hidrogénelektrodával

The term "hidrogénelektroda" translates from Hungarian to "hydrogen electrode". It refers to an electrode where hydrogen gas participates in an electrochemical reaction. The most common type is the standard hydrogen electrode (SHE), which serves as a reference point for measuring electrode potentials. In the SHE, hydrogen gas at a pressure of one atmosphere is bubbled over a platinum electrode in a solution containing hydrogen ions at unit activity. The equilibrium established is 2H+ + 2e- ⇌ H2. The potential of the SHE is defined as zero volts at all temperatures. Other variations of hydrogen electrodes exist, often used in specific analytical applications or as components in fuel cells. These may involve different pressures of hydrogen or different electrolyte compositions. The fundamental principle remains the involvement of hydrogen in redox reactions at the electrode surface. The development and understanding of hydrogen electrodes have been crucial in the field of electrochemistry, enabling the study and quantification of other electrode reactions.