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 | |
刊名 | JOURNAL OF ELECTROANALYTICAL CHEMISTRY |
2015-03-15 | |
卷号 | 741期号:MAR页码:100-108 |
关键词 | Oxygen reduction reaction Cyclic voltammetry Linear sweep voltammetry Rotating ring-disk electrode Chemiluminescence Activation energy |
ISSN号 | 1572-6657 |
通讯作者 | Du, H (reprint author), 1 North 2nd St, Beijing 100190, Peoples R China. |
英文摘要 | 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. |
学科主题 | Chemistry ; Electrochemistry |
WOS标题词 | Science & Technology ; Physical Sciences |
类目[WOS] | Chemistry, Analytical ; Electrochemistry |
研究领域[WOS] | Chemistry ; Electrochemistry |
关键词[WOS] | FUEL-CELL APPLICATIONS ; HYDROGEN-PEROXIDE ; ALKALINE ELECTROLYTE ; METAL-SURFACES ; PLATINUM ; ELECTROCATALYSIS ; KINETICS ; SOLUBILITY ; ADSORPTION ; PT(111) |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000351794400015 |
内容类型 | 期刊论文 |
源URL | [http://ir.ipe.ac.cn/handle/122111/13805] |
专题 | 过程工程研究所_研究所(批量导入) |
作者单位 | 1.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 |
推荐引用方式 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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