摘要
As compared with the standard hydrogen electrode potential, the potentials （φ<sup>°</sup>） of Cu<sup>2+</sup>/Cu and Cu<sup>+</sup>/Cu are 0.34V and 0.52V respectively, and therefore neither the cell reaction Cu+ 2H<sup>+</sup> = Cu<sup>2+</sup>+H<sub>2</sub> nor the Cu+H<sup>+</sup>=Cu<sup>+</sup>+1/2 H<sub>2</sub> can take place.
