original_query: What is the definition of electrode potential in electrochemistry?
query: What is the definition of electrode potential in electrochemistry?
answer: In electrochemistry, electrode potential is the electromotive force of a galvanic cell built from a standard reference electrode (like the standard hydrogen electrode, SHE, with a potential of zero volts) and another electrode to be characterized.  It's the potential difference between the charged metallic rods and salt solution, originating from the potential difference at the electrode-electrolyte interface due to charge transfer, ion adsorption, and polar molecule adsorption/orientation.