Fuel最新文献

{"title":"Mechanical property weakening mechanisms and ensemble assessment during coalbed carbon sequestration","authors":"Peitao Shi ,&nbsp;Jixiong Zhang ,&nbsp;Baiyi Li ,&nbsp;Hao Yan ,&nbsp;Yuyang Xia","doi":"10.1016/j.fuel.2025.135197","DOIUrl":"10.1016/j.fuel.2025.135197","url":null,"abstract":"<div><div>Carbon sequestration in deep, unexploitable coal seams is an effective method for carbon emission reduction. However, the impact of CO₂ on coal’s mechanical properties is critical for the stability of coal bed carbon sequestration. This study examines the effects of moisture content, saturation medium, saturation pressure, and saturation time on the mechanical properties of coal through saturation experiments. The mechanisms by which the coal matrix is weakened by CO₂ and water are revealed. Furthermore, to assess the impact of high-dimensional factors on mechanical properties, an ensemble perturbation model (EP-SVR) is developed to evaluate the mechanical properties of coal after carbon sequestration. The study also investigates the impact of iterations and perturbation level on the performance of EP-SVR. The model systematically evaluated the effects of eight factors, including coal rank, sample size, moisture content, saturation medium, saturation time, saturation pressure, saturation temperature, and test loading rate, on the mechanical performance. The results indicate that CO₂ saturation in multiple phases weakens the mechanical properties of coal. The weakening mechanisms include the expansion of the coal matrix, erosion of organic and mineral components, an increase in porosity, and the formation of micro-cracks. This model can adaptively assess the changes in the mechanical properties of CO₂-saturated coal at different stages. Compared with other models, the EP-SVR has the advantage of higher tolerance to adversarial data by dynamically training a new adaptive decision function through an iterative process, thus enhancing the model’s robustness to diverse data. This study provides insights into the safety prediction of coal carbon sequestration.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"395 ","pages":"Article 135197"},"PeriodicalIF":6.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stabilization and emissions characteristics of CH4–H2 blends in a premixed jet stabilized combustor","authors":"Rishikesh Sampat,&nbsp;Niek Goselink,&nbsp;Kaushal Dave,&nbsp;Ferry Schrijer,&nbsp;Arvind Gangoli Rao","doi":"10.1016/j.fuel.2025.135059","DOIUrl":"10.1016/j.fuel.2025.135059","url":null,"abstract":"<div><div>Low emissions and fuel flexibility are two important criteria required for gas turbine combustors to facilitate the energy transition to low-carbon fuels for propulsion and power applications. A jet-stabilized combustor, having both these characteristics, was operated with CH₄–H₂ fuel mixtures with H₂ varying from 0 to 100 % and with varying equivalence ratios (<span><math><mi>ϕ</mi></math></span>). Comprehensive measurements were carried out of the velocity field using Particle Image Velocimetry (PIV), temperature and gas composition by traversing probes in the chamber, and flame topology using chemiluminescence imaging. The flow field in this combustor consists of a jet that undergoes recirculation, generating Central and Peripheral Recirculation Zones (CRZ and PRZ). The recirculation ratio in the PRZ is found to be twice that of the CRZ. Increasing H₂ % for the same <span><math><mi>ϕ</mi></math></span> leads to higher NO_<em>x</em>. Ultra-low <span><math><mi>ϕ</mi></math></span> flames could be stabilized only at H<span><math><msub><mspace></mspace><mn>2</mn></msub><mo>≥</mo></math></span>50 %, which in turn leads to low NO_<em>x</em> due to low adiabatic flame temperatures. The combination of temperature, gas composition (CO/NO), and chemiluminescence images is used to identify the extent and location of the reaction zone. Distributed reaction zones, stabilizing at around 30 % of the length of the chamber, are achieved at lean conditions, whereas an increase in H₂ % makes the reaction zone more compact and shifts upstream towards the burner head. Flame kernels are extracted from the instantaneous chemiluminescence images, and probability distribution functions for their aspect ratio and axial location are constructed. It is seen that reducing <span><math><mi>ϕ</mi></math></span> leads to low aspect ratio kernels that tend to occur further downstream, whereas increasing H₂ % leads to higher aspect ratio kernels, stabilizing upstream. These flame kernel statistics are also used to identify ignition modes (autoignition/flame propagation) for varying fuel H₂ % and inlet <span><math><mi>ϕ</mi></math></span> based on a hypothesis of flame stabilization mechanisms.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"395 ","pages":"Article 135059"},"PeriodicalIF":6.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Theoretical investigation of CO2/N2-enhanced coalbed methane recovery in coal-derived asphaltenes","authors":"Abdolhalim Torrik ,&nbsp;Mozafar Rezaee ,&nbsp;Farshad Mirzaee Valadi","doi":"10.1016/j.fuel.2025.134693","DOIUrl":"10.1016/j.fuel.2025.134693","url":null,"abstract":"<div><div>The global energy supply relies heavily on fossil fuels, contributing significantly to greenhouse gas emissions and climate change. Despite efforts to reduce CO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> emissions through renewable energy, substantial amounts continue to be released. Coal bed methane recovery (CBM) presents opportunities in this regard, necessitating a thorough understanding to minimize associated risks. To gain better insight into N<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>-ECBM and CO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>-ECBM processes, an asphaltene model was selected, heteroatoms (CH<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>, NH, CO, S) were incorporated into it, and the adsorption of CO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>, CH<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span>, and N<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> was investigated. We utilized grand canonical Monte Carlo (GCMC), molecular dynamics (MD), and density functional theory (DFT) for this purpose. The results show that CO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> has the highest adsorption energy, with values of up to −12 kJ/mol on asphaltene models, compared to −8 kJ/mol for CH<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span> and −7 kJ/mol for N<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>. Temperature was found to reduce adsorption capacity, while increased pressure positively affected gas uptake, agreeing with experiments. The isosteric heats of adsorption for all gases were below 10 kJ/mol, indicating a physisorption process. Additionally, the self-diffusion coefficient increases with temperature in accordance with experiments, with CO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> displaying the lowest value among the studied gases, suggesting a stronger affinity to the asphaltene surface. DFT analysis showed that the adsorption of gases on asphaltene molecules was a physical process (van der Waals interaction). These findings highlight the suitability of asphaltene structures for CO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>-ECBM, where CO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> can be used to displace methane in coal seams, aiding both methane recovery and greenhouse gas mitigation. The strong interaction between CO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> and asphaltene suggests that asphaltene-based adsorbents could be developed for more efficient carbon capture and storage technologies.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"395 ","pages":"Article 134693"},"PeriodicalIF":6.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 novel methodology to predict misfiring in a compression ignition engine during cold start","authors":"Manan J. Trivedi,&nbsp;Sandipan Ghosh,&nbsp;Prasad D. Raut,&nbsp;Samy Alkhayat,&nbsp;Naeim A. Henein","doi":"10.1016/j.fuel.2025.135039","DOIUrl":"10.1016/j.fuel.2025.135039","url":null,"abstract":"<div><div>To make passenger cars environmentally friendly, engines in them may be replaced by battery packs in the future. However, for heavy-duty applications, replacing Compression Ignition (CI) engines with battery packs is currently not feasible. Consequently, CI engines will be powered by low-carbon intensity fuels and remain in use for many years. That said, during cold start, CI engines are prone to autoignition failure, resulting in misfire. Even if auto-ignition occurs, the combustion may fail to sustain, and a CI engine may still misfire.</div><div>To address this, a novel methodology was developed to evaluate whether an injection strategy is favorable for sustaining combustion. This methodology is based on 3-Dimentional Computational Fluid Dynamics (3D CFD) simulations of fuel spray and does not require chemical kinetic calculations. As a result, its key advantage lies in its computational cost-effectiveness. However, this methodology is semi-empirical, as it relies on insights from cold starting experiments conducted in a VolksWagen (VW) 2.0-L, 4-cylinder CI engine. In these experiments, numerous split injection strategies were tested while glow plugs were inactive. Although the methodology was formulated using ultra-low-sulfur diesel, it can be adapted for low-carbon-intensity fuels—such as renewable diesel, hydrogen, and biodiesel—that are likely to power CI engines in the future.</div><div>Experiments reveal that the engine misfired when the fuel–air mixture from the pilot injection is too lean or did not have enough time to auto-ignite before the main fuel–air mixture merged with it. Therefore, the methodology evaluates whether the equivalence ratio of the pilot fuel–air mixture and a metric indicating the time it requires to auto-ignite are above certain thresholds determined in this work.</div><div>Lastly, the methodology was observed to fall short when glow plugs were active in a cold-starting experiment. Hence, a modification to the methodology is proposed that would be effective whenever glow plugs are active.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"395 ","pages":"Article 135039"},"PeriodicalIF":6.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 two-stage advanced turbocharging systems for medium duty hydrogen engine conversion: A comprehensive 1D engine modelling approach","authors":"José Ramón Serrano,&nbsp;Joaquín De la Morena,&nbsp;Alejandro Gómez-Vilanova,&nbsp;David González-Domínguez","doi":"10.1016/j.fuel.2025.135152","DOIUrl":"10.1016/j.fuel.2025.135152","url":null,"abstract":"<div><div>This paper explores the potential of retrofitting traditional fuel engines to hydrogen operation, leveraging their advantage for greenhouse gas emission reduction. Specifically, the work focuses on a 3-litre diesel automotive application engine equipped with a two-stage turbocharging system. Such architecture is particularly interesting for hydrogen applications since it can potentially maintain the lean mixtures typically used on hydrogen engines with a reduced deterioration in performance.</div><div>First, an extensive experimental campaign on the original diesel engine is used to develop and validate a comprehensive one-dimensional engine model. Subsequently, the developed model is adapted from the computational point of view to evaluate hydrogen operation, including combustion profiles extrapolated from existing literature combined with a predictive sub-model to evaluate knocking limitations as a function of the boost pressure level. Then, the turbocharging system management is optimised under different assumptions. Afterwards, the full-load performance is compared for direct and indirect injection and different dilution levels.</div><div>According to the simulation results, the hydrogen engine can achieve over 80% of the original diesel engine’s torque output, successfully meeting the target boost pressure, thanks to the versatility of the dual-stage turbocharging system. This research advances hydrogen engine conversion technology, paving the way for cleaner and more efficient transportation systems.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"395 ","pages":"Article 135152"},"PeriodicalIF":6.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Insight into the effect of ammonia doping on the methane jet flame","authors":"Bipro Gain ,&nbsp;Muhammad Bilal ,&nbsp;Yun-Fan Wang ,&nbsp;Samuel Daniel ,&nbsp;Wang Du ,&nbsp;Ahmed E. Mansy ,&nbsp;Kai-Ru Jin ,&nbsp;Zhen-Yu Tian","doi":"10.1016/j.fuel.2025.135140","DOIUrl":"10.1016/j.fuel.2025.135140","url":null,"abstract":"<div><div>Ammonia (NH₃) is a carbon-free and high-hydrogen fuel with ease of storage and transport having low energy density, making it a promising alternative fuel. The combustion characteristics of NH₃ differ significantly from those of conventional fossil fuels, presenting significant barriers to its applications. Here, the effect of combustion characteristics of NH₃ doping with hydrocarbon fuel is investigated by employing Particle image velocimetry (PIV) experiments and CFD Simulation across various ratios of NH₃ doped in the premixed jet flame. The experimental findings indicate that NH₃ doping leads to a significant increase in flame height (from 5.15 cm to 10.51 cm with NH₃ doping), while the maximum flame temperature decreases with NH₃ doping (1972 °C to 1895 °C). Nevertheless, the flame temperature increases with flame height increase (1372 °C to 1537 °C) due to the decomposition of NH₃ into H₂, which combusts rapidly and releases additional heat, accompanied by a broader flame structure and more consistent heat distribution. This altered combustion characteristics and enhanced reactivity of the NH₃ hydrocarbon mixture which improves combustion efficiency and heat transfer within the flame zone. Additionally, the overall flame velocity decreased with NH₃ doping (7.13 m/s to 6.58 m/s), and higher velocities were observed in the upper flame regions due to an increased flame height. These results reveal that NH₃ doping enhances flame stability, facilitates complete combustion, and amplifies the understanding of mechanisms involved in NH₃ combustion thereby offering a pathway towards cleaner combustion technologies. Consequently, NH₃ can be utilized more efficiently in practical combustion devices, including internal combustion engines, aero engines, land-based gas turbines, furnaces, and boilers.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"395 ","pages":"Article 135140"},"PeriodicalIF":6.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Construction of NiAl-LDH/Mn0.5Cd0.5S heterostructure for enhancing photocatalytic H2 evolution","authors":"Yunxia Luo ,&nbsp;Yongping Luo ,&nbsp;Chao Liu ,&nbsp;Wenzhen Qin ,&nbsp;Yuhua Dai ,&nbsp;Yu Xie ,&nbsp;Xiu Wang ,&nbsp;Jiansheng Zhang","doi":"10.1016/j.fuel.2025.135184","DOIUrl":"10.1016/j.fuel.2025.135184","url":null,"abstract":"<div><div>Plumbing and devising photocatalysts for high photocatalytic hydrogen production is still a major challenge. In this study, the NiAl-LDH/Mn_0.5Cd_0.5S heterostructure composites are prepared by hydrothermal method. When the loading weight of NiAl-LDH is 20 wt%, NiAl-LDH/Mn_0.5Cd_0.5S composites has the excellent ability to separate photogenerated charge carriers under visible light. Meantime, the NiAl-LDH/Mn_0.5Cd_0.5S composites possess prominent photocatalytic hydrogen production rates of 55.9 mmol·h⁻¹·g⁻¹, which is 7.5 times of pure Mn_0.5Cd_0.5S and 25 times of NiAl-LDH. According to the data, the photocatalytic mechanism of electron-holes movement over NiAl-LDH/Mn_0.5Cd_0.5S composites is unlocked. This work offers a reference for designing novel heterojunction for photocatalytic production of H₂.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"395 ","pages":"Article 135184"},"PeriodicalIF":6.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 flame evolution and kinetics mechanism of H2-Air mixture with C3H9O3P-H2O fog addition","authors":"Yuanchen Xia,&nbsp;Bin Zhang,&nbsp;Boqiao Wang,&nbsp;Ke Ye,&nbsp;Siqi Zhang,&nbsp;Wanying Yue,&nbsp;Zhuohui Liang,&nbsp;Jinnan Zhang,&nbsp;Yulong Ji","doi":"10.1016/j.fuel.2025.135017","DOIUrl":"10.1016/j.fuel.2025.135017","url":null,"abstract":"<div><div>Understanding the hydrogen explosion characteristics with inhibitors addition is indispensable for ensuring the safe application of hydrogen fuels. Influences of C₃H₉O₃P-H₂O fog addition on flame evolution and kinetics mechanism of hydrogen-air explosions is investigated with 3.4 L rectangular chamber and reaction kinetics model. The results demonstrate that the C₃H₉O₃P-H₂O fog promotes thermal-diffusion instability of the flame, resulting in the formation of cellular structures on the flame front. And the fog suppresses the formation of tulip flames and form a corrugated flame. Additionally, as the equivalence ratio increases, the attenuation effect of the C₃H₉O₃P-H₂O fog on explosion overpressure gradually decreases. The order of effectiveness in explosion overpressure reduction with fog addition position is P3 &gt; P2 &gt; P1. The influence of the C₃H₉O₃P-H₂O fog on hydrogen explosion overpressure is a coupled effect, involving both the expansion of flame surface area (Enhancement factor <em>F_e</em>∈ (1, +∞)) and the reduction of laminar burning velocity (Inhibition factor <em>F_i</em>∈ (0, 0.24)). From chemical kinetics perspective, C₃H₉O₃P-H₂O fog reacted and significantly consumed H, O, and OH radicals, with the consumption rate of radicals reaching at least 83 %. The main phosphorus-containing radicals, PO₂, HOPO, and HOPO₂, contributed to radical consumption through chain termination reactions (R12 ∼ R18), continuously consuming H, O, and OH radicals by forming stable compounds such as H₂O and H₂.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"395 ","pages":"Article 135017"},"PeriodicalIF":6.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The autoignition characteristics of oxygen-in-ammonia blending fuel turbulent jet flame into high temperature co-flow","authors":"Meng Ji ,&nbsp;Zhijun Wu ,&nbsp;Zhe Kang ,&nbsp;Quanbo Shang ,&nbsp;Guanyu Zhang ,&nbsp;Chaoqun Hu ,&nbsp;Lezhong Fu ,&nbsp;Yang Yu ,&nbsp;Jun Deng ,&nbsp;Liguang Li","doi":"10.1016/j.fuel.2025.135170","DOIUrl":"10.1016/j.fuel.2025.135170","url":null,"abstract":"<div><div>Due to stringent emission regulations and global carbon neutrality proposal, ammonia, as one of promising zero-carbon emission fuel, holds significant potential for applications in transportation especially internal combustion engines. Oxygen-enriched combustion, an effective flame enhancement method for ammonia combustion, need a further investigation particularly into a high temperature co-flow. This study focuses on the oxygen combustion enhancement effect on autoignition characteristics of ammonia under varying combustion conditions, including co-flow temperatures, co-flow velocities, injection pressures and oxygen coefficients. The minimum autoignition required temperature to form a stable flame is 1123 K. With co-flow temperature increases, flame length and area increase. But with the excess oxygen coefficient increases, flame morphology decreases. The lifted height and ignition delay time, as key combustion parameters of turbulent jet flames, were analyzed to evaluate autoignition characteristics and combustion stability. As excess oxygen coefficient increases, ignition delay time initially decreases and then increases. The minimal flame ignition delay time occurs at an excess oxygen coefficient of 0.8. Additionally, the lifted height gradually decreases with an augment in the co-flow temperature. The temperature sensitivity on lifted height decline when co-flow temperature reaches a critical co-flow temperature (1173 K). The large-scale structure model has a well match to predict flame lifted height. Consistent with the variations of ignition delay time, smallest fluctuation in lifted height over time and the most stable flame state are achieved when excess oxygen coefficient is 0.8.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"395 ","pages":"Article 135170"},"PeriodicalIF":6.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Controlled designing of NiFeP@Ni-Se arrays as efficient and robust bifunctional electrocatalyst for hydrogen production coupled via urea oxidation","authors":"Khursheed Muzammil ,&nbsp;Farag M.A. Altalbawy ,&nbsp;Dharmesh Sur ,&nbsp;Suhas Ballal ,&nbsp;Jacquline Tham ,&nbsp;Ambati Vijay Kumar ,&nbsp;Shoira Bobonazarovna Formanova ,&nbsp;Iman Samir Alalaq ,&nbsp;Forat H. Alsultany ,&nbsp;Salah Hassan Zain Al-Abdeen ,&nbsp;Marwa Alhedrawe","doi":"10.1016/j.fuel.2025.135166","DOIUrl":"10.1016/j.fuel.2025.135166","url":null,"abstract":"<div><div>Using the urea oxidation reaction (UOR) in place of the oxygen evolution reaction (OER) can enhance the efficiency of hydrogen production to a more viable level. As a result, it is essential to investigate effective and stable electrocatalysts for both the hydrogen evolution reaction (HER) and UOR. In this study, a three-dimensional Ni-Fe-P@Ni-Se nanosheet structure was developed to enhance the electrocatalytic performance for energy-efficient hydrogen production aided by the UOR, employing a simple and rapid electrodeposition method. Leveraging unique properties like a high active surface area, rapid bubble detachment from the surface, and complete surface wettability by the electrolyte, the Ni-Fe-P@Ni-Se electrode deposited at 15 mA cm⁻² requires a potential of −83 mV vs RHE for the HER process and 1.304 V vs RHE for the UOR process for achieving the current density of 10 mA cm⁻². Furthermore, when used as a bifunctional electrode, the Ni-Fe-P@Ni-Se electrode required a cell voltage of 1.337 V at a current density of 10 mA cm⁻² for the HER-UOR (overall urea electrolysis) process. These findings highlight the effectiveness of utilizing the UOR as an alternative to the OER. Overall, this study offers a new approach for the rational design of bifunctional electrocatalysts aimed at large-scale, energy-efficient hydrogen production.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"394 ","pages":"Article 135166"},"PeriodicalIF":6.7,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}