International Journal of Hydrogen Energy最新文献

{"title":"Low-temperature direct ethanol solid oxide fuel cells based on LiNi0.8Co0.15Al0.05O2-δ electrodes","authors":"Yaoyi Lei,&nbsp;Jingtong Fang,&nbsp;Yifan Xu,&nbsp;Xunying Wang,&nbsp;Chen Xia,&nbsp;Baoyuan Wang,&nbsp;Wenjing Dong","doi":"10.1016/j.ijhydene.2025.04.284","DOIUrl":"10.1016/j.ijhydene.2025.04.284","url":null,"abstract":"<div><div>Solid oxide fuel cells (SOFCs) are environmentally friendly energy conversion devices that can be operated by using hydrogen and various hydrocarbons as fuels. Among those hydrocarbon fuels, ethanol has garnered widespread attention due to its high energy density, low transportation cost, and easy of storage, making it one of the most promising fuels for SOFCs. However, the ethanol-based SOFCs often require high operating temperature, and have the issue of performance degradation due to carbon deposition at the anode. Searching for high performance anode material is of significant importance for low-temperature direct ethanol SOFCs. This study investigates the application of LiNi_0.8Co_0.15Al_0.05O_2-δ (NCAL) as the electrode for direct ethanol SOFCs and aims to improve fuel cell performance while enhancing resistance to carbon deposition. The NCAL anode is pretreated to optimize its surface microstructure and catalytic properties. In addition, from a thermodynamic perspective, the C–H–O ratio is adjusted by using different carrier gases for ethanol to mitigate carbon deposition on the anode surface. The result shows that using CO₂ as the carrier gas facilitates the dry reforming reaction, which significantly reduces carbon deposition on the anode support and improves cell stability. This study provides insights into enhancing the performance of low-temperature direct ethanol SOFCs based on NCAL electrodes.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"130 ","pages":"Pages 242-248"},"PeriodicalIF":8.1,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876859","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":"Design and performance evaluation of HfS2/AlSe heterostructure for enhanced photocatalytic water splitting","authors":"Lijun He ,&nbsp;Cheng Mi ,&nbsp;Qijun Huang ,&nbsp;Liyan Wang ,&nbsp;Kang Ma ,&nbsp;Liang She ,&nbsp;Mi Yu ,&nbsp;Yuhang Qin ,&nbsp;Peixuan Yang","doi":"10.1016/j.ijhydene.2025.04.344","DOIUrl":"10.1016/j.ijhydene.2025.04.344","url":null,"abstract":"<div><div>In this study, a HfS₂/AlSe heterostructure was constructed and its photocatalytic performance was systematically evaluated. The complementary positions of the band edges of the HfS₂ and AlSe monolayers enable more effective separation of photogenerated charge carriers and enhancement of the photocatalytic water splitting efficiency. First-principles calculations and simulations identify the heterostructure with the lowest binding energy, confirming its feasibility and stability for photocatalytic water splitting. The built-in electric field enables the rapid recombination of electron-hole pairs at CBM and VBM, while the hydrogen evolution reaction and oxygen evolution reaction can separately be achieved at the AlSe and HfS₂ layers to complete the overall water splitting. Furthermore, the calculated solar hydrogen production (STH) efficiency of 14.94 % is significantly better than other heterostructures. The HfS₂/AlSe heterostructure exhibits excellent light absorption in the visible and UV ranges, and strain engineering is used to tuning its electronic structure, which leads to the redshift and blueshift of light absorption, optimizing its photocatalytic performance. The heterojunction exhibits high carrier mobilities (the hole mobility is 1513 cm²s⁻¹V⁻¹ in the x direction and 748 cm²s⁻¹V⁻¹ in the y direction).</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"130 ","pages":"Pages 262-270"},"PeriodicalIF":8.1,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876841","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":"Tailoring the physical and hydrogen storage properties of thermodynamically stable XSc3H8 (X= Li and Na) hydrides for the hydrogen storage application","authors":"Bilal Ahmed ,&nbsp;Muhammad Bilal Tahir ,&nbsp;Muhammad Sagir ,&nbsp;N. Dhahri","doi":"10.1016/j.ijhydene.2025.04.369","DOIUrl":"10.1016/j.ijhydene.2025.04.369","url":null,"abstract":"<div><div>Emphasizing their structural stability, metallic behaviour, and hydrogen storage capacity, this paper investigates the multifunctional potential of scandium-based XSc₃H₈ (X = Li and Na) hydrides using density functional theory (DFT), as well as their appropriateness for specialized applications including energy storage systems, catalysis, and electronic devices where small-scale, high-performance materials are desired despite scandium's high cost. The mechanical stability of both compounds is confirmed by the optimized elastic constants satisfying Born's criterion. With LiSc₃H₈ showing more stiffness, Poisson's ratio values point to a ductile character, and positive bulk and shear moduli imply significant mechanical hardness. While phonon dispersion verifies dynamic stability, electronic band structure investigation uncovers metallic behaviour. Strong UV absorption and high reflectivity seen in optical studies suggest possibility for photonic uses. With gravimetric capacities of 5.38 wt% for LiSc₃H₈ and 4.86 wt% for NaSc₃H₈, hydrogen storage study shows both compounds above the U.S. Department of Energy's 2020 objective. LiSc₃H₈ is the most promising contender as it has a lower desorption temperature (447.2 K) than NaSc₃H8 (465.5 K). These results imply that XSc₃H₈ (X = Li and Na) hydrides are possible candidates for hydrogen storage next generation.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"131 ","pages":"Pages 136-144"},"PeriodicalIF":8.1,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877381","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":"Carbon supported NiCo alloy catalyst with face-to-face encapsulated structure for electrocatalytic hydrogen evolution","authors":"Jia Jia ,&nbsp;Rui Wang ,&nbsp;Chen She ,&nbsp;Chunmei Li ,&nbsp;Yaling Niu ,&nbsp;Bo Hu ,&nbsp;Liqiu Zhang ,&nbsp;Hongjun Dong","doi":"10.1016/j.ijhydene.2025.04.296","DOIUrl":"10.1016/j.ijhydene.2025.04.296","url":null,"abstract":"<div><div>The exploitation of cost-effective catalysts for hydrogen evolution reaction (HER) remains a major challenge for electrochemical water decomposition to store clean energy. Herein, an efficient non-precious metal catalyst is developed by encapsulating NiCo alloy nanosheets with carbon nanosheets. The optimized NiCo/C catalyst achieves overpotentials of 21 mV at a current density of 10 mA cm⁻² and 105 mV at 50 mA cm⁻². These values are significantly lower than those of commercial Pt/C, which are 42 mV and 112 mV at the same current densities, respectively. Additionally, the NiCo/C catalyst exhibits long-term stability, maintaining its performance for 24 h at a current density of 10 mA cm⁻². The high HER active and stability in alkaline medium can be attributed to the synergistic effect of surface chemical state tuning of Co and Ni in the NiCo alloy and face-to-face encapsulated structure because it effectively facilitates electron transfer, accelerates reaction kinetics, and avoids corrosion of the NiCo alloy. This work provides a possibility for efficient and low-cost non-precious catalysts needed for green hydrogen production.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"131 ","pages":"Pages 20-25"},"PeriodicalIF":8.1,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874375","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":"Flow patterns and heat transfer characterization during large aspect ratio hydrogen tank filling","authors":"Arthur Couteau ,&nbsp;Panayotis Dimopoulos Eggenschwiler ,&nbsp;Patrick Jenny","doi":"10.1016/j.ijhydene.2025.04.015","DOIUrl":"10.1016/j.ijhydene.2025.04.015","url":null,"abstract":"<div><div>Temperature management in high-pressure hydrogen tank filling is crucial, requiring detailed analysis of heat transfer physics. This study used 3D CFD simulations to examine how tank aspect ratio, filling time, and orientation affect heat transfer dynamics. Results show that turbulent jet flow extends approximately three tank diameters inward, creating a mixing zone between existing and incoming hydrogen. For tanks shorter than this mixing length, simplified thermodynamic models accurately predict temperature evolution due to uniform gas mixing. Longer tanks exhibit varied flow patterns requiring consideration of multiple heat transfer mechanisms. The present work reveals consistent flow and wall heat flux patterns across different aspect ratios, suggesting potential applications for extending thermodynamic models to diverse tank geometries. These findings contribute to understanding and optimizing high-pressure hydrogen filling processes, with implications for efficient tank design and operation.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"131 ","pages":"Pages 26-32"},"PeriodicalIF":8.1,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874377","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":"A high-performance and stable Pr1.9Bi0.1Ni0.9Cu0.1O4+δ@BaZr0.1Ce0.7Y0.1Yb0.1O3 core-shell composite cathode for PCFCs","authors":"Yuheng Wang ,&nbsp;Jinsheng Li ,&nbsp;Wenlu Li ,&nbsp;Shimin Wang ,&nbsp;Jian Li","doi":"10.1016/j.ijhydene.2025.04.229","DOIUrl":"10.1016/j.ijhydene.2025.04.229","url":null,"abstract":"<div><div>Ruddlesden - Popper (RP) structured PrNi₂O_4+δ (PN) doped with Bi (Pr₁.₉Bi₀.₁NiO₄₊δ, PBN), Cu (Pr₂Ni₀.₉Cu₀.₁O₄₊δ, PNC), and Bi/Cu (Pr₁.₉Bi₀.₁Ni₀.₉Cu₀.₁O₄₊δ, PBNC) is studied as a component in BaZr₀.₁Ce₀.₇Y₀.₁Yb₀.₁O₃ (BZCYYb) supported composite cathode for proton - conducting fuel cells (PCFCs). The BZCYYb scaffold transports protons, and the solution - impregnated RP coating conducts oxygen ions and electrons, enabling the cathode to exhibit the triple - conduction behavior required by PCFCs. The results indicate that the co-doped PBNC effectively reduces the phase formation temperature and enhances the catalytic activity of oxygen reduction reactions and performance stability. These improvements are attributed to its increased surface concentration of oxygen vacancy, which promotes the absorption and dissociation of water and oxygen, and thus surface hydration (protonation) reactions. With humidified hydrogen (3 % H₂O) fuel and air oxidant, the single cell with the PBNC@BZCYYb core - shell cathode achieves a peak power density of 0.680 W cm⁻² at 700 °C, around a 1 - time increase compared to that with the PN@BZCYYb cathode, and performs stably over 600 h at 0.5V and 650 °C. These findings demonstrate the potential of PBNC@BZCYYb as a high - performance cathode for medium and low temperature PCFC, providing new possibilities for efficient energy conversion.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"131 ","pages":"Pages 109-117"},"PeriodicalIF":8.1,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance of Co–Cu bimetallic catalysts for catalytic syngas to produce higher alcohols: Influence of the preparation methods, CoCu ratios, and carriers","authors":"Xinyue Hu ,&nbsp;Fei Li ,&nbsp;Kunmou Shi ,&nbsp;Lei Han ,&nbsp;Yuanjun Che","doi":"10.1016/j.ijhydene.2025.04.343","DOIUrl":"10.1016/j.ijhydene.2025.04.343","url":null,"abstract":"<div><div>Higher alcohols (C₂₊ mixed alcohols) have attracted much attention due to their high application value in the fuel, chemical industry, and the environment. Producing higher alcohols from syngas accords with the atomic economy, whereas the performance of related catalysts is not acceptable. To enhance the catalyst reactivity, stability, and product selectivity, the influence of the preparation methods, Co–Cu ratios, and carriers on the performance of Co–Cu bimetallic catalysts are investigated. First, the bimetallic catalysts with different Co/Cu molar ratio (Co_xCu₁/SiO₂) were prepared by the impregnation method. The results show that the Co₂Cu₁/SiO₂ catalyst showed the best performance with a selectivity of 51.9 % for ROH and 35.5 wt % yield for C₂₊ alcohol. This is because the Cu and Co nanoparticles are uniformly and tightly distributed in the Co₂Cu₁/SiO₂ catalyst. For further improving the performance of the catalyst, the Co₂Cu₁-Z@SiO₂ catalyst was prepared by in situ synthesis method. This Co₂Cu₁-Z@SiO₂ catalyst provides high dispersion and abundant active sites, strong synergetic of Co and Cu species, thus significantly improving the CO conversion rate and ROH selectivity to 75.6 % and 61.3 %, respectively. Besides, compared to Co₂Cu₁/SiO₂ catalyst, the Co₂Cu₁-Z@SiO₂ catalyst promoted synergistic catalysis between the CO dissociation and CO insertion, leading to the better catalyst performance. In addition, the channel limitation of the carrier enables the Co₂Cu₁-Z@SiO₂ catalyst to maintain good stability within 200 h. This provides a new exploration for further development of bimetallic catalysts with better performance, more stability and higher selectivity in syngas conversion to higher alcohols.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"131 ","pages":"Pages 82-97"},"PeriodicalIF":8.1,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877380","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":"Scaling up green hydrogen in China: Economic opportunities and challenges","authors":"Ruiqian Su ,&nbsp;Ye Xiao ,&nbsp;Fadhila Hamza ,&nbsp;Zokir Mamadiyarov ,&nbsp;Abdul Wahab","doi":"10.1016/j.ijhydene.2025.04.126","DOIUrl":"10.1016/j.ijhydene.2025.04.126","url":null,"abstract":"<div><div>The transition toward a low-carbon energy system has placed green hydrogen at the forefront of China's decarbonization agenda; however, scaling up its production and integration remains constrained by economic, infrastructural, and policy-related challenges. This study aims to evaluate the economic opportunities and structural barriers associated with the large-scale deployment of green hydrogen in China, with a focus on the period from 2025 to 2040. Using a dynamic computable general equilibrium (CGE) model tailored to China's regional energy economy, the research assesses the potential impacts of hydrogen expansion under varying renewable energy cost scenarios and carbon pricing regimes. The analysis reveals that (1) green hydrogen can reduce industrial sector emissions by up to 38 % in high-adoption scenarios; (2) regions with abundant solar and wind capacity, particularly Inner Mongolia and Gansu, emerge as cost-competitive production hubs; (3) national GDP sees a marginal net gain of 0.4 % by 2040 under integrated policy support; and (4) carbon pricing significantly improves the competitiveness of hydrogen over fossil-based alternatives. The findings suggest that coordinated fiscal incentives, infrastructure investments, and market reforms are essential to unlock the full potential of green hydrogen in China's energy transition.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"131 ","pages":"Pages 60-69"},"PeriodicalIF":8.1,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874376","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":"Modeling of the electrode process in CuCl(aq)/HCl(aq) electrolyzer","authors":"LiFei Wang ,&nbsp;QiXiang Su ,&nbsp;QunZhi Cheng ,&nbsp;QingChun Yu ,&nbsp;ShuBiao Yin ,&nbsp;GuoZhi Wang ,&nbsp;JiaSheng Yang","doi":"10.1016/j.ijhydene.2025.04.212","DOIUrl":"10.1016/j.ijhydene.2025.04.212","url":null,"abstract":"<div><div>The electrolysis of CuCl/HCl(aq) is a crucial step in the Cu–Cl thermochemical cycle for hydrogen production. Due to the differing electrolyte flow characteristics between the cathode and anode chambers, the factors influencing their electrolysis efficiency vary accordingly. In this study, we investigated the microphysical properties of the anode separately, as well as the effects of bubbles on the cathode during Cu–Cl electrolysis. The results from both experiments and simulations indicate that at low current densities, increasing temperature and decreasing flow rate facilitate the conversion of Cu ⁺ to Cu²⁺ in the anolyte, with flow rate exerting a more pronounced effect. The accumulation of Cu²⁺ on the electrode surface leads to increased diffusion resistance, which adversely affects mass transfer. At high current densities, the Euler-Euler CFD model combined with particle tracking methods effectively calculated bubble trajectories and velocities within the electrolyzer. The hydrogen volume fraction at the cathode decreased with increasing electrolyte velocity, particularly at higher current densities. The width of the hydrogen bubble curtain diminished as the electrolyte inlet velocity increased. Both the adsorption of hydrogen bubbles on the electrode surface and their dispersion within the electrolyte significantly influence the overpotential.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"131 ","pages":"Pages 48-59"},"PeriodicalIF":8.1,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874428","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":"A comprehensive study of MIL-88a as a key component of hybrid polymer electrolytes for H2 fuel cells","authors":"Ivan Gorban ,&nbsp;María Teresa Pérez-Prior ,&nbsp;Maksim Gritsai ,&nbsp;Alejandro Várez ,&nbsp;Nieves Ureña ,&nbsp;Belén Levenfeld ,&nbsp;Jean-Yves Sanchez ,&nbsp;Carmen del Río ,&nbsp;Mikhail Soldatov","doi":"10.1016/j.ijhydene.2025.04.316","DOIUrl":"10.1016/j.ijhydene.2025.04.316","url":null,"abstract":"<div><div>In this work, an electrochemical study of the iron fumarate metal-organic framework structure MIL-88a was carried out. This MOF exhibits an exceptional characteristic: it alters the parameters of its crystal lattice in response to temperature variations and the specific guest molecules present. Through impedance spectroscopy, we investigated how guest molecules within the pores of MIL-88a influence the material's ionic conductivity and its responsiveness to changing environmental conditions. Based on the data obtained, hybrid membranes based on sulfonated multiblock copolymers of polysulfone and polyphenylsulfone (SPES) doped with MIL-88a were prepared. The distribution of crystallites in the membrane was assessed by using scanning electron microscopy. It was found that crystallites agglomerates reduce the tensile strength of the membrane from 87 to 69 MPa, and from 56 to 42 MPa in the dry and wet forms, respectively. The presence of this MOF doubles the water absorption of the hybrid membranes compared to the pure one, resulting in an improvement of their ionic conductivity from 15.8 to 26.5 mS/cm at 80 °C. Hybrid membranes show a high maximum power density (1040 mWcm⁻²) in the fuel single cell test that is comparable to that obtained for commercial perfluoro-sulfonic acid PEMs such as Nafion®.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"131 ","pages":"Pages 98-108"},"PeriodicalIF":8.1,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877383","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}