碱性介质中氢氧化和析氢反应机理研究现状

李孟婷, 郑星群, 李莉, 魏子栋

Research Progress of Hydrogen Oxidation and Hydrogen Evolution Reaction Mechanism in Alkaline Media

Mengting Li, Xingqun Zheng, Li Li, Zidong Wei

表1 HOR/HER中各决速步的理论Tafel斜率、HOR/HER机理与对应Tafel斜率(298 K)

Table 1 The theoretical Tafel slope of the rate-determining step in HOR/HER, mechanism of HOR/HER and corresponding Tafel slope (298 K).

Rate-determining step (RDS) Tafel slope/(mV∙dec−1) (theoretical value) 21 Mechanism Tafel slope/(mV∙dec−1) 13 HER HOR HER HOR Tafel 30 30 Tafel(RDS)-Volmer 30 30 Volmer 120 120 Tafel-Volmer(RDS) 118 118 Heyrovsky 40 (θH > 0.6) 120 (θH > 0.6) Heyrovsky(RDS)-Volmer 39 118 120 (θH < 0.6) 40 (θH < 0.6) Heyrovsky-Volmer(RDS) 118 39