Article
Chemistry, Multidisciplinary
Harini Gunda, Keith G. Ray, Leonard E. Klebanoff, Chaochao Dun, Maxwell A. T. Marple, Sichi Li, Peter Sharma, Raymond W. Friddle, Joshua D. Sugar, Jonathan L. Snider, Robert D. Horton, Brendan C. Davis, Jeffery M. Chames, Yi-Sheng Liu, Jinghua Guo, Harris E. Mason, Jeffrey J. Urban, Brandon C. Wood, Mark D. Allendorf, Kabeer Jasuja, Vitalie Stavila
Summary: Metal boride nanostructures have great potential for hydrogen storage applications. However, their synthesis is challenging due to high surface energy, strong bonding, and difficult surface termination. Mechanochemical exfoliation of magnesium diboride in zirconia produces ultrathin MgB2 nanosheets with high yield. High-pressure hydrogenation and dehydrogenation of these nanosheets reveal a hydrogen capacity 50 times larger than bulk MgB2. The enhancement is attributed to defective sites created by ball-milling and incomplete Mg surface coverage. The exfoliation and creation of ultrathin layers offer a promising direction for high-capacity hydrogen storage.
Article
Chemistry, Physical
Wojciech Wegner, Tomasz Jaron
Summary: Three novel organic derivatives of lanthanide borohydrides, n-But(4)NRE(BH4)(4) (TBAREB), RE = Ho, Tm, Yb, have been prepared using mechanochemical synthesis and purified via solvent extraction. Crystallographic studies revealed two polymorphic forms, alpha- and beta-TBAREB, adopting monoclinic and orthorhombic unit cells, respectively. Thermal decomposition of these compounds was investigated using TGA/DSC measurements, analysis of gaseous products with mass spectrometry, and analysis of solid decomposition products with PXRD.
Article
Materials Science, Multidisciplinary
Quanzheng Tao, Justinas Palisaitis, Youbing Li, Qing Huang, Per O. A. Persson, Johanna Rosen
Summary: This paper investigates the incorporation of magnetic rare earth elements into the chemically ordered transition metal borides structure. The results show that Mo4/3RE2/3AlB2 materials can potentially be used as a versatile platform for new magnetic materials.
MATERIALS RESEARCH LETTERS
(2022)
Article
Chemistry, Physical
Ting Wang, Kondo-Francois Aguey-Zinsou
Summary: Borohydride nanoparticles were synthesized successfully using a modified ternary anti-precipitation method. The addition of a co-solvent and the carbon chain length of the stabilising surfactant play crucial roles in controlling particle size. This method offers an effective and simple way to prepare nanosized borohydride particles for hydrogen storage, while reducing the contamination of hydrogen release caused by stabilising surfactants.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Muhammad Saad Salman, Yuwei Yang, Muhammad Zubair, Nicholas M. Bedford, Kondo-Francois Aguey-Zinsou
Summary: The core-shell approach provides a strategy to make complex hydrides reversible for hydrogen storage. The study designed freestanding core-shell NaBH4@Ni nanoarchitectures and investigated their hydrogen properties. The core-shell nanoarchitectures exhibited lower hydrogen release temperatures compared to bulk materials, suggesting potential catalytic applications.
Article
Nanoscience & Nanotechnology
Qiwen Lai, Chulaluck Pratthana, Yuwei Yang, Aditya Rawal, Kondo-Francois Aguey-Zinsou
Summary: The thermodynamic behavior of complex borohydrides confined in mesoporous hollow carbon spheres was investigated, showing no variation of equilibrium plateau pressure upon changes in the hydrogen sorption temperatures. This is interpreted as a result of the high pressure within the carbon nanopores, providing a means to control the thermodynamics of nanosized hydrides.
ACS APPLIED NANO MATERIALS
(2021)
Article
Engineering, Chemical
Laura Castro, Helena Gomez-Alvarez, Felisa Gonzalez, Jesus A. Munoz
Summary: Rare earth elements (REE) are vital for high-tech products and their environmentally friendly recycling methods are poorly studied. In this study, Aspergillus niger CECT2807 was used to leach REE from fluorescent phosphor powder in fluorescent tubes. The bioleaching experiments showed significant REE dissolution, with Y, Eu, Ce, Tb, and La concentrations reaching 122 mg/l, 8.50 mg/l, 0.95 mg/l, 0.40 mg/l, and 1.11 mg/l, respectively, after 7 days. The residues were analyzed using SEM and XRD, confirming the biotransformation of lamp powder. Semicontinuous experiments further demonstrated increased REE dissolution rate under static conditions, with extraction of 16.5 mg of Y and 0.75 mg of Eu per gram of fluorescent lamp powder.
MINERALS ENGINEERING
(2023)
Article
Engineering, Environmental
Xin Zhang, Wenxuan Zhang, Lingchao Zhang, Zhenguo Huang, Jianjiang Hu, Mingxia Gao, Hongge Pan, Yongfeng Liu
Summary: Synthesizing nanostructured lithium borohydride without any supports can effectively improve its hydrogen storage reversibility. The resulting nano-LiBH4 shows superior hydrogen desorption and absorption capacity under high temperature and pressure, mainly due to the effective suppression of foaming.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Rasmeet Singh
Summary: This article critically evaluates the effectiveness of different boron-based hydrides in hydrogen storage, discusses the challenges in practical applications, and emphasizes the importance of using new materials and strategies to address these issues.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Yuanyuan Shang, Ou Jin, Julian Atillio Puszkiel, Fahim Karimi, Palmarin Dansirima, Chongsutthamani Sittiwet, Rapee Utke, Siriwat Soontaranon, Thi Thu Le, Gokhan Gizer, Dorothee Vinga Szabo, Stefan Wagner, Christian Kuebel, Thomas Klassen, Martin Dornheim, Astrid Pundt, Claudio Pistidda
Summary: This study systematically investigates the effect of selected metal-based additives on the dehydrogenation properties of the reactive hydride composite (RHC) model system 2NaBH4+MgH2. The addition of 3TiCl3·AlCl3 enhances the dehydrogenation kinetics and changes the controlling mechanism of the second dehydrogenation step. Microstructural analysis using high-resolution transmission electron microscopy (HRTEM) reveals significant differences in the MgB2 morphology between the doped and undoped systems.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Inorganic & Nuclear
Jakob B. Grinderslev, Torben R. Jensen
Summary: Amine metal borohydrides exhibit extreme structural and compositional diversity, showing potential applications for solid-state hydrogen and ammonia storage as well as solid-state electrolytes. The research reports 32 new compounds and discusses trends in the full series of rare-earth metal borohydrides. The crystal structure and composition of the compounds are dependent on the volume of the rare-earth ion, and ammonia coordinates to the metal while BH4- acts as a flexible coordination.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Ren Zou, Jialing Li, Jirong Cui, Weijin Zhang, Gangtie Lei, Hujun Cao, Ping Chen
Summary: An organic solvent-assisted catalyst-free mechanochemical reaction is developed for synthesizing lithium hydride under mild gas pressures and room temperature. The formation of intermediates on the surface of bulk lithium metal is found crucial for achieving high purity (>98%) LiH synthesis. This provides a new strategy for large-scale production of lithium-based hydrogen storage materials.
CHEMICAL COMMUNICATIONS
(2023)
Article
Energy & Fuels
Juanjuan Ma, Shuyan Li, Jinxi Wang, Shuting Jiang, Balaji Panchal, Yuzhuang Sun
Summary: This study optimized the culture conditions and bioleaching process of Aspergillus niger for the extraction of rare earth elements (REEs) from coal fly ash (CFA). It was found that organic nitrogen sources influenced the morphology and acid production capacity of A. niger, with oxalic acid being the main acid secreted (4.05 mg/L). The initial pH value was identified as the most influential factor affecting the bioleaching process, and by optimizing it, a leaching rate of 30.91% for total REEs in CFA was achieved. The main mechanism of REEs bioleaching by A. niger from CFA was speculated to be proton exchange and organic ligand complexation.
Article
Chemistry, Physical
Shuang Gao, Shan Zhang, Yongcheng Li, Riming Hu, Zhonghao Heng, Xiaochuan Shi, Peipeng Jin, Jianglan Shui
Summary: Rare earth doping is an effective method to improve hydrogen storage properties of Mg-based alloys. This study investigates the effect of rare earth (Y, Ce, La, Sc) doping on the thermal stability, electronic property, and hydrogen adsorption/desorption behavior of Mg2Ni (010) surface using first principles calculations. The results show that rare earth doping in Mg2Ni (010) surface is thermodynamically feasible and improves hydrogen diffusion and desorption energies barriers, with Ce showing the best potential.
APPLIED SURFACE SCIENCE
(2023)
Article
Biotechnology & Applied Microbiology
Michael Paper, Max Koch, Patrick Jung, Michael Lakatos, Tom Nilges, Thomas B. Brueck
Summary: This study investigated the potential of 12 cyanobacterial strains for biosorption of rare earth elements, and Nostoc sp. 20.02 showed the highest adsorption capacity. Synechococcus elongatus UTEX 2973, Calothrix brevissima SAG 34.79, Desmonostoc muscorum 90.03, and Komarekiella sp. 89.12 were also promising strains. The adsorption of metals by the strains had fast kinetics and pH value had a significant impact on the process.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Article
Chemistry, Organic
P. J. Leszczynski, T. Jaron, P. J. Malinowski, J. Gawraczynski, Z. Mazej, W. Grochala
Summary: 9,9 '-bianthryl and 9,9 '-biphenanthryl were synthesized by direct oxidative C-C coupling using divalent silver sulfate Ag(II)SO4 at ambient temperature conditions. Despite low yields of 6-10%, they present a competitive advantage compared to more complex synthetic pathways due to their single-pot process and lower waste generation. X-ray structures of adducts revealed that the aromatic hydrocarbon guest molecules were accommodated in cavities formed by the host 9,9 '-bianthryl molecule, primarily stabilized by C-H···π interactions.
POLYCYCLIC AROMATIC COMPOUNDS
(2021)
Article
Chemistry, Physical
Wiktoria Dolebska, Tomasz Jaron
JOURNAL OF MOLECULAR STRUCTURE
(2020)
Article
Chemistry, Inorganic & Nuclear
Tomasz Jaron, Agnieszka Starobrat, Viktor V. Struzhkin, Wojciech Grochala
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2020)
Article
Chemistry, Physical
Wojciech Wegner, Tomasz Jaron
Summary: Three novel organic derivatives of lanthanide borohydrides, n-But(4)NRE(BH4)(4) (TBAREB), RE = Ho, Tm, Yb, have been prepared using mechanochemical synthesis and purified via solvent extraction. Crystallographic studies revealed two polymorphic forms, alpha- and beta-TBAREB, adopting monoclinic and orthorhombic unit cells, respectively. Thermal decomposition of these compounds was investigated using TGA/DSC measurements, analysis of gaseous products with mass spectrometry, and analysis of solid decomposition products with PXRD.
Article
Chemistry, Inorganic & Nuclear
Tomasz Jaron, Jianjun Ying, Marek Tkacz, Adam Grzelak, Vitali B. Prakapenka, Viktor V. Struzhkin, Wojciech Grochala
Summary: Researchers attempted to investigate hydrogenation of ytterbium using a diamond anvil cell and synchrotron powder X-ray diffraction. The results showed that although YbH2+x hydrides could form, there were no clear differences in the hydrogenation effects between systems compressed in H2 and inert gases. Electronic transport measurements revealed that Yb3H8 maintained its semiconducting character under high pressure.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Rafal Owarzany, Tomasz Jaron, Krzysztof Kazimierczuk, Przemyslaw J. Malinowski, Wojciech Grochala, Karol J. Fijalkowski
Summary: Attempts to synthesize the ionic compound (NH4)(BH3NH2BH2NH2BH3) via a metathetical approach resulted in a mixture of the target compound and a partially dehydrogenated molecular NH3BH2NH2BH2NH2BH3 product. Characterization of the mixed specimen was performed using NMR and vibrational spectroscopies, and the cocrystal structure was analyzed using powder X-ray diffraction data and density functional theory calculations. Despite their high hydrogen content, similar to ammonia borane, both compounds released hydrogen contaminated with borazine, as well as traces of ammonia and diborane.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Wojciech Wegner, Karol J. Fijalkowski
Summary: This study presents a new, scalable, wet-chemistry single-pot method for synthesising pure unsolvated organic derivatives of metal borohydrides. The metathetic reaction in a weakly coordinating solvent was exemplified by the synthesis of [(n-C4H9)(4)N][Y(BH4)(4)] and [Ph4P][Y(BH4)(4)] systems, with the crystal structure of the latter compound being solved and described. The organic borohydride salts obtained through this new method have various applications, such as serving as precursors in the synthesis of hydrogen-rich mixed-metal borohydrides, which are promising materials for solid-state chemical storage of hydrogen.
Article
Chemistry, Physical
Tomasz Jaron
Summary: Tetramethylphosphonium borohydride was synthesized in a weakly-coordinating aprotic environment through an ion metathesis reaction. Unlike related compounds, it has a distorted wurtzite structure and is more stable, decomposing at a lower temperature with only exothermic processes observed. Raman spectra and DFT calculations confirm the occurrence of a polymorphic transition and a phase transition to a high-pressure phase for [(CH3)(4)N]BH4.
Article
Chemistry, Physical
Michal Magott, Wojciech Wegner
Summary: Three new crystalline phases of borohydride complex were obtained and characterized, showing unusually slow field-induced magnetic relaxation at high temperatures, which can be attributed to the thermal dependence of the two-phonon Raman process.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Riccardo Piombo, Daniel Jezierski, Henrique Perin Martins, Tomasz Jaron, Maria N. Gastiasoro, Paolo Barone, Kamil Tokar, Przemyslaw Piekarz, Mariana Derzsi, Zoran Mazej, Miguel Abbate, Wojciech Grochala, Jose Lorenzana
Summary: AgF2 is proposed as a cuprate analog with strong correlation and marked covalence. Experimental and computational results indicate that AgF2 can be classified as a charge-transfer correlated insulator according to the Zaanen-Sawatzky-Allen classification scheme. This suggests that AgF2 may become a high-temperature superconductor if metallization is achieved by doping.
Article
Chemistry, Inorganic & Nuclear
Przemyslaw J. Malinowski, Vadim Zhuravlev, Tomasz Jaron, Gustavo Santiso-Quinones, Ingo Krossing
Summary: Weakly Coordinating Anions (WCAs) help in forming exotic 'naked' cationic species, with the feasibility of synthesis approaches dependent on solvent basicity. This study focuses on novel complexes of Ag(i) and Cu(i) stabilized by perfluorinated alkoxyaluminate, with Cu-SO2 adducts showing exceptional stability. Screening of potential ligands based on DFT calculations is proposed to expand the chemistry with WCAs.
DALTON TRANSACTIONS
(2021)
Article
Materials Science, Multidisciplinary
Tomasz Jaron, Vitali B. Prakapenka, Viktor V. Struzhkin
Summary: High-pressure investigation of As2Se3 using synchrotron x-ray powder diffraction with hydrogen and neon pressure media led to the observation of phase transformations and confirmation of the relative stability of experimentally detected crystalline phases.
Article
Chemistry, Physical
Wojciech Wegner, Kamil Tokar, Jose Lorenzana, Mariana Derzsi, Wojciech Grochala
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
Article
Chemistry, Inorganic & Nuclear
Wojciech Wegner, Karol J. Fijalkowski, Wojciech Grochala
DALTON TRANSACTIONS
(2020)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
