Journal
ELECTROCHIMICA ACTA
Volume 247, Issue -, Pages 1044-1051Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2017.07.099
Keywords
Dehalogenation; interfacial reaction; carbon network; Zn-air battery
Categories
Funding
- Natural Science Foundation of China (NSFC)
- PetroChina Innovation Foundation
- Beijing Natural Science Foundation [2172042]
- Beijing Engineering Center for Hierarchical Catalysts
- 973 program [2014CB932104]
- National Key Research and Development Project [2016YFF0204402]
- Program for Changjiang Scholars and Innovative Research Team in the University
- Fundamental Research Funds for the Central Universities
- Ministry of Finance of PRC
- Ministry of Education of PRC
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Promoting oxygen reduction and evolution reactions using effective catalysts hold broad significance for clean energy utilization. In this work, hollow N-doped carbon networks (N-CNs) were fabricated via interfacial dehalogenation of polyvinyl dichloride (PVDC) on 2D CoAl-layered double hydroxide (LDH) with the presence of N source and used as efficient bifunctional catalysts. BET results revealed that as-made N-CNs had very large specific surface area (SSA, 550.4 m(2) g (1) for 900 degrees C-annealed N-CN (N-CN9)) and abundant pore hierarchy. Additionally, interconnected graphitic carbon walls, forming separated cells, can ensure high electrical conductivity, which were formed after acid-leaching of metallic components. Remarkably, N-CN9 showed excellent bifunctional activities towards oxygen reduction and evolution reactions. Moreover, N-CN9 assembled Zn-air battery (ZAB) exhibited an operating voltage of 1.35 V under applied current density of 1.0 mA cm (2), which is highly comparable to that of PtRu/C catalyst. Moreover, due to the pore hierarchy and large SSA, N-CN9-ZAB possessed much better rate capability and cycling stability than that of PtRu/C-ZAB. (C) 2017 Published by Elsevier Ltd.
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