Investigation of H2, CO and Syngas Electrochemical Performance Using Ni/YSZ Pattern Anodes

Abstract

In this work, Ni/YSZ pattern anodes with well-defined 2-D structure were employed to investigate the electrochemical oxidation of H2, CO and syngas. Electrochemical tests revealed that polarization resistance (Rp) depended on applied overpotenital and gas compositions. In H2/H2O environment, Rp decreases when increasing overpotential, H2 and H2O partial pressure. In CO/CO2 environment, Rp experiences a minimum value when increasing the overpotential from 0 to 0.3 V, and the minimum Rp appears when the overpotential is 0.1 V. Rp decreases with an increase in partial pressure of CO2, but increases when increasing partial pressure of CO. Charge transfer reactions contribute to the main electrode process in both H2/H2O and CO/CO2 environments.