The j–pH diagram of interfacial reactions involving H+ and OH-  

作　　者：Fengjun Yin Hong Liu 

机构地区：[1]Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences,Chongqing 400714,China [2]Key Laboratory of Reservoir Aquatic Environment,Chinese Academy of Sciences,Chongqing 400714,China [3]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Journal of Energy Chemistry》2020年第11期339-343,共5页能源化学（英文版）

基　　金：the National Natural Science Foundation of China(51525805,51727812,51808526)。

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 relevance 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.

关 键 词：j–pH diagram Interfacial reaction pH gradient H^+and OH^-transports Electrode reaction 

分 类 号：O646.14[理学—物理化学]