An FTIR study of the electrooxidation of C2 and C3 alcohols on carbon-supported PdxRhy in alkaline medium - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue ChemElectroChem Année : 2022

An FTIR study of the electrooxidation of C2 and C3 alcohols on carbon-supported PdxRhy in alkaline medium

Résumé

We have investigated the promoting effect of Rh addition to Pd-based materials in the electrooxidation of ethanol and glycerol. Physicochemical characterizations (XRD, EDX, TEM, and XPS) of the PdxRhy/C materials, prepared by Bromide Anion Exchange (BAE), showed that the experimental bimetallic compositions were close to the targeted ones. PdxRhy/C particle sizes ranged from 2.2 to 3.8 nm. The ethanol oxidation reaction (EOR) on the PdxRhy/C catalysts yielded four times larger carbonate (CO3 2-) amount. As for the glycerol oxidation reaction (GOR), the onset potential on the Pd50Rh50/C catalyst occurred at lower potentials. Chromatographic analysis combined with in situ Fourier transform infrared (FTIR) spectroscopy showed that GOR on the Pd50Rh50/C catalyst selectively and quantitatively produced glycerate and tartronate. The outstanding ability of the Pd50Rh50/C catalyst toward EOR and GOR was correlated to the electronic effect expressed by a negative potential shift (200 mV) and the 47% alloying degree in the Pd50Rh50/C structure.

Domaines

Chimie
Fichier principal
Vignette du fichier
Manuscript Thamyres-ChemElectroChem-april202-accepted version.pdf (658.43 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03875885 , version 1 (28-11-2022)

Identifiants

Citer

Thamyres Moreira, Adalgisa Andrade, K. Boniface Kokoh, Cláudia Morais, Teko Napporn, et al.. An FTIR study of the electrooxidation of C2 and C3 alcohols on carbon-supported PdxRhy in alkaline medium. ChemElectroChem, 2022, 9 (11), ⟨10.1002/celc.202200205⟩. ⟨hal-03875885⟩
16 Consultations
32 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More