Wasserstoffelektrode

Wasserstoffelektrode refers to an electrode where the electrochemical reaction involves hydrogen. It is a fundamental component in electrochemistry, particularly in the study of redox reactions. There are two main types: the standard hydrogen electrode (SHE) and the non-standard hydrogen electrode. The SHE serves as a reference point for measuring electrode potentials. It consists of a platinum electrode immersed in a solution with a hydrogen ion activity of 1 mol/kg, through which hydrogen gas at a pressure of 1 bar is bubbled. The potential of the SHE is defined as exactly 0 volts at all temperatures. A non-standard hydrogen electrode has conditions that deviate from those of the SHE, and its potential is measured relative to the SHE. Hydrogen electrodes are utilized in various applications, including fuel cells, batteries, and electrochemical sensors. The efficiency and performance of these devices are directly influenced by the characteristics of the hydrogen electrode.