Boosting the Electrocatalytic Water Oxidation Performance of CoFe 2 O 4 Nanoparticles by Surface Defect Engineering

Spinel oxides have attracted widespread interest for electrocatalytic applications owing to their unique crystal structure and properties. The surface structure of spinel oxides significantly influences the electrocatalytic performance of spinel oxides. Herein, we report a Li reduction strategy that...

Full description

Saved in:
Bibliographic Details
Published in:ACS applied materials & interfaces 2019-01, Vol.11 (4), p.3978-3983
Main Authors: Ou, Gang, Wu, Fengchi, Huang, Kai, Hussain, Naveed, Zu, Di, Wei, Hehe, Ge, Binghui, Yao, Huizhen, Liu, Lai, Li, Henan, Shi, Yumeng, Wu, Hui
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Spinel oxides have attracted widespread interest for electrocatalytic applications owing to their unique crystal structure and properties. The surface structure of spinel oxides significantly influences the electrocatalytic performance of spinel oxides. Herein, we report a Li reduction strategy that can quickly tune the surface structure of CoFe O (CFO) nanoparticles and optimize its electrocatalytic oxygen evolution reaction (OER) performance. Results show that a large number of defective domains have been successfully introduced at the surface of CFO nanopowders after Li reduction treatment. The defective CFO nanoparticles demonstrate significantly improved electrocatalytic OER activity. The OER potential observed a negative shift from 1.605 to 1.513 V at 10 mA cm , whereas the Tafel slope is greatly decreased to 42.1 mV dec after 4 wt % Li reduction treatment. This efficient Li reduction strategy can also be applied to engineer the surface defect structure of other material systems and broaden their applications.
ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.8b19265