2026-10-06T07:28:32Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33289713 2026-09-25T16:18:13Z category_25234 category_26803 category_25078 item_type_3 month_year_09_2026

<b>Corrosion Behavior of CeOx-Pd/C HOR Catalyst in Alkaline Electrolyte</b> Ramesh Kumar Singh (20362386) Eduardo B. Ferreira (24803953) Bryan J. Allen (24803957) Andres O. Godoy (24803977) Ana C. Alba-Rubio (24803997) Jasna Jankovic (6899759) Gregory Jerkiewicz (1659334) Dario R Dekel (20859466) Electrochemistry Nanomaterials Electroanalytical chemistry Corrosion, Pd/C and CeOx-Pd/C, aqueous alkaline electrolyte, potentiodynamic polarization <p dir="ltr">This contribution investigates the corrosion behavior (stability) of CeO_x-Pd/C and Pd/C catalysts in 0.10 M aqueous KOH solution saturated with reactive (H₂ or O₂) or neutral (N₂) gases using potentiodynamic polarization (PDP). These catalysts are characterized by advanced electron microscopy, and the results demonstrate a uniform distribution of Pd and CeO_x-Pd nanoparticles on the carbon support. For comparative analysis, the corrosion parameters, namely the corrosion current and corrosion potential, <i>I</i>_corr and <i>E</i>_corr, are determined in the presence of N₂(g) and O₂(g) for the CeO_x-Pd/C and Pd/C catalysts. An order of magnitude higher<i> I</i>_corr is obtained in the presence of O₂(g) as compared to N₂(g) in PDP anodic scans. Additionally, lower <i>I</i>_corr values are observed for the CeO_x-Pd/C catalysts in anodic scans in the presence of both N₂(diss) and O₂(diss) as compared to the monometallic Pd/C, thus further highlighting its stability as a promising alkaline hydrogen oxidation reaction catalyst. Determination of <i>I</i>_corr and <i>E</i>_corr in the presence of H₂(diss) is challenging due to the significantly high hydrogen oxidation current. Interestingly, cyclic voltammograms recorded before and after the PDP measurements in the three gaseous environments show that the CeO_x-Pd/C catalysts demonstrate better stability than Pd/C.</p> 2026-09-25T16:18:13Z Dataset Dataset 10.6084/m9.figshare.33289713.v1 https://figshare.com/articles/dataset/_b_Corrosion_Behavior_of_CeOx-Pd_C_HOR_Catalyst_in_Alkaline_Electrolyte_b_/33289713 CC BY 4.0