Article
Chemistry, Multidisciplinary
Javier Gainza, Federico Serrano-Sanchez, Oscar J. Dura, Norbert M. Nemes, Jose Luis Martinez, Maria Teresa Fernandez-Diaz, Jose Antonio Alonso
Summary: AgSbTe2 intermetallic compound is a promising thermoelectric material with excellent performance in LAST and TAGS alloys. The atomic ordering of Ag and Sb atoms greatly influences the electronic structure of the compound. Polycrystalline AgSbTe2 synthesized by arc-melting exhibits a nanostructured dense pellet morphology, with a layer thickness of approximately 25-30 nm. Anomalies in the transport properties around 600 K can be attributed to the onset temperature for atomic ordering. The average thermoelectric figure of merit remains stable at around 0.6 from 550 to 680 K.
Article
Materials Science, Ceramics
Miguel Angel Cobos, Patricia de la Presa, Ines Puente-Orench, Irene Llorente, Irene Morales, Asuncion Garcia-Escorial, Antonio Hernando, Jose Antonio Jimenez
Summary: Samples with different inversion parameter values were prepared through mechanical grinding and thermal annealing treatments, and characterized by X-ray, neutron diffraction, and magnetic measurements. The coexistence of short range antiferromagnetic and ferrimagnetic ordering at low temperature was confirmed for the first time, and a different magnetic phase diagram from previous reports was obtained.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Killian Henry, Jakob Voldum Ahlburg, Henrik L. Andersen, Cecilia Granados-Miralles, Marian Stingaciu, Matilde Saura-Muzquiz, Mogens Christensen
Summary: Powder X-ray diffraction (PXRD) and neutron powder diffraction (NPD) were used to study the crystal structure of CoFe2O4 nanoparticles prepared via different hydrothermal synthesis routes, focusing on accurately determining the spinel inversion degrees. The study showed that combining PXRD data from a Co source with NPD data provided a robust structural model. The reproducibility of the Rietveld refinement procedure was assessed, demonstrating minor differences between samples. Changing the heating rate and cobalt salt in the synthesis affected the crystal structure but not the Co/Fe occupancy and magnetic parameters. Overall, the chemical and parameter variations had minimal impact on the crystal and magnetic structure of the CoFe2O4 nanoparticles.
JOURNAL OF APPLIED CRYSTALLOGRAPHY
(2022)
Article
Chemistry, Inorganic & Nuclear
Alex J. Brown, Maxim Avdeev, Alicia Manjon-Sanz, Helen E. A. Brand, Chris D. Ling
Summary: Oxygen-deficient perovskite compounds with the formula Ba3RFe2O7.5 were studied to investigate magnetic interactions between Fe3+ 3d cations with and without unpaired 4f electrons on R3+ cations. The magnetic ground states were determined for R3+ = Y3+ (non-magnetic) and Dy3+ (4f9) using neutron powder diffraction data analysis and ab initio density functional theory calculations. Both compounds exhibited complex long-range ordered antiferromagnetic structures with the same magnetic space group Ca2/c (BNS #15.91) below TN = 6.6 and 14.5 K, respectively. The influence of f-electron magnetism was evident in temperature dependence and differences in ordered moment sizes on the Fe sites.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Nicolas Dubouis, Thomas Marchandier, Gwenaelle Rousse, Florencia Marchini, Francois Fauth, Maxim Avdeev, Antonella Iadecola, Benjamin Porcheron, Michael Deschamps, Jean-Marie Tarascon, Alexis Grimaud
Summary: Insertion compounds in layered oxide or sulfide electrodes provide the fundamental basis of current commercialized Li-ion batteries. The feasibility of reversibly intercalating Li+ electrochemically into halide compounds via the use of superconcentrated electrolytes is now demonstrated.
Article
Chemistry, Multidisciplinary
Alejandro Medina, Ana I. Rodriguez, Carlos Perez-Vicente, Ricardo Alcantara
Summary: Nanoparticles of MgMn2-yFeyO4 have been prepared to improve the electrochemical behavior by replacing Mn3+ ions, and the presence of Fe3+ ions is found to facilitate the exchange reaction of magnesium ions and inhibit the disproportionation process. Electrochemical behavior in non-aqueous magnesium cells has been studied.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Optics
Ashkan Ajeer, Jia C. Khong, Matthew D. Wilson, Robert M. Moss
Summary: Pixelated energy resolving detectors enable acquisition of X-ray diffraction (XRD) signals using hybrid energy-and angle-dispersive technique, potentially paving the way for the development of novel benchtop XRD imaging or computed tomography (XRDCT) systems, utilizing readily available polychromatic X-ray sources. In this work, a commercially available pixelated cadmium telluride (CdTe) detector, HEXITEC (High Energy X-ray Imaging Technology), was used to demonstrate such an XRDCT system. Specifically, a novel fly-scan technique was developed and compared to the established step-scan technique, reducing the total scan time by 42% while improving the spatial resolution, material contrast, and therefore the material classification.
Article
Chemistry, Physical
M. A. A. Mohamed, Mikhail V. Gorbunov, Martin Valldor, Silke Hampel, Nico Grassler, Daria Mikhailova
Summary: The substitution of sulfur with selenium in the (Li2Fe)SO cathode material has been studied, showing that increasing the selenium content leads to higher thermal stability and lower sensitivity to moisture. Among the compositions synthesized, (Li2Fe)S0.7Se0.3O exhibits the best electrochemical performance with a high discharge capacity and outstanding cycling stability. The material remains crystalline without the evolution of secondary phases or superstructures, showing enhanced structural stability compared to (Li2Fe)SO. Both cationic (Fe) and anionic (S/Se) redox processes are involved in the redox process of (Li2Fe)S0.7Se0.3O similar to (Li2Fe)SO.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Physical
Yunjian Chen, Jia Zhu, Ni Wang, Huanyu Cheng, Xianzhong Tang, Sridhar Komarneni, Wencheng Hu
Summary: Hydrothermally grown Co3O4 nanowires partially substituted by Sn on a multi-layered graphene film exhibit high specific capacitance, superior rate capability, and remarkable cycling stability due to improved conductivity. An asymmetric supercapacitor using these nanowires and Fe2O3@GF electrodes in a quasi-solid state configuration shows outstanding specific capacitance, energy density, and cycling stability, demonstrating great potential for high energy density storage devices.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Multidisciplinary
Abhijit H. Phakatkar, Mahmoud Tamadoni Saray, Md Golam Rasul, Lioudmila Sorokina, Timothy G. Ritter, Tolou Shokuhfar, Reza Shahbazian-Yassar
Summary: The study presents the synthesis of novel quinary high entropy oxide nanoparticles through flame spray pyrolysis, with aberration-corrected STEM used to investigate the crystal structure and energy-dispersive X-ray spectroscopy confirming the high entropy configuration. Analysis results from electron diffraction, X-ray diffraction, and Raman spectroscopy are consistent with STEM results, providing key attributes of high entropy oxide nanoparticles with a spinel crystal structure. X-ray photoelectron spectroscopy results offer insightful understanding of chemical oxidation states and possible cation occupancy sites in the high entropy oxide nanoparticles.
Article
Engineering, Environmental
Fulan Zhong, Zhiyu Li, Yu Luo, Chongqi Chen, Chen Zhou, Li Lin, Guohui Cai, Chaktong Au, Lilong Jiang
Summary: A complex spinel oxide catalyst was prepared to enhance the oxygen reduction reaction in intermediate-temperature solid oxide fuel cells (IT-SOFCs). The introduction of Ni doping optimized the oxidation states of Fe and Co ions, improving small polaron hopping and enhancing electrical conductivity. The electrochemical performance of the NFCO2-based IT-SOFCs outperformed other reported SOFCs with cathodes, achieving a high power density of 1.93 W/cm(2) at 800 degrees C.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Kiyohiro AdachI, Ailong Li, Shuang Kong, Ryuhei Nakamura, Daisuke Hashizume
Summary: Structure parameters, such as bond length, bond angle, and occupancy, play a crucial role in the activity of solid catalysts and the physical properties of electronic and magnetic materials. Accurate structure analysis, especially for cases where atoms with similar atomic numbers occupy the same site, is challenging using powder X-ray diffraction (PXRD) alone. In this study, a hybrid structure analysis combining PXRD and X-ray absorption fine structure (XAFS) was presented, which incorporated more accurate information from XAFS into the precise refinement of PXRD data. This method allowed for the determination of accurate and precise structure parameters, including atom occupancy, providing a useful basis for clarifying catalytic reaction mechanisms.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2023)
Article
Chemistry, Physical
Shiyang He, Jun Yang, Amin Bahrami, Xiang Zhang, Ran He, Martin Hantusch, Sebastian Lehmann, Kornelius Nielsch
Summary: Surface modification with Sb2O5 thin films improves the performance of thermoelectric materials by reducing thermal conductivity and increasing zT values. The deposition of just 5 cycles of Sb2O5 layer results in a significant decrease in ictot and a 12% increase in maximum zT values.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Hector C. Mandujano, Melaku Sisay Tafere, Naveen Kumar Chogondahalli Muniraju, Tielyr D. Creason, Timothy M. McWhorter, Krzysztof Gofryk, Thomas W. Heitmann, Qiang Zhang, Bayram Saparov, Harikrishnan S. Nair
Summary: In this work, the Mn2SiX4 olivines (X=S, Se) were studied using magnetic susceptibility, X-ray and neutron diffraction. The crystal structures of Mn2SiS4 and Mn2SiSe4 were determined using synchrotron X-ray, neutron diffraction, and X-ray total scattering data. It was found that the Mn triangle forming the sawtooth lattice is isosceles in both compounds. The temperature evolution of magnetic susceptibility showed anomalies below 83 K and 70 K for Mn2SiS4 and Mn2SiSe4, respectively, indicating the presence of magnetic ordering. Neutron diffraction measurements revealed that the magnetic space groups of Mn2SiS4 and Mn2SiSe4 are Pnma and Pnm ' a ', respectively.
DALTON TRANSACTIONS
(2023)
Article
Materials Science, Ceramics
Muhammad Yousaf, Shoaib Nazir, Muhammad Akbar, Majid Niaz Akhtar, Asma Noor, Enyi Hu, M. A. K. Yousaf Shah, Yuzheng Lu
Summary: In this study, rare earth-doped Gd oxide in mixed Co-Mn spinel ferrite nanoparticles was synthesized using a sol-gel autocombustion approach. The magnetic and electrical properties decreased with increasing Gd3+ ion content, but the samples exhibited semiconducting behavior.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Anja Zarah Friedberg, Kent Kammer Hansen
JOURNAL OF ELECTROCERAMICS
(2019)
Article
Electrochemistry
K. Kammer Hansen, R. Sazinas
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2019)
Article
Electrochemistry
Rokas Sazinas, Kjeld Bohm Andersen, Kent Kammer Hansen
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2020)
Article
Chemistry, Physical
K. Kammer Hansen
SOLID STATE IONICS
(2020)
Article
Electrochemistry
K. Kammer Hansen
Article
Electrochemistry
R. M. L. Werchmeister, K. Kammer Hansen
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2020)
Article
Electrochemistry
K. Kammer Hansen, L. Deleebeeck, V. Gil
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2020)
Article
Materials Science, Ceramics
Jierong Liang, Rokas Sazinas, Kent Kammer Hansen
Summary: A new series of cobalt-based perovskite cathodes for intermediate temperature solid oxide fuel cells were studied, showing that samples rich in cobalt have thermal expansion coefficients more compatible with common electrolytes, but compromises need to be made between thermal expansion and electrical conductivity.
CERAMICS INTERNATIONAL
(2021)
Article
Electrochemistry
K. Kammer Hansen, L. Deleebeeck
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2020)
Article
Electrochemistry
K. Kammer Hansen
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2020)
Review
Transportation Science & Technology
Kent Kammer Hansen
Summary: This article reviews different techniques for the removal of pollutants from diesel exhaust gasses using an all-solid-state electrochemical reactor, comparing the advantages and drawbacks of different concepts. Early research focused on removing either hydrocarbons or NOx, with high current consumption, while more recent research has shown potential for removing all pollutants with one type of electrochemical reactor, although power consumption remains a challenge.
SAE INTERNATIONAL JOURNAL OF ENGINES
(2021)
Article
Electrochemistry
K. Kammer Hansen
INTERNATIONAL JOURNAL OF ELECTROCHEMISTRY
(2020)
Article
Electrochemistry
Filippo Fenini, Kent Kammer Hansen, Mogens Bjerg Mogensen
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2019)
Article
Chemistry, Multidisciplinary
Apiwat Dankeaw, Fabrizio Gualandris, Rafael Hubert Silva, Roberto Scipioni, Kent Kammer Hansen, Bussarin Ksapabutr, Vincenzo Esposito, Debora Marani
ENVIRONMENTAL SCIENCE-NANO
(2019)
Article
Electrochemistry
Rokas Sazinas, Kjeld Bohm Andersen, Soren Bredmose Simonsen, Peter Holtappels, Kent Kammer Hansen
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2019)
Article
Chemistry, Inorganic & Nuclear
Caleb J. Bennett, Helen E. A. Brand, Alexander K. L. Yuen, Maria K. Nicholas, Brendan J. Kennedy
Summary: The temperature dependence of the crystal structure of Potassium Hexaiodoplatinate(IV) between 80 and 500 K is studied. Different crystal structures are observed at different temperatures, including monoclinic, tetragonal, and cubic structures. Accurate determination of the structures of K2PtI6 is important for further theoretical and practical research.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Zhuo Zeng, Jiangfu Zheng, Xiaoming Li, Changzheng Fan, Rongying Zeng, Wenqing Tang
Summary: An efficient method for phosphate removal from wastewater is urgently needed due to the environmental issue caused by excessive phosphorus. In this study, calcium aluminum layered double hydroxides (CaAl-LDHs) and six amino acid intercalated calcium aluminum layered double hydroxides (CaAl-amino acid-LDHs) were prepared and compared for their phosphate adsorption performance. L-Aspartic acid intercalated calcium aluminum layered double hydroxides (CaAl-Asp-LDHs) exhibited the highest phosphate adsorption capacity and faster removal rate compared to CaAl-LDHs. The phosphate adsorption mechanism on CaAl-Asp-LDHs involved electrostatic attraction, hydrogen bonds, complexation, and ion exchange. This environmentally friendly material shows promising potential for efficient phosphate removal from aquatic environments.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Rouzbeh Aghaei Hakkak, Thomas Schleid
Summary: The novel guanidinium hydro-closo-borates with [BnHn]2- (n = 10 and 12) anions were successfully synthesized via direct reaction. The crystal structures exhibit hydrogen bonding interactions and have the potential to facilitate H2 generation.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Liqiang Ma, Pengpeng Wei, Jingfang Li, Liye Liang, Guangming Li
Summary: A novel catalyst, H4PVMo2W9O40@rht-MOF-1, was developed using a one-pot hydrothermal method. It exhibited high efficiency and reusability in esterification reactions.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Liudmila A. Gorelova, Valentiva A. Yukhno, Maria G. Krzhizhanovskaya, Oleg S. Vereshchagin
Summary: Two new Ga-Ge disordered feldspar-related compounds were successfully synthesized using melt crystallization methods. Their stability and thermal expansion properties were studied under high-temperature conditions. The results showed that both compounds are stable within the studied temperature range and exhibit anisotropic thermal expansion.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Seifeddine Bdey, Nesrine Boussadoune, Francois Allard, Jacques Huot, Gabriel Antonius, Noura Fakhar Bourguiba, Pedro Nunez
Summary: The structure of a novel arsenate compound Na3Al3(AsO4)4 has been determined using X-ray diffraction. The crystal exhibits a monoclinic space group with suitable pathways for Na+ ion migration. The accuracy of the structural model was confirmed using various validation tools and density functional theory calculations.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Amit Kumar Atri, Ujwal Manhas, Sumit Singh, Irfan Qadir, Shikha Sharma, Preteek Sharma, Devinder Singh
Summary: This study synthesizes new oxygen deficient triple layered Ruddlesden-Popper (RP) phases via sol-gel method and investigates the effects of Cr3+ doping on their structural, optical, magnetic, and photocatalytic properties. The experimental results demonstrate that Cr3+ doping alters the interactions and leads to excellent photocatalytic performance in some phases.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Dat Le Thanh, Amandine Guiet, Emmanuelle Suard, Romain Berthelot
Summary: In this study, FeNb11O29 powder samples were prepared using a microwave-assisted solid-state synthesis method for the first time. The samples obtained rapidly from submicrometric oxide precursors showed enhanced cycling performance, possibly due to the easier ionic diffusion occurring in the smaller particles.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Raimund Ziegler, Felix R. S. Purtscher, Thomas S. Hofer, Gunter Heymann, Hubert Huppertz
Summary: We have successfully synthesized a new tellurium borate crystal under high-pressure and high-temperature conditions. The crystal structure and theoretical calculations have been thoroughly discussed.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Subhendu Jana, Eric A. Gabilondo, Paul A. Maggard
Summary: This study reports the synthesis and characterization of two previously unknown multinary selenides, Ba8Hf2Se11(Se-2) and Ba9Hf3Se14(Se-2), which display unique structures and optoelectronic properties competitive with existing perovskite-type chalcogenides.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Fei Ruan, Chonggui Lei, Fenglong Zhang, Jinxiao Bao, Fen Zhou, Min Xie, Pengfei Xu, Jianquan Gao
Summary: Studying the diffusion properties of hydrogen is important for designing new proton conductors. In the past, the chemical diffusion coefficient of hydrogen in proton conductors was usually obtained through a manual calculation method, resulting in difficulty in controlling the calculation accuracy. To address this issue, a mathematical algorithm and C language computer program were developed to calculate the chemical diffusion coefficient based on Fick's second law and Romberg numerical integral. The algorithm showed high precision and powerful computing function, and has the potential to replace the manual calculation method in calculating the chemical diffusion coefficient for hydrogen in proton conductors.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Deepika Shanubhogue, Suraj Mangavati, Ashok Rao, Ru-Ting Tsao, Yung-Kang Kuo
Summary: In this study, the effect of Y doping at the Sn-site on the structural, electrical, and low-temperature thermoelectric properties of the Cu2SnSe3 system is investigated. Y-doped compounds Cu2Sn1-xYxSe3 show reduced electrical resistivity, enhanced power factor, and decreased thermal conductivity, resulting in higher ZT values.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Wei Hong, Min Qing, Xun He, Lei Wang, Yu Pu, Qiyu Li, Zhimin He, Qin Dong, Rong Li, Xinglong Gou
Summary: This study developed a simple method to prepare SnS2 nanosheets and assembled them with MXene to form SnS2/MXene. The composite material exhibited abundant active sites, superior electron/ion transfer kinetics, and a unique 2D interlayer structure, resulting in high specific capacity, outstanding rate capability, and excellent cycling stability, with potential applications in LIBs.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Heng-Yu Ruan, Xue-Qian Wu, Tian-Yu Zhang, Yi Yuan, Le Wang, Ya-Pan Wu, Qing-Wen Han, Ruan Chi, Dong-Sheng Li
Summary: Two isostructural metalorganic frameworks (MOFs), CTGU-36-Co and CTGU-36-Ni, were synthesized, and CTGU-36-Ni demonstrated high activity as a molecular electrocatalyst for the methanol oxidation reaction.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Rachid Fakhreddine, Ali Ouasri, Abderrahim Aatiq
Summary: This paper reports the synthesis, structure, and spectroscopic studies of three novel metal orthophosphate salts. The structures of these compounds were refined using X-ray powder diffraction data. The infrared and Raman analysis revealed their symmetries and the UV-visible investigation determined their optical properties.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
