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The influence of KOH concentration, oxygen partial pressure and temperature on the oxygen reduction reaction at Pt electrodes
Yan, Wen-Yi1; Zheng, Shi-Li1; Jin, Wei3; Peng, Zhong1,2; Wang, Shao-Na1; Du, Hao1; Zhang, Yi1
2015-03-15
Source PublicationJOURNAL OF ELECTROANALYTICAL CHEMISTRY
ISSN1572-6657
Volume741Issue:MARPages:100-108
Abstract

In this paper, cyclic voltammetry (CV), linear sweep voltammety (LSV) and rotating ring-disk electrode (RRDE) techniques were employed to investigate the influence of alkali concentration, oxygen partial pressure, and temperature on oxygen reduction reaction (ORR) at Pt electrodes in KOH solutions. It was found that as the KOH concentration increases, the ORR kinetics is greatly inhibited, and the ORR pathway gradually shifts from 4 electrons transfer reaction by directly forming OH- to 2 electrons transfer reaction by forming HOT. The intermediate species were detected by electrogenerated chemiluminescence and ultraviolet-visible spectrophotometer to confirm the alkali concentration-dependent ORR pathway. In addition, the ORR kinetics was found to be significantly improved by the increasing oxygen partial pressure due to the corresponding increase of oxygen solubility. However, the temperature exhibits dual effects toward ORR and the optimal temperature for the ORR was obtained in given alkaline solutions. The activation energy of ORR was calculated based on the RRDE data. (C) 2015 Elsevier B.V. All rights reserved.

KeywordOxygen Reduction Reaction Cyclic Voltammetry Linear Sweep Voltammetry Rotating Ring-disk Electrode Chemiluminescence Activation Energy
SubtypeArticle
Subject AreaChemistry ; Electrochemistry
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.jelechem.2014.12.044
Indexed BySCI
Language英语
WOS KeywordFuel-cell Applications ; Hydrogen-peroxide ; Alkaline Electrolyte ; Metal-surfaces ; Platinum ; Electrocatalysis ; Kinetics ; Solubility ; Adsorption ; Pt(111)
Funding ProjectNational Basic Research Program of China (973 Program) [2013CB632601] ; National Natural Science Foundation [51274178, 51274179, 51090382]
WOS Research AreaChemistry ; Electrochemistry
WOS SubjectChemistry, Analytical ; Electrochemistry
WOS IDWOS:000351794400015
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13805
Collection研究所(批量导入)
Corresponding AuthorDu, Hao
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydrametallurg Cleaner Prod Technol, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Tianjin Univ, Sch Chem Engn, Tianjin 300072, Peoples R China
3.Missouri Univ Sci & Technol, Mat Res Ctr, Dept Mat Sci & Engn, Rolla, MO 65409 USA
Recommended Citation
GB/T 7714
Yan, Wen-Yi,Zheng, Shi-Li,Jin, Wei,et al. The influence of KOH concentration, oxygen partial pressure and temperature on the oxygen reduction reaction at Pt electrodes[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY,2015,741(MAR):100-108.
APA Yan, Wen-Yi.,Zheng, Shi-Li.,Jin, Wei.,Peng, Zhong.,Wang, Shao-Na.,...&Zhang, Yi.(2015).The influence of KOH concentration, oxygen partial pressure and temperature on the oxygen reduction reaction at Pt electrodes.JOURNAL OF ELECTROANALYTICAL CHEMISTRY,741(MAR),100-108.
MLA Yan, Wen-Yi,et al."The influence of KOH concentration, oxygen partial pressure and temperature on the oxygen reduction reaction at Pt electrodes".JOURNAL OF ELECTROANALYTICAL CHEMISTRY 741.MAR(2015):100-108.
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