Internet Archive Scholar

Effect of Alkali Concentration, Oxygen Partial Pressure and Temperature on Oxygen Reduction Reaction on Pt Electrode in NaOH Solution

PENG Zhong, 1 天津大学化工学院, 天津 300072;,1 School of Chemical Engineering, Tianjin University, Tianjin 300072, P. R. China;, YAN Wen-Yi, WANG Shao-Na, ZHENG Shi-Li, DU Hao, ZHANG Yi, 2 中国科学院过程工程研究所, 湿法冶金清洁生产技术国家工程实验室, 北京 100190;,2 National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China;, 3 精馏技术国家工程研究中心, 天津 300072,3 National Engineering Research Center of Distillation Technology, Tianjin 300072, P. R. China
2014 Wuli huaxue xuebao  

Preserved Fulltext

fulltext thumbnail
Web Archive Capture PDF (906.8 kB)
https://web.archive.org/web/20220225140406/http://www.whxb.pku.edu.cn/CN/article/downloadArticleFile.do?attachType=PDF&id=28627

A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2022; you can also visit the original URL. The file type is application/pdf.

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 O2
more » ... 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
doi:10.3866/pku.whxb201311143 fatcat:n3n7ykhx5vfqxjd42y5rfp4bm4
Citation

PENG Zhong, 1 天津大学化工学院, 天津 300072;,1 School of Chemical Engineering, Tianjin University, Tianjin 300072, P. R. China;, YAN Wen-Yi, WANG Shao-Na, ZHENG Shi-Li, DU Hao, ZHANG Yi, 2 中国科学院过程工程研究所, 湿法冶金清洁生产技术国家工程实验室, 北京 100190;,2 National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China;, 3 精馏技术国家工程研究中心, 天津 300072,3 National Engineering Research Center of Distillation Technology, Tianjin 300072, P. R. China. "Effect of Alkali Concentration, Oxygen Partial Pressure and Temperature on Oxygen Reduction Reaction on Pt Electrode in NaOH Solution." Wuli huaxue xuebao 30.1 (2014) 67-74