Modulation of pore-size in N, S-codoped carbon/Co9S8 hybrid for a stronger O2 affinity toward rechargable zinc-air battery

Two-Dimensional Metal–Organic Framework Superstructures from Ice-Templated Self-Assembly

“…To quantify the ion transport in the structure, we performed electrochemical impedance spectroscopy (EIS) on the RDE. 64 Figure S42 shows the plot of Z′ against ω −1/2 . The diffusion coefficients of hydroxyl ions (D OH -; calculation details seen in Supporting Information) for TR-Z8-1-C and TR-Z8-2-C calculated based on the plot are 1.43 × 10 −10 and 1.22 × 10 −10 cm 2 s −1 , respectively.…”

“…Second, the ordered carbon superstructure has better macroscopic reactant diffusion than randomly stacked carbon NPs because the porous network between randomly stacked NPs contains a dead volume, and diffusion becomes increasingly difficult as the depth of the stacked NP film increases. To quantify the ion transport in the structure, we performed electrochemical impedance spectroscopy (EIS) on the RDE Figure S42 shows the plot of Z ′ against ω –1/2 .…”

Biomass-derived cobalt/carbon hierarchically structured composites for efficient oxygen electrocatalysis and zinc–air batteries

“…When compared with recently reported ORR/OER bifunctional electrocatalysts (the inset of Fig. 3f, Table S2 †), [34][35][36][37][38][39][40][41] Co@Co-N,S-C still remained advantageous with a smaller or similar ΔE, implying that the construction of electrocatalysts with a hierarchical structure integrated with Co nanoparticles and Co-N-C moieties is an effective strategy for the development of rechargeable zinc-air batteries. The electron transfer between the carbon shell and the Co core could allow the electrons of Co, N, S, and C to be redistributed, which activated the carbon shell near the Co core.…”

Recent advances of biomass derived carbon-based materials for efficient electrochemical energy devices

“…The co-doping of different heteroatoms has a synergistic effect, which can further enhance the charge transfer rate and optimize the electronic conguration. 137,138 Most works suggested that different heteroatomic co-doped carbon catalysts have higher electrocatalytic activity than single doped carbon. Borghei et al synthesized N,P co-doped porous carbon by using coconut shell as a carbon source, urea and phosphoric acid as N and P sources, respectively.…”