N,S-Doped hollow carbon nanosheet-encapsulated Co₉S₈ nanoparticles as a highly efficient bifunctional electrocatalyst for rechargeable zinc–air batteries

Abstract

The development of non-noble metal-based oxygen reduction/evolution reaction (ORR/OER) bifunctional electrocatalyst with reasonably designed structure and inexpensive component is of practical significance for commercialization of rechargeable zinc-air batteries. Here, we...

Hollow Co/N-C@NiCo2O4 Spheres as Highly Efficient Bifunctional Oxygen Electrocatalysts for Rechargeable Zinc–Air Batteries

“…The low I D / I G value of 1.05 for Co/N-C@NiCo 2 O 4 -600 indicates its high graphitization degree. The high I D / I G value of 1.39 for Co/N-C@NiCo 2 O 4 -500 suggests lots of defects, which may improve electron transfer, thereby promoting the electrocatalytic reaction . To further determine the specific surface area, nitrogen adsorption–desorption isothermal analysis was employed.…”

“…The high I D /I G value of 1.39 for Co/N-C@NiCo 2 O 4 -500 suggests lots of defects, which may improve electron transfer, thereby promoting the electrocatalytic reaction. 42 To further determine the specific surface area, nitrogen adsorption−desorption isothermal analysis was employed. As is shown in Figure 2d, Co/N-C@NiCo 2 O 4 -500 has the largest specific surface area of The high specific surface area can promote electrolyte penetration, accelerate electron transfer, and provide more active sites for catalytic reactions.…”

Carbon-based composites for rechargeable zinc-air batteries: A mini review

“…electrode should be taken into account when designing the structural elements of ORR and OER electrocatalysts (Chang et al, 2021;Peng et al, 2022). As shown in Figure 2, the most recent advancements in carbon-based bifunctional catalysts are briefly covered in this Review from the perspective of carbonbased metal composites, carbon-based metal oxide composites, and other carbon-based composites.…”

“…Additionally, OER and ORR typically involve electron transport and gas/liquid diffusion. Accordingly, the electrolyte/oxygen mass transfer and the electrical conduction between the active site and the electrode should be taken into account when designing the structural elements of ORR and OER electrocatalysts ( Chang et al, 2021 ; Peng et al, 2022 ). As shown in Figure 2 , the most recent advancements in carbon-based bifunctional catalysts are briefly covered in this Review from the perspective of carbon-based metal composites, carbon-based metal oxide composites, and other carbon-based composites.…”

Silicon nanocages as effective catalysts for oxygen reduction reaction

“…The metal adoption of surfaces of carbon based nanocatalysts and utilization of other derivatives of carbon based nanocatalysts are possible model to improve the catalytic activity for ORR [7][8][9]. In recent years, discovering of possible mechanisms from thermodynamic and kinetic viewpoints for ORR in fuel cells through carbon based nanocatalysts have attracted attentions [10][11][12].…”