典型文献
Identifying Diffusion Limiting Current to Unravel the Intrinsic Kinetics of Electrode Reactions Affected by Mass Transfer at Rotating Disk Electrode
文献摘要：
Rotating disk electrode systems are widely used to study the kinetics of electrocatalytic reactions that may suffer from insufficient mass transfer of the reac-tants.Kinetic current density at certain overpotential calculated by the Koutecky-Levich equation is com-monly used as the metrics to evaluate the activity of electrocatalysts.However,it is frequently found that the diffusion limiting current density is not correctly identified in the literatures.Instead of kinetic current density,the measured current density normalized by diffusion limiting current density(j/jL)has also been frequently under circumstance where its validity is not justified.By taking oxygen reduction reaction/hydrogen oxidation reaction/hydrogen evolution reaction as examples,we demon-strate that identifying the actual diffusion limiting current density for the same reaction under otherwise identical conditions from the experimental data is essential to accurately deduce kinetic current density.Our analysis reveals that j/jL is a rough activity metric which can only be used to qualitatively compare the activity trend under conditions that the mass transfer conditions and the roughness factor of the electrode are exactly the same.In addition,if one wants to use j/jL to compare the intrinsic activity,the concentration overpotential should be eliminated.
文献关键词：
中图分类号：
作者姓名：
Mian-le Xu;Wei Chen;Ling-wen Liao;Zhen Wei;Jun Cai;Yan-xia Chen
作者机构：
Hefei National Laboratory for Physical Sciences at the Microscale,Department of Chemical Physics,University of Science and Technology of China,Hefei 230026,China
文献出处：
引用格式：
[1]Mian-le Xu;Wei Chen;Ling-wen Liao;Zhen Wei;Jun Cai;Yan-xia Chen-.Identifying Diffusion Limiting Current to Unravel the Intrinsic Kinetics of Electrode Reactions Affected by Mass Transfer at Rotating Disk Electrode)[J].化学物理学报（英文版）,2022(05):797-804
A类：
Unravel,Koutecky,Levich,jL
B类：
Identifying,Diffusion,Limiting,Current,Intrinsic,Kinetics,Electrode,Reactions,Affected,by,Mass,Transfer,Rotating,Disk,disk,electrode,systems,widely,used,study,kinetics,electrocatalytic,reactions,that,may,suffer,from,insufficient,mass,transfer,tants,current,density,certain,overpotential,calculated,equation,monly,metrics,evaluate,activity,electrocatalysts,However,frequently,found,diffusion,limiting,not,correctly,identified,literatures,Instead,measured,normalized,has,also,been,under,circumstance,where,its,validity,justified,By,taking,oxygen,reduction,hydrogen,oxidation,evolution,examples,demon,strate,identifying,actual,same,otherwise,identical,conditions,experimental,data,essential,accurately,deduce,Our,analysis,reveals,which,can,qualitatively,compare,trend,roughness,exactly,addition,one,wants,intrinsic,concentration,should,eliminated
AB值：
0.538593
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