Premium
Insight into the Electrooxidation Mechanism of Ethylene Glycol on Palladium‐Based Nanocatalysts: In Situ FTIRS and LC‐MS Analysis
Author(s) -
Da Silva Rodrigo Garcia,
Rodrigues de Andrade Adalgisa,
Servat Karine,
Morais Cláudia,
Napporn Teko W.,
Kokoh Kouakou B.
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202001019
Subject(s) - ethylene glycol , chemistry , nanomaterial based catalyst , cyclic voltammetry , palladium , electrochemistry , inorganic chemistry , electrolysis , electrode , electrolyte , organic chemistry , metal , catalysis
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 Ru 45 @Pd 55 /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.