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Effect of Alkali Concentration, Oxygen Partial Pressure and Temperature on Oxygen Reduction Reaction on Pt Electrode in NaOH Solution
Alternative TitleActa Phys.-Chim. Sin.
Peng Zhong1,2,3; Yan Wen-Yi2; Wang Shao-Na2; Zheng Shi-Li2; Du Hao2; Zhang Yi2
2014
Source PublicationACTA PHYSICO-CHIMICA SINICA
ISSN1000-6818
Volume30Issue:1Pages:67-74
AbstractIn this study, the influences of alkali concentration, oxygen partial pressure, and temperature on the oxygen reduction reaction (ORR) were examined in detail, using a specially designed electrochemical cell, by cyclic voltammetry (CV) and linear sweep voltammetry (LSV) in NaOH solutions. It was found that the ORR pathway is dependent on the solution alkalinity, and is transformed from a two-electron reduction by forming HO2- in dilute solutions to a one-electron reduction by forming stable O-2(-) in concentrated solutions. The process was significantly suppressed by decreases in the oxygen solubility and increases in the media viscosity. The oxygen pressure had a significant influence on the ORR, substantially promoting the ORR in alkaline solutions as a result of the greatly increased solubility of oxygen in the solutions. We obtained the Henry's constants of oxygen in NaOH solutions with different concentrations. The temperature had a clear dual effect on the ORR, as shown by the existence of an optimal temperature for the ORR in a given alkaline solution. These observations are discussed in terms of the oxygen reaction activity, oxygen solubility, and diffusion coefficient.; In this study, the influences of alkali concentration, oxygen partial pressure, and temperature on the oxygen reduction reaction (ORR) were examined in detail, using a specially designed electrochemical cell, by cyclic voltammetry (CV) and linear sweep voltammetry (LSV) in NaOH solutions. It was found that the ORR pathway is dependent on the solution alkalinity, and is transformed from a two-electron reduction by forming HO2- in dilute solutions to a one-electron reduction by forming stable O-2(-) in concentrated solutions. The process was significantly suppressed by decreases in the oxygen solubility and increases in the media viscosity. The oxygen pressure had a significant influence on the ORR, substantially promoting the ORR in alkaline solutions as a result of the greatly increased solubility of oxygen in the solutions. We obtained the Henry's constants of oxygen in NaOH solutions with different concentrations. The temperature had a clear dual effect on the ORR, as shown by the existence of an optimal temperature for the ORR in a given alkaline solution. These observations are discussed in terms of the oxygen reaction activity, oxygen solubility, and diffusion coefficient.
KeywordCyclic Voltammetry Linear Sweep Voltammetry Oxygen Reduction Reaction Henry's Constant Reactivity Solubility Diffusion Coefficient
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.3866/PKU.WHXB201311143
URL查看原文
Indexed BySCI
Language英语
WOS KeywordELECTROCHEMICAL REDUCTION ; DIFFUSION COEFFICIENT ; HYDROGEN-PEROXIDE ; FUEL-CELLS ; PLATINUM ; ELECTROCATALYSIS ; SOLUBILITY ; WATER ; KINETICS ; MEDIA
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000329345800009
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/8079
Collection研究所(批量导入)
Affiliation1.Tianjin Univ, Sch Chem Engn, Tianjin 300072, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
3.Natl Engn Res Ctr Distillat Technol, Tianjin 300072, Peoples R China
Recommended Citation
GB/T 7714
Peng Zhong,Yan Wen-Yi,Wang Shao-Na,et al. Effect of Alkali Concentration, Oxygen Partial Pressure and Temperature on Oxygen Reduction Reaction on Pt Electrode in NaOH Solution[J]. ACTA PHYSICO-CHIMICA SINICA,2014,30(1):67-74.
APA Peng Zhong,Yan Wen-Yi,Wang Shao-Na,Zheng Shi-Li,Du Hao,&Zhang Yi.(2014).Effect of Alkali Concentration, Oxygen Partial Pressure and Temperature on Oxygen Reduction Reaction on Pt Electrode in NaOH Solution.ACTA PHYSICO-CHIMICA SINICA,30(1),67-74.
MLA Peng Zhong,et al."Effect of Alkali Concentration, Oxygen Partial Pressure and Temperature on Oxygen Reduction Reaction on Pt Electrode in NaOH Solution".ACTA PHYSICO-CHIMICA SINICA 30.1(2014):67-74.
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