交换电流密度

氧电化还原反应的交换电流密度很小，导致低温H2-O2燃料电池的极化主要发生在氧电极，严重影响了电池性能。

The exchange current density of the oxygen electrode is so low that the over-potential mostly happens on the cathode in the fuel cell .

Tafel曲线表明，添加剂降低了银电沉积过程的交换电流密度和电化学反应速度常数。

The results of Tafel curves showed the additive decrease the exchange current density values and electrode reaction rate constant .

通过电极动力学参数的比较，发现氧电化还原在合金催化剂上的交换电流密度比Pt／C催化剂上的提高了2倍，减小了氧电极的活化极化，提高了催化剂的抗烧结能力。

By the contrast of the two kinds of catalysts ' electrode kinetic parameters , we find that the exchange current density of cathode doubled .

ZrO2高温固态电极交换电流密度的研究

A Study on Exchange Current Density of ZrO_2 Solid Electrode at High Temperature

然而，催化剂的利用率不仅受电极内IR降的影响，还受电化学反应的交换电流密度的影响。

However , the utilization of catalyst surface is not only affected by the IR drop within the electrode but also by the eXChange current density of the targeted reaction .

Sb（Ⅲ）、Bi（Ⅲ）离子均使铜沉积反应交换电流密度减小，对铜沉积过程起极化作用；

Sb (ⅲ) and Bi (ⅲ) ions , on the contrary , decreased the density of exchange current and had an action of polarization on the process of copper deposition .

计算出反应动力学参数，交换电流密度为5.26×10-5A/cm2。V（IV）的氧化反应机理研究表明，V（IV）氧化反应存在一个电子转移和两个质子转移。

The exchange current density was calculated as 5.26 × 10-5 A / cm2 . The results indicated that the mechanism of V ( IV ) oxidation is the reaction with one-electron transfer and two-proton transfer .

钳制电压为-100mV时，正常细胞的内向交换电流密度为0.42±0.14pA／pF，肥厚细胞达1.12±0.33pA／pF（P＜0.001）。

At a holding potential of - 100 mV , the inward current densities were 0.42 ± 0.14 pA / pF in normal cells ana 1.12 ± 0.33 pA / pF in hypertrophied cells ( P < 0.001 ) .

利用Fe~（2+）、pd~（2+）、Pd-Fe合金共沉积的TAFEL曲线，通过拟合计算分别得出三种不同体系中的交换电流密度与传递系数等动力学参数；

Second , current density of exchange and transferring coefficient are calculated by attributing the TAFEL curves of Fe2 + , Pd2 + and Pd-Fe .

非晶态Ni-S-Co合金电极的析氢催化性能较好，与Ni和Ni-S电极相比具有较低的析氢过电位、较高的交换电流密度和较低的表观活化能；

The Ni-S-Co alloy is catalytically more active in comparison with Ni and Ni-S electrode with its lower potential for hydrogen evolution , higher exchange current density and lower activation energy .

Ti0.17Zr0.08V0.34Cu0.01Cr0.1Ni0.3氢化物电极的电化学阻抗谱表明，电极电化学反应的电荷转移电阻（RT）随温度的增加而显著降低，交换电流密度（I0）随温度的增加显著增加。

The result of electrochemical impedance spectrometry ( EIS ) indicates that charge transfer resistance ( R_T ) is decrease with increasing temperature , while exchanging current density is increase with increasing temperature .

结果表明：在80℃碱性溶液中的NiSZr的析氢催化性能较好，与Ni，NiS电极相比具有较高的表观交换电流密度、较小的反应电阻及较大的表面粗糙度。

Impedance technique . The results show that the alloy Ni S Zr is catalytically more active in comparison with Ni and Ni S electrodes in alkaline solution at 80 ℃ . Its electro catalytic activites are attributed to the large roughness factor and the small reaction resistance .

根据半导体电化学能带模型和腐蚀电化学混合电位模型，晶格畸变导致晶体费米能级EF升高和交换电流密度增大，从而使黄铁矿腐蚀电流增大，腐蚀速率提高。

According to energy band model of semiconductor and mixed potential model of corrosion electrochemistry , the corrosion current of pyrite increases with the increase of pyrite Fermi energy ( E F ) and exchange current density , that is , the rate of dissolution increases .

Sb3＋和Bi3＋均使铜沉积反应的交换电流密度i0减小，对铜沉积过程起极化作用；

Sb 3 + and Bi 3 + ions decreases the density of exchange current of copper deposition reaction , and has an action of polarization on the process of copper deposition .

用计算机拟合极化曲线，研究不同比表面积和孔容积的活性炭对氧气还原反应的交换电流密度、Tafel斜率、电阻等参数的影响。

Effects of active carbon powders on kinetic parameters of oxygen reduction reaction , such as exchange current density ( i_o ), Tafel slope ( b ), reaction resistance ( R ), are given by the computer curve fitting to polarization data .

采用线性极化的方法，控制电极过电势小于5mV，测量出不同荷电容量下电化学反应的交换电流密度。电极在满充电状态下i0并非最大，当电极部分放电后该值达到最大。

Exchange current density of the electrochemical reaction at different charge state was measured by linear polarization method with the overpotential less than 5 mV . Exchange current density reaches the maximum after a part of capacity is released from the full charged electrodes .

钯在玻碳电极上的交换电流密度很低；

The exchange current density of palladium on GC electrode was very low .

铂碳复合电极交换电流密度测试分析

The Test and Analysis of the Exchang Current Density of the Platinum Carbon Compound Electrodes

纳米碳管-钙钛石复合催化剂氧电极交换电流密度的测试与分析

The test and analysis of the exchange current density of the carbon nanotube and perovskite compound oxygen electrodes

计算了阳极活性溶解反应的交换电流密度和阳极电化学反应的速度常数等动力学参数。

The kinetic parameters , e.g. the exchange current density and velocity constants of the anodic reaction , were evaluated .

根据线性扫描伏安曲线计算了阴阳极交换电流密度、表观传递系数、活化能、反应级数等电极动力学参数。

Apparent activation energy , apparent transfer coefficient , exchange current density , and the reaction order were obtained by LSV technique .

塔菲尔曲线显示改性前后交换电流密度分别为0.05A/m2,0.17A/m2。

Tafel curve shows the exchange current density before and after modification were respectively 0.05 A / m2 and 0.17 A / m2 .

当氢化物电极中贮氢容量较小时，电极反应的交换电流密度与电极中贮氢容量存在对数值的线性关系。

The relationship of logarithm of exchange current density and rest capacity of electrodes is linear when the rest capacity is relatively low .

还利用此模型分析了各操作与设计参数如入口流速、流道深度、交换电流密度等对浓度、流速和电流密度分布的影响。

An analysis of the effects of main operation and design parameters on the distributions of concentration , velocity and current density was conducted .

在此基础上求出了铂炭复合电极的交换电流密度、塔菲尔常数和对称系数等有关电化学参数。

Based on the curves , the exchange electrical current density of the platinum carbon compound electrode , Tafel constant and symmetry coefficient are obtained .

提高氧还原反应交换电流密度、减小电极电阻、优化流道尺寸可改善电池性能；

The performance of PEMFCs would be promoted with increasing exchange current density of oxygen reduction reaction , decreasing resistance of electrode and optimizing geometric parameter of flow field .

实验结果表明：铂碳复合电极制备过程中碳材料的选取对其制备的复合电极交换电流密度有着非常重要的影响。

The results show that the choice of carbon materials in the process of the electrods has very important effect on the exchange current densities of the platinum carbon compound electrodes .

同时，根据氢分压对极化电阻、交换电流密度以及极限电流密度的影响估算了氢气氧化反应的表观反应级数。

The empirical reaction order was estimated from the dependence of electrode polarization resistance , exchange current density , and limiting current density on the hydrogen partial pressure ( PH2 ) .

过渡状态理论分析表明机械活化提高了化学反应速率常数，即交换电流密度（J0FeS2，J0O2）增大。

In addition , according to transitional state theory , mechanical activation promotes the rate constant of chemical reaction , which is equivalent to exchange current density in the field of corrosion electrochemistry .

实验结果表明，在80℃、25%氢氧化钠碱性溶液中镍-磷-二氧化锆的表观交换电流密度及表面粗糙度皆大于镍、镍-磷电极，而反应电阻较小。

Testing at 80 ℃ in 25 % sodium hydroxide solution , its apparent exchange current density and surface roughness were higher , and reaction resistance lower than that of nickel and nickel-phosphorus electrode .