International Journal of Hydrogen Energy最新文献_第7页

Co-gasification of sewage sludge derived hydrochar and coal: Implications for syngas production and ash content 污水污泥衍生烃类和煤的共气化：对合成气生产和灰分含量的影响

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-07-29 DOI: 10.1016/j.ijhydene.2025.150682

Asma Leghari , Azhar Ali Laghari , Akash Kumar , Muhammad Rizwan , Anira Latif , Lata Kumari , Mahmood Laghari , Lu Ding , Guangsuo Yu

{"title":"Co-gasification of sewage sludge derived hydrochar and coal: Implications for syngas production and ash content","authors":"Asma Leghari , Azhar Ali Laghari , Akash Kumar , Muhammad Rizwan , Anira Latif , Lata Kumari , Mahmood Laghari , Lu Ding , Guangsuo Yu","doi":"10.1016/j.ijhydene.2025.150682","DOIUrl":"10.1016/j.ijhydene.2025.150682","url":null,"abstract":"<div><div>The co-gasification of hydrothermally carbonized sewage sludge-derived hydrochar (HC) with SH coal under a CO<sub>2</sub> atmosphere presents a promising route for sustainable energy generation and CO<sub>2</sub> mitigation. This study systematically investigates the influence of HC-to-coal blending ratios and gasification temperatures on syngas composition, tar formation, and ash content. A blend of 25 wt % HC with 75 wt % coal at 950 °C was found to be optimal, achieving a 21.32 % ash and elevating the syngas lower heating value to 8.49 MJ/Nm<sup>3</sup>, thereby indicating enhanced gasification efficiency. The optimized blend was further evaluated at 800–950 °C to elucidate temperature-dependent behavior. Gas analysis revealed that CO<sub>2</sub> remained the dominant component (>60 vol %), while H<sub>2</sub> concentration increased from 40 % to 58 % with rising HC content due to intensified thermal cracking and organic matter depolymerization. Concurrently, CO concentration rose significantly from 16 % at 800 °C to 59 % at 950 °C, attributed to enhanced Boudouard and water–gas shift reactions facilitated by the CO<sub>2</sub> environment. Tar analysis showed an increase in polycyclic aromatic hydrocarbons (PAHs) with higher HC ratios, highlighting a trade-off between syngas quality and tar burden. This work provides a comprehensive mechanistic insight into HC–coal co-gasification, underscoring the critical role of temperature and blending optimization in maximizing syngas yield while minimizing undesirable byproducts. The findings support co-gasification as a viable waste-to-energy pathway for sewage sludge valorization and reduced reliance on fossil fuels.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"161 ","pages":"Article 150682"},"PeriodicalIF":8.3,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722799","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

Characteristics of OH∗, NO∗ chemiluminescence, flame temperature, and heat release in hydrogen inverse diffusion flame 氢逆扩散火焰中OH *、NO *的化学发光、火焰温度和热释放特性

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-07-29 DOI: 10.1016/j.ijhydene.2025.150648

Seunghyun Jo, Jeong-Yeol Choi

引用次数: 0

Control-oriented modeling and observation of a single cell proton ceramic electrochemical reactor for single-stage ammonia cracking to compressed hydrogen 面向控制的单电池质子陶瓷电化学反应器单级氨裂解压缩氢的建模与观察

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-07-29 DOI: 10.1016/j.ijhydene.2025.150557

Andreu Cecilia , David Catalán-Martínez , Sonia Escolástico , Maria Serra , Jose M. Serra , Ramon Costa-Castelló

{"title":"Control-oriented modeling and observation of a single cell proton ceramic electrochemical reactor for single-stage ammonia cracking to compressed hydrogen","authors":"Andreu Cecilia , David Catalán-Martínez , Sonia Escolástico , Maria Serra , Jose M. Serra , Ramon Costa-Castelló","doi":"10.1016/j.ijhydene.2025.150557","DOIUrl":"10.1016/j.ijhydene.2025.150557","url":null,"abstract":"<div><div>A novel proton ceramic electrochemical reactor has recently been proposed for the efficient extraction of hydrogen from ammonia. This reactor integrates heat management, ammonia dehydrogenation, hydrogen separation, and compression into a single, streamlined process. Despite its potential, the operation and monitoring of the reactor pose significant challenges. Effective management of the complex nonlinear interactions between electrical, chemical, and thermal processes is essential to avoid performance degradation and ensure safe operation of this new electrochemical reactor. Our contributions are a first step for addressing these challenges through two key innovations. First, we introduce a control-oriented, and computationally efficient model for a single cell of the electrochemical reactor. Second, we leverage this model to develop a soft sensor based on observer theory, that uses real-time measurements to estimate the hydrogen mass fraction and the partial pressures of hydrogen at both sides of the ceramic membrane and the membrane area specific resistance.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"161 ","pages":"Article 150557"},"PeriodicalIF":8.3,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722798","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

Promising two-dimensional Janus β-PdXO (X = S/Se) for photocatalytic water splitting 有前途的二维Janus β-PdXO （X = S/Se）光催化水分解

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-07-29 DOI: 10.1016/j.ijhydene.2025.150617

Yunxia Hao, Shuo Jiang, Xi Sun, Zihan Qu, Zuyu Xu, Yunlai Zhu, Yuehua Dai

{"title":"Promising two-dimensional Janus β-PdXO (X = S/Se) for photocatalytic water splitting","authors":"Yunxia Hao, Shuo Jiang, Xi Sun, Zihan Qu, Zuyu Xu, Yunlai Zhu, Yuehua Dai","doi":"10.1016/j.ijhydene.2025.150617","DOIUrl":"10.1016/j.ijhydene.2025.150617","url":null,"abstract":"<div><div>Two-dimensional (2D) Janus materials, characterized by intrinsic electric fields (EFs), hold significant potential in photocatalytic water splitting for the direct production of hydrogen, offering a promising solution to both environmental pollution and the global energy crisis. In this work, we investigate the electronic and photocatalytic properties of the Janus monolayer <em>β</em>-PdXO (X = S/Se). The HSE06 functional calculations show that the <em>β</em>-PdSO and <em>β</em>-PdSeO monolayers are semiconductors with indirect bandgaps of 1.93 eV and 2.11 eV, respectively. Furthermore, the internal EFs resulting from the broken vertical symmetry, facilitate favorable band alignments for efficient photocatalytic water splitting. The optical absorption of the <em>β</em>-PdXO monolayers extend to 10<sup>5</sup> cm<sup>−1</sup> in both the visible and ultraviolet light. Notably, the <em>β</em>-PdSeO monolayer demonstrates exceptionally high electron mobility of 1.66 × 10<sup>5</sup> cm<sup>2</sup>V<sup>−1</sup>s<sup>−1</sup>, which is beneficial for the effective separation of electrons and holes. In addition, we propose a photocatalytic pathway for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), identifying the most energetically favorable absorbed intermediates for the <em>β</em>-PdXO monolayers. Remarkably, the free energy change (<em>ΔG</em>) for the HER on the <em>β</em>-PdSeO monolayer is nearly zero (−0.006 eV). Finally, the corrected Solar-to-Hydrogen (STH) efficiency is calculated to be 18.41 % for the <em>β</em>-PdSO monolayer and 13.20 % for the <em>β</em>-PdSeO monolayer. These findings suggest that Janus <em>β</em>-PdXO monolayers are promising candidates for improving the performance of photocatalysts for water splitting.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"161 ","pages":"Article 150617"},"PeriodicalIF":8.3,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722810","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

High-performance Mo2Ti2C3Tx/MoS2 hybrid electrocatalyst for sustainable hydrogen production 高性能Mo2Ti2C3Tx/MoS2混合电催化剂可持续制氢

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-07-29 DOI: 10.1016/j.ijhydene.2025.150533

Abdul Hanan , Arshid Numan , Muhammad Norhaffis Mustafa , Rashmi Walvekar , Mohammad Khalid

{"title":"High-performance Mo2Ti2C3Tx/MoS2 hybrid electrocatalyst for sustainable hydrogen production","authors":"Abdul Hanan , Arshid Numan , Muhammad Norhaffis Mustafa , Rashmi Walvekar , Mohammad Khalid","doi":"10.1016/j.ijhydene.2025.150533","DOIUrl":"10.1016/j.ijhydene.2025.150533","url":null,"abstract":"<div><div>Hydrogen (H<sub>2</sub>) is widely regarded as a clean and sustainable energy carrier with the potential to mitigate environmental challenges associated with fossil fuel consumption. However, the scalability of electrochemical water splitting (EWS) for H<sub>2</sub> production is constrained by the high cost and limited availability of efficient electrocatalysts such as platinum (Pt), which are critical for driving the hydrogen evolution reaction (HER). To address these challenges, there is growing interest in developing cost-effective, earth-abundant alternatives to precious metal-based electrocatalysts. In this study, we report the design and synthesis of a novel composite electrocatalyst comprising a double transition metal (DTM) MXene molybdenum titanium carbide (Mo<sub>2</sub>Ti<sub>2</sub>C<sub>3</sub>T<sub>x</sub>) integrated with molybdenum disulfide (MoS<sub>2</sub>) for HER in alkaline media. By systematically optimizing the MoS<sub>2</sub>-to-MXene ratio, we identified the composite formulation MMS-2 as the most effective, achieving an overpotential of 298 mV at a current density of 10 mA/cm<sup>2</sup>. Additionally, MMS-2 exhibited a high electrochemical active surface area (ECSA) of 195 cm<sup>2</sup> and demonstrated exceptional stability, maintaining a consistent performance over 24 h at 10, 20, and 30 mA/cm<sup>2</sup> current densities. These results highlight the potential of the MMS-2 composite as a durable and effective electrocatalyst for advancing sustainable H<sub>2</sub> production technologies.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"161 ","pages":"Article 150533"},"PeriodicalIF":8.3,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722954","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

Optimizing hydrogen production via tailings coal-assisted water electrolysis using GA-BP neural network 基于GA-BP神经网络的尾矿煤助水电解制氢优化研究

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-07-28 DOI: 10.1016/j.ijhydene.2025.150630

Huiyu Shang , Keqi Guo , Fan Yu , Yuepeng Li , Xuesong Yang , Bobo Zhou , Zhe Li , Yaowen Xing , Xiahui Gui

{"title":"Optimizing hydrogen production via tailings coal-assisted water electrolysis using GA-BP neural network","authors":"Huiyu Shang , Keqi Guo , Fan Yu , Yuepeng Li , Xuesong Yang , Bobo Zhou , Zhe Li , Yaowen Xing , Xiahui Gui","doi":"10.1016/j.ijhydene.2025.150630","DOIUrl":"10.1016/j.ijhydene.2025.150630","url":null,"abstract":"<div><div>Flotation tailings coal, a carbon-rich byproduct from coal beneficiation, offers significant potential as an oxidized species at the anode for efficient hydrogen production via water electrolysis. However, conventional coal-assisted water electrolysis (CAWE) typically suffers from low anodic carbon oxidation reaction (COR) current densities (<10 mA/cm<sup>2</sup>) at low potentials (≤1.2 V vs. RHE), severely limiting practical implementation. This study presents an optimized electrochemical hydrogen production process from tailings coal using a genetic algorithm-backpropagation (GA-BP) neural network. Box-Behnken design (BBD) experiments established the relationship between key operational parameters—coal concentration, sulfuric acid concentration, and stirring speed—and the resulting anodic current density. The optimized GA-BP model achieved excellent predictive accuracy, validated by a relative error of only 2.1 % compared to experimental data. Optimal conditions determined by the model (1.85 mol/L H<sub>2</sub>SO<sub>4</sub>, 0.37 g/mL coal concentration, 1156 rpm stirring speed) enabled a remarkable current density of 143.18 mA/cm<sup>2</sup> at 1.07 V vs. RHE, representing a 27.8-fold enhancement over conventional conditions. Feature importance analysis indicated coal concentration as the most influential parameter (49.82 %), followed by acid concentration (29.07 %) and stirring speed (21.11 %). This research highlights a highly effective strategy for maximizing hydrogen production efficiency from coal processing wastes, providing an innovative and sustainable approach toward cleaner energy production.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"160 ","pages":"Article 150630"},"PeriodicalIF":8.1,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713617","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

Self-assembled high performance composite air electrodes for proton-conducting reversible solid oxide cell 用于质子传导可逆固体氧化物电池的自组装高性能复合空气电极

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-07-28 DOI: 10.1016/j.ijhydene.2025.150657

Yitong Li , Xucong Liu , Chenghao Yang , Jing Wang , Ao Hu , Lu Zou , Jian Pu , Bo Chi

{"title":"Self-assembled high performance composite air electrodes for proton-conducting reversible solid oxide cell","authors":"Yitong Li , Xucong Liu , Chenghao Yang , Jing Wang , Ao Hu , Lu Zou , Jian Pu , Bo Chi","doi":"10.1016/j.ijhydene.2025.150657","DOIUrl":"10.1016/j.ijhydene.2025.150657","url":null,"abstract":"<div><div>Proton-conducting reversible solid oxide cell (P-RSOC) has attracted extensive attention due to its high efficiency at low and intermedium temperatures (400–700 °C), reversibility and chemical stability in energy conversion. However, the sluggish kinetics and insufficient stability of air electrodes remain key bottlenecks restricting the development of P-RSOC. To meet the requirements of air electrodes for P-RSOC applications, the incorporation of secondary-phase materials to enhance the catalytic performance of the pure material represents a promising and effective strategy. In this work, self-assembled PrBa<sub>0.8</sub>Ca<sub>0</sub><sub>·</sub><sub>2</sub>Fe<sub>0</sub><sub>·</sub><sub>4</sub>Co<sub>1</sub><sub>·</sub><sub>6</sub>O<sub>5+δ</sub>+Pr<sub>2</sub>O<sub>3</sub> (PBCFC–P) and PrBa<sub>0.8</sub>Ca<sub>0</sub><sub>·</sub><sub>2</sub>Fe<sub>0</sub><sub>·</sub><sub>4</sub>Co<sub>1</sub><sub>·</sub><sub>6</sub>O<sub>5+δ</sub>+NiO (PBCFC–N) composite air electrodes are investigated. The results reveal that the PBCFC-N composite electrode demonstrates superior performance at lower temperatures (<600 °C). In fuel cell (FC) mode, the cell with PBCFC-N air electrode achieves maximum power density of 0.433 W/cm<sup>2</sup> at 550 °C. While in electrolysis cell (EC) mode, the cell also exhibits excellent electrolysis performance with current density of 0.770 A/cm<sup>2</sup> under 1.3 V at 550 °C. Moreover, in reversible operation mode, the cell maintains stable performance for up to 200 h at 600 °C, further demonstrating the stability of the PBCFC-N composite electrode. These findings offer valuable insights into design and development of efficient and stable composite air electrode materials for P-RSOC.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"160 ","pages":"Article 150657"},"PeriodicalIF":8.1,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713618","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

Impact of antifreeze shut-down strategy on performance degradation and freeze start of a proton exchange membrane fuel cell system 防冻停机策略对质子交换膜燃料电池系统性能下降和冻结启动的影响

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-07-28 DOI: 10.1016/j.ijhydene.2025.150531

G. Montaner Ríos , F. Becker , J. Schirmer , C. Gentner , A. Ansar

{"title":"Impact of antifreeze shut-down strategy on performance degradation and freeze start of a proton exchange membrane fuel cell system","authors":"G. Montaner Ríos , F. Becker , J. Schirmer , C. Gentner , A. Ansar","doi":"10.1016/j.ijhydene.2025.150531","DOIUrl":"10.1016/j.ijhydene.2025.150531","url":null,"abstract":"<div><div>Proton exchange membrane fuel cell (PEMFC) systems for heavy-duty applications must operate in cold environments and guarantee durability. This work investigates the influence of methanol solution on performance degradation and freeze-start behavior of a 4 kW PEMFC system. Antifreeze and gas purging shut-down strategies are tested, starting from +3 °C to −20 °C, using 25 and 40 vol % methanol and two stacks with different performance degradation. Results show that methanol has a washing effect on the cells, regenerating performance and leading to negative degradation rates after multiple freeze starts. Moreover, methanol prevents ice formation during subzero storage and ensures reliable freeze starts; the lower the temperature and the higher the methanol concentration, the slower the start-up. Although gas purging yields faster freeze starts, antifreeze start-up time can be optimized, e.g., by oxygen enrichment. This study introduces a novel method to extend PEMFC lifetime while enabling efficient and reliable freeze starts from −40 °C.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"158 ","pages":"Article 150531"},"PeriodicalIF":8.1,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714561","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

Strong electron-coupled integrated WS2/ZnCdS nanoparticles for enhanced photocatalytic hydrogen evolution 强电子耦合集成WS2/ZnCdS纳米颗粒增强光催化析氢

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-07-28 DOI: 10.1016/j.ijhydene.2025.150318

Haiyan Yang , Wenjie Guo , Zhenyi Xu , Houxiang Sun , Furong Li , Ni Liao , Huabing Zhang , Yeonggil Kim , Zhiqiang Jiang

{"title":"Strong electron-coupled integrated WS2/ZnCdS nanoparticles for enhanced photocatalytic hydrogen evolution","authors":"Haiyan Yang , Wenjie Guo , Zhenyi Xu , Houxiang Sun , Furong Li , Ni Liao , Huabing Zhang , Yeonggil Kim , Zhiqiang Jiang","doi":"10.1016/j.ijhydene.2025.150318","DOIUrl":"10.1016/j.ijhydene.2025.150318","url":null,"abstract":"<div><div>The development of efficient hydrogen production catalysts, by implementing co-catalyst loading strategies and thus regulating photogenerated electron-transfer pathways represents a promising approach to advance the development of hydrogen energy. A simple hydrothermal method is used to integrate WS<sub>2</sub>, which exhibits a strong electron coupling effect, as a co-catalyst with ZnCdS nanoparticles, obtaining WS<sub>2</sub>/ZnCdS nanoparticles that exhibit excellent photocatalytic activity in hydrogen evolution. The internal electric field established between WS<sub>2</sub> and ZnCdS, along with the second-order electron-transfer pathways, facilitates the transfer of photogenerated electrons. Moreover, the inherent strong electron coupling effect in WS<sub>2</sub> promotes the accelerated separation of e<sup>−</sup>−h<sup>+</sup> pairs, owing to which the H<sub>2</sub> evolution rate of the WS<sub>2</sub>/ZnCdS nanoparticles reaches 5.30 mmol g<sup>−1</sup>·h<sup>−1</sup>, which is 22.1 and 2.55 times higher than those of CdS and ZnCdS nanoparticles, respectively. Furthermore, electron paramagnetic resonance and transient photocurrent spectroscopic investigations confirm that the increased H<sub>2</sub> yield could also be attributed to increase in both the number of active sites and photogenerated electrons within the WS<sub>2</sub>/ZnCdS nanoparticles. This study provides valuable insights on WS<sub>2</sub> as a co-catalyst for efficient photocatalytic hydrogen production.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"160 ","pages":"Article 150318"},"PeriodicalIF":8.3,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144721493","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

Ru-modified NiFe2O4/NiO heterojunction for high-performance alkaline hydrogen evolution ru修饰的NiFe2O4/NiO异质结用于高性能碱性析氢

IF 8.3 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-07-28 DOI: 10.1016/j.ijhydene.2025.150590

Fu Chen , Zhihan Huang , Muhammad Humayun , Yuxiao Liu , Kai Zhao , Linchao Yao , Mohamed Bououdina , Sadegh Rostamnia , Xinying Xue , Huaming Zhang , Chundong Wang

{"title":"Ru-modified NiFe2O4/NiO heterojunction for high-performance alkaline hydrogen evolution","authors":"Fu Chen , Zhihan Huang , Muhammad Humayun , Yuxiao Liu , Kai Zhao , Linchao Yao , Mohamed Bououdina , Sadegh Rostamnia , Xinying Xue , Huaming Zhang , Chundong Wang","doi":"10.1016/j.ijhydene.2025.150590","DOIUrl":"10.1016/j.ijhydene.2025.150590","url":null,"abstract":"<div><div>Precious metals like Pt, Ir, and Ru are highly efficient catalysts for the hydrogen evolution reaction (HER) in acidic environments; however, their efficiency significantly decreases in alkaline environments due to the slow kinetics of water dissociation. Doping and interface engineering have emerged as effective ways to improve water-splitting performance. This study introduces a novel Ru-doped flower-like heterostructure catalyst (Ru-NiFe<sub>2</sub>O<sub>4</sub>/NiO) vertically grown on nickel foam (NF) via a simple hydrothermal method followed by annealing. The improved catalyst derives advantages from electronic structure modulation, a hierarchical nanosheet architecture rich in active sites, and tailored hydrogen adsorption characteristics. As a result, Ru-NiFe<sub>2</sub>O<sub>4</sub>/NiO demonstrates remarkable HER activity, exhibiting overpotentials of merely 17 mV and 78 mV at current densities of 10 and 100 mA cm<sup>−2</sup>, respectively, alongside a low Tafel slope of 37.98 mV dec<sup>−1</sup>, surpassing that of commercial 20 % Pt/C. An assembled alkaline electrolyzer utilizing Ru-NiFe<sub>2</sub>O<sub>4</sub>/NiO‖NiFe achieves a cell voltage of 1.513 V and maintains stable operation for over 30 h at a current density of 10 mA cm<sup>−2</sup>, surpassing the RuO<sub>2</sub>‖Pt/C benchmark (1.62 V). This study presents an effective approach for the development of efficient HER catalysts through heterostructure engineering and noble metal doping.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"161 ","pages":"Article 150590"},"PeriodicalIF":8.3,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722797","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