International Journal of Hydrogen Energy最新文献_第5页

Comprehensive analysis of biomass feed power generation utilizing low-temperature LNG for hydrogen storage applications 综合分析利用低温LNG储氢应用的生物质饲料发电

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-07-31 DOI: 10.1016/j.ijhydene.2025.150760

Ibrahim B. Mansir , Zubairu Abubakar , Amjad Ali , Evgeny V. Solomin , Paul C. Okonkwo , Dahiru U. Lawal

{"title":"Comprehensive analysis of biomass feed power generation utilizing low-temperature LNG for hydrogen storage applications","authors":"Ibrahim B. Mansir , Zubairu Abubakar , Amjad Ali , Evgeny V. Solomin , Paul C. Okonkwo , Dahiru U. Lawal","doi":"10.1016/j.ijhydene.2025.150760","DOIUrl":"10.1016/j.ijhydene.2025.150760","url":null,"abstract":"<div><div>This study investigates the integration of low-temperature liquefied natural gas (LNG) with biomass-fed power generation systems, focusing on its dual role in enhancing energy conversion and supporting hydrogen storage. By leveraging the cryogenic potential of LNG, a novel hybrid configuration is proposed in which LNG cold energy recovery is thermally coupled with biomass gasification, enabling simultaneous power generation and hydrogen production. A comprehensive thermodynamic model is developed and analyzed to evaluate the system's performance. The results show that the proposed system achieves energy and exergy efficiencies of 19.8 % and 12.6 %, respectively, demonstrating a significant improvement in energy utilization compared to conventional setups. Exergy analysis identifies the gasifier as the primary source of irreversibility, contributing approximately 7391 kW to the total exergy destruction. Additionally, parametric analysis reveals a linear relationship between combustion chamber inlet temperature and both the electrical and total cost rates, highlighting economic trade-offs and optimization potential. The system also shows scalability and adaptability for future integration with renewable hydrogen infrastructure. These findings confirm the technical viability and sustainability of the proposed approach, offering a promising pathway toward low-carbon energy systems and efficient hydrogen storage solutions.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"162 ","pages":"Article 150760"},"PeriodicalIF":8.3,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144739141","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}

引用次数: 0

Interfacial atomic engineering of epitaxial core-shell heterostructures for high-performance overall water splitting and anion exchange membrane electrolyzer 高性能整体水分解阴离子交换膜电解槽外延核壳异质结构的界面原子工程

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-07-31 DOI: 10.1016/j.ijhydene.2025.150735

Xinyue Chi , Xuelin Zhang , Jinghao Zhao , Qian Wang , Weijian Yuan , Xin Li

{"title":"Interfacial atomic engineering of epitaxial core-shell heterostructures for high-performance overall water splitting and anion exchange membrane electrolyzer","authors":"Xinyue Chi , Xuelin Zhang , Jinghao Zhao , Qian Wang , Weijian Yuan , Xin Li","doi":"10.1016/j.ijhydene.2025.150735","DOIUrl":"10.1016/j.ijhydene.2025.150735","url":null,"abstract":"<div><div>Alkaline water electrolysis plays a vital role in large-scale hydrogen production. Designing effective and durable bifunctional electrocatalysts are crucial for achieving high-efficiency HER and OER process. Herein, a novel core-shell WS<sub>2</sub>@WSe<sub>2</sub> heterostructure with abundant active interfaces is designed and synthesized by in-situ van der Waals epitaxial growth. Numerous characterizations and theoretical simulations prove the successful construction of heterostructure and its advantage on optimizing the adsorption strength of hydrogen and oxygen intermediates, thereby enhancing the reaction kinetics for both HER and OER. Benefiting from the electronic modulation at catalytic interface, the heterostructure achieves a low cell voltage of 1.91 V at 100 mA cm<sup>−2</sup> with a remarkable stability in a water electrolyzer. The anion exchange membrane water electrolyzer (AEMWE) catalyzed by WS<sub>2</sub>@WSe<sub>2</sub> can achieve a high current density of 1000 mA cm<sup>−2</sup> at 2.23 V with a long-term stability over 70 h. This study offers a new perspective on designing high-activity electrocatalysts through in-situ van der Waals epitaxial growth in energy conversion applications.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"161 ","pages":"Article 150735"},"PeriodicalIF":8.3,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144750730","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}

引用次数: 0

Interface behavior and hydrogen production mechanism at GaInSn/Al interface GaInSn/Al界面的界面行为及产氢机理

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-07-31 DOI: 10.1016/j.ijhydene.2025.150759

Acong Meng , Yaoning Sun , Tianyi Zhang , Luohang Xue , Pu Wu , Chengxin Li

{"title":"Interface behavior and hydrogen production mechanism at GaInSn/Al interface","authors":"Acong Meng , Yaoning Sun , Tianyi Zhang , Luohang Xue , Pu Wu , Chengxin Li","doi":"10.1016/j.ijhydene.2025.150759","DOIUrl":"10.1016/j.ijhydene.2025.150759","url":null,"abstract":"<div><div>Liquid metal-activated Al hydrolysis for hydrogen production has garnered significant attention due to its simplicity and high efficiency. However, there remains a lack of in-depth understanding regarding the influence of liquid metal composition and its wetting properties with aluminium alloys on hydrogen release. Through multi-scale characterisation and kinetic analysis, liquid metal materials with different Ga/In/Sn mass ratios were designed. Utilizing high-speed imaging, thermal imaging, microstructural characterisation techniques, and molecular dynamics simulations, the coupling relationship between the interfacial behaviour, corrosion pathways, and hydrogen generation performance of Ga-In-Sn alloys on rolled Al surfaces was systematically investigated. Additionally, the thermodynamic and kinetic behaviour during Al water hydrogen production was explored. The results indicate that reducing the Ga content and increasing the temperature enhances wettability, thereby expanding the liquid metal-water- Al ‘three-phase interface.’ When using a 0.5 g Ga:In:Sn (3:3:1) alloy, a hydrogen generation rate of 6 mL/min was achieved. This study optimized the liquid metal material, elucidated the underlying mechanisms, and provided foundational guidance for the design of efficient hydrogen generation systems.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"162 ","pages":"Article 150759"},"PeriodicalIF":8.3,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144737994","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}

引用次数: 0

Ignition of ultra-lean and highly-diluted hydrogen-air mixtures by bursts of nanosecond repetitively pulsed discharges 用纳秒重复脉冲放电点火超贫和高度稀释的氢-空气混合物

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-07-31 DOI: 10.1016/j.ijhydene.2025.150663

Jian Y. Dou , Adrian Jano Fong , Emre Cenker , Deanna A. Lacoste

{"title":"Ignition of ultra-lean and highly-diluted hydrogen-air mixtures by bursts of nanosecond repetitively pulsed discharges","authors":"Jian Y. Dou , Adrian Jano Fong , Emre Cenker , Deanna A. Lacoste","doi":"10.1016/j.ijhydene.2025.150663","DOIUrl":"10.1016/j.ijhydene.2025.150663","url":null,"abstract":"<div><div>As a carbon-free fuel, hydrogen is being actively considered for various energy conversion systems. However, it is significantly more reactive than conventional fuels, necessitating fundamentally different combustion strategies. To mitigate its high reactivity, hydrogen can be burned in very lean or highly diluted environments. However, there are several challenges with burning very lean or highly diluted mixtures, including ignition and flame stability. Nanosecond Repetitively Pulsed (NRP) discharges have shown promising results in igniting lean or highly diluted mixtures of hydrocarbons. Yet, their efficiency on hydrogen ignition must be assessed. The main objective of this study is to comprehensively compare the ignition events of lean and nitrogen-diluted hydrogen-air mixtures by bursts of NRP discharges across a wide range of conditions. The details of energy deposition and plasma configuration are investigated by electrical measurement and optical visualization. Ignition probability, minimum ignition energy (MIE), and ignition delay are measured in a quiescent constant volume combustion chamber (CVCC). Validation experiments of the setup are conducted for well-studied conditions, i.e., for a lean hydrogen-air mixture at 0.2 equivalence ratio and atmospheric pressure, with pin-pin electrodes. The results match the MIE of capacitive spark discharge in hydrogen. Then, the pressure effect is compared with published study. The MIE results show that lean and diluted mixtures have different sensitivity to the pulse repetition frequency of the ignition sources. They also show that compared to the lean mixture, pressure has more influence on the ignition of N<sub>2</sub>-diluted mixture. The reasons for these results are analyzed with the support of Schlieren imaging.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"162 ","pages":"Article 150663"},"PeriodicalIF":8.3,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144750256","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}

引用次数: 0

Tuning Ce:La ratios for enhanced Ni exsolution and carbon control in Ce1-xLaxNiO3 perovskites for dry methane reforming Ce1-xLaxNiO3钙钛矿中Ce:La比值的调整促进了Ni的析出和碳的控制

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-07-31 DOI: 10.1016/j.ijhydene.2025.150745

Usman Zahid , Abdul Hanif Mahadi , Holilah , Didik Prasetyoko , Hasliza Bahruji

{"title":"Tuning Ce:La ratios for enhanced Ni exsolution and carbon control in Ce1-xLaxNiO3 perovskites for dry methane reforming","authors":"Usman Zahid , Abdul Hanif Mahadi , Holilah , Didik Prasetyoko , Hasliza Bahruji","doi":"10.1016/j.ijhydene.2025.150745","DOIUrl":"10.1016/j.ijhydene.2025.150745","url":null,"abstract":"<div><div>The promotional effect of La was investigated for dry reforming of methane by variation of Ce:La ratios of Ce<sub>1-x</sub>La<sub>x</sub>NiO<sub>3</sub> perovskite (x = 0.02, 0.05, 0.08 and 0.10). Characterization and DRIFTS/Mass Spec analysis elucidate the role of La in reducing the temperature for CH<sub>4</sub> and CO<sub>2</sub> activation and for carbon formation. La enhanced Ce<sup>4+/</sup>Ce<sup>3+</sup> redox transition and oxygen vacancies in Ce<sub>1-x</sub>La<sub>x</sub>NiO<sub>3</sub> to achieve a higher CO<sub>2</sub> and CH<sub>4</sub> conversion than the non-substituted CeNiO<sub>3</sub>. Low La substitution (x = 0.02) formed socketed Ni nanoparticles (∼2–5 nm), initiating methane decomposition to H<sub>2</sub> at temperatures below 350 °C. However, the Ni nanoparticles caused disproportional CH<sub>4</sub> and CO<sub>2</sub> decomposition, deviating the H<sub>2</sub>/CO ratio from one and tip-growing the carbon into nanotubes after 24 h reaction at 600 °C. At high La substitution (x = 0.10), Ni was observed as large nanoparticles (∼10–12 nm), which reduced CH<sub>4</sub> conversion to achieve a balanced CO<sub>2</sub> and CH<sub>4</sub> conversion and led to the formation of unstructured reactive carbon after 24 h of reaction.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"162 ","pages":"Article 150745"},"PeriodicalIF":8.3,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144750427","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}

引用次数: 0

Fostering energy innovation: Integrating working capital management strategies for sustainability in hydrogen entrepreneurship industries ecosystem 促进能源创新：整合营运资本管理战略，实现氢创业产业生态系统的可持续性

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-07-31 DOI: 10.1016/j.ijhydene.2025.150393

Song Mujie , Shuangzhou Liu

{"title":"Fostering energy innovation: Integrating working capital management strategies for sustainability in hydrogen entrepreneurship industries ecosystem","authors":"Song Mujie , Shuangzhou Liu","doi":"10.1016/j.ijhydene.2025.150393","DOIUrl":"10.1016/j.ijhydene.2025.150393","url":null,"abstract":"<div><div>Entrepreneurship industrial ecosystem has a pvitol role in energy industry development of China. This study examines the integration of bioremediation for hydrocarbon removal and sustainable development with energy innovation strategies, emphasising the role of working capital management in hydrogen industries in achieving effective hydrocarbon degradation through entrepreneurship ecosystem. Focusing on the period from 2001 to 2023, the research employs a comprehensive econometric framework, including correlation analysis, quantile slope equality tests (QSE), quantile unit root estimation, Gaussian quantile estimation, and the Quantile Auto-Regressive Distributed Lag (QARDL) model, complemented by robustness checks. The findings have demonstrated that advancements in hydrogen-based energy innovation—particularly in efficiency improvement, energy capacity expansion, and R&D investment—have significantly enhanced the effectiveness of hydrocarbon bioremediation processes. Simultaneously, efficient working capital management is a key enabler of technological innovation and financial resilience, reinforcing the sustainability of hydrogen firms engaged in environmental remediation. By bridging technological, economic, and ecological dimensions, this study contributes new insights into how hydrogen industries can support large-scale hydrocarbon degradation while advancing sustainable development goals. The results offer valuable implications for policymakers, financial institutions, and industry leaders seeking to enhance the role of hydrogen in low-carbon transitions and environmental restoration.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"160 ","pages":"Article 150393"},"PeriodicalIF":8.3,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144738415","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}

引用次数: 0

Assessment of End-of-Life solar photovoltaic module recycling techniques using q-Rung Orthopair fuzzy information measure induced group decision-making 基于q-Rung Orthopair模糊信息测度的太阳能光伏组件报废回收技术评价

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-07-31 DOI: 10.1016/j.ijhydene.2025.150610

Raili Basu, Sayanta Chakraborty, Apu Kumar Saha

{"title":"Assessment of End-of-Life solar photovoltaic module recycling techniques using q-Rung Orthopair fuzzy information measure induced group decision-making","authors":"Raili Basu, Sayanta Chakraborty, Apu Kumar Saha","doi":"10.1016/j.ijhydene.2025.150610","DOIUrl":"10.1016/j.ijhydene.2025.150610","url":null,"abstract":"<div><div>With the quick spread of solar photovoltaic technology worldwide, it has become an inevitable issue to dispose of or recycle used solar photovoltaic modules (SPVMs). The growing global role of SPVM necessitates the understanding of End-of-Life (EoL) management with the recycling, potentially recovering materials and adding economic benefits to installed panels. Using the idea of multi-criteria group decision-making (MCGDM), the current work attempts to determine the best recycling technology for EoL SPVMs under q-Rung orthopair fuzzy environment (q-ROFE). To carry out this research, initially, a novel q-ROF score function (q-ROFSF) has been developed to overcome the limitations of the existing score functions (SFs). The salient properties of the proposed SF have been investigated theoretically and its superiority has been validated through numerical examples. With the aid of the proposed novel SF and q-rung orthopair fuzzy weighted geometric (q-ROFWG) operator, the Stepwise Additive Ratio Analysis (SWARA) method has been extended under q-ROFE to prioritize various influential parameters involved in the decision-making process. Secondly, to rank the alternatives, a novel q-rung orthopair fuzzy (q-ROF) distance measure (DM) based ranking method has been developed with the aid of a novel q-ROFDM and proposed novel SF. The proposed DM satisfies all its axiomatic properties, along with some additional properties. The proposed ‘ranking’ method yields solution based on its distance from the ideal solution. As per performance, Chemical Etching has emerged as the best cost-friendly and eco-friendly alternative for SPVM recycling (SPVMR) with the highest material recovery.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"161 ","pages":"Article 150610"},"PeriodicalIF":8.3,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144738643","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}

引用次数: 0

The effect of doping on hydrogen storage in alkali-adatoms SnC nanosheet: A DFT study 掺杂对碱原子SnC纳米片储氢性能的影响：DFT研究

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-07-31 DOI: 10.1016/j.ijhydene.2025.150709

Ángel R. Montoya-García , Brandom J. Cid , Lucia G. Arellano , Álvaro Miranda , Fernando Salazar , Luis A. Pérez , Miguel Cruz-Irisson

{"title":"The effect of doping on hydrogen storage in alkali-adatoms SnC nanosheet: A DFT study","authors":"Ángel R. Montoya-García , Brandom J. Cid , Lucia G. Arellano , Álvaro Miranda , Fernando Salazar , Luis A. Pérez , Miguel Cruz-Irisson","doi":"10.1016/j.ijhydene.2025.150709","DOIUrl":"10.1016/j.ijhydene.2025.150709","url":null,"abstract":"<div><div>In this study, we investigated the hydrogen storage potential of two-dimensional tin carbide (2DSnC) nanosheets modified by defects such as doping and functionalization. Specifically, the hydrogen storage capacity of 2DSnC doped with boron, aluminum, and gallium atoms and decorated with alkali metals—lithium, sodium, and potassium—was evaluated using Density Functional Theory (DFT). Our results theoretically demonstrate that substitutional doping at Sn sites yields more stable nanosheets than substitution at C sites. Furthermore, alkali-metal adatoms preferentially adsorb at the hollow site above the center of the hexagonal lattice, particularly where the dopant atom is located. The highest hydrogen storage capacity was achieved for boron-doped 2DSnC decorated with potassium, where up to six hydrogen molecules were physisorbed per K adatom. This was followed by five hydrogen molecules on Na and three on Li. These findings suggest that boron-doped 2DSnC nanosheets decorated with alkali metals may serve as promising candidates for solid-state hydrogen storage applications.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"161 ","pages":"Article 150709"},"PeriodicalIF":8.3,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144738645","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}

引用次数: 0

New insights into the step effect in NiS2 electrodeposition: From in-situ growth to enhanced hydrogen evolution reaction NiS2电沉积中台阶效应的新认识：从原位生长到增强析氢反应

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-07-31 DOI: 10.1016/j.ijhydene.2025.150757

Wissem Boughouiche , Hamza Belhadj , Nada Boumazza , Yazid Messaoudi , Ilyas Belkhettab , Mohamed Khelladi , Amor Azizi

{"title":"New insights into the step effect in NiS2 electrodeposition: From in-situ growth to enhanced hydrogen evolution reaction","authors":"Wissem Boughouiche , Hamza Belhadj , Nada Boumazza , Yazid Messaoudi , Ilyas Belkhettab , Mohamed Khelladi , Amor Azizi","doi":"10.1016/j.ijhydene.2025.150757","DOIUrl":"10.1016/j.ijhydene.2025.150757","url":null,"abstract":"<div><div>The in-situ effect of one-step and two-step electrodeposition strategies on NiS<sub>2</sub> electrode fabrication at various applied current densities were systematically investigated for the hydrogen evolution reaction (HER). The influence of current density was found to play a significant role in the growth mechanism during electrodeposition process. Due to rapid nucleation at high current density, the NiS<sub>2</sub> electrode deposited via one-step process at −150 mA cm<sup>−2</sup> exhibited superior HER performance with a low overpotential of 310 mV at 10 mA cm<sup>−2</sup> compared to electrodes deposited at −100 mA cm<sup>−2</sup> and -50 mA cm<sup>−2</sup> respectively. Interestingly, when the NiS<sub>2</sub> electrode was fabricated using a two-step electrodeposition process, the HER electrocatalytic activity was significantly enhanced, achieving a lower overpotential of 250 mV at −10 mA cm<sup>−2</sup> compared to the one-step technique. This outstanding performance, along with an exceptional long term-stability of the NiS<sub>2</sub> electrode can be attributed to its unique surface characteristics, including a well-ordered spherical morphology and high electrical conductivity. In particular, the second deposition step induced a substantial in-situ enhancement in the intrinsic electronic structure, leading to a redistribution of the surface morphology as evidenced by shifts in XPS binding energy. These in-situ reconstructions at the NiS<sub>2</sub> interface facilitated electrolyte penetration, increased the abundant of exposed active sites, and significantly improved HER electrocatalytic performance. These findings highlight the critical role of electrodeposition step strategies, providing new insight into understanding and optimizing efficient electrocatalysts for HER in alkaline medium.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"162 ","pages":"Article 150757"},"PeriodicalIF":8.3,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144739138","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}

引用次数: 0

Reducing emissions and fuel consumption in supersonic aviation with ammonia hybrid engines 用氨混合动力发动机减少超音速航空的排放和燃料消耗

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-07-31 DOI: 10.1016/j.ijhydene.2025.150540

Muhammad Mueed Khan , Shahzad Bashir , Muhammad Waleed Khan , Olabode Ajenifujah

{"title":"Reducing emissions and fuel consumption in supersonic aviation with ammonia hybrid engines","authors":"Muhammad Mueed Khan , Shahzad Bashir , Muhammad Waleed Khan , Olabode Ajenifujah","doi":"10.1016/j.ijhydene.2025.150540","DOIUrl":"10.1016/j.ijhydene.2025.150540","url":null,"abstract":"<div><div>Ammonia, emerging as a zero-carbon aviation fuel, presents potential for high-energy hydrogen storage and rapid conversion medium to electricity. Recent electrification efforts in the aviation industry further reinforces its importance as electricity direct storage has challenges especially in terms of their low energy density and maximum attainable airspeed with motor-propellers. This study explores a supersonic hybrid electric engine for medium-haul airlines, combining ammonia-powered turbofan with a proton exchange membrane fuel cell. Mathematical modeling helps generate parametric dataset across different flight phases which is then used for training a physics-informed artificial neural network to identify optimum design points in terms of safety, efficiency and emissions. The hybrid engine outperforms legacy aircraft like the Concorde and subsonic turbofans fueled with either ammonia or fossil kerosene; achieving around 18% reduction in specific fuel consumption and about 31% lower NOx pollutants. Moreover, maintaining high fuel cell power draw-down towards the fan for propulsion also helps achieve greater overall efficiencies than non-hybrids and further ensures that the engine core has enough residual power to operate safely, even after loss of single engine core during flight. Additionally, contrail analysis reveals that the ammonia-fueled PEMFC hybrid forms up to 70% fewer ice crystals than hydrocarbon-based systems, potentially lowering climate forcing of resulting contrails. However, due to higher water vapor emission indices and lower exhaust temperatures, contrails from the hybrid engine can form at ambient temperatures up to 20–30 K warmer than those required by conventional engine configurations.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"162 ","pages":"Article 150540"},"PeriodicalIF":8.3,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144739140","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}

引用次数: 0