TY  - JOUR
AU  - Huang, Jun
AU  - Li, Chenkun
TI  - Impedance Response of Electrochemical Interfaces: Part II – Chemisorption
JO  - Journal of physics / Condensed matter
VL  - 33
SN  - 0953-8984
CY  - Bristol
PB  - IOP Publ.
M1  - FZJ-2021-01348
SP  - 164003 
PY  - 2021
AB  - Physical modelling helps to acquire fundamental insights from experimental data when electrochemical impedance spectroscopy is employed for mechanistic understandings of electrocatalytic reactions. Herein, we report an analytical solution for chemisorption impedance from a consistent treatment of ion transport in the solution and electron transfer on the surface. Our formulation avoids both a priori decoupling of double-layer charging and electron transfer reaction, and a strict separation of double-layer charging and ion transport. Ion transport in the entire solution region is described by the Poisson-Nernst-Planck theory and electron transfer kinetics on the electrode surface by the Frumkin-Butler-Volmer theory. Surface dipoles caused by partially charged chemisorbates are considered. The classical Frumkin-Melik-Gaikazyan model for chemisorption is retrieved as a limiting case. The obtained formula is validated using experimental data of hydrogen adsorption at Pt(111). Characteristic frequencies and asymptotic behaviors of chemisorption impedance are analyzed.
LB  - PUB:(DE-HGF)16
C6  - 33730712
UR  - <Go to ISI:>//WOS:000642192500001
DO  - DOI:10.1088/1361-648X/abef9d
UR  - https://juser.fz-juelich.de/record/891077
ER  -