Abstract
Cobalt oxide (CoO) nanosheets with a size of about 2.7 nm are prepared. The proper annealing temperatures (200 °C–400 °C) are used to control the conversion of CoO nanosheets to high-ratio hexagonal phases from high-ratio cubic phases at room temperature. The analysis revealed the hexagonal phase is preferable to cubic phase for oxygen evolution reaction of CoO nanosheets. The ultrafine CoO nanosheets with high-ratio hexagonal phases showed a particularly high mass activity of 5597Ag−1 at 1.615 V, 22.8 times higher than that of the noble metal Ru cluster electrocatalyst. Our study indicates an effective way to synthesize nanosheet catalysts with high mass activity.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
