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Hydrogen Electrode Potential
On the hydrogen electrode potential
Between heaven and earth, yin and yang sympathize, and all things change. In the field of electrochemistry, the hydrogen electrode potential is actually a key element, guiding the direction and process of many reactions.
Hydrogen electrode potential is based on the standard hydrogen electrode standard. The standard hydrogen electrode is composed of a platinum sheet plated with platinum black, immersed in a solution with hydrogen ion activity of 1mol/L, and continuously punched with hydrogen at a pressure of 100 kPa. It stipulates that the electrode potential of this standard hydrogen electrode is zero volts, which is like the datum of the earth, laying the foundation for the measurement of all electrode potentials.
In the actual reaction, the change of the potential of the hydrogen electrode is related to the difficulty and trend of the reaction. If an electrode and a standard hydrogen electrode form a primary battery, and the positive and negative electromotive forces are measured, the potential of the electrode relative to the standard hydrogen electrode can be inferred. If the potential of the hydrogen electrode is positive, it indicates that the oxidized substance of the electrode has a stronger electronic capacity than the hydrogen ion; if it is negative, the opposite is true. The electronic capacity of the oxidized substance is inferior to that of the hydrogen ion.
The potential of the hydrogen electrode is affected by many factors. The rise and fall of temperature can shift the rate and equilibrium of the electrode reaction, thereby changing the hydrogen electrode potential. The pH of the solution, that is, the change of the concentration of hydrogen ions, also has a significant impact on it. According to the Enernst equation, the hydrogen electrode potential has a linear relationship with the logarithm of hydrogen ion concentration. When the hydrogen ion concentration increases, the hydrogen electrode potential increases; when the hydrogen ion concentration decreases, the hydrogen electrode potential decreases.
Furthermore, the properties of the electrode material also affect the hydrogen electrode potential. Different electrode materials have different adsorption and desorption capabilities for hydrogen atoms, which in turn affect the reaction process of the electrode surface and the value of the hydrogen electrode potential.
Overall, the hydrogen electrode potential is like a bright light in the electrochemical system. Only by clarifying its principles and influencing factors can we gain insight into the essence of the reaction and control the process of the reaction in electrochemical research and application, providing a solid theoretical basis and practical guidance for energy development, material corrosion prevention, chemical synthesis, and many other fields.
Between heaven and earth, yin and yang sympathize, and all things change. In the field of electrochemistry, the hydrogen electrode potential is actually a key element, guiding the direction and process of many reactions.
Hydrogen electrode potential is based on the standard hydrogen electrode standard. The standard hydrogen electrode is composed of a platinum sheet plated with platinum black, immersed in a solution with hydrogen ion activity of 1mol/L, and continuously punched with hydrogen at a pressure of 100 kPa. It stipulates that the electrode potential of this standard hydrogen electrode is zero volts, which is like the datum of the earth, laying the foundation for the measurement of all electrode potentials.
In the actual reaction, the change of the potential of the hydrogen electrode is related to the difficulty and trend of the reaction. If an electrode and a standard hydrogen electrode form a primary battery, and the positive and negative electromotive forces are measured, the potential of the electrode relative to the standard hydrogen electrode can be inferred. If the potential of the hydrogen electrode is positive, it indicates that the oxidized substance of the electrode has a stronger electronic capacity than the hydrogen ion; if it is negative, the opposite is true. The electronic capacity of the oxidized substance is inferior to that of the hydrogen ion.
The potential of the hydrogen electrode is affected by many factors. The rise and fall of temperature can shift the rate and equilibrium of the electrode reaction, thereby changing the hydrogen electrode potential. The pH of the solution, that is, the change of the concentration of hydrogen ions, also has a significant impact on it. According to the Enernst equation, the hydrogen electrode potential has a linear relationship with the logarithm of hydrogen ion concentration. When the hydrogen ion concentration increases, the hydrogen electrode potential increases; when the hydrogen ion concentration decreases, the hydrogen electrode potential decreases.
Furthermore, the properties of the electrode material also affect the hydrogen electrode potential. Different electrode materials have different adsorption and desorption capabilities for hydrogen atoms, which in turn affect the reaction process of the electrode surface and the value of the hydrogen electrode potential.
Overall, the hydrogen electrode potential is like a bright light in the electrochemical system. Only by clarifying its principles and influencing factors can we gain insight into the essence of the reaction and control the process of the reaction in electrochemical research and application, providing a solid theoretical basis and practical guidance for energy development, material corrosion prevention, chemical synthesis, and many other fields.
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