Evaluation of the Electronic and Local Structure of Mn in Proton-Conducting Oxide, Ca(Zr,Mn)O3−δ, To Elucidate a Direct Hydrogen Dissolution Reaction

2019 ◽  
Vol 123 (26) ◽  
pp. 16034-16045
Author(s):  
Masatsugu Oishi ◽  
Takashi Nakamura ◽  
Iwao Watanabe ◽  
Takashi Yamamoto ◽  
Takuya Doi ◽  
...  
Keyword(s):  
Local Structure ◽  
Proton Conducting ◽  
Dissolution Reaction ◽  
Hydrogen Dissolution

scholarly journals Local structure and vibrational dynamics of proton conducting Ba2In2O5(H2O)x

2019 ◽  
Vol 7 (29) ◽  
pp. 17626-17636 ◽  
Author(s):  
A. Perrichon ◽  
M. Jiménez-Ruiz ◽  
L. Mazzei ◽  
S. M. H. Rahman ◽  
M. Karlsson
Keyword(s):  
Local Structure ◽  
Conduction Mechanism ◽  
Proton Conduction ◽  
Proton Conductors ◽  
Vibrational Dynamics ◽  
Proton Conducting

Studies of partially and fully hydrated Ba2In2O5(H2O)xproton conductors point toward segregation into pseudo-cubic and brownmillerite-type phases and a highly anisotropic proton conduction mechanism.

Local structure and hydrogen bond characteristics of imidazole molecules for proton conduction in acid and base proton-conducting composite materials

2018 ◽  
Vol 20 (15) ◽  
pp. 10311-10318 ◽  
Author(s):  
Yuta Hori ◽  
Takuma Chikai ◽  
Tomonori Ida ◽  
Motohiro Mizuno
Keyword(s):  
Hydrogen Bond ◽  
Composite Materials ◽  
Hydrogen Bonds ◽  
Rotational Motion ◽  
Local Structure ◽  
Proton Conduction ◽  
Conducting Composite ◽  
Proton Conducting ◽  
Acid And Base ◽  
Bond Characteristics

Protons in composite materials of acidic polymers and imidazole molecules transport with rotational motion of imidazole in hydrogen bonds.

Local Structure and Dynamics of Imidazole Molecules in Proton-Conducting Poly(vinylphosphonic acid)–Imidazole Composite Material

2014 ◽  
Vol 47 (21) ◽  
pp. 7469-7476 ◽  
Author(s):  
Motohiro Mizuno ◽  
Ayano Iwasaki ◽  
Tsuyoshi Umiyama ◽  
Ryutaro Ohashi ◽  
Tomonori Ida
Keyword(s):  
Composite Material ◽  
Local Structure ◽  
Proton Conducting ◽  
Structure And Dynamics ◽  
Vinylphosphonic Acid

X-ray microprobe for materials science

1994 ◽  
Vol 52 ◽  
pp. 56-57
Author(s):  
G.E. Ice
Keyword(s):  
Crystallographic Orientation ◽  
Local Structure ◽  
Materials Science ◽  
Chemical Information ◽  
X Ray Diffraction ◽  
Ray Optics ◽  
X Ray ◽  
Novel Materials ◽  
New Information ◽  
Elemental Sensitivity

The increasing availability of synchrotron x-ray sources has stimulated the development of advanced hard x-ray (E≥5 keV) microprobes. With new x-ray optics these microprobes can achieve micron and submicron spatial resolutions. The inherent elemental and crystallographic sensitivity of an x-ray microprobe and its inherently nondestructive and penetrating nature will have important applications to materials science. For example, x-ray fluorescent microanalysis of materials can reveal elemental distributions with greater sensitivity than alternative nondestructive probes. In materials, segregation and nonuniform distributions are the rule rather than the exception. Common interfaces to whichsegregation occurs are surfaces, grain and precipitate boundaries, dislocations, and surfaces formed by defects such as vacancy and interstitial configurations. In addition to chemical information, an x-ray diffraction microprobe can reveal the local structure of a material by detecting its phase, crystallographic orientation and strain.Demonstration experiments have already exploited the penetrating nature of an x-ray microprobe and its inherent elemental sensitivity to provide new information about elemental distributions in novel materials.

DETERMINATION OF THE LOCAL STRUCTURE OF METALLIC GLASSES BY EXAFS

1982 ◽  
Vol 43 (C9) ◽  
pp. C9-43-C9-46 ◽  
Author(s):  
A. Sadoc ◽  
A. M. Flank ◽  
D. Raoux ◽  
P. Lagarde
Keyword(s):  
Metallic Glasses ◽  
Local Structure

LOCAL STRUCTURE IN InGaAsP QUATERNARY ALLOYS

1986 ◽  
Vol 47 (C8) ◽  
pp. C8-423-C8-426
Author(s):  
H. OYANAGI ◽  
Y. TAKEDA ◽  
T. MATSUSHITA ◽  
T. ISHIGURO ◽  
A. SASAKI
Keyword(s):  
Local Structure ◽  
Quaternary Alloys

LOCAL STRUCTURE AND THERMODYNAMICS OF II-VI AND III-V SEMICONDUCTORS BY EXAFS

1986 ◽  
Vol 47 (C8) ◽  
pp. C8-403-C8-406
Author(s):  
N. MOTTA ◽  
A. BALZAROTTI ◽  
P. LETARDI
Keyword(s):  
Local Structure

Interaction of H2O, O2 and H2 with Proton Conducting Oxides Based on Lanthanum Scandates

2019 ◽  
pp. 88-100
Author(s):  
A. S. Farlenkov ◽  
N. A. Zhuravlev ◽  
Т. A. Denisova ◽  
М. V. Ananyev
Keyword(s):  
Water Vapor ◽  
Partial Pressure ◽  
Gas Phase ◽  
Molecular Hydrogen ◽  
Proton Magnetic Resonance ◽  
Partial Pressure Of Oxygen ◽  
Proton Conducting ◽  
Conducting Oxides ◽  
Temperature Range ◽  
Apparent Level

The research uses the method of high-temperature thermogravimetric analysis to study the processes of interaction of the gas phase in the temperature range 300–950 °C in the partial pressure ranges of oxygen 8.1–50.7 kPa, water 6.1–24.3 kPa and hydrogen 4.1 kPa with La1–xSrxScO3–α oxides (x = 0; 0.04; 0.09). In the case of an increase in the partial pressure of water vapor at a constant partial pressure of oxygen (or hydrogen) in the gas phase, the apparent level of saturation of protons is shown to increase. An increase in the apparent level of saturation of protons of the sample also occurs with an increase in the partial pressure of oxygen at a constant partial pressure of water vapor in the gas phase. The paper discusses the causes of the observed processes. The research uses the hydrogen isotope exchange method with the equilibration of the isotope composition of the gas phase to study the incorporation of hydrogen into the structure of proton-conducting oxides based on strontium-doped lanthanum scandates. The concentrations of protons and deuterons were determined in the temperature range of 300–800 °C and a hydrogen pressure of 0.2 kPa for La0.91Sr0.09ScO3–α oxide. The paper discusses the role of oxygen vacancies in the process of incorporation of protons and deuterons from the atmosphere of molecular hydrogen into the structure of the proton conducting oxides La1–xSrxScO3–α (x = 0; 0.04; 0.09). The proton magnetic resonance method was used to study the local structure in the temperature range 23–110 °C at a rotation speed of 10 kHz (MAS) for La0.96Sr0.04ScO3–α oxide after thermogravimetric measurements in an atmosphere containing water vapor, and after exposures in molecular hydrogen atmosphere. The existence of proton defects incorporated into the volume of the investigated proton oxide from both the atmosphere containing water and the atmosphere containing molecular hydrogen is unambiguously shown. The paper considers the effect of the contributions of the volume and surface of La0.96Sr0.04ScO3–α oxide on the shape of the proton magnetic resonance spectra.

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