Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 647, Issue -, Pages 1-11Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2023.05.111
Keywords
Iron carbide; Doped carbon nanotubes; Lignin; Oxygen reduction reaction; Rechargeable zinc-air battery
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High-quality carbon-derived oxygen reduction reaction (ORR) catalysts, Fe5C2/Mn, N, S-CNTs, were prepared from biomass through one-step pyrolysis, exhibiting excellent ORR characteristics and cost advantage in Zn-air battery, offering valuable insights for low-cost and environmentally sustainable ORR catalysts and reusing biomass wastes.
Design of efficient and durable oxygen reduction reaction (ORR) electrocatalysts still remains challenge in sustainable energy storage and conversion devices. To achieve sustainable development, it is of importance to prepare high-quality carbon-derived ORR catalysts from biomass. Herein, Fe5C2 nanoparticles (NPs) were facilely entrapped in Mn, N, S-codoped carbon nanotubes (Fe5C2/Mn, N, S-CNTs) by a one-step pyrolysis of the mixed lignin, metal precursors and dicyandiamide. The resulting Fe5C2/Mn, N, S-CNTs had open and tubular structures, which exhibited positive shifts in the onset potential (Eonset = 1.04 V) and high half-wave potential (E1/2 = 0.85 V), showing excellent ORR characteristics. Further, the typical catalyst-assembled Zn-air battery showed a high power density (153.19 mW cm-2) and good cycling performance as well as obvious cost advantage. The research provides some valuable insights for rational construction of low-cost and environmentally sustainable ORR catalysts in clean energy field, coupled by offering some valuable insights for reusing biomass wastes.
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