scholarly journals High-pressure synthesis of ε-FeOOH from β-FeOOH and its application to the water oxidation catalyst

RSC Advances ◽  
2020 ◽  
Vol 10 (73) ◽  
pp. 44756-44767
Author(s):  
Kazuhiko Mukai ◽  
Tomiko M. Suzuki ◽  
Takeshi Uyama ◽  
Takamasa Nonaka ◽  
Takeshi Morikawa ◽  
...  
Keyword(s):  
High Pressure ◽  
Water Oxidation ◽  
High Pressures ◽  
Functional Materials ◽  
Oxidation Catalyst ◽  
Extreme Conditions ◽  
High Pressure Synthesis ◽  
The Earth ◽  
Pressure Synthesis ◽  
Space Sciences

Research on materials under extreme conditions such as high pressures provides new insights into the evolution and dynamics of the earth and space sciences, but recently, this research has focused on applications as functional materials.

scholarly journals Hochdrucksynthese quaternärer Chalkogenidhalogenide AB2X3Y (A = Cu, Ag; B = In; X = S, Se, Te; Y = Cl, Br, I)/High Pressure Synthesis of Quaternary Chalcogenide Halogenides AB2X3Y (A = Cu, Ag; B = In; X = S, Se, Te; Y = Cl, Br, I)

1983 ◽  
Vol 38 (2) ◽  
pp. 155-160 ◽  
Author(s):  
Klaus-Jürgen Range ◽  
Heinz-Joachim Hübner
Keyword(s):  
High Pressure ◽  
Crystal Structures ◽  
Spinel Structure ◽  
High Pressures ◽  
Reaction Pathways ◽  
High Pressure Synthesis ◽  
Quaternary Compounds ◽  
Pressure Synthesis ◽  
High Pressures And Temperatures

Abstract Quaternary compounds AB2X3Y (A = Cu, Ag; B = In; X = S, Se, Te; Y = Cl, Br, I) could be synthesized at high pressures and temperatures. The crystal structures found are defect-zincblende (AgIn2Se3I, AgIn2Te3l, CuIn2Se3Br, CuIn2Se3I, CuIn2Te3Cl, CuIn2Te3Br, CuInTe3I), spinel (AgIn2S3Cl, AgIn2S3Br, AgIn2Se3Cl, AgIn2Se3Br, AgIn2Se3l) and defect-rocksalt (AgIn2Te3Cl, AgIn2Te3Br). A second form of CuIn2Se3l is intermediate between the zincblende and spinel structure. A survey of the different reaction pathways of AB-B2X3 mixtures at high pressures and temperatures is given.

High Pressure Synthesis of RuSr2MeCu2O8 (Me = Ho or Y)

2000 ◽  
Vol 659 ◽  
Author(s):  
R. Ruiz-Bustos ◽  
J. M. Gallardo-Amores ◽  
E. Morán ◽  
J. P. Attfield ◽  
R. Sáez-Puche ◽  
...  
Keyword(s):  
High Pressure ◽  
Magnetic Properties ◽  
High Temperatures ◽  
High Pressures ◽  
Cell Parameters ◽  
Preliminary Results ◽  
High Pressure Synthesis ◽  
Lanthanide Contraction ◽  
Pressure Synthesis ◽  
Ferromagnetic Ordering

ABSTRACTThe synthesis at high pressures ( ∼60 Kbar) and high temperatures (∼1100 °C) of the title new ruthenates has been achieved and the materials compared to the gadolinium analogue. The structure remains tetragonal (S.G. P4/mmm) and the cell parameters linearly decrease following the lanthanide contraction. Preliminary results concerning the complex magnetic properties of these materials, where superconductivity, antiferromagnetism and a superimposed ferromagnetic ordering coexist, are presented.

Hochdrucksynthese und Kristallstruktur von Kalium- und Rubidiumdiwolframat(VI), K2W2O7 und Rb2W2O7 / High-Pressure Synthesis and Crystal Structure of Potassium and Rubidium Ditungstate(VI), K2W2O7 und Rb2W2O7

1990 ◽  
Vol 45 (2) ◽  
pp. 107-110 ◽  
Author(s):  
Klaus-Jürgen Range ◽  
Wilhelm Hegenbart ◽  
Anton M. Heyns ◽  
Franz Rau ◽  
Ulrich Klement
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Single Crystals ◽  
High Pressures ◽  
Monoclinic Space Group ◽  
Potassium Ions ◽  
Synthesis And Crystal Structure ◽  
Space Group ◽  
High Pressure Synthesis ◽  
Pressure Synthesis

Potassium tungstate, K2WO4, decomposes at high pressures to give K2W2O7 and other products. Single crystals of K2W2O7 could be synthesized from a mixture of K2WO4 + WO3 at 40kbar, 1000 °C. The crystals are monoclinic, space group P21/c, with a = 3.883(1) A, b = 13.653(4) Å, c = 5.960(1) Å, β = 90.40(3)°, and Ζ = 2.The structure is comprise of distorted WO6-octahedra (W–O = 1.75-2.13 A) which are connected by corner- and edgesharing, thus forming layers with a sequence ABAB ... along [010]. The potassium ions are situated between the layers with K–O distances of 2.66-3.04 A.Rb2W2O7, synthesized from a Rb2WO4/WO3-mixture at 40 kbar, 1000 °C, is isostructural with K2W2O7 (a = 3.9645(4) Å, b = 14.119(1) Å, c = 6.0415(5) Å,β = 90.446(9)°.

scholarly journals High-pressure synthesis of Ba2RhO4 , a rhodate analog of the layered perovskite Sr-ruthenate

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
I. Kurata ◽  
José A. Flores-Livas ◽  
H. Sugimoto ◽  
H. Takahashi ◽  
H. Sagayama ◽  
...  
Keyword(s):  
High Pressure ◽  
Layered Perovskite ◽  
High Pressure Synthesis ◽  
Pressure Synthesis
Sign in / Sign up

Export Citation Format

Share Document