ELECTROCHEMICAL PROPERTIES OF «SULPHUR DIOXIDE – WATER» SYSTEM

R. Е. Khoma

doi:10.18524/2304-0947.2013.1(45).31463

ELECTROCHEMICAL PROPERTIES OF «SULPHUR DIOXIDE – WATER» SYSTEM

Odesa National University Herald Chemistry ◽

10.18524/2304-0947.2013.1(45).31463 ◽

2014 ◽

Vol 18 (1(45)) ◽

pp. 44

Author(s):

R. Е. Khoma

Keyword(s):

Electrochemical Properties ◽

Sulphur Dioxide ◽

Water System

Download Full-text

HYSTERESIS IN SILICA GEL SORPTION SYSTEMS

Canadian Journal of Research ◽

10.1139/cjr34-059 ◽

1934 ◽

Vol 10 (6) ◽

pp. 713-729 ◽

Cited By ~ 6

Author(s):

L. M. Pidgeon

Keyword(s):

Hysteresis Loop ◽

Silica Gel ◽

Sulphur Dioxide ◽

Water System ◽

The Other ◽

Vapor Pressures ◽

Large Pressure ◽

Pressure Changes ◽

Permanent Gases ◽

Sorption Systems

The hysteresis which normally appears in the isotherms of the silica gel-water system has been attributed by Patrick to the presence of permanent gases in the system. Only one case has been found in which a reversible isotherm has been recorded in the silica gel-water system. For alcohol and benzene only one case of hysteresis has been reported. These results seem to be independent of the presence or absence of air or other gases.The sorption of water, benzene and ethyl alcohol has been examined using the sorption balance. A hysteresis loop appears for water only. This hysteresis may not be eliminated by special methods of evacuation and must be considered as a real effect. The isotherms of alcohol and benzene, on the other hand, are completely reversible. It has been shown that the dimensions of the hysteresis occurring in the water system may be affected by the manner of addition of vapor to the apparatus. Only when the vapor pressures remain reasonably constant during sorption are the dimensions of the effect evident. If very large pressure changes take place the hysteresis may disappear.A comparison of the isotherms for water showing hysteresis, and those of the sulphur dioxide system (upon which the original suggestion as to the cause of hysteresis was based) show that there is not necessarily any relation between the two.

Download Full-text

Research on Electrochemical Properties of Alpha-Ni(OH)2 Prepared by Electrodeposition Method in the Ethanol and Water System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.311-313.1421 ◽

2011 ◽

Vol 311-313 ◽

pp. 1421-1424

Author(s):

Zheng Jin ◽

Bo Hong Li ◽

Chuan Li Qin ◽

Xiao Min Ren ◽

Shan Tao Yan ◽

...

Keyword(s):

Cyclic Voltammetry ◽

Electrochemical Properties ◽

Specific Capacitance ◽

Electrochemical Techniques ◽

Water System ◽

X Ray Diffraction ◽

Α Phase ◽

Deposition Voltage ◽

Deposition Technology

Electronic characterization, Electrochemical properties, Electrochemical techniques, Abstract. In this paper, the α-phase Ni(OH)2was directly deposited on the surface of foam nickel by electrochemical deposition technology. The characterization of the α-phase Ni(OH)2was studied by using X-ray diffraction(XRD), scanning electron microscopy(SEM), cyclic voltammetry(CV) and the constant charge-discharge. The specific capacitance of the a-phase Ni(OH)2electrode, measured using cyclic voltammetry at scan rate of 1mV•s-1, was found to be 2826.77F•g-1. For a simple supercapcitor, the highest specific capacitance(475.76 F•g-1at 30mA) is obtained at deposition voltage of 2.5V and deposition time of 50min.

Download Full-text