International Journal of Hydrogen Energy最新文献

{"title":"A novel monolithic microreactor for producing hydrogen in high safety","authors":"Tianqing Zheng ,&nbsp;Mengmeng Zhang ,&nbsp;Youji Zhan ,&nbsp;Jixuan Xu ,&nbsp;Hongsang Qiu","doi":"10.1016/j.ijhydene.2025.04.237","DOIUrl":"10.1016/j.ijhydene.2025.04.237","url":null,"abstract":"<div><div>Current hydrogen production microreactors typically use laminated cavity plates for assembly. However, as the number of cavity plates increases, the number of graphite sealing sheets also rises, leading to a higher risk of gas leakage. To address this issue, this study proposes a monolithic microreactor manufactured using additive manufacturing process. The hydrogen production performance of the microreactor is analyzed through simulation. The results indicate that the porosity of the reaction support and the reaction temperature are positively correlated with methanol conversion, H₂ flow rate, and CO selectivity. In contrast, the injection rate of the methanol-water mixture is negatively correlated with methanol conversion and CO selectivity, but positively correlated with H₂ flow rate. Compared to microreactors scaled up in size, those with an increased number of reaction supports demonstrate superior hydrogen production performance, with methanol conversion and H₂ flow rate improved by 1.4 % and 2.5 %, respectively, while CO selectivity decreases by 2.38 %. Compared with traditional microreactor, the sealing performance and the flow rate of reaction product of monolithic microreactor increases by 280.1 % and 31.9 %, respectively.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"130 ","pages":"Pages 45-53"},"PeriodicalIF":8.1,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143863927","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":"Electrodeposited Ni–C amorphous alloys: A novel approach to enhancing catalytic activity for hydrogen evolution and urea electrooxidation","authors":"Dawid Kutyła","doi":"10.1016/j.ijhydene.2025.04.290","DOIUrl":"10.1016/j.ijhydene.2025.04.290","url":null,"abstract":"<div><div>This study presents the electrodeposition of nickel–carbon (Ni–C) amorphous alloys using arginine as a carbon precursor in a modified Watts bath. Increasing carbon content leads to structural amorphization, reduced crystallite size (down to 8 nm), and enhanced electrochemically active surface area (ECSA). Electrochemical tests reveal improved catalytic performance for both hydrogen evolution (HER) and urea electrooxidation. The overpotential at −10 mA/cm² for HER is significantly reduced (−0.243 V vs. RHE), and Ni–C electrodes exhibit 10-time higher current densities for urea oxidation at +1.55 V in 1 M NaOH +0.33 M urea compared to pure nickel. The presence of carbon promotes the formation of the Ni(OH)₂/NiOOH redox couple by increasing the electrochemically active surface area and enhancing oxidation efficiency. These results highlight Ni–C alloys as promising electrode materials for energy conversion and waste valorization applications.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"129 ","pages":"Pages 184-192"},"PeriodicalIF":8.1,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869831","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":"Life cycle assessment of solar energy conversion into synthetic natural gas for transportation including CO2 capture and dual shipping","authors":"Jordy Motte ,&nbsp;Joachim Boddez ,&nbsp;Jim Gripekoven ,&nbsp;Pieter Nachtergaele ,&nbsp;Jan Mertens ,&nbsp;Samuel Saysset ,&nbsp;Jo Dewulf","doi":"10.1016/j.ijhydene.2025.04.283","DOIUrl":"10.1016/j.ijhydene.2025.04.283","url":null,"abstract":"<div><div>Renewable energy production in Belgium is highly challenging due to limited land availability. The import of solar energy from regions with high solar irradiation, e.g., the Atacama Desert, via energy vectors such as synthetic natural gas (SNG) produced from CO₂ can be an alternative. In this work, two different CO₂ sources for SNG production were investigated: direct air capture (DAC) (Case 1) and CO₂ capture from a point source (Case 2). This paper aims to assess the environmental impacts of the production and transportation of this energy vector, including CO₂ capture, benchmarked to the conventional natural gas production and its import in Belgium (reference). The results show that Case 1 has a lower impact on climate change and fossil resource use than Case 2 and the reference. However, the impact of Case 1 on other LCA indicators (e.g., freshwater ecotoxicity) is higher than the reference, but lower than Case 2.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"129 ","pages":"Pages 150-160"},"PeriodicalIF":8.1,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869833","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":"Sensitivity of activation energy and thermal radiation in dihydrogen oxide based nanofluid performance in PTSC","authors":"Umar Farooq ,&nbsp;Tao Liu ,&nbsp;Ali Alshamrani ,&nbsp;M. Mahtab Alam","doi":"10.1016/j.ijhydene.2025.04.313","DOIUrl":"10.1016/j.ijhydene.2025.04.313","url":null,"abstract":"&lt;div&gt;&lt;div&gt;This study investigates the flow characteristics and thermal performance of &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;A&lt;/mi&gt;&lt;msub&gt;&lt;mi&gt;l&lt;/mi&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;/msub&gt;&lt;mo&gt;/&lt;/mo&gt;&lt;msub&gt;&lt;mi&gt;H&lt;/mi&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; nanofluid across a curved, stretchable sheet for application in parabolic trough solar collectors (PTSC). Nanofluids, mostly water-based, enhance heat transfer efficiency in solar energy systems. This work investigates the effects of activation energy, thermal radiation, and chemical reactions on the performance of nanofluids, which is critical for optimizing sustainable energy technologies. Heat transfer is modeled by incorporating curvature, viscous forces, radial pressure gradients, thermal radiation, and chemical reactions. This work's novelty lies in conducting a sensitivity analysis to test which parameters are most sensitive to the combined effects of activation energy, thermal radiation, and chemical reaction rate, a key factor in the space environment. The Koo–Kleinstreuer–Li (KKL) model accounts for the interaction of nanoparticles in effective thermal conductivity and viscosity. Using similarity transformations, the governing equations for momentum, energy, and nanoparticle concentration are transformed into ordinary differential equations (ODEs) and solved using the BVP4C MATLAB scheme. The results, illustrated graphically, show that increasing curvature &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;Λ&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; and activation energy &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;E&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; improve the concentration profile, while chemical reaction rate &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;κ&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; and Schmidt number &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mrow&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;/mrow&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; decrease it. The temperature profile increases with higher radiation parameters &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mrow&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;mi&gt;d&lt;/mi&gt;&lt;/mrow&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; and Biot number &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mrow&gt;&lt;mi&gt;B&lt;/mi&gt;&lt;mi&gt;i&lt;/mi&gt;&lt;/mrow&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;. Response surface methodology (RSM) evaluate the impact of input parameters &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;0.1&lt;/mn&gt;&lt;mo&gt;≤&lt;/mo&gt;&lt;mi&gt;E&lt;/mi&gt;&lt;mo&gt;≤&lt;/mo&gt;&lt;mn&gt;1.3&lt;/mn&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mn&gt;0.1&lt;/mn&gt;&lt;mo&gt;≤&lt;/mo&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;mi&gt;d&lt;/mi&gt;&lt;mo&gt;≤&lt;/mo&gt;&lt;mn&gt;1.4&lt;/mn&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, and &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mn&gt;0.1&lt;/mn&gt;&lt;mo&gt;≤&lt;/mo&gt;&lt;mi&gt;κ&lt;/mi&gt;&lt;mo&gt;≤&lt;/mo&gt;&lt;mn&gt;0.8&lt;/mn&gt;&lt;/mrow&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; on system performance. Analysis of variance (ANOVA) using RSM quantifies the impact of parameters on energy efficiency, with &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msup&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msup&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;95.80&lt;/mn&gt;&lt;mo&gt;%&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; and &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;A&lt;/mi&gt;&lt;mi&gt;d&lt;/mi&gt;&lt;mi&gt;j&lt;/mi&gt;&lt;msup&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msup&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;92.10&lt;/mn&gt;&lt;mo&gt;%&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; for the Nusselt number &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mrow&gt;&lt;mi&gt;N&lt;/mi&gt;&lt;mi&gt;u&lt;/mi&gt;&lt;/mrow&gt;&lt;mo&gt;)&lt;","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"129 ","pages":"Pages 253-264"},"PeriodicalIF":8.1,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869973","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 analysis of green hydrogen production from onshore wind for Morocco","authors":"Soufiane Bahou","doi":"10.1016/j.ijhydene.2025.04.281","DOIUrl":"10.1016/j.ijhydene.2025.04.281","url":null,"abstract":"<div><div>This study provides a novel analysis of the future of green hydrogen in Morocco. A detailed techno-economic assessment of hydrogen production using wind electricity is presented and discussed, offering new insights into the viability and potential of wind-powered hydrogen generation across different regions of the country. The first step of this study is to assess the wind energy potential at the studied locations. Then, the levelized cost of energy, the levelized cost of hydrogen, the energy efficiency, and the amount of hydrogen produced by wind electricity are analyzed for each of the selected sites. The study evaluates hydrogen production and its cost at 13 sites throughout the country and ranks them according to the amount of hydrogen produced by wind electricity. The results reveals that the levelized cost of energy ranges from 0.0269 to 0.303 USD/kWh. In addition, the study shows that Koudia Al Baida and Haouma are the best appropriate locations for hydrogen production, while Tiznit is the least qualified. Moreover, the levelized cost of hydrogen in Koudia Al Baida is estimated at 2.23 USD/kg, while the levelized cost of hydrogen in Tiznit is 24.75 USD/kg.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"129 ","pages":"Pages 51-59"},"PeriodicalIF":8.1,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143863326","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":"Identifying the unknown parameters of PEM fuel cells based on a human-inspired optimization algorithm","authors":"Badis Lekouaghet ,&nbsp;Mohammed Haddad ,&nbsp;Mohamed Benghanem ,&nbsp;Mohammed Amin Khelifa","doi":"10.1016/j.ijhydene.2025.04.301","DOIUrl":"10.1016/j.ijhydene.2025.04.301","url":null,"abstract":"<div><div>With the increasing reliance on hydrogen as an energy carrier, significant advancements are being made in the evolving energy sector. Proton exchange membrane fuel cells (PEMFCs) play a central role in this transformation, offering an efficient and sustainable alternative to fossil fuels. Accurate modeling of PEMFCs is essential for performance analysis and optimization. This study proposes a novel approach to estimate seven unspecified PEMFC parameters using the Adolescent Identity Search Algorithm (AISA), a human-inspired optimization technique. The AISA algorithm is applied to minimize the sum of squared errors (SSE) between experimental and predicted voltage values for three commercial PEMFC models: the Horizon 500W Stack, the BCS500W Stack, and the NedStack PS6 Stack. The proposed approach achieves a minimum SSE of <span><math><mrow><mn>7.6376</mn><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>3</mn></mrow></msup></mrow></math></span>, <span><math><mrow><mn>1.2869</mn><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>2</mn></mrow></msup></mrow></math></span>, and <span><math><mrow><mn>2.2881</mn></mrow></math></span> for the three respective models. Further validation with four additional PEMFC datasets (Ballard Mark, H12-3, SR-12, and STD-4 stacks) confirms AISA's exceptional performance, achieving minimum SSE values of 9.3575E-01, 6.1870E-02, 1.0532E+00, and 2.0453E-01, respectively, with remarkable stability. Statistical validation through the Wilcoxon signed-rank test shows AISA outperforms comparison algorithms in 14 out of 18 pairwise comparisons, with no instances of being outperformed. Friedman test rankings position AISA as the top-performing algorithm across all case studies, with mean ranks of 1.17, 2.13, and 2.20, respectively. Comparative analysis with state-of-the-art metaheuristic algorithms—including the Gradient-Based Optimizer (GBO), Peafowl Optimization Algorithm (POA), and Honey Badger Algorithm (HBA)—confirms AISA's superior accuracy, stability, and computational efficiency, achieving runtime values as low as 0.5766 s. Furthermore, AISA exhibits superior convergence behavior, reaching optimal solutions with fewer function evaluations. These results highlight AISA's potential as an effective and computationally efficient tool for PEMFC parameter identification, fuel cell modeling, and performance optimization. Future research will focus on expanding the analysis to additional PEMFC models and exploring hybrid optimization strategies to further enhance accuracy and robustness.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"129 ","pages":"Pages 222-235"},"PeriodicalIF":8.1,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869976","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":"Global hydrogen trade pathways: A review of modelling advances and challenges","authors":"Jana Fakhreddine ,&nbsp;Paul E. Dodds ,&nbsp;Isabela Butnar","doi":"10.1016/j.ijhydene.2025.04.203","DOIUrl":"10.1016/j.ijhydene.2025.04.203","url":null,"abstract":"<div><div>Trade of hydrogen, as an energy commodity, would enable its widespread use in global energy systems. Hydrogen, unlike electricity, could be traded globally in its pure form or as a derivative compound (e.g. ammonia).</div><div>The development and potential size of global hydrogen trade remains uncertain due to technological, economic, infrastructural, and political complexities. We critically review how hydrogen trade models represent: (i) hydrogen supply and demand; (ii) derivatives supply and demand; (iii) hydrogen and derivative trade; and (iv) policy aspects affecting hydrogen scale-up.</div><div>While energy system models have the most detailed representation of hydrogen production and end-use demands, supply chain and techno-economic models have more detailed representations of trade supply chains of hydrogen and hydrogen derivatives. The implications of hydrogen policies have received limited consideration across all three model paradigms. Consequently, none of these approaches is yet to successfully and comprehensively represent the complexity of hydrogen and derivative trade systems.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"129 ","pages":"Pages 236-252"},"PeriodicalIF":8.1,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143870665","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":"Robust hydrogen production from NaBH4 hydrolysis using 2D/3D hierarchical hollow-architected cobalt oxide: The relationship between structural properties and catalytic activities","authors":"Tran Hai Dang ,&nbsp;Manh Dung Nguyen ,&nbsp;Duong Dinh Tuan ,&nbsp;Thi Minh Phuong Nguyen","doi":"10.1016/j.ijhydene.2025.04.278","DOIUrl":"10.1016/j.ijhydene.2025.04.278","url":null,"abstract":"<div><div>The utilization of cobalt-based catalysts for catalyzing sodium borohydride (NaBH₄) hydrolysis to produce H₂ is still receiving tremendous attention. Herein, in this work, we reported a special strategy to fabricate two peculiar cobalt oxides using Co-MOFs as the initial templates. The manipulation of chemical etching allowed the formation of large internal hollow inside these MOFs whereas their external appearances were retained, followed by the calcination step to transform them into hierarchical hollow-architected cobalt oxides. The optimized 3D-CCO and 2D-SCO showed excellent activities for catalyzing the hydrolysis of NaBH₄, in which 100 % of H₂ volume could be produced with high hydrogen production rates (HPRs) (i.e., 2689.1 mL min^-1 g^-1 and 1874 mL min^-1 g^-1) and comparatively low activation energies than many reported catalysts including precious and non-precious metal-based materials. The slightly higher activity of 3D-CCO over 2D-SCO could be attributed to its larger specific surface area, better reducible capability and abundant enriched surface oxygen vacancies. Both materials could remain their surficial structures and activities excellently over 5 consecutive cycles. The mechanism for H₂ production from NaBH₄ hydrolysis was also proposed based on the Michaelis-Menten mechanism. This work not only provides insightful information about the preparation technique for constructing hierarchical hollow-architected cobalt oxide-derived from Co-MOF but also demonstrates the relationship between the structural properties and their catalytic activities in catalyzing the hydrolysis of NaBH₄ to H₂ production.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"129 ","pages":"Pages 1-9"},"PeriodicalIF":8.1,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143860283","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 entry into carbon steel under combined condition of high-pressure hydrogen and presence of water","authors":"Klára Kuchťáková ,&nbsp;Tomáš Prošek ,&nbsp;Václav Šefl ,&nbsp;Darja Rudomilova ,&nbsp;Thierry Sturel","doi":"10.1016/j.ijhydene.2025.04.334","DOIUrl":"10.1016/j.ijhydene.2025.04.334","url":null,"abstract":"<div><div>Assessing hydrogen uptake in steel is essential for evaluating the risk of hydrogen embrittlement and the feasibility of repurposing underground gas storage facilities for hydrogen storage. However, the impact of diverse environmental conditions in these facilities on hydrogen entry remains insufficiently studied. To identify critical conditions and the underlying mechanisms of hydrogen entry, we investigated hydrogen uptake in carbon steel under near-field exposure scenarios. Steel samples were exposed to controlled environments, including immersion tests, high-pressure hydrogen exposures (0–80 bar H₂, 0–100 °C) in an autoclave, and their combination. Hydrogen uptake was quantified using thermal desorption analysis, while corrosion rates were determined through mass loss measurements. Deuterium oxide was used to distinguish hydrogen originating from corrosion and high-pressure hydrogen gas. Hydrogen uptake was low in dry gaseous hydrogen up to 80 bar and 50 °C but increased in humid hydrogen above 30 bar pressure and further in presence of bulk water solution. It was proved experimentally that the atomic hydrogen in steel originated from the gaseous phase. The <em>water-enhanced high-pressure hydrogen uptake</em> was controlled by hydrogen pressure and was little affected by temperature and environmental corrosivity. Corrosion-induced hydrogen uptake was generally low. The practical implications of these findings for the risk of steel embrittlement in gas infrastructure are discussed.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"129 ","pages":"Pages 28-37"},"PeriodicalIF":8.1,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143863335","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":"Significantly improving the performance of SrCo0·8Nb0·1Ta0·1O3-δ perovskite-based oxygen electrode on YSZ/Ni-supported YSZ|GDC solid oxide cells","authors":"Yichen Wei ,&nbsp;Weifeng Chen ,&nbsp;Xiaoyu Wang ,&nbsp;Peng Chen ,&nbsp;Wanqing Chen ,&nbsp;Zhenhui Xie ,&nbsp;Pengkai Shan ,&nbsp;Wenhuai Li ,&nbsp;Yifeng Zheng ,&nbsp;Huangang Shi ,&nbsp;Wei Wang ,&nbsp;Igor V. Alexandrov ,&nbsp;A.S. Kvyatkovskaya ,&nbsp;Meigui Xu ,&nbsp;Ran Ran ,&nbsp;Chuan Zhou ,&nbsp;Wei Zhou","doi":"10.1016/j.ijhydene.2025.04.285","DOIUrl":"10.1016/j.ijhydene.2025.04.285","url":null,"abstract":"<div><div>Solid oxide cell (SOC) is an important device for efficient hydrogen-electric energy conversion. The development of high-performance oxygen electrode remains critical challenge for advancing SOC technology. SrCo_0.8Nb_0.1Ta_0.1O_3-δ (SCNT) oxygen electrode materials has been extensively investigated and successfully applied to the solid oxide fuel cell (SOFC) with Gd_xCe_1-xO_2-δ (GDCx) electrolyte. Nevertheless, the application of SCNT to the commercial SOC via the Yttria-stabilized Zirconia (YSZ) electrolyte results in an unfavorable interfacial reaction despite the presence of a GDCx interlayer, which significantly degrades the cell performance. Herein, we modified the SCNT-based electrode by introducing the conventional electrode material La₀_·₆Sr₀_·₄Co₀_·₂Fe₀_·₈O_3-δ (LSCF) to improve electronic conductivity and structure stability. A three-phase composite electrode material SCNT-LSCF-Gd_0.1Ce₀_·₉O_1.95 (SLG) was developed and well applied to SOC. This optimizing strategy effectively inhibits interfacial Sr diffusion between the SCNT and the YSZ, which significantly improves the fuel cell performance from 720 mW cm⁻² (SCNT) to 2170 mW cm⁻² (SLG) at 750 °C. Simultaneously, the SLG-based SOC exhibits a high electrolysis current density of 2530 mA cm⁻² at 750 °C (80 % H₂O–H₂ at 1.3 V).</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"129 ","pages":"Pages 20-27"},"PeriodicalIF":8.1,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864037","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}