Journal
CARBON
Volume 146, Issue -, Pages 248-256Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2019.02.006
Keywords
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Funding
- Natural Science Foundation of China [51420105002, 21601137, 21601187, 51602226]
- Natural Science Foundation of Zhejiang Province [LQ16B010003]
- Fujian Province [2016J05055]
- Laboratory Open Project of Wenzhou University [18SK57]
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The search on low-cost, ultra-stable, and high-performance non-novel metal replacements to the Ptbased catalysts for oxygen reduction reaction (ORR) is of great urgency. Herein, a bottom-up method has been proposed to synthesize unique hollow N-doped carbon spheres (HNCSs) from an initial amorphous coordination polymer (CP) template-assisted route for the first time. HNCSs exhibit competitively comparable high electrocatalytic ORR activity, excellent reaction selectivity, and stronger long-term stability and negligible methanol crossover effect compared to the commercial Pt/C under the alkaline medium. Together with the other two reported carbonaceous ORR catalysts, including SCSs and NGPCs, our HNCSs possess the lowest Tafel slope of 65.7 mV dec(-1) which is close to Pt/C (62.6 mV dec(-1)), and show much enhanced ORR activity (J(L) = 5.34 mA cm(-2)) and stability (Retention = 96.5%, Time = 10 h). This CP-templated route for hollow carbon materials will shed light on a new synthetic strategy to prepare high-performance carbon-based and/or metal-free ORR catalysts. (c) 2019 Elsevier Ltd. All rights reserved.
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