Electrooxidation of ethylene glycol on a carbon-supported Pt catalyst at elevated temperatures and pressure: A high-temperature/high-pressure DEMS study

PtIr–WO3 nanostructured alloy for electrocatalytic oxidation of ethylene glycol and ethanol

“…Based on the Arrhenius equation, the activation energy (45 and 49 kJ mol −1 , respectively) can be determined from the slope calculated by linear regression by plotting ln( j ) as a function of reciprocal of temperature (figure not shown). The value of activation energy is in good agreement with a previous report on alcohol electrooxidation [ 61 ]. This observation suggests that the increase of temperature causes more facile oxidation kinetics and decreases poisoning by the intermediate species.…”

Adsorption and electrooxidation of ethylene glycol and its C2 oxidation products on a carbon-supported Pt catalyst: A quantitative DEMS study

“…Considering the results of the present work and of previous studies, operation at elevated temperatures appears to be the most important factor for improving the activity and possibly also the selectivity for complete oxidation to CO 2 (CO 2 current efficiency) in a DAFC. The influence of the temperature on EG oxidation is currently investigated [62].…”

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

“…Platinum and gold-based catalysts have long been used in the first approach, leading to CÀ C bond cleavage products and particularly CO 2 . [3][4][5][6][7][8][9][10][11][12][13][14][15][16] In acid media, Xin et al [17] have observed that for EG oxidation, Pt catalysts exhibited higher catalytic activity than Au. Indeed, in these electrolytes, CO or CO-like intermediates were strongly adsorbed on the active sites of the Pt electrode, resulting in catalyst poisoning; while Au was nearly inactive due to its weak adsorption capability.…”

“…Indeed, and as proposed by Behm et al, [12,13 16,20] if the EG reaction may proceed via a sequential oxidation of the functional groups without attacking the CÀ C bond, a cogeneration approach can be explored on a transition metal modified PGM catalyst; the role of the latter co-catalyst will be to prevent strong adsorption of intermediate reaction molecules considered as toxic for the PGM catalyst surface. [13] For this purpose, the present investigation was conducted by preparing nickel or ruthenium modified palladium catalysts to oxidize EG in alkaline medium. Analytical methods (HPLC) coupled with spectrometric (LC/MS) and spectroscopic (FTIRS) techniques were the helpful to identify the main reaction products giving evidence of the selectivity of this oxidation of the EG into oxalate, glyoxylate, and glycolate.…”

“…While total oxidation of this diol to CO 2 (or carbonate) involves ten electrons, another route could exchange fewer electrons, but keep intact the skeleton of the molecule in order to supply energy to low‐power devices and at the same time recover platform molecules. Platinum and gold‐based catalysts have long been used in the first approach, leading to C−C bond cleavage products and particularly CO 2 [3–16] . In acid media, Xin et al [17] .…”