Electrochemistry of Mercury

Abstract

The sections in this article are Double‐layer Properties of Hg /Water Interface Potential of Zero Charge Surface Charge Density and Capacitive Current Experimental and Theoretical Studies of the Hg /Water Interface Double‐layer Properties of Hg /Nonaqueous Media Interface Adsorption and Electrode Reactions at Hg Surface Deposition and Underpotential Deposition of Hg on Various Electrodes Underpotential Deposition of Mercury on Gold Electrodes Film Electrodes and Related Hg Electrodes Adsorption and Electrode Reactions of Inorganic Ions and Coordination Compounds of Metal Ions Analytical Applications Adsorption and Electrode Reactions Involving Organic Compounds Organic Compounds Containing Sulfur, Selenium, and Tellurium Organic Nitrogen Compounds Indicators and Dyes Vitamins and Antibiotics Enzymes and Coenzymes Other Organic Compounds Analytical Aspects of Adsorption of Organic Compounds Ammonium and Quaternary‐substituted Ammonium Amalgams

Highly Selective Mercury Detection at Partially Oxidized Graphene/Poly(3,4-Ethylenedioxythiophene):Poly(Styrenesulfonate) Nanocomposite Film-Modified Electrode

“…The relation between I pa vs. square root of scan rate was linear, which indicated that the electrode reaction was diffusioncontrolled (Bard and Faulkner, 2001). However, at lower scan rates of up to 20 mV/s, the I pa showed only single oxidation peak, which may be due to a slower process, as the reaction occurs in one step: Hg 2+ + 2e− = Hg 0 (Orlik and Galus, 2007). The po-Gr/PEDOT:PSS-modified GCE showed a linear response for various Hg 2+ concentrations from 0.3 to 1.6 mM (R 2 = 0.997) ( Figure 8B).…”

“…These peaks are attributed to two welldefined one-electron steps, according to the two-step equation: Hg 2+ + e − = Hg + + e − = Hg 0 (Orlik and Galus, 2007). The presence of po-Gr on both bare GCE and PEDOT:PSS-modified GCE improved the peak current (I pa ) compared to that in the absence of po-Gr.…”

Experimental and Theoretical Investigations on Quadratic and Cubic Optical Nonlinearities of Cu(II), Co(II), Cd(II), Hg(II), Mn(II), and Zn(II) Transition Metal Coordination Complexes

“…The electrooxidation of Co­(I) to Co­(II) is fast and occurs at −1.369 V. At about −0.238 V, the reduction peaks corresponding to Co­(III)/Co­(II) reduction processes are observed. The subsequent reduction peak of Co­(II) → Co­(III) transformation is recorded at −0.980 V. The Cu­(MIPM) 2 Cl 2 complex shows two quasi-reversible peaks recorded at E 1/2 = 0.289 V and E 1/2 = −0.806 V corresponding to the electrochemical processes of Cu­(III)/Cu­(II) and Cu­(II)/Cu­(I), respectively. − In the case of mercury complex (Hg­(MIPM)­Cl 2 ), the voltammogram shows two well-defined redox systems at E 1/2 = −0.006 V and E 1/2 = −0.334 V. These peaks are attributed to two one-electron transfers of the couples Hg II+ /Hg I+ and Hg I+ /Hg 0 , respectively. , One irreversible cathodic peak was recorded at −1.511 V in the voltammogram of Zn­(MIPM) 2 Cl 2 . This peak corresponds to the reduction process of Zn­(II) to Zn(0).…”