Energy & Fuels最新文献_第10页

Tetra-n-butylammonium Tricarboxylate Semiclathrate Hydrates as Phase Change Materials: Phase Equilibrium Relations and Memory Effect in Reformation 作为相变材料的三羧酸四正丁胺半水合物：相平衡关系及重组中的记忆效应

IF 5.2 3区工程技术

Energy & Fuels Pub Date : 2025-03-26 DOI: 10.1021/acs.energyfuels.5c0050210.1021/acs.energyfuels.5c00502

Kazuhiro Minamikawa, Jin Shimada, Takeshi Sugahara* and Takayuki Hirai,

{"title":"Tetra-n-butylammonium Tricarboxylate Semiclathrate Hydrates as Phase Change Materials: Phase Equilibrium Relations and Memory Effect in Reformation","authors":"Kazuhiro Minamikawa, Jin Shimada, Takeshi Sugahara* and Takayuki Hirai, ","doi":"10.1021/acs.energyfuels.5c0050210.1021/acs.energyfuels.5c00502","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c00502https://doi.org/10.1021/acs.energyfuels.5c00502","url":null,"abstract":"Semiclathrate hydrates (SCHs), one of the phase change materials for cold energy storage, are crystalline compounds consisting of host water molecules and appropriate guest substances. The typical guest substances of SCHs are tetra-n-butylammonium (TBA) salts. In the present study, we investigated the phase equilibrium relations of (TBA)3 tricarboxylate SCHs, where citrate (−Cit) and 1,2,3-propanetricarboxylate (−123Pro) were used as environmentally friendly tricarboxylate anions. The maximum equilibrium temperatures of (TBA)3-Cit and (TBA)3-123Pro SCHs, whose phase diagrams exhibited a congruent-type phase behavior, were 286.02 ± 0.05 and 286.34 ± 0.05 K, respectively. Their dissociation enthalpies were 186 ± 3 and 193 ± 3 kJ/kg, respectively, which are as large as that of TBA-bromide SCH that has been put to practical use in cold energy storage applications. As an index for suppressing the degree of supercooling in SCH reformation, we have focused on the memory effect. The ability to retain the memory effect in the (TBA)3-Cit and (TBA)3-123Pro SCHs was relatively large. The (TBA)3-Cit and (TBA)3-123Pro SCHs would be superior phase change materials for cold energy storage.","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 14","pages":"7104–7109 7104–7109"},"PeriodicalIF":5.2,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143806627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

THF-CH4 Hydrate Formation under Static Conditions with the Change of Temperature: Application to CH4 Storage in the Form of Gas Hydrates 随温度变化静态条件下THF-CH4水合物的形成：在天然气水合物形式CH4储存中的应用

IF 5.2 3区工程技术

Energy & Fuels Pub Date : 2025-03-25 DOI: 10.1021/acs.energyfuels.5c0050110.1021/acs.energyfuels.5c00501

Bin-Bin Ge, Dong-Liang Zhong*, Yi-Yu Lu* and Ruo-Gu Kuang,

{"title":"THF-CH4 Hydrate Formation under Static Conditions with the Change of Temperature: Application to CH4 Storage in the Form of Gas Hydrates","authors":"Bin-Bin Ge, Dong-Liang Zhong*, Yi-Yu Lu* and Ruo-Gu Kuang, ","doi":"10.1021/acs.energyfuels.5c0050110.1021/acs.energyfuels.5c00501","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c00501https://doi.org/10.1021/acs.energyfuels.5c00501","url":null,"abstract":"The hydrate-based solidified natural gas technology offers a promising approach to the storage and transportation of natural gas. A key challenge of this technology is to achieve mild hydrate formation conditions and high gas storage capacity. In this work, the effects of temperature on THF-CH4 hydrate formation under static conditions were investigated from multiple perspectives including kinetic measurement, thermal analysis, morphology observation, and in situ Raman spectroscopy. Moreover, the storage stability of THF-CH4 hydrate above the freezing point was explored. The results indicate that 288.15 K is a preferable temperature for increasing the gas uptake of THF-CH4 hydrate formation among the tested temperatures (280.15, 288.15, and 293.15 K), and the highest gas uptake of 0.0756 mol of gas/mol of water was achieved. The continued growth of cloud-like hydrates in the liquid phase was observed, which enhances CH4 diffusion for further hydrate growth. In situ Raman spectroscopy measurement revealed a two-stage growth mechanism in the formation of THF-CH4 hydrate. THF-CH4 hydrate can be stably stored at atmospheric pressure and 277.15 K, with only a 3% gas evolution from the hydrate. The results presented in this work will provide valuable insights for improving the solidified natural gas storage and transportation technology.","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 13","pages":"6232–6240 6232–6240"},"PeriodicalIF":5.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Correlation between Pore Characteristics and High-Performance Carbon Dioxide Capture of Sustainable Porous Carbon Derived from Kraft Lignin and Potassium Carbonate 硫酸盐木质素和碳酸钾可持续多孔炭的孔隙特性与高效捕集二氧化碳的关系

IF 5.2 3区工程技术

Energy & Fuels Pub Date : 2025-03-25 DOI: 10.1021/acs.energyfuels.5c0012510.1021/acs.energyfuels.5c00125

Khoa Anh Le Cao, Kiet Le Anh Cao*, Oktaviardi Bityasmawan Abdillah, Eka Lutfi Septiani, Tomoyuki Hirano, Nhan Trung Nguyen and Takashi Ogi*,

{"title":"Correlation between Pore Characteristics and High-Performance Carbon Dioxide Capture of Sustainable Porous Carbon Derived from Kraft Lignin and Potassium Carbonate","authors":"Khoa Anh Le Cao, Kiet Le Anh Cao*, Oktaviardi Bityasmawan Abdillah, Eka Lutfi Septiani, Tomoyuki Hirano, Nhan Trung Nguyen and Takashi Ogi*, ","doi":"10.1021/acs.energyfuels.5c0012510.1021/acs.energyfuels.5c00125","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c00125https://doi.org/10.1021/acs.energyfuels.5c00125","url":null,"abstract":"The development of cost-effective and efficient adsorbents for CO2 capture has gained significant interest, with biomass-derived porous carbon materials emerging as promising candidates due to their outstanding textural properties, tunable porosity, and low production cost. This study introduces for the first time a sustainable fabrication of porous carbon from Kraft lignin using K2CO3 as an environment-friendly activator via a spray drying approach and carbonization process. K2CO3 offers a low-toxic, low-corrosive, and eco-friendly alternative to KOH, making it safer for long-term equipment use and more suitable for large-scale applications. Furthermore, K2CO3 effectively creates a microporous structure for CO2 adsorption while simplifying waste management due to its benign and recyclable carbonate residues. Unlike conventional two-step activation, our approach integrates carbonization and activation into a single step, reducing production time and enhancing efficiency, making it suitable for practical applications. Porous carbon materials obtained through this novel process exhibited a CO2 adsorption capacity of 4.54 mmol/g at 298 K, comparable to those activated with KOH and outperforming many previously reported adsorbents. Additionally, the effects of K2CO3 concentration and carbonization temperature were systematically studied to optimize CO2 adsorption performance. A linear correlation analysis between pore structure parameters and CO2 captures highlighted ultramicropores as key contributors to adsorption efficiency.","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 13","pages":"6372–6387 6372–6387"},"PeriodicalIF":5.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Surface Tension Prediction of Fuel Additives Based on Machine Learning Model with Subtraction-Average-Based Optimizer Algorithm 基于减法平均优化算法的机器学习模型的燃料添加剂表面张力预测

IF 5.2 3区工程技术

Energy & Fuels Pub Date : 2025-03-25 DOI: 10.1021/acs.energyfuels.4c0640410.1021/acs.energyfuels.4c06404

Jianan Wang, Qing Duan, Xuyao Tang and Shengshan Bi*,

{"title":"Surface Tension Prediction of Fuel Additives Based on Machine Learning Model with Subtraction-Average-Based Optimizer Algorithm","authors":"Jianan Wang, Qing Duan, Xuyao Tang and Shengshan Bi*, ","doi":"10.1021/acs.energyfuels.4c0640410.1021/acs.energyfuels.4c06404","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.4c06404https://doi.org/10.1021/acs.energyfuels.4c06404","url":null,"abstract":"Fuel additives play a significant role in improving combustion efficiency and fuel quality, with their surface tension being a crucial thermophysical property that directly affects atomization and cylinder performance. To address the demand for thermophysical data of fuel additives, 574 surface tension data for 22 fuel additives were extensively collected and evaluated using empirical models. A modified Sastri-Rao model (M-Sastri-Rao model) was built with critical temperature (Tc), reduced temperature (Tr), critical pressure (pc), boiling point temperature (Tb), and acentric factor (ω) as influencing factors. The empirical models were found to have limited accuracy in predicting the surface tension. Then, a BP neural network model with the subtraction-average-based optimizer (SABO) algorithm was proposed. The results show that the SABO-BP model significantly reduced the deviation between calculated and experimental values, outperforming the previous empirical models. Various evaluation metrics were calculated for the SABO-BP model. The distribution of Bias ranged within ±5%, and the mean absolute error reached 0.165 mN·m–1. The key parameters affecting the model were identified through a SHAP interpretability analysis. The SABO-BP model can accurately provide surface tension data for applications in the design and simulation.","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 13","pages":"6195–6207 6195–6207"},"PeriodicalIF":5.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

ZTE Imaging for High-Resolution Characterization of the Shale Pore Structure and Fluid Distribution 中兴成像用于页岩孔隙结构和流体分布的高分辨率表征

IF 5.2 3区工程技术

Energy & Fuels Pub Date : 2025-03-25 DOI: 10.1021/acs.energyfuels.5c0018910.1021/acs.energyfuels.5c00189

Zhenshuo Ma, Yan Zhang* and Lizhi Xiao,

{"title":"ZTE Imaging for High-Resolution Characterization of the Shale Pore Structure and Fluid Distribution","authors":"Zhenshuo Ma, Yan Zhang* and Lizhi Xiao, ","doi":"10.1021/acs.energyfuels.5c0018910.1021/acs.energyfuels.5c00189","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c00189https://doi.org/10.1021/acs.energyfuels.5c00189","url":null,"abstract":"Shale oil is mainly stored in the pores and cracks of mud shale reservoirs, which is the mainstream oil and gas resource development in the world today. Shale is a complex porous medium with low porosity and low permeability, which results in a short relaxation time of the nuclear magnetic resonance (NMR) signal. By characterizing the pore structure and fluid distribution of shale, one can effectively guide the exploration of shale oil. However, the NMR relaxation signal of shale decays so rapidly that it cannot be effectively characterized by conventional magnetic resonance imaging (MRI) methods. Zero echo time imaging (ZTE) is often used for imaging short T2 tissues under high field conditions, where the theoretical value of the echo time (TE) of the pulse sequence is zero. In this study, the ZTE technique is implemented under low-field NMR, and the ZTE sequence is combined with relaxation NMR to obtain local information for shale samples before and after fluid self-absorption. The results show that ZTE technology can be applied to obtain high-quality shale images, and the heterogeneity of these samples was characterized. The fluid signals inside the samples were monitored, and the pore structure and fluid distribution inside the shale were characterized on macroscopic and microscopic scales. This method provides a trustworthy experimental technique for shale characterization and will benefit the oil industry.","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 13","pages":"6208–6219 6208–6219"},"PeriodicalIF":5.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Combustion and Emission Characteristics of an Ammonia–Diesel Dual-Fuel Engine under High Ammonia Substitution Ratios 氨柴油双燃料发动机在高氨替代比下的燃烧与排放特性

IF 5.2 3区工程技术

Energy & Fuels Pub Date : 2025-03-25 DOI: 10.1021/acs.energyfuels.5c0021410.1021/acs.energyfuels.5c00214

Shouzhen Zhang, Rui Yang, Qinglong Tang*, Zhijie Lv, Haifeng Liu, Zongyu Yue and Mingfa Yao,

{"title":"Combustion and Emission Characteristics of an Ammonia–Diesel Dual-Fuel Engine under High Ammonia Substitution Ratios","authors":"Shouzhen Zhang, Rui Yang, Qinglong Tang*, Zhijie Lv, Haifeng Liu, Zongyu Yue and Mingfa Yao, ","doi":"10.1021/acs.energyfuels.5c0021410.1021/acs.energyfuels.5c00214","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c00214https://doi.org/10.1021/acs.energyfuels.5c00214","url":null,"abstract":"To assess the potential for reducing carbon emissions, this study investigated the effects of fuel injection strategies, intake conditions, and engine speeds on combustion performance in ammonia–diesel dual-fuel engines. The results indicate that a high diesel injection pressure combined with advanced injection timing enhances the premixing of diesel and ammonia, shortens the ignition delay, and accelerates the combustion process, thereby improving the indicated thermal efficiency (ITE). Increasing the equivalence ratio reduces the compression pressure and temperature while decreasing the oxygen concentration around the diesel spray. This results in a longer ignition delay, a delayed combustion phase, and a combustion duration that initially shortens and then extends. Consequently, the ammonia combustion efficiency initially increases rapidly before gradually declining, while the ITE exhibits a similar trend, first increasing and then decreasing. At an ammonia energy fraction of 70%, the maximum ITE reaches 50.3%, representing an improvement of 6.7% compared with the pure diesel mode. At this point, the ammonia combustion efficiency is 94.6%, with NH3 emissions of 14.5 g/kW·h, N2O emissions of 0.17 g/kW·h, and NOx emissions of 2.9 times higher than the pure diesel mode. However, greenhouse gas (GHG) emissions are reduced by 67.5% compared with the pure diesel mode. Lower engine speeds of 1000 rpm result in lower greenhouse gas (GHG) emissions and ITE than 1500 rpm. Ammonia-fueled engines show promise in enhancing ITE and mitigating GHG emissions.","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 13","pages":"6559–6571 6559–6571"},"PeriodicalIF":5.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Synergistic Mixed Carbide Catalysts for Accelerated Aerobic Oxidative Desulfurization of Fuels 用于加速燃料好氧氧化脱硫的增效混合碳化物催化剂

IF 5.2 3区工程技术

Energy & Fuels Pub Date : 2025-03-25 DOI: 10.1021/acs.energyfuels.4c0638010.1021/acs.energyfuels.4c06380

Argam Akopyan*, Artur Aghoyan, Ekaterina A. Eseva, Maxim O. Lukashov, Mikhail M. Belov and Davit Davtyan,

{"title":"Synergistic Mixed Carbide Catalysts for Accelerated Aerobic Oxidative Desulfurization of Fuels","authors":"Argam Akopyan*, Artur Aghoyan, Ekaterina A. Eseva, Maxim O. Lukashov, Mikhail M. Belov and Davit Davtyan, ","doi":"10.1021/acs.energyfuels.4c0638010.1021/acs.energyfuels.4c06380","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.4c06380https://doi.org/10.1021/acs.energyfuels.4c06380","url":null,"abstract":"Aerobic oxidative desulfurization (AODS) is a promising technique for clean fuels production. Herein we present synergistic mixed carbide catalysts (FeMoWC) synthesized rapidly by microwave irradiation for AODS process. The combination of a ternary mixture of carbides for AODS leads to a significant increase in catalytic activity compared to single-phase, dicarbides or simply oxides of transition metals. The synthesized materials were characterized in detail by a complex of methods: XRD, HRTEM, EDX, SEM, XPS, low-temperature nitrogen adsorption/desorption, H2-temperature-programmed reduction (TPR), Raman spectroscopy. Under selected conditions (150 °C, 6 atm, 0.5 wt % catalyst dosage) complete oxidation of dibenzothiophene (DBT) was achieved in just 20 min. Under optimal conditions, the specific catalytic activity was 12.73 and 293.43 mmol g–1 h–1 for the model and real fuel, respectively. A possible mechanism for the reaction is discussed, including the activation of atmospheric oxygen with the formation of a superoxide radical, the formation of alkyl peroxides and peroxo complexes. The proposed approaches open up wide possibilities for the future development of highly efficient AODS catalysts for practical application and production of clean motor fuels.","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 13","pages":"6487–6504 6487–6504"},"PeriodicalIF":5.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Oil Recovery and Fluid Configuration in High- vs Low-Salinity Waterflooding Followed by Polymer Flooding: Pore-Scale Insights 高、低矿化度水驱和聚合物驱的采收率和流体结构：孔隙尺度研究

IF 5.2 3区工程技术

Energy & Fuels Pub Date : 2025-03-25 DOI: 10.1021/acs.energyfuels.4c0463410.1021/acs.energyfuels.4c04634

Chunyu Tong, Yongfei Yang*, Qi Zhang, Haoyun Li, Lei Zhang, Hai Sun, Junjie Zhong, Kai Zhang and Jun Yao,

{"title":"Oil Recovery and Fluid Configuration in High- vs Low-Salinity Waterflooding Followed by Polymer Flooding: Pore-Scale Insights","authors":"Chunyu Tong, Yongfei Yang*, Qi Zhang, Haoyun Li, Lei Zhang, Hai Sun, Junjie Zhong, Kai Zhang and Jun Yao, ","doi":"10.1021/acs.energyfuels.4c0463410.1021/acs.energyfuels.4c04634","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.4c04634https://doi.org/10.1021/acs.energyfuels.4c04634","url":null,"abstract":"Increasing attention is being given to low-salinity waterflooding (LSW) due to its environmental and economic advantages. While numerous scholars have researched LSW, the comprehension of its synergistic effect with other recovery techniques, such as polymer flooding, remains incomplete especially in the pore-scale remaining oil configuration. This study conducted two sets of two-phase displacement flow experiments in carbonate samples using high-salinity brine, low-salinity brine, and polymer. The high-salinity polymer flooding (HSPF) experiment served as a control to highlight the efficiency of combining low-salinity brine with polymer. A high-resolution micro-CT machine was used to acquire images of rock samples during the displacement processes. We found that the polymer after injection of the low-salinity brine was more efficient. Low-salinity brine significantly altered the wettability (from 125.13 to 104.80°) of the rock, while there was no change in the average contact angle during polymer flooding. Polymer flooding resulted in more significant ruptures of the largest clusters. Additionally, a substantial increase in the oil–water interfacial area was observed after low-salinity polymer flooding (LSPF). The synergy of LSW with polymer flooding may greatly improve oil recovery.","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 13","pages":"6164–6172 6164–6172"},"PeriodicalIF":5.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Electrospun Ni3(BO3)2–NiO Heterointerface for Boosted Overall Water Splitting and Solar-to-Hydrogen Conversion 电纺丝 Ni3(BO3)2-NiO 异质界面促进整体水分离和太阳能制氢转换

IF 5.2 3区工程技术

Energy & Fuels Pub Date : 2025-03-25 DOI: 10.1021/acs.energyfuels.5c0055910.1021/acs.energyfuels.5c00559

Mayakrishnan Raj kumar, Dhanasingh Thiruvengadam, Kaliyamoorthy Santhosh kumar, Kuppusamy Rajan, Jayaraman Jayabharathi* and Manoharan Padmavathy,

{"title":"Electrospun Ni3(BO3)2–NiO Heterointerface for Boosted Overall Water Splitting and Solar-to-Hydrogen Conversion","authors":"Mayakrishnan Raj kumar, Dhanasingh Thiruvengadam, Kaliyamoorthy Santhosh kumar, Kuppusamy Rajan, Jayaraman Jayabharathi* and Manoharan Padmavathy, ","doi":"10.1021/acs.energyfuels.5c0055910.1021/acs.energyfuels.5c00559","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c00559https://doi.org/10.1021/acs.energyfuels.5c00559","url":null,"abstract":"The development of low-cost, long-lasting, and high-performance bifunctional electrocatalysts is needed for effective electrochemical water splitting. Herein, an interface-boration engineering strategy was used to synthesize heterostructured nickel borate–nickel oxide (Ni3(BO3)2–NiO) by using the electrospinning-incineration process, which exhibited an unprecedentedly high electrocatalytic activity in alkaline media. The Ni3(BO3)2–NiO electrode showed ultralow oxygen evolution reaction and hydrogen evolution reaction overpotentials of 261 and 150 mV, respectively, to achieve 10 mA cm–2. For Ni3(BO3)2–NiO/NF-assisted alkaline as well as solar-driven electrolyzers, a low cell voltage of 1.60 V was needed to drive 10 mA cm–2 and their catalytic activity was maintained for 40 h, indicating significant potential for their use in water-splitting. Ni3(BO3)2–NiO was employed to generate H2 effectively by consuming a power of 732.33 LH2 kW h–1 lower than that of cNiO (835 LH2 kW h–1). The enhanced adsorption of oxygen-containing Lewis base intermediates on Ni3(BO3)2–NiO by Lewis acid–base interactions boosted the catalytic performance. This work provides a newer direction toward the rational engineering of the metal borate–metal oxide heterostructure with excellent intrinsic characteristics for energy applications, upscaled to industrial-scale H2 production due to production simplicity.","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 13","pages":"6605–6619 6605–6619"},"PeriodicalIF":5.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Design of New Process for Anchoring Carbon Quantum Dots onto the Cobalt Oxyhydroxide Surface for Efficient Oxygen Generation 锚定碳量子点在氧化钴表面高效产氧新工艺的设计

IF 5.2 3区工程技术

Energy & Fuels Pub Date : 2025-03-24 DOI: 10.1021/acs.energyfuels.4c0520310.1021/acs.energyfuels.4c05203

Sushma Kumari, Sunaina, Sapna Devi and Menaka Jha*,

{"title":"Design of New Process for Anchoring Carbon Quantum Dots onto the Cobalt Oxyhydroxide Surface for Efficient Oxygen Generation","authors":"Sushma Kumari,  Sunaina, Sapna Devi and Menaka Jha*, ","doi":"10.1021/acs.energyfuels.4c0520310.1021/acs.energyfuels.4c05203","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.4c05203https://doi.org/10.1021/acs.energyfuels.4c05203","url":null,"abstract":"The oxygen evolution reaction (OER) is a critical energy conversion process in water-splitting technologies, but its efficiency is hindered by high overpotential and sluggish kinetics. This study introduces a novel synthesis method for anchoring carbon quantum dots (CQDs) onto cobalt oxyhydroxide (CoOOH) to enhance the performance of the OER. The CoOOH/CQDs composite demonstrates superior electrocatalytic activity with a reduced overpotential of 370 mV at a current density of 10 mA/cm2 and a low Tafel slope of 88 mV/decade, indicating improved reaction kinetics. The integration of CQDs enhances the electronic properties of the composite, serving as both electron donors and acceptors, thereby facilitating efficient charge transfer during the OER process. Additionally, the catalyst exhibits excellent long-term stability, retaining its performance over 72 h of continuous operation. Due to its cost-effectiveness, high efficiency, and durability, the CoOOH/CQDs composite holds significant promise as a next-generation electrocatalyst for OER applications, contributing to the development of sustainable energy technologies.","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 13","pages":"6426–6437 6426–6437"},"PeriodicalIF":5.2,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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