Electrooxidation of 2‐Propanol on Mono‐ and Bi‐Metallic Noble Metal Nanoparticles in Alkaline Studied with Real‐Time Product and Dissolution Characterization

• DOI: 10.1002/celc.202400699
• Publication Date: 2025-03-18T12:38:30Z
• Authors: Iosif Mangoufis‐G...; Attila Kormányos; Mária Minichová; Andreas Körner; Birk Fritsch; Karl J. J. Mayrhofer; Serhiy Cherevko; Ioannis Katsounaros
• Keywords: Noble metal; Characterization; Propanol

Abstract The selective electrochemical oxidation of 2‐propanol to acetone can be used in fuel cells deliver low‐carbon electricity and efficiently utilize hydrogen that is stored liquid organic carrier molecules. Here we study the electrooxidation alkaline electrolyte, on various commercially available carbon‐supported mono‐ bi‐metallic noble metal nanoparticles. We use voltammetry compare activity different catalysts, combine a flow cell with real‐time analytics monitor products reaction dissolution atoms presence absence 2‐propanol. While if formed all our results show onset potential lowest for PtRu/C, Rh/C PdRh/C, but current latter reaches much higher value before surface passivated, suggesting PdRh/C would preferred an fed Online monitoring suggests anode should not exposed potentials above ca. +0.8 V during transient operation, i. e., startup/shutdown conditions, prevent palladium rhodium from catalyst surface.