Tafel Slope Plot as a Tool to Analyze Electrocatalytic Reactions

Kinetic and nonkinetic contributions to the Tafel slope value can be separated using a Tafel slope plot, where a constant Tafel slope region indicates kinetic meaningfulness. Here, we compare the Tafel slope values obtained from linear sweep voltammetry to the values obtained from chronoamperometry and impedance spectroscopy, and we apply the Tafel slope plot to various electrocatalytic reactions. We show that similar Tafel slope values are observed from the different techniques under high-mass-transport conditions for the oxygen evolution reaction on NiFeOOH in 0.2 M KOH. However, for the alkaline hydrogen evolution reaction and the CO2 reduction reaction, no horizontal Tafel slope regions were observed. In…

• NR
  National Research Foundation
• NO
  Nederlandse Organisatie voor Wetenschappelijk Onderzoek

  Award: 17621
• NR
  National Research Foundation of Korea

  Award: 2021R1A6A3A14039678
• TS
  Tata Steel
• MI
  Materials innovation institute

  Award: ENPPS.IPP.019.002
• TS
  Tata Steel Nederland
• HE
  H2020 European Research Council

  Award: 101019998