Reactions of iron(II) and iron(III) chlorides with formic acid

1977 ◽  
Vol 30 (7) ◽  
pp. 1439 ◽  
Author(s):  
RC Paul ◽  
OB Baidya ◽  
AJ Kaur ◽  
RD Sharma ◽  
R Kapoor
Keyword(s):  
Magnetic Susceptibility ◽  
Formic Acid ◽  
Low Temperatures

Formic acid reacts with iron(II) and iron(III) chlorides to give FeCl(OOCH),HCOOH and FeCl2(OOCH),2H2O at low temperatures and Fe(OOCH)2,2HCOOH and FeCl(OOCH)2,H2O at higher temperatures respectively. These compounds have been characterized by elementary analyses, infrared, thermal and magnetic susceptibility measurements.

Magnetic susceptibility of a linear chain antiferromagnet, TANOL, at very low temperatures

1976 ◽  
Vol 41 (2) ◽  
pp. 354-356 ◽  
Author(s):  
Masafumi Kumano ◽  
Yusaku Ikegami ◽  
Takashi Sato ◽  
Shinhachiro Saito
Keyword(s):  
Magnetic Susceptibility ◽  
Low Temperatures ◽  
Linear Chain

MAGNETIC BEHAVIOUR OF UPdAl, UCuGa AND UCuSn

1993 ◽  
Vol 07 (01n03) ◽  
pp. 850-854 ◽  
Author(s):  
V.H. TRAN ◽  
R. TROĆ
Keyword(s):  
Electrical Resistivity ◽  
Magnetic Susceptibility ◽  
Low Temperatures ◽  
Magnetic Behaviour ◽  
Type Structure ◽  
Complex Structures ◽  
Temperature Dependent ◽  
Antiferromagnetic Ordering

Magnetic susceptibility and electrical resistivity have been measured on UCuGa, UCu1+xSn1−x, (x=0 and 0.1), and UPdAl. The first two compounds, crystallizing in the hexagonal CaIn2-type structure, show at low temperatures an antiferromagnetic ordering probably with complex structures. UPdAl, which adopts the orthorhombic TiNiSi-type structure, was found to be a weakly temperature-dependent paramagnet down to 4.2 K.

Enhancing the Feasibility of Pd/C-catalyzed Formic Acid Decomposition for Hydrogen Generation – Catalyst Pretreatment, Deactivation, and Regeneration

2021 ◽  
Author(s):  
Axel Kosider ◽  
Dominik Blaumeiser ◽  
Simon Schoetz ◽  
Patrick Preuster ◽  
Andreas Bösmann ◽  
...  
Keyword(s):  
Formic Acid ◽  
Low Temperatures ◽  
Hydrogen Generation ◽  
Side Reactions ◽  
Acid Decomposition ◽  
Catalyst Pretreatment ◽  
Formic Acid Decomposition ◽  
Catalyst Systems

Formic acid decomposition (FAD) generates H2 at low temperatures. However, many known catalyst systems suffer from deactivation due to competing side reactions during FAD. In this work, we focus on...

Magnetic susceptibility ofNdGaO3at low temperatures: A quasi-two-dimensional Ising behavior

1998 ◽  
Vol 58 (2) ◽  
pp. 798-804 ◽  
Author(s):  
F. Luis ◽  
M. D. Kuz’min ◽  
F. Bartolomé ◽  
V. M. Orera ◽  
J. Bartolomé ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Low Temperatures ◽  
Two Dimensional

scholarly journals Potassium-Doped Para-Terphenyl: Structure, Electrical Transport Properties and Possible Signatures of a Superconducting Transition

2020 ◽  
Vol 5 (4) ◽  
pp. 78
Author(s):  
Nicola Pinto ◽  
Corrado Di Nicola ◽  
Angela Trapananti ◽  
Marco Minicucci ◽  
Andrea Di Cicco ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Electrical Transport ◽  
Low Temperatures ◽  
Chemical Method ◽  
Preliminary Evidence ◽  
Superconducting Gap ◽  
Superconducting Transition ◽  
Electrical Transport Properties ◽  
High Tc ◽  
Resistivity Measurements

Preliminary evidence for the occurrence of high-TC superconductivity in alkali-doped organic materials, such as potassium-doped p-terphenyl (KPT), were recently obtained by magnetic susceptibility measurements and by the opening of a large superconducting gap as measured by ARPES and STM techniques. In this work, KPT samples have been synthesized by a chemical method and characterized by low-temperature Raman scattering and resistivity measurements. Here, we report the occurrence of a resistivity drop of more than 4 orders of magnitude at low temperatures in KPT samples in the form of compressed powder. This fact was interpreted as a possible sign of a broad superconducting transition taking place below 90 K in granular KPT. The granular nature of the KPT system appears to be also related to the 20 K broadening of the resistivity drop around the critical temperature.

Low-temperature Properties of U2Co2InH1.9

2007 ◽  
Vol 62 (7) ◽  
pp. 977-981 ◽  
Author(s):  
Ladislav Havela ◽  
Khrystyna Miliyanchuk ◽  
Laura C. J. Pereira ◽  
Eva Šantavá
Keyword(s):  
High Pressure ◽  
Magnetic Susceptibility ◽  
Specific Heat ◽  
Low Temperatures ◽  
Magnetic Order ◽  
Parent Compound ◽  
Spin Fluctuations ◽  
High Magnetic Fields ◽  
Electronic Specific Heat ◽  
Metamagnetic Transition

Abstract U2Co2InH1.9, synthesized by high-pressure hydrogenation of U2Co2In, crystallizes in the tetragonal structure similar to the parent compound, expanded by 8.4 %. Although U2Co2In is a weak paramagnet, its hydride shows properties suggesting a proximity to the magnetic order. Its magnetic susceptibility exhibits a maximum at T = 2.4 K, ascribed to spin fluctuations. Magnetization at low temperatures goes through a metamagnetic transition between 2 - 3 T. The specific heat characteristics, with a pronounced upturn of Cp/T vs. T at low temperatures which can be fitted using an additional −T 1/2 term, resemble the behaviour of U2Co2Sn. The γ coefficient of the electronic specific heat, reaching 244 mJ mol−1 K−2, is gradually suppressed by high magnetic fields.

The Dependence of Magnetic Moments on Magnetic Impurities of Ni in Eu1.86Ce0.14Cu1-yNiyO4+a-d

2020 ◽  
Vol 860 ◽  
pp. 148-153
Author(s):  
Muhammad Abdan Syakuur ◽  
Yati Maryati ◽  
Utami Widyaiswari ◽  
Dita Puspita Sari ◽  
Togar Saragi ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Low Temperatures ◽  
Unit Volume ◽  
Magnetic Impurity ◽  
Magnetic Moments ◽  
Magnetic Impurities ◽  
Superconducting Cuprates ◽  
Susceptibility Data ◽  
Diamagnetic Behavior ◽  
Volume Unit

The partially substitution of magnetic impurity Ni for Cu in electron-doped superconducting cuprates of Eu2-xCexCu1-yNiyO4+a-d with x = 0.14 and y = 0, 0.01 and 0.02 has been studied in order to investigate the effect of Ni impurity on structure and the value of magnetic moments per unit volume extracted from susceptibility data in under-doped region. Magnetic-susceptibility measurements were carried out at low temperatures down to 2 K. For sample with y = 0, diamagnetic behavior is observed starting from about 9 K. The superconductivity disappeared at y ³ 0.01. The values of magnetic moment in every volume unit decreased with increasing Ni.

Reductive de-polymerization of kraft lignin with formic acid at low temperatures using inexpensive supported Ni-based catalysts

Fuel ◽  
2017 ◽  
Vol 209 ◽  
pp. 579-586 ◽  
Author(s):  
Shanhua Huang ◽  
Nubla Mahmood ◽  
Yongsheng Zhang ◽  
Matthew Tymchyshyn ◽  
Zhongshun Yuan ◽  
...  
Keyword(s):  
Formic Acid ◽  
Low Temperatures ◽  
Kraft Lignin ◽  
Supported Ni
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