Regulating electronic states of nitride/hydroxide to accelerate kinetics for oxygen evolution at large current density
Dalian University of Technology · Dalian University · +2 more institutions
Abstract
Abstract Rational design efficient transition metal-based electrocatalysts for oxygen evolution reaction (OER) is critical for water splitting. However, industrial water-alkali electrolysis requires large current densities at low overpotentials, always limited by intrinsic activity. Herein, we report hierarchical bimetal nitride/hydroxide (NiMoN/NiFe LDH) array as model catalyst, regulating the electronic states and tracking the relationship of structure-activity. As-activated NiMoN/NiFe LDH exhibits the industrially required current density of 1000 mA cm −2 at overpotential of 266 mV with 250 h stability for OER. Especially, in-situ electrochemical spectroscopic reveals that heterointerface facilitates…
Citation impact
- FWCI
- 29.57
- Percentile
- 100%
- References
- 63
Authors
7Topics & keywords
- Oxygen evolution
- Overpotential
- Water splitting
- Alkaline water electrolysis
- Materials science
- Electrolysis of water
- Hydroxide
- Dielectric spectroscopy
- Clean water and sanitation