Year: 2026
Type: preprint
Abstract: Ethylene glycol oxidation reaction (EGOR) offers a route to replace the anodic oxygen evolution reaction while converting ethylene glycol into value-added products. Here, electrodeposited CeO2−x//NF and Ni-modified CeO2−x/NF were evaluated for EGOR in alkaline electrolyte. Ni modification markedly enhanced the polarization response, enabling a current density of 100 mA cm-2 at 1.61 V vs RHE without iR compensation, approximately 97 mV lower than that of the parent CeO2−x/NF electrode at the same current density. During potentiostatic EGOR at 1.8 V vs RHE in 1 M KOH containing 1 M ethylene glycol, the parent and Ni-modified electrodes sustained average current densities of 192 and 241 mA cm-2, respectively. 1H-NMR analysis identified formate as the dominant detected liquid product, with estimated formate Faradaic efficiencies of 83.2% and 92.9%, respectively. These results show that Ni modification enhances EGOR activity while maintaining efficient formate formation on CeO2−x-based electrodes.
Source: ChemRxiv
Author: Shihui Chen
Institution: Rice University
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7223168266