. 2022 Apr 5;94(15):5901–5908. doi: 10.1021/acs.analchem.2c00110

Table 2. Parameters Used for Calculation of the Formal Potential of the H⁺/H₂ Redox Couple and for Simulation.

parameter	explanation	value
E_H⁺/H₂⁰ vs SCE	standard potential of H⁺/H₂ vs saturated calomel electrode	–0.241 V,³⁰
D_{CH₃COOH^–}	diffusion coefficient of acetic acid	1.29 × 10^–9 m² s^–1,¹¹
D_CH₃COO^–	diffusion coefficient of acetate	1.089 × 10^–9 m² s^–1,¹¹
D_H⁺	diffusion coefficient of hydrogen ion	9.311 × 10^–9 m² s^–1,¹¹
D_H₂	diffusion coefficient of hydrogen	5.11 × 10^–9 m² s^–1,¹¹
γ_H⁺	activity coefficient of hydrogen ion	0.754,³¹
K_H₂	Henry’s law constant of hydrogen	1292 bar M^–1,³²
c_KNO₃	concentration of KNO₃ electrolyte in experiment	0.1 M
k_KNO₃	salt parameter of KNO₃	0.07 M^–1,³³

Table 2. Parameters Used for Calculation of the Formal Potential of the H+/H2 Redox Couple and for Simulation.