1) overpotential
['əuvəpə'tenʃəl]
过电位
1.
On the given solution composition and electro-deposition current and temperature, the influence of the electro-deposition time on the hydrogen evolution reaction overpotentials of the Ni-S alloy was analyzed.
采用电沉积法在镍网上制备Ni-S合金,在固定的溶液组成、电镀的电流密度和温度的条件下,研究电沉积时间对电极析氢过电位的影响。
2.
In order to investigate the distribution of concentration, current density and overpotential in DMFC, a one-dimensional mathematic model including anode diffusion layer, anode catalyst layer, polymer electrolyte membrane, cathode catalyst layer and cathode diffusion layer is established.
从模拟结果可以看到,在阳极扩散层由于甲醇氧化反应速率较大,甲醇在阳极催化层两侧的浓度梯度大于阳极扩散层浓度梯度;由于扩散层厚度远远大于催化层厚度,甲醇在阳极扩散层的浓度差比在阳极催化层的浓度差大;在阴极催化层由于甲醇氧化反应速率较小,甲醇浓度变化很小;电池内膜相电位不同导致各处过电位不同。
3.
0Pa,catalysis electrode films of NiFe,CoMo of HER prepared at different sputtering pressure,their crystal size and HER overpotential decreased with increasing of chamber pressure,and their overpotential and Tafel slope were changed sharply at 2.
0Pa的范围内,不同溅射腔气压条件下制备的电极材料的晶粒尺寸、析氢反应的过电位与气压的关系,结果显示过电位随气压升高而降低,而且在2。
2) electrofiltration potential
过滤电位
1.
A method of quickly discerning and calculating electrofiltration potential and its application in low porosity and low permeability oilfield;
一种快速识别和求取过滤电位的方法及在低孔低渗油田的应用
2.
Experimental analysis of the effects of core permeability on formation electrofiltration potential;
岩心渗透率对地层过滤电位影响的实验分析
3.
Low spontaneous potential (SP) amplitude of thin and poor water flooded reservoir may be caused by several factors, such as thin layer, high shale content, influenced by residual hydrocarbon after water out and electrofiltration potential.
层厚薄、泥质体积分数大、水淹后存在残余烃类、过滤电位异常是影响薄差水淹储层自然电位幅值高低的主要因素。
4) large overpotential
大过电位
1.
The large overpotential of the Polypyrrole film is interesting but generally ignored,in this paper,the formation theory of the large overpotential and surface microcosmic structure change of the film are studied systemically.
导电聚吡咯薄膜的大过电位是一个有趣而被忽视的现象,针对它在形成机理、膜表面微观结构等方面进行了系统实验研究。
5) overpotential
['əuvəpə'tenʃəl]
过电压，过电势;过电位
6) cathodic overpotential
阴极过电位
1.
The paper describes the effect on the addictive and principle and method of controlling cathodic overpotential during the refinement in copper electrolysis.
研究了铜电解精炼过程中添加剂的作用与阴极过电位控制法的原理和方法。
2.
The results show that through on-line control of cathodic overpotential,the optimum amount of additives can be determined under different electrolysis conditions and separated quality,and glabrous of cathodic nickel can be raised efficiently in complicated nickel electrolysis.
结果表明:通过阴极过电位的在线监控可得出在不同电解条件时,添加剂最佳量的控制,从而在复杂镍电解过程中显著提高析出阴极镍的质量和光洁度,使零号镍生产的稳定性提高5%,平均电流效率提高1%。
补充资料：过电位
分子式：
CAS号：
性质：对于某一电极反应，当电极电势正偏离其平衡电极电势Ep时，其偏离值称为超电势，或称过电位。η=E-Ep。这是该电极反应得以进行的推动力。电极反应一般都有迁越步骤和扩散步骤，这两个步骤的超电势分别称迁越超电势ηCT和扩散超电势ηd。有时电极反应还伴随有一些偶联化学反应，这些反应的超电势通称反应超电势ηr。上述各步骤若是前后衔接的，整个电极反应的超电势为各个衔接步骤超电势之和。
CAS号：
性质：对于某一电极反应，当电极电势正偏离其平衡电极电势Ep时，其偏离值称为超电势，或称过电位。η=E-Ep。这是该电极反应得以进行的推动力。电极反应一般都有迁越步骤和扩散步骤，这两个步骤的超电势分别称迁越超电势ηCT和扩散超电势ηd。有时电极反应还伴随有一些偶联化学反应，这些反应的超电势通称反应超电势ηr。上述各步骤若是前后衔接的，整个电极反应的超电势为各个衔接步骤超电势之和。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条