Tensile Strain-Mediated Spinel Ferrites Enable Superior Oxygen Evolution Activity
Harbin Institute of Technology · University of Macau · +5 more institutions
Abstract
Exploring efficient strategies to overcome the performance constraints of oxygen evolution reaction (OER) electrocatalysts is vital for electrocatalytic applications such as H2O splitting, CO2 reduction, N2 reduction, etc. Herein, tunable, wide-range strain engineering of spinel oxides, such as NiFe2O4, is proposed to enhance the OER activity. The lattice strain is regulated by interfacial thermal mismatch during the bonding process between thermally expanding NiFe2O4 nanoparticles and the nonexpanding carbon fiber substrate. The tensile lattice strain causes energy bands to flatten near the Fermi level, lowering eg orbital occupancy, effectively increasing the number of electronic states near the Fermi level,…
Citation impact
- FWCI
- 15.36
- Percentile
- 100%
- References
- 58
Authors
10Topics & keywords
- Overpotential
- Spinel
- Chemistry
- Oxygen evolution
- Chemical engineering
- Fermi level
- Electrode
- Materials science
- Affordable and clean energy