ZIF‐8 Derived Graphene‐Based Nitrogen‐Doped Porous Carbon Sheets as Highly Efficient and Durable Oxygen Reduction Electrocatalysts |
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| Authors: | Hai‐xia Zhong Jun Wang Yu‐wei Zhang Wei‐lin Xu Prof Wei Xing Dan Xu Prof?Dr Yue‐fei Zhang Prof?Dr Xin‐bo Zhang |
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| Institution: | 1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 (P. R. China) energy.ciac.jl.cn;2. University of Chinese Academy of Sciences, Beijing, 100049 (China);3. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, 130022 (China);4. Beijing University of Technology, Beijing, 100124 (P. R. China) |
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| Abstract: | Nitrogen‐doped carbon (NC) materials have been proposed as next‐generation oxygen reduction reaction (ORR) catalysts to significantly improve scalability and reduce costs, but these alternatives usually exhibit low activity and/or gradual deactivation during use. Here, we develop new 2D sandwich‐like zeolitic imidazolate framework (ZIF) derived graphene‐based nitrogen‐doped porous carbon sheets (GNPCSs) obtained by in situ growing ZIF on graphene oxide (GO). Compared to commercial Pt/C catalyst, the GNPCSs show comparable onset potential, higher current density, and especially an excellent tolerance to methanol and superior durability in the ORR. Those properties might be attributed to a synergistic effect between NC and graphene with regard to structure and composition. Furthermore, higher open‐circuit voltage and power density are obtained in direct methanol fuel cells. |
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| Keywords: | electrocatalysts nitrogen doping oxygen reduction reaction porous carbon sheets |
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