过电位（英语：overpotential）是电极的电位差值。又叫超电势。为一个电极反应偏离平衡时的电极电位与这个电极反应的平衡电位的差值，无电流通过（平衡状态下）和有电流通过之电位差值。
氧过电位 [化学] oxygen overpotential
活化过电位 activation overpotential ; charge transfer overpotentia
阳极过电位 anodic overvoltage ; anodic overpotential
氢过电位 [化学] hydrogen overpotential
欧姆过电位 Ohmic Overpotential
阴极过电位 cathodic overpotenial
浓度过电位 Concentration Overpotential
化学过电位 chemical overpotential
电子传递过电位 charge transfer overpotentia
Anodic overpotential is one of the main reasons for low efficiency of industrial water electrolysis. Therefore , the study of anode material with high activity, long life, low-cost has a practical significance for large-scale industrial electrolysis hydrogen.
电解水制氢过程无污染,且可循环使用,有着很大的发展潜力,阳极过电位是水电解工业能量转换效率较低的主要原因之一,因此研究高活性、长寿命、低成本的阳极材料对大规模工业化电解制氢具有节能增效的现实意义。
参考来源 - 钛基贵金属氧化物电极的制备及析氧性能研究Indium had characteristic of low electrical resistivity, high deformation, high chemical stability and high hydrogen evolution overpotential.
铟具有低的电阻率、高的可塑性、高的析氢过电位和高的化学稳定性。
参考来源 - 铟在无汞碱性锌锰电池中的应用·2,447,543篇论文数据，部分数据来源于NoteExpress
再通过电位梯度求得电场强度分布。
The electric field intensity distribution was acquired through potential gradient.
再通过电位梯度求得电场强度分布。
Potential distribution was acquired by analyzing Laplace's equation.
从电化学理论上讨论了阴极、阳极过电位与电流密度的关系。
The authors discussed the relationship that the overvoltage of cathode and anode are varied with the current density in terms ofthe electrochemistry.
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