Higher order derivative voltammetry for reversible and irreversible electrode processes under spherical diffusion

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• 作者：Tae-Kee Hong^a ; ^{tkhong1@hanseo.ac.kr} ; Iason Rusodimos^b ; ^{irusodimos@gsu.edu} ; Myung-Hoon Kim^c ; ^{mkim124@gsu.edu}
• 关键词：Derivative voltammetry ; Heterogeneous kinetics ; Spherical electrodes reversible ; Quasi-reversible ; Irreversible electron transfer
• 刊名：Journal of Electroanalytical Chemistry
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：785
• 期：Complete
• 页码：255-264
• 全文大小：1157 K
• 卷排序：785

文摘

Analytical expressions for current-potential-time under spherical diffusion and its higher derivatives are obtained. The derivatives are plotted to find out how the heterogeneous kinetics influences the symmetry in various peaks observed. The symmetry is analyzed in terms of ratios of peak-heights, half-peak-widths, and peak potentials differences. The results are compared between planar and spherical electrodes to find striking differences between them.