EFFICIENT TREATMENT AND RESOURCE UTILIZATION OF URBAN SOLID WASTE MATERIALS |
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Preparation and Electrocatalytic Oxygen Reduction Performance of Nitrogen Doped Regenerated Activated Carbon |
YE Jiahong1,2,3,4, LI Denian2,3,4, YANG Jizhang2,3,4, ZHAO Yue2,3,4, YUAN Haoran2,3,4,*, CHEN Yong1,2,3,4
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1 School of Biomass Engineering Research, South China Agricultral University, Guangzhou 510642, China 2 Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China 3 Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China 4 Guangdong Provincial Key Laboratory of New Energy and Renewable Energy Research, Development and Application, Guangzhou 510640, China |
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Abstract In order to solve the problems of resource waste and environmental pollution caused by the traditional recycling of hazardous waste activated carbon, this work prepared a nitrogen-doped regenerated waste activated carbon oxygen reduction reaction (ORR) catalyst by using anti-biotic decolorization waste activated carbon as raw material and ammonia gas as nitrogen source, and the nitrogen element was bonded into the activated carbon skeleton through sp2 hybridization by high temperature pyrolysis regeneration. The physical composition, microscopic morphology and electrochemical properties of the nitrogen-doped regenerated activated carbon were analyzed. The results showed that the best perfor-mance of the prepared N-RWAC-1000-1 oxygen reduction electrocatalyst was achieved when the temperature was 1 000 ℃ and the annealing time was 1 h. The N-RWAC-1000-1 had abundant microporous and mesoporous structures with a specific surface area up to 908 m2/g. The starting potential in alkaline medium was 0.92 V (vs.RHE), the half-wave potential was 0.82 V (vs.vs.RHE), both close to commercial 20wt% platinum carbon catalysts. In addition, the nitrogen-doped regenerated carbon possesses better cycling stability and methanol tolerance than commercial platinum carbon and is expected to be a new oxygen reduction catalyst. It also provides a new direction for the high-value utilization of antibiotic decolorization waste activated carbon.
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Published: 25 May 2023
Online: 2023-05-23
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Fund:National Key R & D Program of China(2019YFC1906605),Science and Technology Plan Project Fund of Guangzhou(202201010687),and Basic and Applied Basic Research Fund of Guangdong Province(2022A1515011653). |
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