Studies on the acid-base properties of the AIBr sub 3 -NaBr melts

Hayashi, H; Hayashi, N; Takehara, Z; Katagiri, A

doi:10.1149/1.2097508

Title: Studies on the acid-base properties of the AIBr sub 3 -NaBr melts

Full Record
Other Related Research

Abstract

Recently, a lot of work has been performed on the acid-base properties of Lewis acidic molten salts. One of the most extensively investigated melt systems is the sodium chloroaluminate melt (175{degrees}-220{degrees}C) in which the chloride ion activity is dependent upon the composition of the melt. It is well known that unusual higher oxidation state ionic species, such as S(IV) or lower oxidation state cluster compounds, such as W{sub 6}CI{sub 8}{sup 4 +}, can be stable in the chloroaluminate melts because of the strong Lewis acidity of these solvents. These melts are now one of the potential solvents. These melts are now one of the potential materials for use in low-temperature molten salt batteries or as solvents for organic syntheses. The aluminum bromide-sodium bromide melts also show the variable Lewis acidity. Some physical properties of the haloaluminate melts are dependent on the halide species. Therefore, the acid-base properties of the melts also may vary with the anion component, even with the same cationic constituent. The authors discuss how they investigated the acid-base properties of the AIBr{sub 3}-NaBr melts and compared their characteristics with those of the chloroaluminate melts.

Authors:

Hayashi, H ^[1]; Hayashi, N; Takehara, Z ^[2]; Katagiri, A ^[3]

Dept. of Applied Chemistry, Faculty of Engineering, Okayama Univ., Okayama 700 (JP)
Dept. of Industrial Chemistry, Faculty of Engineering, Kyoto Univ., Kyoto 606 (JP)
Dept. of Chemistry, College of Liberal Arts and Sciences, Kyoto Univ., Kyoto Univ., Kyoto 606 (JP)

Publication Date:: Fri Sep 01 00:00:00 EDT 1989

OSTI Identifier:: 7046690

Resource Type:: Journal Article

Journal Name:: Journal of the Electrochemical Society; (USA)

Additional Journal Information:: Journal Volume: 136:9; Journal Issue: 9; Journal ID: ISSN 0013-4651

Country of Publication:: United States

Language:: English

Subject:: 30 DIRECT ENERGY CONVERSION; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ALUMINIUM BROMIDES; CHEMICAL PROPERTIES; FUEL CELLS; CHEMICAL COMPOSITION; SODIUM BROMIDES; CHEMICAL REACTION KINETICS; ELECTROCHEMICAL CORROSION; LEWIS ACIDS; LEWIS BASES; LOW TEMPERATURE; MOLTEN SALTS; OXIDATION; ALKALI METAL COMPOUNDS; ALUMINIUM COMPOUNDS; BASES; BROMIDES; BROMINE COMPOUNDS; CHEMICAL REACTIONS; CORROSION; DIRECT ENERGY CONVERTERS; ELECTROCHEMICAL CELLS; HALIDES; HALOGEN COMPOUNDS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; KINETICS; REACTION KINETICS; SALTS; SODIUM COMPOUNDS; 300403* - Thermionic Converters- Materials, Components, & Auxiliaries; 400201 - Chemical & Physicochemical Properties; 400400 - Electrochemistry

Citation Formats


                    Hayashi, H, Hayashi, N, Takehara, Z, and Katagiri, A. Studies on the acid-base properties of the AIBr sub 3 -NaBr melts.  United States: N. p., 1989. 
        Web.  doi:10.1149/1.2097508.

Copy to clipboard


                    Hayashi, H, Hayashi, N, Takehara, Z, & Katagiri, A. Studies on the acid-base properties of the AIBr sub 3 -NaBr melts.  United States.  https://doi.org/10.1149/1.2097508

Copy to clipboard


                    Hayashi, H, Hayashi, N, Takehara, Z, and Katagiri, A. 1989.  
        "Studies on the acid-base properties of the AIBr sub 3 -NaBr melts".  United States.  https://doi.org/10.1149/1.2097508.

Copy to clipboard


                    
@article{osti_7046690,

  title        = {Studies on the acid-base properties of the AIBr sub 3 -NaBr melts},

  author       = {Hayashi, H and Hayashi, N and Takehara, Z and Katagiri, A},

  abstractNote = {Recently, a lot of work has been performed on the acid-base properties of Lewis acidic molten salts. One of the most extensively investigated melt systems is the sodium chloroaluminate melt (175{degrees}-220{degrees}C) in which the chloride ion activity is dependent upon the composition of the melt. It is well known that unusual higher oxidation state ionic species, such as S(IV) or lower oxidation state cluster compounds, such as W{sub 6}CI{sub 8}{sup 4 +}, can be stable in the chloroaluminate melts because of the strong Lewis acidity of these solvents. These melts are now one of the potential solvents. These melts are now one of the potential materials for use in low-temperature molten salt batteries or as solvents for organic syntheses. The aluminum bromide-sodium bromide melts also show the variable Lewis acidity. Some physical properties of the haloaluminate melts are dependent on the halide species. Therefore, the acid-base properties of the melts also may vary with the anion component, even with the same cationic constituent. The authors discuss how they investigated the acid-base properties of the AIBr{sub 3}-NaBr melts and compared their characteristics with those of the chloroaluminate melts.},

  doi          = {10.1149/1.2097508},

  url          = {https://www.osti.gov/biblio/7046690},
  journal      = {Journal of the Electrochemical Society; (USA)},

  issn         = {0013-4651},

  number       = 9,

  volume       = 136:9,

  place        = {United States},

  year         = {Fri Sep 01 00:00:00 EDT 1989},

  month        = {Fri Sep 01 00:00:00 EDT 1989}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1149/1.2097508

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Studies of the electrochemistry of niobium(V) in sodium chloroaluminate and fluorochloroaluminate melts

Miscellaneous Sienerth, K

Methods for the removal of oxide from LiF:NaF:KF (46.5:11.5:42.0 mole %) and sodium chloroaluminate molten salts were investigated. Raman spectroscopy of LiF:NaF:KF melts containing K[sub 2]TaF[sub 7] was utilized to determine the oxide level of the melts after several different purification techniques had been employed. In the case of sodium chloroaluminate, it was found that both phosgene (COCl[sub 2]) and carbon tetrachloride (CCl[sub 4]) were efficient oxide removal agents. The electrochemistry of Nb(V) in sodium chloroaluminate at 178[degrees]C was examined using various voltammetric techniques. It was found that reports of various workers in this system were erroneous due to themore »« less
Structure of acidic haloaluminate melts: Neutron diffraction and quantum chemical calculations

Journal Article Blander, M; Bierwagen, E; Calkins, K; ... - Journal of Chemical Physics; (United States)

The structure of molten mixtures of (KX){sub {ital y}}(AlX{sub 3}){sub 1{minus}{ital y}} was investigated by neutron diffraction for X=Cl and Br and {ital y}=0.25 and 0.33. These melts, known as acidic haloaluminates, contain different ionic species such as AlX{sup {minus}}{sub 4},Al{sub 2}X{sup {minus}}{sub 7}, Al{sub 3}X{sup {minus}}{sub 10}. The diffraction patterns were similar, although not identical, for the same halide pairs and showed features indicative of short-range and intermediate-range order. Quantum chemical calculations were carried out on AlX{sup {minus}}{sub 4}, Al{sub 2}X{sup {minus}}{sub 7}, and Al{sub 3}X{sup {minus}}{sub 10} to provide information needed to interpret the structural results within themore »« less
https://doi.org/10.1063/1.463063
Chemical thermodynamics of metallic alloy formation. Final report. [Na-K; Mg-Cd; NaCl-NaBr]

Technical Report Wallace, W

Methods and apparatus required in determining the heats of formation at 25/sup 0/C of sodium-potassium alloys, magnesium-cadmium alloys and sodium chloride-sodium bromide ionic solid solutions have been developed. Method for determining free energies of formation of magnesium-cadmium alloys at elevated temperatures has been developed. Apparatus for determining the specific heats of magnesium-cadmium alloys at low temperatures has been prepared. The heat of reaction of pure potassium with water was determined. Provisional values for the heats of formation of four sodium-potassium alloys were obtained. A density-composition curve for magnesium-cadmium alloys was constructed. Heats of formation of nine NaCl-NaBr solid solutions weremore »« less
Spectroscopic and electrochemical studies of tungsten(VI) and Tungsten(V) chloride and oxychloride complexes in a sodium chloride saturated sodium chloroaluminate melt

Journal Article Sun, I; Edwards, A; Mamantov, G - Journal of the Electrochemical Society; (United States)

Raman and UV-visible absorption spectroscopies indicate that the addition of WCl[sub 6] or KWCl[sub 6] to a sodium chloride saturated sodium chloroaluminate melt at 175 C produces the tungsten (V) hexachloride anion [WCl[sub 6]][sup [minus]] can be oxidized to WCl[sub 6] via a reversible one-electron charge-transfer process with a voltammetric half-wave potential of 2.077 V referenced to aluminum in a pure sodium chloride saturated sodium chloroaluminate melt. With fast scan rate voltammetry, [WCl[sub 6]][sup [minus]] can be reduced to [WCl[sub 6]][sup 2[minus]] and [WCl[sub 6]][sup 3[minus]] via two consecutive one-electron reduction processes with half-wave potentials of 1.578 and 0.818 V,more »« less
https://doi.org/10.1149/1.2220901
Molten salt techniques. Vol. 1

Book Lovering, D; Gale, R

This book presents information on the following topics: molten salts in context; halides and methods of purification; specific methods for the preparation of halide melts; techniques for handling and experimentation with halide melts; haloaluminates; room-temperature alkylpyridinium haloaluminate melts; hydroxides; properties of practical interest for alkali and alkaline-earth metal hydroxides; influence of the components of air on the properties of molten hydroxides; containers and preparation of the melts; electrochemical techniques; analysis of water and of oxygen containing species; molten sulfates; ionized organic salts and their preparation and stability; and molten salts with organic anions and cations.

Similar Records