{"title":"Techno-economic analysis of integrated offshore wind–solar energy systems for green hydrogen production","authors":"Giwangkara Ricky Perdana, Behgol Bagheri, Hiromu Kumagai, Masakazu Sugiyama","doi":"10.1016/j.ijhydene.2025.151587","DOIUrl":"10.1016/j.ijhydene.2025.151587","url":null,"abstract":"<div><div>‘Green’ hydrogen, produced by the electrolysis of water using renewable energy sources, is expected to become a versatile energy carrier in the future. This study examined the techno-economic performance of combined offshore wind-solar energy systems for hydrogen production in Choshi, Chiba Prefecture, Japan, a region with high average wind speeds. Hourly wind speed and solar radiation data were used to simulate hydrogen production under two system configurations: unlimited power cuts without batteries and no power cuts with battery storage. In the no-power-cut case, battery integration increased the nominal hydrogen cost by 43.8 %, 17.7 %, and 19.8 % in 2025, 2030, and 2050, respectively. However, sensitivity analysis considering higher electrolyzer OPEX due to degradation revealed that the unlimited power-cut system can become more expensive, making battery-supported systems economically favorable over the long term. These findings highlight the importance of integrating battery storage to enhance technical reliability and economical pathways for offshore wind–solar hydrogen production systems.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"180 ","pages":"Article 151587"},"PeriodicalIF":8.3,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145181319","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}
Jie Chen , Mingxuan Tang , Zhengyuhan Tu , Xiujie Chen , Hongze Cai , Jian Qi , Fengying Zheng , Shunxing Li
{"title":"Tailored anchoring of FeNiOx on carbon nanotubes to enhance local electric field for boosting overall water splitting","authors":"Jie Chen , Mingxuan Tang , Zhengyuhan Tu , Xiujie Chen , Hongze Cai , Jian Qi , Fengying Zheng , Shunxing Li","doi":"10.1016/j.ijhydene.2025.151706","DOIUrl":"10.1016/j.ijhydene.2025.151706","url":null,"abstract":"<div><div>Developing non-precious metal FeNi based bifunctional electrocatalysts for high-performance overall water splitting is crucial for advancing hydrogen energy technology. However, they commonly suffer lower activity in hydrogen evolution reaction (HER) due to unsuitable intermediates adsorption and delayed electrons transfer. In this work, by a directional arrangement strategy, raft-like FeNiO<sub>x</sub> active species were precisely constructed supported on carbon nanotubes (CNTs). This electrocatalyst exhibited significantly improving HER activity under alkaline conditions with a lower overpotential of 70 mV and Tafel slope of 51.6 mV dec<sup>−1</sup> at current density of 10 mA cm<sup>−2</sup>. Meanwhile, it also maintained superior performance for oxygen evolution reaction (OER), requiring only 205 mV overpotential and a Tafel slope of 74.9 mV dec<sup>−1</sup> at the same current density. A cell voltage of just 1.485 V was needed to reach 10 mA cm<sup>−2</sup> in overall water splitting and outperformed commercial Pt/C||IrO<sub>2</sub> electrodes. This promotion was derived from the enhanced local electronic field and electron transport on FeNiO<sub>x</sub> rafts induced by confinement effect on CNTs. Moreover, the dynamic optimization of electronic structure at Fe–<em>O</em>–Ni heteronuclear sites further reduced the reaction energy of rate-determining step in both HER and OER reactions. This study provides novel insights into the rational design of electrocatalyst microstructures and precise modulation of electronic properties, thereby accelerating the commercialization of overall water splitting technology.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"180 ","pages":"Article 151706"},"PeriodicalIF":8.3,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218464","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}
Tan Zhou , Zhanghong Huang , Xin Peng , Zhiyi Deng , Liping Xiao , Fusheng Li
{"title":"Effect of magnetic field intensity on hydrogen production by anaerobic fermentation of kitchen waste combined with excess sludge","authors":"Tan Zhou , Zhanghong Huang , Xin Peng , Zhiyi Deng , Liping Xiao , Fusheng Li","doi":"10.1016/j.ijhydene.2025.150392","DOIUrl":"10.1016/j.ijhydene.2025.150392","url":null,"abstract":"<div><div>In this study, the effect of magnetic field intensity (MFI) on anaerobic biohydrogen was investigated using excess sludge as inoculum and simulated kitchen waste as substrate, at 37 ± 1 °C. The effect mechanism of static magnetic fields (SMF) was elucidated by analysis of metabolites, key enzyme, and electron transfer system. The results showed that the biohydrogen production could be enhanced with MFI of 10∼100 mT and 80 mT was optimum. The maximum hydrogen production rates and cumulative hydrogen production increased 16 % and 9 % at the 80 mT SMF, respectively. Moreover, the reduced coenzyme I/coenzyme I balance, and activity of cytochrome C could be improved by SMF to accelerate the rate of electron transfer, which increased the synthesis and release of α-amylase, pyruvate kinase, reduced coenzyme I, and ferredoxin reductase. It was inferred that the enhancement in biohydrogen production was mainly achieved by improving hydrolysis and pyruvate decarboxylation pathways.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"180 ","pages":"Article 150392"},"PeriodicalIF":8.3,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Comparative analysis of thermodynamic performance and economic viability of compressed and liquid hydrogen refueling stations","authors":"Jinyeong Jeong , Hyunjick Kim , Hwalong You","doi":"10.1016/j.ijhydene.2025.151768","DOIUrl":"10.1016/j.ijhydene.2025.151768","url":null,"abstract":"<div><div>Compressed gaseous hydrogen refueling station (CHRS) and liquid hydrogen refueling station (LHRS) represent two principal pathways to enable large-scale hydrogen mobility; yet rigorous comparative evaluations remain scarce. This study systematically assesses thermodynamic and economic characteristics under unified design conditions at capacities of 800, 1,000, and 2000 kg/day. Results show that the LHRS achieves 47 % lower energy than the CHRS (111.6 kW reduction), owing to pump-based pressurization and reduced cooling requirements. Economic analysis indicates pronounced economies of scale; as the capacity increases, the levelized cost of hydrogen (LCOH) decreases by 41.9 % (2.42 USD/kg) for the CHRS and 51.3 % (2.82 USD/kg) for the LHRS. At 2000 kg/day, both systems achieve an LCOH below 2.1 USD/kg. The LCOH comprises hydrogen procurement, capital expenditure, and operating expenditure. The CHRS is more sensitive to electricity price, while the LHRS is affected more by the discount rate. These findings provide insights for rational hydrogen infrastructure planning.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"180 ","pages":"Article 151768"},"PeriodicalIF":8.3,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218917","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}
Lu Wen , Chaojie Li , Houqun Xiao , Huazhou Hu , Ruizhu Tang , Chengsi Hu , Chuanming Ma , Chaobin Lai , Luocai Yi , Qingjun Chen
{"title":"Cr substitution enhances Zr0.95V0.05Co1-xCrx(x = 0–0.15) alloy’s hydrogen isotope storage and anti hydrogen-induce disproportionation","authors":"Lu Wen , Chaojie Li , Houqun Xiao , Huazhou Hu , Ruizhu Tang , Chengsi Hu , Chuanming Ma , Chaobin Lai , Luocai Yi , Qingjun Chen","doi":"10.1016/j.ijhydene.2025.151682","DOIUrl":"10.1016/j.ijhydene.2025.151682","url":null,"abstract":"<div><div>The ZrCo alloy, considered an ideal candidate material for hydrogen (or its isotope) storage to replace uranium in the ITER, faces challenges due to its susceptibility to hydrogen-induced disproportionation, which leads to a diminished cycling life. To address this, we investigated the substitution of V and Cr for Zr and Co. Our study reveals that this substitution not only refines the grain size and expands the lattice constant but also significantly enhances the kinetics of hydrogen absorption. Notably, the Zr<sub>0.95</sub>V<sub>0.05</sub>Co<sub>0.85</sub>Cr<sub>0.15</sub> alloy demonstrates a remarkable 98.8 % reduction in the time required to absorb 90 % of its full capacity compared to ZrCo. This alloy also exhibits superior isotope effects under H<sub>2</sub> and D<sub>2</sub> environments, along with lower enthalpy and entropy for dehydrogenation, contributing to a reduced dehydrogenation temperature and enhanced resistance to disproportionation. After 50 cycles of hydrogen absorption and desorption, the hydrogen storage capacity of Zr<sub>0.95</sub>V<sub>0.05</sub>Co<sub>0.85</sub>Cr<sub>0.15</sub> alloys decreases by only 5.7 %, significantly outperforming other reference samples and demonstrating its exceptional anti-disproportionation capability. These results indicate that the Zr<sub>0.95</sub>V<sub>0.05</sub>Co<sub>0.85</sub>Cr<sub>0.15</sub> alloy exhibits the best resistance to hydrogen-induced disproportionation. Moreover, post-50 cycling analysis confirms <strong>that</strong> the phase of the alloy is still dominated by the ZrCo phase, indicating its excellent structural stability. Our findings offer valuable insights into optimizing ZrCo-based alloys for enhanced hydrogen storage performance and cycling stability, providing potential references for advancements in hydrogen isotope storage materials design.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"180 ","pages":"Article 151682"},"PeriodicalIF":8.3,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145181371","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}
Jiangkuan Xing, Zhenhua An, Xingyuan Liang, Ruixiang Wang, Ryoichi Kurose
{"title":"A comprehensive assessment of reaction mechanisms for NO formation in ammonia/hydrogen/air flames","authors":"Jiangkuan Xing, Zhenhua An, Xingyuan Liang, Ruixiang Wang, Ryoichi Kurose","doi":"10.1016/j.ijhydene.2025.151598","DOIUrl":"10.1016/j.ijhydene.2025.151598","url":null,"abstract":"<div><div>High nitrogen emission is one of the significant challenges for the utilization of ammonia (NH<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>) as a clean fuel. Although the reaction kinetics for ammonia/hydrogen (NH<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>/H<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>) combustion have advanced significantly in the recent decades, how well they predict nitric oxide (NO) formation has not been thoroughly examined. To this end, this paper comprehensively assesses the existing reaction kinetics for NO formation in NH<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>/H<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>/air flames through comparisons between their predictions and measurements from multiple sources of experiments. Specifically, six sources of experimental data from various configurations and thirty-six reaction mechanisms are collected from the published literature. The predictions of those reaction mechanisms are quantitatively compared with the experimental measurements. It is discovered that the performance of the reaction mechanisms varies across different configurations, and none of the collected mechanisms can well reproduce all the experimental data-sets. This could be attributed to the fact that those kinetic models were developed/optimized based on different targets. Overall, the kinetic model developed by Mei et al. [Combust. Flame, 2020, 220, 368-377] demonstrates superior accuracy in predicting NO formation across various configurations, achieving the lowest mean absolute error (MAE). The present work provides valuable guidelines on the selection of reaction mechanisms for NO formation in numerical simulations of NH<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>/H<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>/air flames.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"180 ","pages":"Article 151598"},"PeriodicalIF":8.3,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Predicting MXenes hybrid functional bandgaps for photocatalytic applications using deep neural networks","authors":"R.S.B. Pranav , Bhargav Akkinepally , Mohan Rao Tamtam , Nagaraju Macherla , Jaesool Shim","doi":"10.1016/j.ijhydene.2025.151695","DOIUrl":"10.1016/j.ijhydene.2025.151695","url":null,"abstract":"<div><div>The accelerated discovery of efficient photocatalytic materials is critical for advancing sustainable hydrogen production technologies. Two-dimensional transition metal carbides and nitrides, known as MXenes, have emerged as promising candidates owing to their tunable band structures and diverse surface terminations. In present study, an artificial neural network (ANN) model was developed to predict hybrid functional bandgap (<span><math><mrow><mo>(</mo><msubsup><mi>E</mi><mi>g</mi><mrow><mi>P</mi><mi>B</mi><mi>E</mi><mn>0</mn></mrow></msubsup></mrow></math></span>) of 3679 MXene compounds, encompassing both Ti-based and non-Ti-based variants. The dataset integrates elemental, structural, and electronic features, along with engineered descriptors such as electronegativity differences (M–X and T–X), mean atomic mass, and total valence. The model was trained using a feed forward architecture with three hidden layers and optimized using the Adam optimizer with early stopping. Performance was assessed using standard regression metrics, yielding high accuracy with R<sup>2</sup> = 0.9884, MAE = 0.0217 eV, and RMSE = 0.0602 eV. To corroborate trends, Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> was synthesized and characterized (XRD/XPS/SEM/TEM/AFM/UV-Vis). This work highlights the effectiveness of using deep learning models trained on diverse MXene datasets for bandgap prediction and provides a reliable foundation for future integration with experimental validation and HER-specific screening.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"180 ","pages":"Article 151695"},"PeriodicalIF":8.3,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145181321","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}
Jingting Sun , Shangshang Wang , Xingyu Liu , Huan Yu , Jiaming Li , Chao Liu , Qinfang Zhang , Zhigang Zou
{"title":"Interfacial charge transfer via Mo–S bonds in MoSe2/Mn0.5Cd0.5S S-scheme heterojunction for efficient photocatalytic H2 evolution","authors":"Jingting Sun , Shangshang Wang , Xingyu Liu , Huan Yu , Jiaming Li , Chao Liu , Qinfang Zhang , Zhigang Zou","doi":"10.1016/j.ijhydene.2025.151786","DOIUrl":"10.1016/j.ijhydene.2025.151786","url":null,"abstract":"<div><div>Photocatalytic hydrogen production (PHE) technology has emerged as a sustainable approach to convert solar energy into hydrogen energy, exhibiting significant potential for clean energy applications. In this study, an ultrasonic-assisted method was adopted to fabricate S-scheme MoSe<sub>2</sub>/Mn<sub>0.5</sub>Cd<sub>0.5</sub>S (MoSe<sub>2</sub>/MCS) composites, where intimate heterostructures are formed through interfacial Mo–S bonds between MCS and MoSe<sub>2</sub>. The atomic-level Mo–S bonds establish charge transport pathways and enable directional control of charge transfer. The as-constructed S-scheme MoSe<sub>2</sub>/MCS photocatalysts exhibit two critical advantages: enhanced charge carrier separation rate and improved overall redox capacity. Under visible-light irradiation, the MoSe<sub>2</sub>/MCS composites significantly outperform pure MCS in PHE performance. The optimal 5-MoSe<sub>2</sub>/MCS composite demonstrates the superior PHE activity, achieving an apparent quantum yield value of 71.16 % at 400 nm and remarkable photocatalytic stability. Key characterization techniques, including (solution-based) time-resolved photoluminescence technique, theoretical calculation, photoelectrochemical measurements, were employed to elucidate the positive correlation between ion-carrier interaction and charge separation efficiency, thereby enhancing the PHE performance. Based on experimental analysis and theoretical calculation, a plausible PHE mechanism for the S-scheme MCS composites is revealed and discussed in detail. These findings provide valuable insights for designing high-efficiency S-scheme heterostructured composites with interfacial chemical bonds.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"180 ","pages":"Article 151786"},"PeriodicalIF":8.3,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145181318","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}
Medhen W. Abebe , Anteneh F. Baye , Bekelcha T. Gadisa , Hern Kim
{"title":"Biomass-derived carbon dots embedded in B2O3 matrix with high proton density: A role as metal-free catalyst and hydrogel fillers for renewable energy applications","authors":"Medhen W. Abebe , Anteneh F. Baye , Bekelcha T. Gadisa , Hern Kim","doi":"10.1016/j.ijhydene.2025.151713","DOIUrl":"10.1016/j.ijhydene.2025.151713","url":null,"abstract":"<div><div>Biomass-derived carbon dots (CDs) are emerging as promising candidates for fluorescent sensing and energy applications due to their tunable optical properties and environmental sustainability. However, their practical utility in renewable energy systems is hindered by low proton density, insufficient Lewis acid sites, poor ionic conductivity, and a strong tendency to aggregate. Herein, CDs from coffee waste are systematically embedded in a boron oxide (B<sub>2</sub>O<sub>3</sub>) matrix using boric acid (BA) as boron source via hydrothermal method. The resulting composite (BA<sub>1</sub>CD) serves as a metal-free catalyst for hydrogen generation through sodium borohydride (NaBH<sub>4</sub>) methanolysis. The B<sub>2</sub>O<sub>3</sub> matrix induces Lewis acid sites in BA<sub>1</sub>CD that activate methanol for the reaction. Consequently, BA<sub>1</sub>CD exhibits remarkable catalytic activity for hydrogen generation, with a high hydrogen generation rate (139 L H<sub>2</sub> g<sup>−1</sup> min<sup>−1</sup>) and low activation energy (26.2 kJ/mol). Furthermore, BA<sub>1</sub>CD is incorporated as functional filler into polyacrylamide (PAM) hydrogel for triboelectric nanogenerator (TENG). Interestingly, B<sub>2</sub>O<sub>3</sub> matrix promotes uniform dispersion of the CDs and prevents the aggregation of CD in the PAM hydrogel. Therefore, BA<sub>1</sub>CD/PAM hydrogel demonstrates superior TENG performance with high output voltage (37.8 V) and current density (6.6 mA/m<sup>2</sup>), successfully powering various low-voltage everyday devices. This study provides a sustainable and multifunctional approach for biomass valorization toward advanced energy harvesting and storage technologies.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"180 ","pages":"Article 151713"},"PeriodicalIF":8.3,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145181322","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}
Chengjie Wang, Yuanqiang Wang, Yaxin Wang, Yichuan Rui, Haozhen Zhu, Dezhi Pan, Yanfang Gu, Ting Wang
{"title":"Efficient overall water splitting electrode regulated by Pt nanodots modified NiCo-carbonate hydroxide nanowires on porous rGO matrix","authors":"Chengjie Wang, Yuanqiang Wang, Yaxin Wang, Yichuan Rui, Haozhen Zhu, Dezhi Pan, Yanfang Gu, Ting Wang","doi":"10.1016/j.ijhydene.2025.151788","DOIUrl":"10.1016/j.ijhydene.2025.151788","url":null,"abstract":"<div><div>We report a novel strategy for constructing the OWS electrode by modifying nickel-cobalt carbonate hydroxide nanowires (NiCo-CHs) arrays with platinum (Pt) nanodots on a three-dimensional porous reduced graphene oxide (3D-rGO) matrix. The incorporation of Pt nanodots induces substantial modulation in the electronic states of NiCo-CHs, leading to a synergistic heterostructure that favors the OWS. The introduction of 3D-rGO enhances electrical conductivity, facilitates charge transfer, and provides abundant surface sites for the deposition of active components. Consequently, the electrode with a multi-dimensional heterostructure possesses remarkable bifunctional electrocatalytic activity, achieving low overpotentials of 73 mV for HER at −10 mA cm<sup>−2</sup> and 272 mV for OER at 50 mA cm<sup>−2</sup>. Furthermore, the electrode exhibits superior reaction kinetics, enhanced charge transfer characteristics, and excellent stability and durability for both HER and OER. When configured into an OWS cell, the device achieves a low operating voltage of 1.40 V at 10 mA cm<sup>−2</sup>.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"180 ","pages":"Article 151788"},"PeriodicalIF":8.3,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218459","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}