In situspace-confined growth of Co₃O₄nanoparticles inside N-doped hollow porous carbon nanospheres as bifunctional oxygen electrocatalysts for high-performance rechargeable zinc–air batteries

Abstract

Developing high-performance and low-cost bifunctional oxygen electrocatalysts for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is of great significance for accelerating the commercialization of rechargeable zinc-air batteries...

Advanced bifunctional catalyst design for rechargeable zinc–air batteries

“…Transition metal oxides (for example spinel, perovskite, and other structures) are widely reported as corrosion-resistant ORR/OER catalysts. 135–140 However, their applications are largely confined by the low electronic conductivity. Typically, MnO x has been studied as a bifunctional catalyst owing to its multiple valence, miscellaneous crystal structures, low cost and environmental friendliness.…”

Dual‐Confined Bead‐Like CoSe2@NC@NCNFs Bifunctional Catalyst Boosting Rechargeable Zinc‐Air Batteries†

“…The high specific surface area and hierarchical mesoporous structure of CoSe 2 @NC@ NCNFs can facilitate the exposure of active sites and efficient oxygen diffusion at the three‐phase interface during catalysis. [ 54 ] In Figure 2d, thermogravimetric (TG) analysis under O 2 atmosphere was conducted to evaluate the thermal stability and determine the content of Co and carbon in the CoSe 2 @NC@NCNFs. The initial weight loss stage (4.5%) primarily corresponds to desorption of adsorbed water on the catalyst surface, while the subsequent weight loss phase (46.8%) is partly attributed to the conversion of CoSe 2 to Co 3 O 4 and SeO 2 , and the other part is due to the carbon oxidation to CO 2 .…”