“electrode potential”的概念、定义、翻译、参考文献-科学参考

electrode potential

Physics

The potential difference produced between the electrode and the solution in a half cell. It is not possible to measure this directly since any measurement involves completing the circuit with the electrolyte, thereby introducing another half cell. Standard electrode potentials E^⦵ are defined by measuring the potential relative to a standard hydrogen half cell using 1.0 molar solution at 25°C. The convention is to designate the cell so that the oxidized form is written first. For example,

${Pt (s) | H}_{2} (g) H^{+} (aq) | {Zn}^{2 +} (aq) | Zn (s)$

The e.m.f. of this cell is −0.76 volt (i.e. the zinc electrode is negative). Thus the standard electrode potential of the Zn²⁺|Zn half cell is −0.76 V. Electrode potentials are also called reduction potentials. See also electromotive series.

Chemistry

The potential difference produced between the electrode and the solution in a half cell. It is not possible to measure this directly since any measurement involves completing the circuit with the electrolyte, thereby introducing another half cell. Standard electrode potentials E^⦵ are defined by measuring the potential relative to a standard hydrogen half cell using 1.0 molar solution at 25°C. The convention is to designate the cell so that the oxidized form is written first. For example,
$Pt (s) | H_{2} (g) H^{+} (aq) | {Zn}^{2 +} (aq) | Zn (s)$
The e.m.f. of this cell is –0.76 volt (i.e. the zinc electrode is negative). Thus the standard electrode potential of the Zn²⁺|Zn half cell is –0.76 V. Electrode potentials are also called reduction potentials. See also electromotive series.

Chemical Engineering

The potential difference between an electrode and the solution in a half-cell. This is not able to be measured directly but instead standard electrode potentials E^° are defined by measuring the potential relative to a standard hydrogen half-cell using molar solution at 25°C. By convention, the cell is written with the oxidized cell first. Published tables are used that list standard electrode potentials. For example, the standard electrode potential of the half-cell Cu|CuSO₄ is 0.34 volt, and the standard electrode potential of the half-cell Ag|AgNO₃ is 0.80 volt. The e.m.f. of a cell Cu|CuSO₄| AgNO₃|Ag is therefore 0.46 volt.

Electronics and Electrical Engineering

See electrochemical series.

Geology and Earth Sciences

See oxidation potential; potential electrode.

单词	electrode potential
释义	electrode potential Physics The potential difference produced between the electrode and the solution in a half cell. It is not possible to measure this directly since any measurement involves completing the circuit with the electrolyte, thereby introducing another half cell. Standard electrode potentials E^⦵ are defined by measuring the potential relative to a standard hydrogen half cell using 1.0 molar solution at 25°C. The convention is to designate the cell so that the oxidized form is written first. For example, ${Pt (s) \| H}_{2} (g) H^{+} (aq) \| {Zn}^{2 +} (aq) \| Zn (s)$ The e.m.f. of this cell is −0.76 volt (i.e. the zinc electrode is negative). Thus the standard electrode potential of the Zn²⁺\|Zn half cell is −0.76 V. Electrode potentials are also called reduction potentials. See also electromotive series. Chemistry The potential difference produced between the electrode and the solution in a half cell. It is not possible to measure this directly since any measurement involves completing the circuit with the electrolyte, thereby introducing another half cell. Standard electrode potentials E^⦵ are defined by measuring the potential relative to a standard hydrogen half cell using 1.0 molar solution at 25°C. The convention is to designate the cell so that the oxidized form is written first. For example, $Pt (s) \| H_{2} (g) H^{+} (aq) \| {Zn}^{2 +} (aq) \| Zn (s)$ The e.m.f. of this cell is –0.76 volt (i.e. the zinc electrode is negative). Thus the standard electrode potential of the Zn²⁺\|Zn half cell is –0.76 V. Electrode potentials are also called reduction potentials. See also electromotive series. Chemical Engineering The potential difference between an electrode and the solution in a half-cell. This is not able to be measured directly but instead standard electrode potentials E^° are defined by measuring the potential relative to a standard hydrogen half-cell using molar solution at 25°C. By convention, the cell is written with the oxidized cell first. Published tables are used that list standard electrode potentials. For example, the standard electrode potential of the half-cell Cu\|CuSO₄ is 0.34 volt, and the standard electrode potential of the half-cell Ag\|AgNO₃ is 0.80 volt. The e.m.f. of a cell Cu\|CuSO₄\| AgNO₃\|Ag is therefore 0.46 volt. Electronics and Electrical Engineering See electrochemical series. Geology and Earth Sciences See oxidation potential; potential electrode.
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