Electrochemical Oxidation of Carbon Monoxide on Unsupported Gold Nanospheres in Alkaline Medium
Résumé
Carbon monoxide (CO) is intensively studied as a model molecule for organics oxidation reaction or as a strong adsorbate on noble metal surfaces. In this work, quasi-spherical gold nanoparticles (AuNPs) prepared by a revisited Turkevich method were electrochemically characterized. Physical and electrochemical measurements demonstrated the presence of (111) and (110) facets. These unsupported NPs were used to study the effect of the upper potential limit and gold oxide formation on CO oxidation in alkaline medium. The results demonstrate that hydroxide species are crucial to oxidize CO, whereas the gold oxides species do not play a critical role.
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