Hierarchically porous nitrogen-doped graphene aerogels as efficient metal-free oxygen reduction catalysts

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• 作者：Zongsheng Hou^a ; ¹ ; Yeqing Jin^b ; ¹ ; Xin Xi^b ; Tao Huang^a ; Dongqing Wu^a ; ^{wudongqing@sjtu.edu.cn} ; Peimin Xu^b ; Ruili Liu^c ; ^{ruililiu@sjtu.edu.cn}
• 关键词：Nitrogen-doping ; Graphene aerogel ; Oxygen reduction reaction ; Metal-free catalyst
• 刊名：Journal of Colloid and Interface Science
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：488
• 期：Complete
• 页码：317-321
• 全文大小：1829 K
• 卷排序：488

文摘

Nitrogen-doped graphene aerogels with hierarchically porous architectures (N-Gs) are fabricated through the co-assembly of graphene oxide and o-phthalonitrile in a solvothermal process and the thermal treatment of the obtained composites at different temperatures. The structural characterizations indicate that both mesopores and macropores exist in the monolithic N-Gs. More importantly, the architectures, porosities and compositions show obvious dependence on the thermal treatment temperature. As the metal-free catalyst for oxygen reduction reaction in basic media, the sample thermally treated at 750 °C shows the best catalytic performances among the three N-Gs, which is owing to its advantages in the surface areas and content of active N species.