Enhancing Glycerol Oxidation by Electrodeposited Reductive Ni2Co-LDHs with Enlarged Interlayer Space

• Published in: Industrial & engineering chemistry research Vol. 64; no. 24; pp. 11762 - 11770
• Main Authors: Chen, Wenjing, Yang, Wusi, Gao, Ying, Yuan, Yupeng, Sun, Yingqiang
• Format: Journal Article
• Language: English
• Published: American Chemical Society 18.06.2025
• Subjects: Kinetics, Catalysis, and Reaction Engineering
• ISSN: 0888-5885; 1520-5045
• DOI: 10.1021/acs.iecr.5c00673

Sluggish kinetics of the electrocatalytic glycerol oxidation reaction (GOR) hinders its development. Accordingly, we electrodeposit Ni2Co-LDHs ultrafast on nickel foam (E-Ni2Co-LDHs/NF) to both improve the Ni2+ ratio and enlarge interlayer space for enhancing electrochemical GOR. Results indicate that E-Ni2Co-LDHs/NF with a Ni2+/Ni3+ ratio of 1.309 and interlayer space of 16.2 Å is successfully synthesized. E-Ni2Co-LDHs/NF-catalyzed GOR can achieve 10 mA cm–2 at 1.24 V vs RHE owing to more active sites provided. Further analysis indicates that more Ni2+ is favorable to NiOOH formation and that the enlarged interlayer space facilitates the subsequent transfer of NiOOH, thereby promoting the GOR process. E-Ni2Co-LDHs/NF finally reduces working potential of 1.54 V to reach the current density of 10 mA cm–2 in a H-type cell, compared to overall water splitting (1.75 V@10 mA cm–2). This work reports a new strategy to enhance GOR by promoting the formation and subsequent transfer of NiOOH, thereby offering a promising approach for H2 production.