Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 5, Issue 9, Pages 4507-4512Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta09604b
Keywords
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Funding
- National Natural Science Foundation of China [91334203, 21376074, 21507030]
- Ministry of Education of China [B08021]
- Fundamental Research Funds for the Central Universities
- Fund of Chinese Post-doctoral Community [200-5R-1507]
- Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences, US Department of Energy
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Developing new techniques for the synthesis of N-doped carbon nanotubes (N-CNTs) with high porosities and abundant N-doped active sites is significant for energy conversion and utilization. We report herein a novel non-CVD methodology that exploits a conjugated-nanoporous-polymer-driven, self-templated route toward a new family of highly N-doped carbon nanotubes. The utilization of a task-specific tubular nanoporous polycarbazole as a template maintains both high porosity and density of N-doped active sites, while simultaneously affording a hollow nanotube-like morphology of the final N-doped carbons. Attributed to these unique functionalities, the resultant N-CNT-based electrocatalyst exhibits a superior oxygen reduction reaction (ORR) activity with a half-wave potential of 0.88 V (vs. the reversible hydrogen electrode), higher long-term stability, and better methanol tolerance than commercial 20% Pt/C in alkaline media. More importantly, the ORR performance in an acidic medium exceeds that of the most previously reported non-precious carbonaceous catalysts. These findings could provide an alternative approach towards highly efficient non-precious N-CNT-based electrocatalysts for the ORR.
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