Reinforcing CoO Covalency via Ce(4f)─O(2p)─Co(3d) Gradient Orbital Coupling for High‐Efficiency Oxygen Evolution
Nanjing Normal University · Southeast University · +4 more institutions
Abstract
Abstract Rare‐earth (RE)‐based transition metal oxides (TMO) are emerging as a frontier toward the oxygen evolution reaction (OER), yet the knowledge regarding their electrocatalytic mechanism and active sites is very limited. In this work, atomically dispersed Ce on CoO is successfully designed and synthesized by an effective plasma (P)‐assisted strategy as a model (P‐Ce SAs@CoO) to investigate the origin of OER performance in RE–TMO systems. The P‐Ce SAs@CoO exhibits favorable performance with an overpotential of only 261 mV at 10 mA cm −2 and robust electrochemical stability, superior to individual CoO. X‐ray absorption spectroscopy and in situ electrochemical Raman spectroscopy reveal that the Ce‐induced…
Citation impact
- FWCI
- 22.11
- Percentile
- 100%
- References
- 60
Authors
10Topics & keywords
- Overpotential
- Materials science
- Oxygen evolution
- Transition metal
- Electrochemistry
- Catalysis
- Chemical physics
- Physical chemistry