KMS Chongqing Institute of Green and Intelligent Technology, CAS
| The j-pH diagram of interfacial reactions involving H+ and OH- | |
Yin, Fengjun1,2,3 ; Liu, Hong1,2
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| 2020-11-01 | |
| 摘要 | For aqueous interfacial reactions involving H+ and OH-, the interfacial pH varies dynamically during the reaction process, which is a key factor determining the reaction performance. Herein, the kinetic rele-vance between the interfacial pH and reaction rate is deciphered owing to the success in establishing the transport equations of H+/OH- in unbuffered solutions, and is charted as a current (j)-pH diagram in the form of an electrochemical response. The as-described j-pH interplay is experimentally verified by the oxygen reduction and hydrogen evolution reactions. This diagram serves to form a panoramic graphic view of pH function working on the interfacial reactions in conjunction with the Pourbaix's potential-pH diagram, and particularly enables a kinetic understanding of the transport effect of H+ and OH- on the reaction rate and valuable instruction toward associated pH control and buffering manipulation. (C) 2020 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved. |
| 关键词 | j-pH diagram Interfacial reaction pH gradient H+ and OH- transports Electrode reaction |
| DOI | 10.1016/j.jechem.2020.03.078 |
| 发表期刊 | JOURNAL OF ENERGY CHEMISTRY
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| ISSN | 2095-4956 |
| 卷号 | 50页码:339-343 |
| 通讯作者 | Liu, Hong(liuhong@cigit.ac.cn) |
| 收录类别 | SCI |
| WOS记录号 | WOS:000570592100009 |
| 语种 | 英语 |
