Journal
CHEMCATCHEM
Volume 13, Issue 13, Pages 3112-3118Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.202002045
Keywords
Cd-organic complexes; hierarchically porous; nitrogen-doped porous carbon; oxygen reduction reaction
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Funding
- Fundamental Research Funds for the Central Universities [531118010232]
- Huxiang High-Level Talent Gathering Project of Hunan Province [2019RS1012]
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Nanostructured nitrogen-doped carbon materials with hierarchical porous structure and high specific surface area were synthesized using an ion-induced method, showing comparable oxygen reduction reaction performance and stability with commercial Pt/C. The resulting material exhibited good methanol tolerance and stability, leading to high performance in assembled Zn-air battery.
Nanostructured nitrogen-doped carbon materials are considered as an appealing material to replace precious-metal Pt-based catalysts in fuel cells due to a high oxygen reduction reaction (ORR) activity and outstanding stability. In the present work, we developed an ion-induced method for the fabrication of hierarchical porous nitrogen-doped carbon materials (HPNC) using Cd-organic complexes as sacrificial templates and precursors. During pyrolysis, a hierarchical porous structure with a high specific surface area was formed through the combination of a metal-free ion as structure-directing agent and the evaporation property of Cd. Benefiting from this unique structure, the resulting HPNC exhibited comparable ORR performance with commercial Pt/C, including positive onset potential of 0.96 V vs. RHE (reversible hydrogen electrode), positive half-wave potential of 0.86 V vs. RHE, good methanol tolerance and stability. On this basis, the assembled Zn-air battery showed high open circuit potential, power density and excellent stability.
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