| 单词 | hydrogen half cell |
| 释义 | hydrogen half cell(hydrogen electrode) A type of half cell in which a metal foil is immersed in a solution of hydrogen ions and hydrogen gas is bubbled over the foil. The standard hydrogen electrode, used in measuring standard electrode potentials, uses a platinum foil with a 1.0 M solution of hydrogen ions, the gas at 1 atmosphere pressure, and a temperature of 25°C. It is written Pt(s) | H2(g), H+(aq), the effective reaction being summarized in the equation H2→ 2H+ + 2e |
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