Journal
CHINESE JOURNAL OF CHEMICAL PHYSICS
Volume 31, Issue 4, Pages 517-522Publisher
CHINESE PHYSICAL SOC
DOI: 10.1063/1674-0068/31/cjcp1805127
Keywords
Electrocatalyst; OER; Oxygen vacancy; Co3O4
Categories
Funding
- National Natural Science Foundation of China [21621003, 21327806]
- National Key Research and Development Program of China [2016YFA0203101]
- Tsinghua University Initiative Scientific Research Program
Ask authors/readers for more resources
Electrochemical water splitting requires efficient water oxidation catalysts to accelerate the sluggish kinetics of water oxidation reaction. Here, we designed an efficient Co3O4 electrocatalyst using a pyrolysis strategy for oxygen evolution reaction (OER). Morphological characterization confirmed the ultra-thin structure of nanosheet. Further, the existence of oxygen vacancies was obviously evidenced by the X-ray photoelectron spectroscopy and electron spin resonance spectroscopy. The increased surface area of Co3O4 ensures more exposed sites, whereas generated oxygen vacancies on Co3O4 surface create more active defects. The two scenarios were beneficial for accelerating the OER across the interface between the anode and electrolyte. As expected, the optimized Co3O4 nanosheets can catalyze the OER efficiently with a low overpotential of 310 mV at current density of 10 mA/cm(2) and remarkable long-term stability in 1.0 mol/L KOH.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available