Details

Autor(en) / Beteiligte

• Zhou, Qixing
• Hou, Shaoyi
• Cheng, Yuxuan
• Sun, Ruoxu
• Shen, Wenyang
• Tian, Run
• Yang, Jun
• Pang, Huan
• Xu, Lin
• Huang, Kai
• Tang, Yawen

Titel

Interfacial engineering Co and MnO within N,S co-doped carbon hierarchical branched superstructures toward high-efficiency electrocatalytic oxygen reduction for robust Zn-air batteries

Ist Teil von

• Applied catalysis. B, Environmental, 2021-10, Vol.295, p.120281, Article 120281

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The in-situ immobilization of Co/MnO hetero-nanoparticles onto N,S co-doped carbon nanotubes/nanofiber-integrated hierarchical branched superstructures demonstrates excellent oxygen reduction electrocatalytic activity, stability and performs robust cycling stability. [Display omitted] •The Co/MnO hetero-nanoparticles were immobilized onto carbon nanofibers.•The heterojunctions cause electronic redistribution and create more active sites.•The “branches”/“trunk”-structure could accelerate electrolyte and mass transport.•The Co/MnO@N,S-C NT/NFs-equipped Zn-air battery shows superior cycling stability. Electronic regulation via interfacial formation is identified as a versatile strategy to improve the electrocatalytic activity. Herein, we report a feasible electrospinning-pyrolysis approach for the in-situ immobilization of Co/MnO hetero-nanoparticles onto N,S co-doped carbon nanotubes/nanofiber-integrated hierarchical branched superstructures (abbreviated as Co/MnO@N,S-C NT/CNFs hereafter). The simultaneous realization of interfacial engineering and nanocarbon hybridization renders the fabricated Co/MnO@N,S-C NT/CNFs with abundant firmly anchored active sites, modified electronic configuration, improved electric conductivity, efficient mass transport pathways, and significantly reinforced stability. Profiting from the compositional synergy and architectural advantages, the Co/MnO@N,S-C NT/CNFs exhibit outstanding ORR activity, superior tolerance to methanol, and excellent long-term stability in KOH electrolyte. More encouragingly, as a proof-of-concept demonstration, the rechargeable aqueous and flexible all-solid-state Zn-air batteries using Co/MnO@N,S-C NT/NFs + RuO2 as the air-cathode afford higher power densities, larger specific capacities and superb cycling stability, outperforming the state-of-the-art Pt/C + RuO2 counterparts. This work demonstrates the great contribution of heterointerfaces for oxygen electrocatalysis.