A detailed look into hydrogen electrochemical oxidation on ceria anodes

Journal article (2018)

Authors

A.N. Tabish Energy Technology - Mechanical, Maritime and Materials Engineering , University of Engineering and Technology Lahore
H.C. Patel Dutch Institute for Fundamental Energy Research
J. Schoonman ChemE/Materials for Energy Conversion and Storage - AS
P.V. Aravind Energy Technology - Mechanical, Maritime and Materials Engineering
Research Group
Energy Technology (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2018 A.N. Tabish, H.C. Patel, J. Schoonman, P.V. Aravind
DOI: https://doi.org/10.1016/j.electacta.2018.05.058
More Info
expand_more

Published Date

2018

Language

English

Faculty

Mechanical, Maritime and Materials Engineering

Department

Process and Energy

Research Group

Energy Technology

Abstract

Using the Nernst-Planck-Poisson model and a detailed reaction mechanism, we studied the hydrogen electrochemical oxidation on a ceria anode. Resistances caused by surface kinetics, and bulk transport of oxide-ion vacancies and electrons are computed individually to identify the dominant resistive process. The effect of operating conditions like temperature and gas-phase composition on the polarization resistance is evaluated and compared with the experimental data obtained by Electrochemical Impedance Spectroscopy (EIS). The rate-determining step is found to be the charge-transfer reaction in which hydrogen adsorbs at the surface oxide ions and forms hydroxyls along with the charge-transfer to adjacent cerium ions. Based on the rate-determining step, the exchange-current density is also calculated and validated with the experimental data.

Files

A_detailed_look_into_hydrogen_... (pdf)
(pdf | 3.49 Mb)
- Embargo expired in 07-07-2020
help_outline