Thorough understanding of H-2 electrochemical oxidation helps optimize SOFC anode design and improve its performance. However, controversies still exist regarding H-2 electrochemical oxidation. Due to their well-defined 2-D structure, Ni/YSZ pattern anodes are ideally suited for reaction kinetic studies. In this study, a systematic study was performed to determine conditions for the stabilization of Ni/YSZ pattern anode performance. Moreover, a comprehensive and reliable dataset of H-2 electrochemical oxidation was obtained under stable test conditions. We found that stabilization of Ni/YSZ pattern anode performance relies on temperature and Ni thickness. Polarization resistance (R-p) depends on temperature, overpotential, H-2 partial pressure, and TPB length, and it increases with decreasing any of these parameters. R-p also depends on H2O content. When the pH(2)O is between 3000 Pa (3% of the total gases) and 30 000-40 000 Pa (30-40% of the total gases), R-p decreases with increasing H2O content. However, R-p is less affected with further increasing H2O content. Charge transfer reactions coupled with H2O-related processes contribute to the rate-limiting steps for H-2 electro-oxidation.