Issue 20, 2024

Oxygen vacancy assisted Ru–Ni(OH)2 for efficient ethylene glycol electrooxidation reaction

Abstract

Ethylene glycol oxidation (EGOR) is an important step in polyethylene terephthalate (PET) recycling, and it is a thermodynamically more favorable anode reaction in comparison with the oxygen evolution reaction (OER). A cross-network framework of Ru and S-doped nickel hydroxide with abundant oxygen vacancies (Ru,S–Ni(OH)2–OV) on nickel foam (NF) is synthesized by a corrosion method, which is used to produce formate by electrocatalysis of ethylene glycol. Benefiting from the introduction of the S element promoting the formation of oxygen vacancies, Ru,S–Ni(OH)2–OV has a strong OH* adsorption capacity when the EGOR occurs, which is demonstrated by the Bode phase diagram and hydroxyl adsorption capacitance (Cφ). With an operating potential of only 1.42 V, the electrode can drive a high current density of 500 mA cm−2. Ru,S–Ni(OH)2–OV also shows excellent selectivity for formate over a wide potential window. The assembled two electrodes for an anion exchange membrane electrolytic cell (AEMWE) can achieve a current density of 500 mA cm−2 at a voltage of only 1.74 V. This work provides new insights into the development of efficient EGOR electrocatalysts.

Graphical abstract: Oxygen vacancy assisted Ru–Ni(OH)2 for efficient ethylene glycol electrooxidation reaction

Supplementary files

Article information

Article type
Research Article
Submitted
02 Jun 2024
Accepted
15 Aug 2024
First published
02 Sep 2024

Inorg. Chem. Front., 2024,11, 6889-6897

Oxygen vacancy assisted Ru–Ni(OH)2 for efficient ethylene glycol electrooxidation reaction

Y. Li, X. Liu, K. Wang, J. Chi, H. Lin and L. Wang, Inorg. Chem. Front., 2024, 11, 6889 DOI: 10.1039/D4QI01372G

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