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Nitrogen-doped porous carbon nanosheets made from biomass as highly active electrocatalyst for oxygen reduction reaction
The successful commercialization of fuel cells requires the efficient electrocatalyst to make the oxygen reduction reaction (ORR) fast because of the sluggish nature of ORR and the high cost of the platinum catalysts. In this work, we report the excellent performance of metal-free nitrogen-doped por...
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Published in: | Journal of power sources 2014-12, Vol.272, p.8-15 |
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description | The successful commercialization of fuel cells requires the efficient electrocatalyst to make the oxygen reduction reaction (ORR) fast because of the sluggish nature of ORR and the high cost of the platinum catalysts. In this work, we report the excellent performance of metal-free nitrogen-doped porous carbon nanosheets (NPCN) with hierarchical porous structure and a high surface area of 1436.02 m super(2) g super(-1) for catalyzing ORR. The active NPCN is synthesized via facile high-temperature carbonization of natural ginkgo leaves followed by purification and ammonia post-treatment without using additional supporting templates and activation processes. In O sub(2)-saturated 0.1 M KOH solution, the resultant NPCN exhibits a high kinetic-limiting current density of 13.57 mA cm super(-2) at -0.25 V (vs. Ag/AgCl) approaching that of the commercial Pt/C catalyst (14 mA cm super(-2)) and long-term electrochemical stability. Notably, the NPCN shows a slightly negative ORR half-wave potential in comparison with Pt/C ( Delta E sub(1/2) = 19 mV). The excellent electrocatalytic properties of NPCN originate from the combined effect of optimal nitrogen doping, high surface area, and porous architecture, which induce the high-density distribution of highly active and stable catalytic sites. |
doi_str_mv | 10.1016/j.jpowsour.2014.07.180 |
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In this work, we report the excellent performance of metal-free nitrogen-doped porous carbon nanosheets (NPCN) with hierarchical porous structure and a high surface area of 1436.02 m super(2) g super(-1) for catalyzing ORR. The active NPCN is synthesized via facile high-temperature carbonization of natural ginkgo leaves followed by purification and ammonia post-treatment without using additional supporting templates and activation processes. In O sub(2)-saturated 0.1 M KOH solution, the resultant NPCN exhibits a high kinetic-limiting current density of 13.57 mA cm super(-2) at -0.25 V (vs. Ag/AgCl) approaching that of the commercial Pt/C catalyst (14 mA cm super(-2)) and long-term electrochemical stability. Notably, the NPCN shows a slightly negative ORR half-wave potential in comparison with Pt/C ( Delta E sub(1/2) = 19 mV). The excellent electrocatalytic properties of NPCN originate from the combined effect of optimal nitrogen doping, high surface area, and porous architecture, which induce the high-density distribution of highly active and stable catalytic sites.</description><identifier>ISSN: 0378-7753</identifier><identifier>EISSN: 1873-2755</identifier><identifier>DOI: 10.1016/j.jpowsour.2014.07.180</identifier><identifier>CODEN: JPSODZ</identifier><language>eng</language><publisher>Amsterdam: Elsevier</publisher><subject>Applied sciences ; Biomass ; Carbon ; Catalysis ; Catalysts ; Catalysts: preparations and properties ; Chemistry ; Electrocatalysts ; Electrochemistry ; Energy ; Energy. 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In this work, we report the excellent performance of metal-free nitrogen-doped porous carbon nanosheets (NPCN) with hierarchical porous structure and a high surface area of 1436.02 m super(2) g super(-1) for catalyzing ORR. The active NPCN is synthesized via facile high-temperature carbonization of natural ginkgo leaves followed by purification and ammonia post-treatment without using additional supporting templates and activation processes. In O sub(2)-saturated 0.1 M KOH solution, the resultant NPCN exhibits a high kinetic-limiting current density of 13.57 mA cm super(-2) at -0.25 V (vs. Ag/AgCl) approaching that of the commercial Pt/C catalyst (14 mA cm super(-2)) and long-term electrochemical stability. Notably, the NPCN shows a slightly negative ORR half-wave potential in comparison with Pt/C ( Delta E sub(1/2) = 19 mV). The excellent electrocatalytic properties of NPCN originate from the combined effect of optimal nitrogen doping, high surface area, and porous architecture, which induce the high-density distribution of highly active and stable catalytic sites.</description><subject>Applied sciences</subject><subject>Biomass</subject><subject>Carbon</subject><subject>Catalysis</subject><subject>Catalysts</subject><subject>Catalysts: preparations and properties</subject><subject>Chemistry</subject><subject>Electrocatalysts</subject><subject>Electrochemistry</subject><subject>Energy</subject><subject>Energy. Thermal use of fuels</subject><subject>Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc</subject><subject>Exact sciences and technology</subject><subject>Fuel cells</subject><subject>General and physical chemistry</subject><subject>Ginkgo</subject><subject>Miscellaneous (electroosmosis, electrophoresis, electrochromism, electrocrystallization, ...)</subject><subject>Nanostructure</subject><subject>Natural energy</subject><subject>Platinum</subject><subject>Reduction</subject><subject>Surface area</subject><subject>Theory of reactions, general kinetics. Catalysis. 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Thermal use of fuels</topic><topic>Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc</topic><topic>Exact sciences and technology</topic><topic>Fuel cells</topic><topic>General and physical chemistry</topic><topic>Ginkgo</topic><topic>Miscellaneous (electroosmosis, electrophoresis, electrochromism, electrocrystallization, ...)</topic><topic>Nanostructure</topic><topic>Natural energy</topic><topic>Platinum</topic><topic>Reduction</topic><topic>Surface area</topic><topic>Theory of reactions, general kinetics. Catalysis. 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In this work, we report the excellent performance of metal-free nitrogen-doped porous carbon nanosheets (NPCN) with hierarchical porous structure and a high surface area of 1436.02 m super(2) g super(-1) for catalyzing ORR. The active NPCN is synthesized via facile high-temperature carbonization of natural ginkgo leaves followed by purification and ammonia post-treatment without using additional supporting templates and activation processes. In O sub(2)-saturated 0.1 M KOH solution, the resultant NPCN exhibits a high kinetic-limiting current density of 13.57 mA cm super(-2) at -0.25 V (vs. Ag/AgCl) approaching that of the commercial Pt/C catalyst (14 mA cm super(-2)) and long-term electrochemical stability. Notably, the NPCN shows a slightly negative ORR half-wave potential in comparison with Pt/C ( Delta E sub(1/2) = 19 mV). The excellent electrocatalytic properties of NPCN originate from the combined effect of optimal nitrogen doping, high surface area, and porous architecture, which induce the high-density distribution of highly active and stable catalytic sites.</abstract><cop>Amsterdam</cop><pub>Elsevier</pub><doi>10.1016/j.jpowsour.2014.07.180</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0001-8476-1314</orcidid></addata></record> |
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subjects | Applied sciences Biomass Carbon Catalysis Catalysts Catalysts: preparations and properties Chemistry Electrocatalysts Electrochemistry Energy Energy. Thermal use of fuels Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc Exact sciences and technology Fuel cells General and physical chemistry Ginkgo Miscellaneous (electroosmosis, electrophoresis, electrochromism, electrocrystallization, ...) Nanostructure Natural energy Platinum Reduction Surface area Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry |
title | Nitrogen-doped porous carbon nanosheets made from biomass as highly active electrocatalyst for oxygen reduction reaction |
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