Electrochemical impedance spectroscopy analysis for oxygen reduction reaction in 3.5% NaCl solution
Data(s) |
01/03/2009
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Resumo |
The electrochemical impedance spectroscopy (EIS) at different potentials has been used to study the oxygen reduction reaction (ORR) in 3.5% NaCl solution on glassy carbon (GC) electrode in this work. Results show that ORR consists of three two-electron reaction steps and both superoxide ion (O-2(-)) and hydrogen peroxide (H2O2), which are produced by ORR, obstruct the diffusion of oxygen to the surface of the electrode and make the EIS results change into a transmissive finite diffusion process with the real part contraction and a reflective finite diffusion process from a semi-infinite diffusion process. The values of electron transfer resistance (R-t) and diffusion resistance (R-d) were calculated from EIS. O-2(-) influenced strongly on the Rt values and induced a maximum at -0.45 V. The electrochemical impedance spectroscopy (EIS) at different potentials has been used to study the oxygen reduction reaction (ORR) in 3.5% NaCl solution on glassy carbon (GC) electrode in this work. Results show that ORR consists of three two-electron reaction steps and both superoxide ion (O(2)(-)) and hydrogen peroxide (H(2)O(2)), which are produced by ORR, obstruct the diffusion of oxygen to the surface of the electrode and make the EIS results change into a transmissive finite diffusion process with the real part contraction and a reflective finite diffusion process from a semi-infinite diffusion process. The values of electron transfer resistance (R(t)) and diffusion resistance (R(d)) were calculated from EIS. O(2)(-) influenced strongly on the Rt values and induced a maximum at -0.45 V. |
Identificador | |
Idioma(s) |
英语 |
Fonte |
Kuang, Fei; Zhang, Dun; Li, Yongjuan; Wan, Yi; Hou, Baorong.Electrochemical impedance spectroscopy analysis for oxygen reduction reaction in 3.5% NaCl solution,JOURNAL OF SOLID STATE ELECTROCHEMISTRY,2009,13(3):385-390 |
Palavras-Chave | #Electrochemistry #Electrochemical impedance spectroscopy #Oxygen reduction reaction #3.5% NaCl solution #Cyclic voltammetry |
Tipo |
期刊论文 |