International Journal of Hydrogen Energy最新文献_第5页

La0.3Sr0.7Ti0.3Fe0.7O3-δ derived from Malaysian ilmenite and monazite for application of solid oxide fuel cell cathode 从马来西亚钛铁矿和独居石中提取的 La0.3Sr0.7Ti0.3Fe0.7O3-δ 在固体氧化物燃料电池阴极中的应用

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2024-11-16 DOI: 10.1016/j.ijhydene.2024.11.206

Muhammad Zaid Ahmad , Sahrim Haji Ahmad , Ruey Shan Chen , Aznan Fazli Ismail , Mahendra Rao Somalu , Roshasnorlyza Hazan

This study investigates the effect of using low-purity oxides in synthesizing lanthanum strontium titanate ferrite (LSTF) on its electrochemical performance as a solid oxide fuel cell (SOFC) cathode material. Lanthanum oxide at 30% and 60% purity is extracted from monazite, and iron oxide at 70% and 90% purity is extracted from ilmenite as the LSTF precursor. Symmetrical pellets are fabricated from yttria-stabilized zirconia (YSZ) as the electrolyte, samarium-doped ceria (SDC) as the buffer layer, and silver paste as the current-collecting layer (CCL). Results from electrochemical impedance spectroscopy (EIS) demonstrate that LSTF made from extracted lanthanum with low purity shows comparable electrical performance with a polarity resistance (Rp) of below 0.2 Ω at operational temperature of 800 °C compared to LSTF made from commercial ingredients, while LSTF made from extracted iron shows equal performance only with high-purity ingredients. LSTF made with extracted lanthanum and iron exhibits an Rp of 0.5 Ω and does not show comparable performance with LSTF made with commercial ingredients, likely due to a high variety of impurities. Based on this study, LSTFLa30 and LSTFFe90 show high potential for SOFC cathode applications at operating temperatures in the range of 700–800 °C.

本研究探讨了在合成钛酸镧锶铁氧体（LSTF）时使用低纯度氧化物对其作为固体氧化物燃料电池（SOFC）阴极材料的电化学性能的影响。作为 LSTF 的前驱体，从独居石中提取了纯度分别为 30% 和 60% 的氧化镧，从钛铁矿中提取了纯度分别为 70% 和 90% 的氧化铁。以钇稳定氧化锆（YSZ）为电解质，掺钐铈（SDC）为缓冲层，银浆为集流层（CCL），制成了对称的颗粒。电化学阻抗光谱（EIS）结果表明，与使用商业成分制成的 LSTF 相比，使用低纯度萃取镧制成的 LSTF 在 800 °C 工作温度下的电气性能相当，极性电阻（Rp）低于 0.2 Ω，而使用高纯度成分萃取铁制成的 LSTF 性能相当。用提取的镧和铁制成的 LSTF 的 Rp 为 0.5 Ω，其性能无法与用商业成分制成的 LSTF 相提并论，这可能是由于杂质种类较多所致。根据这项研究，LSTFLa30 和 LSTFFe90 在工作温度为 700-800 ℃ 的 SOFC 阴极应用中显示出巨大的潜力。

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引用次数: 0

Techno-economic assessment of liquid carrier methods for intercontinental shipping of hydrogen: A case study 氢气洲际运输液体载体方法的技术经济评估：案例研究

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2024-11-16 DOI: 10.1016/j.ijhydene.2024.11.205

Anna Peecock , Ben Hull-Bailey , Astley Hastings , Alfonso Martinez-Felipe , Lawrence B. Wilcox

As global economies seek to transition to low-carbon energy systems to achieve net zero targets, hydrogen has potential to play a key role to decarbonise sectors that are unsuited to electrification or where long-term energy storage is required. Hydrogen can also assist in enabling decentralized renewable power generation to satisfy higher electricity demand to match the scale-up of electrified technologies. In this context, suitable transport, storage, and distribution networks will be essential to connect hydrogen generation and utilisation sites. This paper presents a techno-economic impact evaluation of international marine hydrogen transportation between Canada and the Netherlands, comparing liquid hydrogen, ammonia, and a dibenzyl toluene liquid organic hydrogen carrier (LOHC) as potential transport vectors. Economic costs, energy consumption and losses in each phase of the transportation system were analysed for each vector. Based on the devised scenarios, our model suggests levelised costs of hydrogen of 6.35–9.49 $₂₀₂₂/kg_H2 and pathway efficiencies of 55.6–71.9%. While liquid hydrogen was identified as the most cost-competitive carrier, sensitivity analysis revealed a merit order for system optimisation strategies, based upon which LOHC could outperform both liquid hydrogen and ammonia in the future.

随着全球各经济体努力向低碳能源系统过渡，以实现净零排放目标，氢气有可能在那些不适合电气化或需要长期能源储存的行业中发挥关键作用。氢气还能帮助分散式可再生能源发电满足更高的电力需求，以配合电气化技术的推广。在这种情况下，合适的运输、储存和分配网络对于连接氢气生产和利用场所至关重要。本文对加拿大和荷兰之间的国际海洋氢运输进行了技术经济影响评估，比较了作为潜在运输载体的液氢、氨和二苄基甲苯液态有机氢载体（LOHC）。分析了每种载体在运输系统各阶段的经济成本、能源消耗和损失。根据设计的方案，我们的模型表明氢气的平准化成本为 6.35-9.49 2022 美元/kgH2，路径效率为 55.6-71.9%。虽然液氢被认为是最具成本竞争力的载体，但敏感性分析表明了系统优化策略的优劣顺序，在此基础上，未来 LOHC 的表现可能会优于液氢和氨。

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引用次数: 0

Synergistic insights into the electrocatalytic mechanisms of ZIF-derived Co3S4 on 1T-WS2/WO3 for electrochemical water splitting 对 ZIF 衍生的 Co3S4 在 1T-WS2/WO3 上用于电化学水分离的电催化机制的协同见解

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2024-11-16 DOI: 10.1016/j.ijhydene.2024.11.098

Nimisha Baby , Nagaraj Murugan , Sadhasivam Thangarasu , Yoong Ahm Kim , Tae-Hwan Oh

Designing a highly effective bifunctional electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is a sensible approach for generating enormous hydrogen fuel by electrochemical water splitting. Herein, a high performance of ZIF-derived Co₃S₄ on WS₂-WO₃ electrocatalyst was developed for overall water splitting reactions. For developing the mixed phase of WS₂-WO₃, thioacetamide (TAA) played a crucial role as a sulfur source and acted as intercalating agent for expanding the layers of 1T WS₂ via the possible generation of NH₄⁺ ion. The high electrocatalytic performances is attained by the homogeneous incorporation and tunable properties of nano-sized Co₃S₄ on WS₂-WO₃. The electrocatalyst showed remarkable HER performance with an overpotential of only 73 mV and good OER efficiency with an overpotential of 307 mV at 10 mA/cm². The long term chronopotentiometry and CV cycles performances convinces the stability of the electrocatalysts. A reasonable two-electrode overall water splitting performance was achieved by the WS₂-WO₃/Co₃S₄ electrocatalyst in an asymmetric device, paving the path for more developments in the design and optimization of electrocatalysts for renewable energy conversion.

设计一种用于氢进化反应（HER）和氧进化反应（OER）的高效双功能电催化剂，是通过电化学水分离产生大量氢燃料的明智方法。在此，我们在 WS2-WO3 上开发了一种用于整体水分离反应的高性能 ZIF 衍生 Co3S4 电催化剂。在开发 WS2-WO3 混合相时，硫代乙酰胺（TAA）作为硫源发挥了关键作用，并作为插层剂通过可能产生的 NH4+ 离子扩大了 1T WS2 的层。纳米级 Co3S4 在 WS2-WO3 上的均匀掺杂和可调特性实现了高电催化性能。该电催化剂具有显著的 HER 性能，过电位仅为 73 mV；在 10 mA/cm2 的条件下，OER 效能良好，过电位为 307 mV。长期的定时电位计和 CV 循环性能证明了电催化剂的稳定性。在不对称装置中，WS2-WO3/Co3S4 电催化剂实现了合理的双电极整体水分离性能，为设计和优化用于可再生能源转换的电催化剂铺平了道路。

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引用次数: 0

Biohydrogen production in bioreactors: Global trends, key factors, and emerging directions 生物反应器中的生物氢生产：全球趋势、关键因素和新兴方向

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2024-11-16 DOI: 10.1016/j.ijhydene.2024.11.168

Wladilson Alves Martins , Francisco Simão Neto , Patrick da Silva Sousa , Israel Oliveira Cavalcante , Jessica Lopes da Silva , Rafael Leandro Fernandes Melo , Rita Karolinny Chaves de Lima , Rodrigo da Silva Vieira , Francisco Izaias da Silva Aires , José Cleiton Sousa dos Santos

This study delves into the burgeoning realm of biohydrogen production from renewable resources, with a particular focus on the role of bioreactors in addressing the worldwide demand for sustainable energy. It highlights the importance of selecting appropriate microorganisms, optimizing cultivation conditions, and designing efficient bioreactors. The research demonstrates how utilizing agricultural and industrial waste can substantially cut greenhouse gas emissions. A bibliometric analysis shows a marked increase in publications, with China initially at the forefront, though India is rapidly gaining ground. While China leads regarding the H-index and citations, notable contributions come from India and South Korea. Funding from agencies in China and Brazil, as are contributions from specific scientific journals, is crucial. Co-authorship and co-citation analysis pinpoint key researchers and collaborative networks. Moreover, keyword trends like "dark fermentation," "Enterobacter aerogenes," and "lignocellulosic biomass" indicate evolving research directions. Overall, the findings highlight China's dominance in the field and offer strategic insights into future developments in biohydrogen production for cleaner energy solutions.

本研究深入探讨了利用可再生资源生产生物氢这一新兴领域，尤其关注生物反应器在满足全球对可持续能源需求方面的作用。它强调了选择适当微生物、优化培养条件和设计高效生物反应器的重要性。研究表明，利用农业和工业废弃物可以大幅减少温室气体排放。文献计量学分析表明，论文数量显著增加，中国最初处于领先地位，但印度正在迅速崛起。虽然中国在 H 指数和引文方面领先，但印度和韩国也做出了显著贡献。中国和巴西机构的资助以及特定科学期刊的贡献至关重要。合著和合引分析可以确定关键研究人员和合作网络。此外，"黑暗发酵"、"产气肠杆菌 "和 "木质纤维素生物质 "等关键词趋势也表明了不断发展的研究方向。总之，研究结果凸显了中国在该领域的主导地位，并为未来清洁能源解决方案生物制氢的发展提供了战略性见解。

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引用次数: 0

Performance analysis of metal hydride heat pump system with CFD modelling development and actual reactor designs 利用 CFD 建模开发和实际反应器设计对金属氢化物热泵系统进行性能分析

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2024-11-16 DOI: 10.1016/j.ijhydene.2024.11.204

X.Y. Zhang, Y.T. Ge

Hydrogen and metal hydride reactions in a decarbonized heat pump system with low-grade waste heat recovery offer a promising path for sustainable energy storage and conversion. Based on actual metal hydride reactor designs, this study developed a 2D transient Computational Fluid Dynamics (CFD) model for such a heat pump system working with hydrogen and a metal hydride alloy pair of Zr_0.9Ti_0.1Cr_0.6Fe_1.4 and LaNi_4.25Al_0.75. The effects of operating temperatures on the coefficient of performance (COP) and specific heat power (SHP) of the system have been presented and analyzed. Subsequently, raising the medium-temperature heat sink (T_M) from 358.15 K to 373.15 K, and low-temperature heat source (T_L) from 308.15 K to 323.15 K, results in a decrease in the COP by 25.57%, and an increase in the COP by 38.2%, respectively. An optimum value of high-temperature heat source (T_H) exists at 493.15 K for a maximum COP. In addition, the higher thermal conductivity increases the absorption and desorption capacity of hydrogen.

在具有低品位余热回收功能的脱碳热泵系统中进行氢和金属氢化物反应，为可持续能源储存和转换提供了一条前景广阔的途径。本研究以实际的金属氢化物反应器设计为基础，为使用氢气和 Zr0.9Ti0.1Cr0.6Fe1.4 和 LaNi4.25Al0.75 金属氢化物合金的热泵系统开发了二维瞬态计算流体动力学（CFD）模型。研究分析了工作温度对系统性能系数（COP）和比热功率（SHP）的影响。随后，中温散热器 (TM) 从 358.15 K 提高到 373.15 K，低温热源 (TL) 从 308.15 K 提高到 323.15 K，分别导致 COP 下降 25.57%，COP 上升 38.2%。高温热源 (TH) 的最佳值为 493.15 K，以获得最大 COP。此外，较高的热导率还能提高氢气的吸收和解吸能力。

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引用次数: 0

In situ observation and kinetic modeling of the fundamental mechanisms underlying hydrogen sorption in forged Mg–Mg2Ni composites 锻造镁-镁-2镍复合材料中氢吸附基本机制的原位观测和动力学建模

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2024-11-16 DOI: 10.1016/j.ijhydene.2024.11.118

Jing Wen , Patricia de Rango , Nathalie Allain , Marc Novelli , Thierry Grosdidier , Laetitia Laversenne

While Mg–Mg₂Ni composites are promising for hydrogen storage, their implementation is hindered by our incomplete understanding of absorption/desorption kinetics. Here, we combine in situ neutron diffraction with kinetic and microstructural analyses to uncover the sorption mechanism of deuterated hydrogen D₂ in a Mg–Mg₂Ni composite processed by fast forging. Phase transitions upon first absorption are found to be different from subsequent absorptions. The first absorption involves rapid formation of Mg₂NiD_0.3-x followed by simultaneous formation of MgD₂ and Mg₂NiD₄. Kinetic modeling indicates that surface nucleation of the magnesium hydride is rate-limiting. Subsequent absorptions involve two phases, Mg and Mg₂NiD_0.3-x, which promote absorption. Kinetic modeling and microstructure analysis indicate that (1) MgD₂ nucleation occurs at the Mg–Mg₂NiD_0.3-x interface and (2) Mg₂NiD₄ formation is kinetically controlled by deuterium diffusion through the growing Mg₂NiD₄ plate. In all desorptions, deuterium release starts by rapid decomposition of Mg₂NiD₄ into Mg₂NiD_0.3-x, followed by slower MgD₂ decomposition.

虽然镁-镁-Mg2Ni 复合材料在储氢方面大有可为，但由于我们对吸收/解吸动力学的不完全了解，阻碍了其应用。在这里，我们将原位中子衍射与动力学和微结构分析相结合，揭示了通过快速锻造处理的镁-镁-镍复合材料中氘化氢 D2 的吸附机制。研究发现，第一次吸收时的相变不同于随后的吸收。第一次吸收时，Mg2NiD0.3-x 迅速形成，随后 MgD2 和 Mg2NiD4 同时形成。动力学模型表明，氢化镁的表面成核是限制速率的因素。随后的吸收涉及镁和 Mg2NiD0.3-x 两相，它们促进了吸收。动力学建模和微观结构分析表明：(1) MgD2 的成核发生在 Mg-Mg2NiD0.3-x 界面；(2) Mg2NiD4 的形成在动力学上受通过生长的 Mg2NiD4 板的氘扩散的控制。在所有解脱过程中，氘的释放始于 Mg2NiD4 快速分解为 Mg2NiD0.3-x，然后是 MgD2 缓慢分解。

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引用次数: 0

Non-adiabatic effect on NOx emissions for premixed H2-blended NH3/air combustion under rich-lean-staged conditions 在富余-贫乏阶段条件下，预混 H2 混合 NH3/ 空气燃烧的非绝热效应对氮氧化物排放的影响

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2024-11-16 DOI: 10.1016/j.ijhydene.2024.11.164

Zhaoxing Li, Yang Zhang, Hai Zhang

The non-adiabatic effect on NOx emission for the swirl premixed NH₃/H₂/air combustion under fuel-rich/quick-mix/fuel-lean (RQL) conditions was experimentally studied. The wall temperature of the quartz combustor was controlled by surrounding heating. Results showed that both H₂-blending and thermal insulation were in favor of enlarging the low-NOx range and lowering the valley NOx, due to the less NO and unburnt NH₃, and smaller flow rate from the primary stage. In the post-flame zone of the primary stage, increasing combustion temperature significantly enhanced NO reduction, Thus, for low NOx emission, it is essential to keep enough thermal insulation there. Experimental measurements also found remarkable N₂O could be formed in the secondary stage when combustion temperature was low and much unburnt NH₃ was excessive. Kinetic analyses showed this phenomenon was due to the high combination rate of NH and NO, and low reduction rate of H radical.

实验研究了在燃料丰富/快速混合/燃料贫乏（RQL）条件下，漩涡预混合 NH3/H2/air 燃烧对氮氧化物排放的非绝热影响。石英燃烧器的壁温由周围加热控制。结果表明，由于氮氧化物和未燃烧的 NH3 较少，以及初级阶段的流速较小，H2 混合和隔热都有利于扩大低氮氧化物范围和降低氮氧化物谷值。在初级燃烧阶段的后火焰区，燃烧温度的升高显著提高了氮氧化物的减少量，因此，为了实现低氮氧化物排放，必须在该区域保持足够的隔热性能。实验测量还发现，当燃烧温度较低且未燃烧的 NH3 过多时，二级燃烧区会形成显著的 N2O。动力学分析表明，造成这种现象的原因是 NH 和 NO 的结合率高，而 H 自由基的还原率低。

引用次数: 0

Impact of petroleum versus bio-based nano/microplastics on fermentative biohydrogen production from sludge 石油与生物基纳米/微塑料对污泥发酵生物制氢的影响

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2024-11-16 DOI: 10.1016/j.ijhydene.2024.11.064

Monisha Alam, Alsayed Mostafa, Bipro Ranjan Dhar

Biohydrogen production via dark fermentation offers a promising route for waste-to-bioenergy. The impact of emerging contaminants like microplastics (MPs) and nanoplastics (NPs) in the waste on fermentative hydrogen production has not been thoroughly examined. Notably, a systematic comparison between petroleum-based and bio-based MPs/NPs in the hydrogen fermentation process has not yet been explored. We investigated the effects of petroleum-derived polyethylene MPs, polyvinyl chloride MPs, polystyrene NPs, and bio-based polyhydroxy butyrate and polylactic acid MPs, at low and high concentrations, on hydrogen production from primary sludge. Inhibition of hydrogen production ranged from 8.2% to 82.4%, with high concentrations of petro-based MPs/NPs causing more significant inhibition. Bio-based MPs exhibited lower inhibition compared to petro-based MPs/NPs. PsNPs at 0.3 mg/L exhibited the highest inhibition, accompanied by the highest increase (77.3%) in reactive oxygen species compared to the control. High levels of MPs/NPs increased extracellular polymeric substance production, indicating a protective response to toxicity. These findings highlight the importance of studying how emerging MPs/NPs pollutants in wastewater sludge impact fermentative hydrogen production and sludge properties.

通过暗发酵生产生物氢为废物变生物能源提供了一条前景广阔的途径。废物中新出现的污染物，如微塑料（MPs）和纳米塑料（NPs）对发酵制氢的影响尚未得到深入研究。值得注意的是，在氢气发酵过程中，尚未对石油基和生物基 MPs/NPs 进行系统比较。我们研究了石油衍生的聚乙烯 MPs、聚氯乙烯 MPs、聚苯乙烯 NPs 以及生物基的聚羟基丁酸 MPs 和聚乳酸 MPs 在低浓度和高浓度下对初级污泥制氢的影响。产氢抑制率从 8.2% 到 82.4%不等，高浓度石油基 MPs/NPs 的抑制作用更为明显。与石油基 MPs/NPs 相比，生物基 MPs 的抑制率较低。与对照组相比，0.3 毫克/升的 PsNPs 表现出最高的抑制作用，同时活性氧也增加了最高（77.3%）。高浓度的 MPs/NPs 增加了细胞外聚合物质的产生，表明了对毒性的保护性反应。这些发现凸显了研究废水污泥中新出现的 MPs/NPs 污染物如何影响发酵产氢和污泥特性的重要性。

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引用次数: 0

Enhanced catalytic activity of NiSe2 by nanohybrid formation with CoO nanosheets towards overall electrocatalytic water splitting for clean energy 通过与 CoO 纳米片形成纳米杂化作用增强 NiSe2 的催化活性，实现清洁能源的整体电催化水分离

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2024-11-16 DOI: 10.1016/j.ijhydene.2024.11.147

Zahrah Alhalili , Mohammad Shariq , Noha Al-Qasmi , Othman Hakami , Hussain J. Alathlawi , Abdulrahman F. Alharbi , Ebtihal A. Mergani , Ezdehar A. Elghazali , Afaf I. Elghazali , Ibrahim Mahariq

Noble metal-free catalysts have recently attracted much attention towards overall electrochemical water splitting. However, poor kinetics of the reactions, involved in water splitting leads to lower hydrogen production in alkaline electrolytes. Hence, it is essential to design highly active, conductive and cost-efficient catalysts for water electrolysis. Therefore, a bifunctional electrocatalyst based on cobalt oxide (CoO) incorporated over nickel selenide (NiSe₂) supported on nickel foam (CoO/NiSe₂/NF) was synthesized via a two-step process involving hydrothermal and electrochemical deposition methods. The synthesized material was characterized thoroughly using XRD, XPS, SEM and FE-SEM. After thorough characterization, all the synthesized materials were employed as electrocatalysts towards overall water splitting. The electrochemical studies revealed that CoO/NiSe₂/NF has demonstrated excellent electrocatalytic activity towards overall electrochemical water splitting. The improved electrochemical activity of nano-hybrid could be attributed to heterogeneous structure, enhanced edge sites and the synergetic cooperation of CoO and NiSe₂. Finally, two electrode setups were prepared to perform overall water electrolysis in which CoO/NiSe₂/NF need a cell potential of 2.03 V to attain 100 mA cm⁻². The study proposes an approach for heterogeneous structure engineering to boost the catalytic performance of noble metal-free materials.

不含贵金属的催化剂最近在整体电化学水分离方面引起了广泛关注。然而，由于水分离反应的动力学性能较差，导致在碱性电解质中的产氢量较低。因此，设计高活性、高导电性和高成本效益的电解水催化剂至关重要。因此，通过水热法和电化学沉积法两步法合成了一种基于氧化钴（CoO）和硒化镍（NiSe2）的双功能电催化剂（CoO/NiSe2/NF）。利用 XRD、XPS、SEM 和 FE-SEM 对合成材料进行了全面表征。经过全面表征后，所有合成材料都被用作整体水分离的电催化剂。电化学研究表明，CoO/NiSe2/NF 在整体电化学水分离方面表现出卓越的电催化活性。纳米混合物电化学活性的提高可归因于异质结构、增强的边缘位点以及 CoO 和 NiSe2 的协同作用。最后，研究人员制备了两种电极设置来进行整体水电解，其中 CoO/NiSe2/NF 需要 2.03 V 的电池电位才能达到 100 mA cm-2。该研究提出了一种异质结构工程方法，以提高无贵金属材料的催化性能。

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引用次数: 0

Porous transport layers with low Pt loading having Nb–Ta alloy as interlayer for proton exchange membrane water electrolyzers 用于质子交换膜水电解槽的以 Nb-Ta 合金为中间层的低铂载量多孔传输层

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2024-11-16 DOI: 10.1016/j.ijhydene.2024.11.192

Leila Moradizadeh , Pramoth Varsan Madhavan , Yasin Mehdizadeh Chellehbari , Abhay Gupta , Xianguo Li , Samaneh Shahgaldi

Titanium (Ti), commercially used as substrate for porous transport layers (PTLs) in proton exchange membrane water electrolyzers (PEMWEs), tends to form passivating oxide layer, increasing interfacial contact resistance (ICR) and reducing performance and durability; practice of using precious metal coatings for mitigation significantly increases costs. This study investigates niobium-tantalum (Nb–Ta) alloys as cost-effective interlayer coatings on Ti-felt to reduce precious metal loading. Nb–Ta coated samples significantly increase corrosion potential, lower current densities by 3–4 orders of magnitude, reduce ICR by 3.5 times, and improve durability. The best performance sample with an ultra-low amount of platinum, shows 8 times greater durability, 12.5% reduction in ohmic resistance and 28% increase in current density at +2.0 V than the commercial PTL in a single cell stack. Improved contact angle, electrical, and thermal conductivity highlight Nb–Ta interlayer coatings for PTLs, offering a cost-effective strategy to enhance PEMWE performance and durability for green hydrogen production.

钛（Ti）是质子交换膜水电解槽（PEMWE）中多孔传输层（PTL）的商用基材，容易形成钝化氧化层，增加界面接触电阻（ICR），降低性能和耐用性；使用贵金属涂层进行缓解的做法大大增加了成本。本研究将铌钽（Nb-Ta）合金作为钛毡上具有成本效益的层间涂层，以减少贵金属负载。Nb-Ta 涂层样品可显著提高腐蚀电位，将电流密度降低 3-4 个数量级，将 ICR 降低 3.5 倍，并提高耐久性。与单电池堆中的商用 PTL 相比，超低铂含量的最佳性能样品的耐用性提高了 8 倍，欧姆电阻降低了 12.5%，+2.0 V 时的电流密度提高了 28%。PTL 的接触角、电导率和热导率的改善凸显了 Nb-Ta 层间涂层的优势，为提高 PEMWE 性能和耐用性以实现绿色制氢提供了一种具有成本效益的策略。

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引用次数: 0