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Insight into the Electrooxidation Mechanism of Ethylene Glycol on Palladium‐Based Nanocatalysts: In Situ FTIRS and LC‐MS Analysis

Da Silva, Rodrigo Garcia ; Rodrigues de Andrade, Adalgisa ; Servat, Karine ; Morais, Cláudia ; Napporn, Teko W. ; Kokoh, Kouakou B.

ChemElectroChem, 2020-11, Vol.7 (21), p.4326-4335 [Periódico revisado por pares]

Weinheim: John Wiley & Sons, Inc

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  • Título:
    Insight into the Electrooxidation Mechanism of Ethylene Glycol on Palladium‐Based Nanocatalysts: In Situ FTIRS and LC‐MS Analysis
  • Autor: Da Silva, Rodrigo Garcia ; Rodrigues de Andrade, Adalgisa ; Servat, Karine ; Morais, Cláudia ; Napporn, Teko W. ; Kokoh, Kouakou B.
  • Assuntos: Carbon ; Electrodes ; Electrolysis ; electrooxidation ; energy conversion ; Ethylene glycol ; Fourier transforms ; fuel cells ; heterogeneous catalysis ; High performance liquid chromatography ; Mass spectrometry ; Oxidation ; Palladium ; Ruthenium
  • É parte de: ChemElectroChem, 2020-11, Vol.7 (21), p.4326-4335
  • Descrição: The ethylene glycol oxidation reaction on nickel and ruthenium modified palladium nanocatalysts was investigated with electrochemical, spectroelectrochemical, and chromatographic methods. These carbon‐supported materials, prepared by a revisited polyol approach, exhibited high activity towards the ethylene glycol electrooxidation in alkaline medium. Electrolysis coupled with high performance liquid chromatography/mass spectrometry (HPLC‐MS) and in situ Fourier transform infrared spectroscopy (FTIRS) measurements allowed us to determine the different compounds electrogenerated in the oxidative conversion of this two‐carbon molecule. High value‐added products such as oxalate, glyoxylate, and glycolate were identified in all electrolytic solutions, whereas glyoxylate was selectively formed at the Ru45@Pd55/C electrode surface. In situ FTIRS results also showed a decrease in the pH value in the thin layer near the electrode as a consequence of OH− consumption during the spectroelectrochemical experiments. Value adding: Identification of the reaction products resulted from the ethylene glycol (EG) oxidation on Pd‐based electrode materials. When adding Ru as a co‐catalyst, an electronic effect shifts the fuel issued from biomass towards lower potentials, whereas a high Ni content provides Pd with a restructuring effect with a high oxidation peak. All of the obtained products keep the initial skeleton molecule, confirming that EG oxidation on Ru@Pd/C can lead to platform value‐added molecules parallelly to energy conversion.
  • Editor: Weinheim: John Wiley & Sons, Inc
  • Idioma: Inglês
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