Article
Chemistry, Physical
Irene Ferrari, Alessandro Motta, Robertino Zanoni, Francesca Anna Scaramuzzo, Francesco Amato, Enrique A. Dalchiele, Andrea Giacomo Marrani
Summary: This study investigates the nature and interactions of oxygen functional groups in graphene oxide, providing insights into their electrochemical reduction energetics. Chemical modifications of graphene oxide under controlled electrochemical reduction conditions were studied to understand the contribution of single reactive oxygen functional groups. X-ray photoelectron spectroscopic analysis and theoretical modeling were used to characterize the various carbonaceous species involved in the rich chemistry of graphene oxide.
Article
Chemistry, Multidisciplinary
Florian Massuyeau, Thibault Broux, Florent Coulet, Aude Demessence, Adel Mesbah, Romain Gautier
Summary: This article introduces a machine learning-based method that utilizes X-ray diffraction patterns to automatically determine whether unknown materials are perovskite-type materials, providing a new efficient approach for determining crystal structures.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Shunsuke Kitou, Masaki Gen, Yuiga Nakamura, Kunihisa Sugimoto, Yusuke Tokunaga, Shintaro Ishiwata, Taka-hisa Arima
Summary: This article reports a successful observation of the spatial distribution of valence electrons in cubic perovskite SrFeO3 by high-energy X-ray diffraction experiments. It reveals that the anomalous valence state in Fe is attributed to the considerable contribution of the ligand hole.
Article
Materials Science, Multidisciplinary
Andre Ebel, Olivier Marsan, Jacques Lacaze, Benoit Malard
Summary: During rapid thermal cycling in automotive exhaust manifolds, a high-silicon cast iron was tested at 800 degrees C, leading to the formation of a columnar zone at the substrate/oxide interface. Detailed analysis proposed a mechanism for the formation of this unique structure.
Article
Materials Science, Ceramics
Songhak Yoon, Wenjie Xie, Xingxing Xiao, Stefano Checchia, Mauro Coduri, Peter Schuetzenduebe, Marc Widenmeyer, Stefan G. Ebbinghaus, Benjamin Balke, Anke Weidenkaff, Gisela Schuetz, Kwanghyo Son
Summary: Magnetic properties of perovskite titanates ATiO(3-& delta;) (A = Ca, Sr, Ba) were investigated before and after arc melting. Crystal structure analysis and quantitative chemical element analysis were performed. The magnetic properties were found to be influenced by impurities of 3d elements and the occupation of magnetic ions varied depending on the composition and crystal structure. Furthermore, the formation of oxygen vacancies and reduction of Ti4+ to Ti3+ were also observed during arc melting.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Seemita Banerjee, Ananya Chowdhury, Amreesh Chandra, V. Grover
Summary: This study investigates the Ni1-xCoxO system and its potential for energy storage application. The system exhibits interesting phase transitions and Ni0.5Co0.5O shows enhanced electrochemical performance due to its richer redox chemistry.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Weiwei Fan, Zhu Sun, Yu Bai
Summary: Perovskite oxide can generate a nanoparticle decorated material with improved electrochemical performance through electrochemical treatment.
Article
Chemistry, Physical
Timo Fuchs, Valentin Briega-Martos, Jan O. Fehrs, Canrong Qiu, Marta Mirolo, Chentian Yuan, Serhiy Cherevko, Jakub Drnec, Olaf M. Magnussen, David A. Harrington
Summary: The initial step of electrochemical surface oxidation involves extracting a metal atom from its lattice site to a location in a growing oxide. Through simultaneous electrochemical and in situ high-energy surface X-ray diffraction measurements, it has been observed that the extraction of Pt atoms from Pt(111) is a fast, potential-driven process, while the formation of adsorbed oxygen-containing species occurs at a slower rate and is not directly coupled with the extraction process. It can be concluded that potential independently plays a key role in electrochemical surface oxidation.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Timo Fuchs, Valentin Briega-Martos, Jan O. Fehrs, Canrong Qiu, Marta Mirolo, Chentian Yuan, Serhiy Cherevko, Jakub Drnec, Olaf M. Magnussen, David A. Harrington
Summary: The initial step of electrochemical surface oxidation involves the extraction of metal atoms from their lattice sites to form a growing oxide. By conducting fast simultaneous electrochemical and in situ high-energy surface X-ray diffraction measurements, it has been demonstrated that the extraction of Pt atoms from Pt(111) is a fast process driven by potential, while the charge transfer for the formation of oxygen-containing species occurs at a much slower rate and appears to be decoupled from the extraction process. It is thus concluded that potential plays an independent and crucial role in electrochemical surface oxidation.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Jyothis Arumughan, Magesh Kannan Vijayakrishnan, Karthikeyan Palaniswamy, Tanvir Alam, Thanarajan Kumaresan, Senthil Kumar Palaniswamy Angappamudaliar, Senthilarasu Sundaram
Summary: By dispersing multi-walled carbon nanotubes and graphene nanoplatelets in alkaline vanadium electrolyte, the electrochemical performance of vanadium redox flow batteries can be enhanced.
Article
Chemistry, Multidisciplinary
Lei Cheng, Zhou Liu, Shunde Li, Yufeng Zhai, Xiao Wang, Zhi Qiao, Qiaofei Xu, Ke Meng, Zhiyuan Zhu, Gang Chen
Summary: A new type of MA-free FA-based low-dimensional perovskites shows superior photovoltaic performance and thermal stability compared to MA-containing 2D perovskites.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Shuang Yang, Zhaochun Liu, Hongyu An, Sven Arnouts, Jim de Ruiter, Floriane Rollier, Sara Bals, Thomas Altantzis, Marta C. Figueiredo, Ivo A. W. Filot, Emiel J. M. Hensen, Bert M. Weckhuysen, Ward van der Stam
Summary: Bimetallic electrocatalysts with tin (Sn) doping in copper oxide (CuO) have demonstrated improved catalytic performance for CO2 reduction reaction. Sn doping enhances the Faradaic efficiency for CO formation and prolongs the catalyst stability. The in situ characterization techniques reveal that Sn doping lowers the binding energy of the adsorbed *CO intermediate, favoring CO desorption.
Article
Materials Science, Ceramics
G. Kilic, E. Ilik, Shams A. M. Issa, Bashar Issa, U. G. Issever, Hesham M. H. Zakaly, H. O. Tekin
Summary: This study evaluated the structural, optical, and physical characteristics of glasses with different levels of In2O3 content, finding that increasing In2O3 content led to higher glass density, increased Urbach energies, and alterations in optical and absorption characteristics. Additionally, substituting ZnO with In2O3 significantly enlarged the optical band gap, and the gamma-ray mass attenuation coefficient showed consistent growth with higher In2O3 content. High concentrations of In2O3 in TeO2-ZnO glass were found to be beneficial for integrating structural, optical, and radiation properties.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Ashish Shukla, Arun Kumar, Kedar Pathak
Summary: A solid solution polycrystalline powder sample of LaMnO3 - LaFeO3 - LaCoO3 was synthesized via mixed-oxide method in a 1:1:1 ratio by mass. It exhibits a blend of orthorhombic and cubic crystal structure and shows ferromagnetic nature from 50 K to 300 K.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Preeti Pokhriyal, Anil Kumar, M. N. Singh, Pankaj Sagdeo, A. K. Sinha, Archna Sagdeo
Summary: Delafossites (ABO2) are of great interest due to their interesting structural and magnetic transitions. The distortions in octahedra of delafossites can influence the structural and physical properties of materials. This study found that the distortion of CrO6 octahedra in CuCrO2 decreases with increasing temperature.
SOLID STATE SCIENCES
(2021)