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	Effect of Alkali Concentration, Oxygen Partial Pressure and Temperature on Oxygen Reduction Reaction on Pt Electrode in NaOH Solution
	Peng Zhong1,2,3; Yan Wen-Yi2; Wang Shao-Na2; Zheng Shi-Li2; Du Hao2; Zhang Yi2
刊名	ACTA PHYSICO-CHIMICA SINICA
	2014
卷号	30期号:1页码:67-74
关键词	Cyclic voltammetry Linear sweep voltammetry Oxygen reduction reaction Henry's constant Reactivity Solubility Diffusion coefficient
ISSN号	1000-6818
其他题名	Acta Phys.-Chim. Sin.
中文摘要	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.
英文摘要	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.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Chemistry, Physical
研究领域[WOS]	Chemistry
关键词[WOS]	ELECTROCHEMICAL REDUCTION ; DIFFUSION COEFFICIENT ; HYDROGEN-PEROXIDE ; FUEL-CELLS ; PLATINUM ; ELECTROCATALYSIS ; SOLUBILITY ; WATER ; KINETICS ; MEDIA
收录类别	SCI
原文出处	://WOS:000329345800009
语种	英语
WOS记录号	WOS:000329345800009
公开日期	2014-05-06
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/8079]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.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
推荐引用方式 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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