International Journal of Hydrogen Energy最新文献_第2页

Ce-doped NiOOH coupled with Ni nanocrystals endowing high-current-density water oxidation on iron-free catalysts 掺杂铈的NiOOH与Ni纳米晶耦合，在无铁催化剂上实现高电流密度水氧化

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-10-03 DOI: 10.1016/j.ijhydene.2025.151643

Mingzhe Li , Yunlong Wang , Xin Zhang , Lei Zhou , Fengchun Zheng , Kepi Chen , Nian Ran , Yuzhen Lv , Wei Zhou

{"title":"Ce-doped NiOOH coupled with Ni nanocrystals endowing high-current-density water oxidation on iron-free catalysts","authors":"Mingzhe Li , Yunlong Wang , Xin Zhang , Lei Zhou , Fengchun Zheng , Kepi Chen , Nian Ran , Yuzhen Lv , Wei Zhou","doi":"10.1016/j.ijhydene.2025.151643","DOIUrl":"10.1016/j.ijhydene.2025.151643","url":null,"abstract":"<div><div>Developing iron-free transition-metal based catalysts to overcome ion-leaching degradation is still a critical challenge due to their inherent low activity and poor electron transfer characteristics for oxygen evolution reaction (OER). Herein, an iron-free catalytic material integrating amorphous Ce-doped NiOOH with Ni nanocrystals was synthesized via a one-step electrodeposition method, achieving scalable fabrication of a uniform anode over 600 cm<sup>2</sup>. It shows remarkably low overpotentials of 190 mV and 332 mV to achieve 10 and 1000 mA cm<sup>−2</sup> in 1 M KOH, respectively. Moreover, it maintains 98.7 % activity retention after 1000 h of continuous operation at 1000 mA cm<sup>−2</sup>. XPS, XANES, in-situ Raman spectroscopy and density functional theory (DFT) calculations demonstrate that Ni nanocrystals significantly enhance the interfacial and bulk charge transport in NiOOH, while Ce doping substantially promotes both the pre-oxidation process and OER kinetics. This work provides insights for designing iron-free catalytic materials with high alkaline OER performance.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"182 ","pages":"Article 151643"},"PeriodicalIF":8.3,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145204459","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

Hydrogen-rich syngas production from steam reforming of toluene using highly active and stable Ni@SiO2 yolk-shell catalysts 利用高效稳定的Ni@SiO2蛋黄壳催化剂制备甲苯蒸汽重整富氢合成气

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-10-03 DOI: 10.1016/j.ijhydene.2025.151818

Guang Yang, Qiang Hu, Haiping Yang, Yang Yang, Wei Cheng, Jiageng Xia, Hanping Chen

{"title":"Hydrogen-rich syngas production from steam reforming of toluene using highly active and stable Ni@SiO2 yolk-shell catalysts","authors":"Guang Yang, Qiang Hu, Haiping Yang, Yang Yang, Wei Cheng, Jiageng Xia, Hanping Chen","doi":"10.1016/j.ijhydene.2025.151818","DOIUrl":"10.1016/j.ijhydene.2025.151818","url":null,"abstract":"<div><div>Catalytic reforming technology holds significant potential for treating biomass gasification tar. However, the design of catalysts that offer high activity, low carbon deposition, and long-term stability remains a challenge. In this study, Ni@SiO<sub>2</sub> yolk-shell catalysts were synthesized and evaluated for their activity and stability in toluene steam reforming. The Ni@SiO<sub>2</sub>-10 catalyst demonstrated excellent stability and activity, maintaining a 100 % toluene conversion rate over a 120-h test period with virtually no carbon deposition after reforming. In contrast, Ni/SiO<sub>2</sub> and Ni/Al<sub>2</sub>O<sub>3</sub> catalysts, synthesized by incipient wetness impregnation, showed significant sintering and carbon deposition after use. Under identical support conditions, Ni@SiO<sub>2</sub> reduced the initial reaction temperature for toluene steam reforming from 462 °C to 418 °C. Increasing the Ni loading significantly enhanced the number of active sites, decreased the size of the SiO<sub>2</sub> microspheres, and thinned the SiO<sub>2</sub> shell layer, thereby elevating the toluene conversion from 72 % to 100 %. Both temperature and the GHSV (gas hourly space velocity) had a significant impact on catalytic performance, with conversion rates stabilizing at 700 °C and an GHSV = 24500 h<sup>−1</sup>. The yolk-shell structure of Ni@SiO<sub>2</sub> promoted high Ni dispersion, reducing aggregation and carbon deposition, which were key to its high activity and stability. These findings are crucial for the development of catalysts for biomass tar reforming.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"182 ","pages":"Article 151818"},"PeriodicalIF":8.3,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145204461","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

A Zirfon-type membrane based on exfoliated layered double hydroxide for advanced alkaline water electrolysis 基于剥离层状双氢氧化物的高级碱性电解锆型膜

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-10-03 DOI: 10.1016/j.ijhydene.2025.151819

Qi Sun , Luofu Min , Bin Wu , Xuejian Zhang , Honglu Liang , Li Xu , Wen Zhang , Yuxin Wang

{"title":"A Zirfon-type membrane based on exfoliated layered double hydroxide for advanced alkaline water electrolysis","authors":"Qi Sun , Luofu Min , Bin Wu , Xuejian Zhang , Honglu Liang , Li Xu , Wen Zhang , Yuxin Wang","doi":"10.1016/j.ijhydene.2025.151819","DOIUrl":"10.1016/j.ijhydene.2025.151819","url":null,"abstract":"<div><div>Large scale hydrogen production using clear and sustainable energy demands advanced alkaline water electrolysis (AWE) with high energy efficiency and good adaptation to fluctuating load. This would require the separator membrane in the electrolyzer to be more ion-conductive and more resistant to gas-crossover than the present commercially available, e.g. Zirfon, membranes. Herein, we report a membrane of exfoliated layered double hydroxide (LDH) bonded by polysulfone. The LDH-based membrane shows an area specific resistance of less than 50 mΩ cm<sup>2</sup>, more than 50 % lower than Zirfon UTP 500, in 30 wt% KOH solution at 80 °C. While the H<sub>2</sub> permeability of the LDH-based membrane is 8.9 × 10<sup>−9</sup> L cm cm<sup>−2</sup> s<sup>−1</sup>, an order of magnitude lower than that of Zirfon UTP 500. The LDH-based membrane in water electrolysis enables a current density of 1 A cm<sup>−2</sup> at 1.75 V in 30 wt% KOH solution at 80 °C, outperforming Zirfon UTP 500 by 58 mV. Notably, the membrane with up to 90 wt% LDH nanosheets (LNS) is fabricated using industrially viable phase inversion method, enabling straightforward mass manufacturability.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"182 ","pages":"Article 151819"},"PeriodicalIF":8.3,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145204462","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

Hydrogen generation via thermochemical decomposition of lithium hydride nano-particle in the presence of water: A temperature-accelerated reactive molecular dynamics and density functional theory based study 纳米氢化锂颗粒在水中热化学分解制氢：基于温度加速反应分子动力学和密度泛函理论的研究

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-10-03 DOI: 10.1016/j.ijhydene.2025.151824

Ankit Sahoo , Sunil Kumar

{"title":"Hydrogen generation via thermochemical decomposition of lithium hydride nano-particle in the presence of water: A temperature-accelerated reactive molecular dynamics and density functional theory based study","authors":"Ankit Sahoo , Sunil Kumar","doi":"10.1016/j.ijhydene.2025.151824","DOIUrl":"10.1016/j.ijhydene.2025.151824","url":null,"abstract":"<div><div>Understanding the hydrogen generation mechanism at the atomic length scale is critical for evolving clean energy technologies. Lithium hydride (Li–H) is a promising hydrogen storage and generation material due to its high hydrogen content and strong reactivity with water. In this paper, we have studied the formation of Li–H, its thermal stability, and the hydrogen generation during its hydrolysis, using reactive molecular dynamics simulations. Further, we employed density functional theory to obtain energy of frontier molecular orbitals to reveal the mechanisms of hydrogen formation. During hydrolysis of LiH nano-particle, the dissociation of Li–H bonds and the formation of hydrogen is observed by the adsorption of water molecules onto the Li atom of Li–H nano-particle. Further, the effect of Li–H nanoparticle size is examined using the Johnson-Mehl-Avrami-Kolmogorov (JMAK) model, and it is found that smaller nanoparticles show greater reactivity and faster hydrogen formation. Quantum chemical calculations show the reduction in HOMO-LUMO energy gap from 4.863 eV (LiH) to 4.309 eV (LiH + H<sub>2</sub>O), indicating increase in the chemical reactivity upon addition of water. In the final step, we have extended our study and observed the evolution of core-shell morphology in Li–H nanoparticles placed in H<sub>2</sub>O, CH<sub>4</sub>, CH<sub>3</sub>OH, NH<sub>3</sub>, and H<sub>2</sub>S environment at elevated temperature. Our integrated approach offers critical insight into the reaction mechanism and provides a theoretical basis for the design of efficient hydrogen-generating materials in sustainable energy systems.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"182 ","pages":"Article 151824"},"PeriodicalIF":8.3,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219165","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

Shock wave and flame propagation characteristics during spontaneous ignition of high-pressure (up to 35 MPa) hydrogen released into the atmosphere through a tube 高压（高达35mpa）氢气通过管道释放到大气中的自燃过程中的冲击波和火焰传播特性

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-10-03 DOI: 10.1016/j.ijhydene.2025.151263

Songlin Zhang, Guangbo Jiang, Yiming Jiang, Peiyu Duan, Min Li, Kaiqiang Jin, Qiangling Duan, Jinhua Sun

{"title":"Shock wave and flame propagation characteristics during spontaneous ignition of high-pressure (up to 35 MPa) hydrogen released into the atmosphere through a tube","authors":"Songlin Zhang, Guangbo Jiang, Yiming Jiang, Peiyu Duan, Min Li, Kaiqiang Jin, Qiangling Duan, Jinhua Sun","doi":"10.1016/j.ijhydene.2025.151263","DOIUrl":"10.1016/j.ijhydene.2025.151263","url":null,"abstract":"<div><div>Higher compression ratios (exceeding 350) characterize modern hydrogen storage systems, where high-pressure releases may induce spontaneous ignition. Extending beyond conventional sub-10 MPa studies, this work systematically investigates shock wave and flame dynamics during 10–35 MPa hydrogen releases through a tube, with particular focus on how release pressure and burst disk rupture characteristics affect ignition mechanisms. It has been demonstrated that, at design pressures over 25 MPa, the enhanced thickness of the burst disk induces a markedly nonlinear rupture process. This, in turn, engenders complex interactions between the generated shock waves and turbulent mixing. Following spontaneous ignition, two flame front detachment modes emerge: (1) a Y-shaped bifurcation formed by counter-rotating vortex pairs, and (2) axisymmetric single-vortex ring shedding. These results provide critical insights for the safety design of hydrogen infrastructure and demonstrate that regulating the burst disk opening ratio of the burst disk can effectively mitigate spontaneous ignition risks.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"182 ","pages":"Article 151263"},"PeriodicalIF":8.3,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145204458","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

Magnetically separable Co@Co–Al–O catalysts for NaBH4 hydrolysis: Water activation impact on activity and stability 磁性可分离Co@Co -Al-O催化剂的NaBH4水解：水活化对活性和稳定性的影响

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-10-03 DOI: 10.1016/j.ijhydene.2025.151823

Oksana V. Komova , Anna M. Ozerova , Valentina I. Simagina , Natalya A. Danilova , Inna L. Lipatnikova , Vladimir A. Rogov , Olga A. Bulavchenko , Yuriy A. Chesalov , Arcady V. Ishchenko , Olga V. Netskina

{"title":"Magnetically separable Co@Co–Al–O catalysts for NaBH4 hydrolysis: Water activation impact on activity and stability","authors":"Oksana V. Komova , Anna M. Ozerova , Valentina I. Simagina , Natalya A. Danilova , Inna L. Lipatnikova , Vladimir A. Rogov , Olga A. Bulavchenko , Yuriy A. Chesalov , Arcady V. Ishchenko , Olga V. Netskina","doi":"10.1016/j.ijhydene.2025.151823","DOIUrl":"10.1016/j.ijhydene.2025.151823","url":null,"abstract":"<div><div>The kinetic isotope effect (<em>k</em><sub><em>H</em></sub><em>/k</em><sub><em>D</em></sub><em>,</em> KIE) during replacement of H<sub>2</sub>O with D<sub>2</sub>O is a valuable tool for evaluating water activation in NaBH<sub>4</sub> hydrolysis. However, its correlation with catalyst activity and stability remains unclear. In this study, two magnetically separable catalysts of different activity with a Co<sup>0</sup> core and a “Co–Al–O″ shell were synthesized via galvanic replacement. Compared to the non-catalytic process, water activation on the catalyst surface occurs more efficiently, resulting in reduced <em>k</em><sub><em>H</em></sub><em>/k</em><sub><em>D</em></sub>. The active Co-O<sub>max</sub> catalyst contains a higher amount of oxidized phases (Co<sub>3</sub>O<sub>4</sub>, CoO, Co(OH)<sub>2</sub>, Co–Al layered double hydroxide), which reduce to the active component in the reaction medium. Their deficiency in Co-O<sub>min</sub> causes a sharp activity decline and a drastic increase in <em>k</em><sub><em>H</em></sub><em>/k</em><sub><em>D</em></sub> (>5) upon reuse, indicating a shift toward the non-catalytic pathway. In contrast, highly active Co-O<sub>max</sub> demonstrates an efficient catalytic water activation supported by a stable <em>k</em><sub><em>H</em></sub><em>/k</em><sub><em>D</em></sub> of 2.34 ± 0.05 over five cycles. The observed monotonic decrease in H<sub>2</sub> generation rate for this catalyst is probably attributable to the hydride activation step.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"182 ","pages":"Article 151823"},"PeriodicalIF":8.3,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145204463","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

Design and performance analysis of microfluidic channels for novel snake coil flow field proton exchange membrane fuel cells 新型蛇形线圈流场质子交换膜燃料电池微流控通道设计及性能分析

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-10-03 DOI: 10.1016/j.ijhydene.2025.151834

Qingsong Zuo, Guangyuan Wang, Guohui Zhu, Zhiqi Wang, Junjie Chen, Zhuang Shen, Yong Wang, Yan Li, Mengni Wang

{"title":"Design and performance analysis of microfluidic channels for novel snake coil flow field proton exchange membrane fuel cells","authors":"Qingsong Zuo, Guangyuan Wang, Guohui Zhu, Zhiqi Wang, Junjie Chen, Zhuang Shen, Yong Wang, Yan Li, Mengni Wang","doi":"10.1016/j.ijhydene.2025.151834","DOIUrl":"10.1016/j.ijhydene.2025.151834","url":null,"abstract":"<div><div>Developing refined flow field design is a pivotal research direction aimed at enhancing the performance of proton exchange membrane fuel cells (PEMFCs). In this paper, a numerical model of a snake coil flow field (SCFF) PEMFC with a microchannel structure is constructed to investigate the effect of the microchannel structure on cell performance from multiple perspectives. The construction of a 3D multi-phase non-isothermal PEMFC model is carried out in this paper, and the accuracy of the models is verified based on experimental data. Secondly, the cell output performance is analyzed based on the pressure drop in the flow channel as well as the net power. Subsequently, the flow field mass transfer capability is appraised by examining the uniformity of reactant distribution and the concentration polarization phenomenon. Finally, the H<sub>2</sub>O management capability of the cell is analyzed based on a combination of six aspects, including proton conductivity and liquid water saturation. The results demonstrate that the incorporation of microchannel structures into the design of the cell results in enhanced output performance, mass transfer capability, and H<sub>2</sub>O management. In comparison to the SCFF without microchannels, the flow channel pressure drop is reduced by 147.0 % when the number of microchannels is optimal at 2, the net power is increased by 8.37 %, and the more intense electrochemical reaction is accompanied by lower water content and liquid water saturation. Furthermore, it is observed that the continuous increase in the number of microchannels did not result in enhanced cell performance. This study is a valuable reference point for the investigation of microchannel flow field effects on cell performance using PEMFC multiphysics field analysis.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"182 ","pages":"Article 151834"},"PeriodicalIF":8.3,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219161","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

Thermally modulated RuO2/MoOx heterostructures for high-efficiency electrocatalytic oxidation reactions 用于高效电催化氧化反应的热调制RuO2/MoOx异质结构

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-10-03 DOI: 10.1016/j.ijhydene.2025.151774

Jintao Wang , Yue Hao , Xiaojing Dong , Ming Yang , Bo Xu , Cuncheng Li

{"title":"Thermally modulated RuO2/MoOx heterostructures for high-efficiency electrocatalytic oxidation reactions","authors":"Jintao Wang , Yue Hao , Xiaojing Dong , Ming Yang , Bo Xu , Cuncheng Li","doi":"10.1016/j.ijhydene.2025.151774","DOIUrl":"10.1016/j.ijhydene.2025.151774","url":null,"abstract":"<div><div>As ever-increasing global energy demands intersect with heightened environmental awareness, next-generation sustainable power generation methods have become a focal point of extensive research. Hydrogen fuel has emerged as a promising carbon-neutral energy carrier, with water electrolysis-based hydrogen synthesis drawing particular interest owing to its environmental benignity and zero-emission operation. Nevertheless, the inherent thermodynamic limitations and sluggish kinetics of the anode's oxygen evolution process (OER) present substantial energy efficiency barriers that require innovative electrocatalyst solutions. Ruthenium-based catalysts are highly favored for their high activity and low cost, yet their tendency to aggregate during synthesis compromises catalytic performance. This study presents a method for preparing RuO<sub>2</sub>/MoO<sub>x</sub> heterostructure catalysts, where precise control of molybdenum oxidation states through thermal modulation significantly enhances OER catalytic activity and stability. In alkaline media, the RuO<sub>2</sub>/MoO<sub>x</sub> catalyst achieves a low overpotential of 212 mV and exhibits a Tafel slope of 70.8 mV·dec<sup>−1</sup>. Furthermore, the 72-h stability test in alkaline solution confirms the material's exceptional durability. Additionally, the catalyst demonstrates superior performance in urea oxidation (UOR) and ammonia oxidation reactions. This work provides a scalable strategy for developing high-performance and stable RuO<sub>2</sub>/MoO<sub>x</sub> based electrocatalysts.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"182 ","pages":"Article 151774"},"PeriodicalIF":8.3,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219164","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

Forward osmosis membrane bioreactor for sustainable hydrogen production from waste molasses 用正向渗透膜生物反应器可持续利用废糖蜜制氢

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-10-03 DOI: 10.1016/j.ijhydene.2025.151829

Aditya Tiwari , Ishida Tomoki , Wakui Kenji , Mahesh Ganesapillai , Aruna Singh , Kazuho Nakamura

{"title":"Forward osmosis membrane bioreactor for sustainable hydrogen production from waste molasses","authors":"Aditya Tiwari , Ishida Tomoki , Wakui Kenji , Mahesh Ganesapillai , Aruna Singh , Kazuho Nakamura","doi":"10.1016/j.ijhydene.2025.151829","DOIUrl":"10.1016/j.ijhydene.2025.151829","url":null,"abstract":"<div><div>The current study evaluates the feasibility of a forward osmosis membrane bioreactor (FO-MBR) for dark fermentation, aiming at simultaneous biohydrogen production and wastewater treatment. Optimal microbial inoculation was achieved via heat-treated activated sludge, enriching <em>Clostridium sensu stricto</em> 1 and yielding up to 2.21 mol H<sub>2</sub>.(mol hexose)<sup>−1</sup> in batch mode. In continuous operation, a substrate concentration of 4.4 g L<sup>−1</sup> and a hydraulic retention time (HRT) of 12 h delivered the best results, producing 1.51 mol H<sub>2</sub>.(mol hexose<sub>supplied</sub>)<sup>−1</sup>. The FO-MBR, configured with a 1.1 m<sup>2</sup> hollow fiber side-stream membrane module and operated under dynamic HRT (2.5–12 h) dependent on membrane flux, was integrated with intermittent CSTR (Continuous stirred tank reactor) operation to counter metabolite accumulation. This system outperformed a conventional CSTR, achieving a hydrogen yield of 1.78 mol H<sub>2</sub>.(mol hexose<sub>supplied</sub>)<sup>−1</sup>. Remarkable treatment efficiencies were observed with BOD<sub>5</sub>, COD, and TOC removal rates of 95.32 %, 99.02 %, and 99.10 %, respectively, and an 83.8 % reduction in total waste volume. Additionally, the FO-MBR demonstrated strong antifouling performance, with 96.14 % water flux recovery achieved after a brief 5 min hydraulic rinse following 47.5 h of continuous high-strength broth exposure. These results highlight the FO-MBR system's ability as a sustainable and high-performance alternative for integrated hydrogen production and effluent treatment. Further studies are recommended to address long-term fouling control and metabolite management for industrial scalability.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"182 ","pages":"Article 151829"},"PeriodicalIF":8.3,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219162","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

Stalactite-like Ni–Co–P/Cu3P heterostructures supported on Cu foam for enhanced alkaline hydrogen evolution reaction 泡沫铜支撑的钟乳石状Ni-Co-P /Cu3P异质结构增强碱性析氢反应

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-10-03 DOI: 10.1016/j.ijhydene.2025.151705

Lu Li , Nan Sun , Pan Song , Chunlin Song , Jingang Yang

{"title":"Stalactite-like Ni–Co–P/Cu3P heterostructures supported on Cu foam for enhanced alkaline hydrogen evolution reaction","authors":"Lu Li , Nan Sun , Pan Song , Chunlin Song , Jingang Yang","doi":"10.1016/j.ijhydene.2025.151705","DOIUrl":"10.1016/j.ijhydene.2025.151705","url":null,"abstract":"<div><div>Developing high-performance non-noble metal catalysts for the hydrogen evolution reaction (HER) is crucial for advancing alkaline water electrolysis as a sustainable hydrogen production technology. Herein, self-supported stalactite-like Ni–Co–P/Cu<sub>3</sub>P–CF heterostructures are grown on Cu foam (CF) via in-situ growth, electrodeposition, and low-temperature phosphorization to maximize catalytic performance. In 1 M KOH, the Ni–Co–P/Cu<sub>3</sub>P–CF catalyst achieves current densities of 10 mA cm<sup>−2</sup> and 100 mA cm<sup>−2</sup> at overpotentials of only 82 mV and 181 mV, respectively, along with a small Tafel slope of 54.9 mV dec<sup>−1</sup> and excellent stability (with merely a 2 mV overpotential loss after 60 h of testing). This is mainly attributed to the stalactite-like structure, which increases the exposure of active sites and facilitates the release of gas bubbles, coupled with the heterointerfaces combined with bimetallic electronic regulation that accelerates charge transfer and optimizes the adsorption energy of hydrogen evolution reaction intermediates. This study highlights the significance of structural design and bimetallic synergy in developing high-efficiency non-noble metal electrocatalysts, offering a highly promising approach for hydrogen production.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"182 ","pages":"Article 151705"},"PeriodicalIF":8.3,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145204460","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