Hydrogen Electrosorption in Pd‐Pt‐Rh Alloys in the Presence of Adsorbed CO

Abstract

Electrosorption of hydrogen in Pd‐Pt‐Rh alloys in the presence of adsorbed carbon monoxide has been examined using cyclic voltammetry (CV). CO adsorption has a remarkable influence on both hydrogen adsorption and absorption. Hydrogen adsorption is strongly inhibited by CO adsorption products. The processes of hydrogen absorption and desorption are not totally blocked but proceed much slower than in the absence of CO adsorbates. On electrodes covered with adsorbed CO oxidation of absorbed hydrogen is shifted to higher potentials.

^†Dedicated to the memory of Professor Harry B. Mark Jr.

Keywords:

• Noble metal alloys
• CO adsorption
• H absorption
• H adsorption
• Cyclic voltammetry

Acknowledgment

This work was financially supported by the Polish State Committee for Scientific Research (KBN).

Notes

^†Dedicated to the memory of Professor Harry B. Mark Jr.