Effect of Alkali Concentration, Oxygen Partial Pressure and Temperature on Oxygen Reduction Reaction on Pt Electrode in NaOH Solution
文献类型：期刊论文
| 作者 | Peng Zhong1,2,3; Yan Wen-Yi2; Wang Shao-Na2; Zheng Shi-Li2; Du Hao2; Zhang Yi2 |
| 刊名 | ACTA PHYSICO-CHIMICA SINICA
 |
| 出版日期 | 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 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000329345800009 |
| 公开日期 | 2014-05-06 |
| 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. |
入库方式： OAI收割
来源：过程工程研究所
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