SHE standard hydrogen

CA—chronoamperometry, CV—cyclic voltammetry, SWV—square wave voltammetry, ASV—anodic stripping voltammetry, SHE—standard hydrogen electrode. 

SHE, standard hydrogen electrode The electrode used as a standard against which aU other half-cell potentials are measured. The following reaction occurs at the platinum electrode when immersed in an acidic solution and cormected to the other half of an electrochemical cell 2H (aq) -H 2e —> H2(g). The half- cell potential of this reaction at 25°C, 1 atm and 1 m concentrations of aU solutes is agreed, by convention, to be OV... 

FIGURE 5 Typical potential sweep diagram on a zinc electrode. Current density decreases rapidly near -900 mV versus SHE (standard hydrogen electrode) as reaction products cover the electrode surface and passivate the electrode. 

The hydrogen electrode. The hydrogen electrode is discussed first because it is the primary reference electrode used to define an internationally accepted scale of standard potentials in aqueous solution. By convention, the potential of an electrode half-reaction that is measured with respect to the normal hydrogen electrode (NHE also written as SHE, standard hydrogen electrode) is defined as the electrode potential of the half reaction. This convention amounts to an arbitrary assignment for the standard potential of the hydrogen electrode as zero at all temperatures. Thus, there is in effect a separate scale of electrode potentials at each temperature level. 

EPR EXAFS electron paramagnetic resonance extended X-ray absorption fine structure SHE standard hydrogen electrode... 

Abbreviations APX, ascorbate peroxidase pAPX, pea cytosolic APX CcP, cytochrome c peroxidase HRP, horseradish peroxidase Lip, lignin peroxidase MnP, manganese peroxidase PNP, peanut peroxidase ARP, Arthromyces ramosus peroxidase 5-c/HS, 5-coordinate, high-spin heme 6-c/HS, 6-coordinate, high-spin heme 6-c/LS, 6-coordinate, low-spin heme SHE, standard hydrogen electrode. 

SHE (standard hydrogen electrode), 622 sickle cell anemia, 721, 721/ side reactions, 316 significant figures, 56-59, 56/ 57/ in molar mass calculations, 233, 233/ in scientific notation, 62-63... 

Note Abbreviations TBN tetrabutylammonium ion SHE standard hydrogen electrode PC polycrystalline EP electrochemically polished CP chemically polished EG electrochemically grown. 

Studied cell characteristics Polycrystalline photoelectrode, Pt counter electrode, Aredox of Fe +/Fe + = 0.77 V vs SHE, standard hydrogen electrode illumination 40-50 mW cm by a tungsten lamp, initial current during discharge =... 

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