solution time by 23.58 %, 33.95 % and 25.35 % with the proposed optimization strategy.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"120 ","pages":"Pages 333-345"},"PeriodicalIF":8.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698041","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":"Morphology evolution of spinel NiCo2O4 catalyst and its crystal plane effect in oxygen evolution reaction","authors":"Qimei Liang ,&nbsp;Yihui Liu ,&nbsp;Dong Yan ,&nbsp;Liuyang Bai ,&nbsp;Hui Kang ,&nbsp;Chao Wang","doi":"10.1016/j.ijhydene.2025.03.261","DOIUrl":"10.1016/j.ijhydene.2025.03.261","url":null,"abstract":"<div><div>The crystal plane effect of cobalt-based oxide has garnered much attention in the oxygen evolution reaction (OER) and other electrocatalytic applications. Herein, we synthesized octahedron, truncated octahedron, and cubic NiCo₂O₄ with successively exposing increased area ratio of (100)/(111) planes regulated by the NaOH adding amount, further explored their OER behaviors. The nano-sized NiCo₂O₄-5 truncated octahedron was prepared under 5 ml NaOH exposing a relatively large and clear (111) plane area due to good crystallinity. Density Functional Theory (DFT) calculations reveal that the (111) plane features higher dangling bond density, smaller d-band centers, and stronger M − O (M = Ni, Co) covalency compared to the (100) plane, resulting in enhanced electron transfer and adsorption capabilities. These advantages endow NiCo₂O₄-5 with favorable dynamic behaviors and adsorption capacity during the alkaline OER process at room temperature, that the NiCo₂O₄-5/NF displays a low overpotential of 338.4 mV at 100 mA/cm² and long-term stability of 25 h. This work reveals the crystal planes evolution mechanism of spinel NiCo₂O₄ crystal, and the crystal plane effect of NiCo₂O₄ oxide as a catalyst on OER performance promotion.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"120 ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696560","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 simplified test rig for high throughput screening of proton exchange membrane water electrolysis components","authors":"Florian Berg,&nbsp;Meital Shviro ,&nbsp;Marcelo Carmo ,&nbsp;Nikolai Utsch,&nbsp;Martin Müller","doi":"10.1016/j.ijhydene.2025.03.210","DOIUrl":"10.1016/j.ijhydene.2025.03.210","url":null,"abstract":"<div><div>The research and development of components for polymer electrolyte membrane (PEM) water electrolysis are often constrained by limited test rig capacity. This study introduces a novel, compact test rig to facilitate rapid screening and extended operation of mini cells, featuring an active area of just 1.13 cm². The setup can simultaneously evaluate the performance of 24 test cells, offering a simple, cost-effective, and space-saving solution. Utilizing hydrostatic pressure, the system operates without an active water supply, significantly reducing the costs and materials required for components such as porous transport layers and membrane electrode assemblies. This innovative test rig accelerates material characterization for PEM electrolyzers and supports comprehensive long-term operation studies, thereby advancing the field of electrolysis research.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"120 ","pages":"Pages 385-392"},"PeriodicalIF":8.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705563","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":"Promoting effect of hydrogen compared with hydrocarbons on laminar flame speeds of ammonia","authors":"Wu Jin ,&nbsp;Jiajun You ,&nbsp;Shujie Shen ,&nbsp;Geyuan Yin ,&nbsp;Jianzhong Li ,&nbsp;Erjiang Hu ,&nbsp;Zuohua Huang","doi":"10.1016/j.ijhydene.2024.12.108","DOIUrl":"10.1016/j.ijhydene.2024.12.108","url":null,"abstract":"<div><div>A comprehensive model for ammonia blends with hydrogen, syngas, methane, ethane and propane, named P-NUIG, was proposed in this work. This model undergoes rigorous experimental validation across a wide array of conditions, promoters, and combustion characteristics. Additionally, this paper compares the promotional effects of different fuels, namely hydrogen, syngas, methane, ethane, and propane, on the laminar flame speed of ammonia at full blending ratios (0–90 vol%). Our findings reveal that these promoters exhibit a non-linear enhancement on ammonia's laminar flame speed. Specifically, hydrogen and syngas demonstrate an initial gradual increase, followed by a rapid acceleration as the blending ratio escalates. Conversely, for larger alkanes, the laminar flame speed experiences a swift initial rise and then a gradual increase thereafter. This phenomenon can be categorized into three distinct regions: the ammonia chemistry-dominant region, the transition region, and the promoter chemistry-dominant region. Notably, an intersection point is identified at approximately <em>X</em>_P = 40%. This indicates that when X_P is less than 40%, the enhancement of ammonia's laminar flame speed by larger alkanes surpasses that of syngas and hydrogen. However, when X_P exceeds 40%, the enhancement by larger alkanes becomes weaker compared to syngas and hydrogen. Thermal effect analysis indicated that the adiabatic temperature of ammonia mixed with larger alkanes follows the similar pattern as the laminar flame speed versus <em>X</em>_P. Additionally, kinetic analysis uncovers a linear relationship between laminar flame speed and <em>Y</em>_{max(H + OH)} regardless of fuel type. This relationship is attributed to the chemical structure of the fuels, where H atoms are more readily generated during the oxidation of larger alkanes. Consequently, the laminar flame speed of NH₃ responds more swiftly to the incorporation of alkanes.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"120 ","pages":"Pages 282-303"},"PeriodicalIF":8.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698045","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 on Ni-ceramic cathode degradation in H2O electrolysis using a two-dimensional patterned cell","authors":"Xiaolin Shao ,&nbsp;Riyan Achmad Budiman ,&nbsp;Takashi Sato ,&nbsp;Mina Yamaguchi ,&nbsp;Keiji Yashiro ,&nbsp;Tatsuya Kawada","doi":"10.1016/j.ijhydene.2025.03.236","DOIUrl":"10.1016/j.ijhydene.2025.03.236","url":null,"abstract":"<div><div>The degradation of fuel electrodes in solid oxide electrolysis cells (SOECs) remains a major barrier to their commercialization. The complex electrode structures of conventional cells complicate the study of degradation mechanisms. To address this challenge, this study employed a simplified electrode structure by designing and fabricating a comb shaped patterned cell to examine cathode degradation in SOECs. Yttria-stabilized zirconia (YSZ) and Ce_0.9Gd_0.1O_1.95 (GDC) were used as ceramic materials, with varying pattern sizes designed to investigate their reaction characteristics. Electrochemical analysis combined with microstructural characterization revealed that Ni detachment occurred exclusively on the GDC film, contributing to increased ohmic resistance. By contrast, no significant microstructural changes were observed in Ni-YSZ systems. These differences were likely attributed to the higher oxygen vacancy concentration at the GDC interface, resulting from the oxygen nonstoichiometry of the material. Additionally, while ohmic resistance increased, polarization resistance showed comparatively minor changes, suggesting that the reaction degradation was less severe. Further analysis of the pattern size revealed that reactions in the Ni-GDC system were not restricted to the three-phase boundary but extended to the double-phase boundary, highlighting the broader reaction region in these systems.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"120 ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696111","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":"Hydrogen-rich gas by catalytic pyrolysis of polyethylene via mono and bimetallic Fe/Ni catalysts","authors":"Bo Luo ,&nbsp;Dexin Kong ,&nbsp;Shuxiao Wang ,&nbsp;Rui Shan ,&nbsp;Haoran Yuan ,&nbsp;Yong Chen","doi":"10.1016/j.ijhydene.2025.03.330","DOIUrl":"10.1016/j.ijhydene.2025.03.330","url":null,"abstract":"<div><div>Catalytic thermal conversion represents a promising strategy for transforming waste plastics into high value products. This research demonstrates a two-stage pyrolysis catalysis integrated system for polyethylene valorization and hydrogen-enriched syngas production. Mono-/bimetallic Fe/Ni-ZSM catalysts were synthesized and systematically characterized to evaluate their structural and catalytic properties. Key operational parameters including metal loading, catalyst-to-polyethylene ratio, and steam flow rate were optimized to maximize gas yield and hydrogen selectivity. Experimental results revealed that bimetallic catalysts, particularly those with higher Ni content, exhibited superior catalytic performance compared to monometallic analogues due to the synergistic Fe–Ni alloy formation and enhanced metal-support interactions. Under optimal conditions (6 mL/h steam flow, 1:1 polyethylene-to-catalyst ratio), the 5Fe10Ni-ZSM catalyst achieved a hydrogen yield of 133.99 mmol/g_PE with 70.40 % volumetric concentration in syngas. It was also found that irregular carbon nanostructures were formed on the surface of the spent catalyst. This study offers a novel method for repurposing waste polyethylene.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"120 ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696563","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}