Wood-derived porous carbon supported ?-Fe2O3 nanoparticles as efficient catalyst for oxygen reduction reaction
Applied Surface Science(2022)
摘要
The sluggish kinetics of oxygen reduction reaction at the cathode is one of the obstacles of the next-generation energy conversion system such as fuel cell and Zn-air battery. Here, a simple pyrolysis method was used to transform delignification-treated balsa wood into nitrogen-doped porous layered carbon materials. gamma-Fe2O3 nanocrystals were supported on N-doped wood-derived carbon materials. The prepared Fe2O3-CW1000 catalyst exhibits superior ORR performance with a high onset potential of 0.98 V-RHE in alkaline environment. This is consistent with the potential of commercial Pt/C. The superior ORR activity is attributed to the fact that gamma-Fe2O3 nanoparticles promote the activity of Fe-Nx sites. And the N-enriched porous carbon matrix facilitates the faster electron movement on the catalyst surface and the full exposure of the active sites.
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关键词
Fe2O3, Oxygen reduction reaction, Biomass-derived carbon, Non-noble metal catalyst
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