Defect engineering of mesoporous nickel ferrite and its application for highly enhanced water oxidation catalysis
- Univ. of Science and Technology of China, Hefei (China). CAS Key Lab. of Materials for Energy Conversion, Dept. of Materials Science and Engineering, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division
- Univ. of Science and Technology of China, Hefei (China). Hefei National Lab. for Physical Sciences at the Microscale
- Univ. of Science and Technology of China, Hefei (China). CAS Key Lab. of Materials for Energy Conversion, Dept. of Materials Science and Engineering, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); Univ. of Science and Technology of China, Hefei (China). Hefei National Lab. for Physical Sciences at the Microscale
Spinel nickel ferrite (NiFe2O4) emerges as a promising low-cost catalyst for water splitting but it usually shows low catalytic activity because of its limited number of active sites and poor conductivity. For the first time, herein we have successfully overcome its weaknesses using defect engineering approach by creating oxygen vacancies in NiFe2O4. The existence of oxygen vacancy not only shifts up the d-band center, strengthens the adsorption of H2O, and thus provides more active catalytic sites, but also tunes the electron configuration and creates massive number of defective donor states in the band gap to facilitate charge transfer processes. The optimal defective catalyst showed significantly enhanced catalytic OER performance with an OER overpotential as low as 0.35 V at 10 mA cm-2 and a Tafel slope of only ~40 mV dec-1. Moreover, the impressive specific mass and area current density of 17.5 A g-1 and 0.106 A m-2 at 1.58 V vs. Finally, RHE have been achieved, which are ~23 and ~36 times higher than that of defect-free counterpart, respectively.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); National Natural Science Foundation of China (NSFC)
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1426188
- Alternate ID(s):
- OSTI ID: 1566231
- Journal Information:
- Journal of Catalysis, Vol. 358, Issue C; ISSN 0021-9517
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Nickel‐Based Transition Metal Nitride Electrocatalysts for the Oxygen Evolution Reaction
|
journal | August 2019 |
Crystal phase induced band gap energy enhancing the photo-catalytic properties of Zn–Fe 2 O 4 /Au NPs: experimental and theoretical studies
|
journal | January 2019 |
Laser‐Assisted Doping and Architecture Engineering of Fe 3 O 4 Nanoparticles for Highly Enhanced Oxygen Evolution Reaction
|
journal | July 2019 |
Mesoporous Nanocast Electrocatalysts for Oxygen Reduction and Oxygen Evolution Reactions
|
journal | August 2019 |
Similar Records
NiFe Nanoparticle Nest Supported on Graphene as Electrocatalyst for Highly Efficient Oxygen Evolution Reaction
Single-Crystalline Ultrathin Co3O4 Nanosheets with Massive Vacancy Defects for Enhanced Electrocatalysis