Heteroatom-Doped Graphene for Efficient NO Decomposition by Metal-Free Catalysis
Yan Wang1, Yuesong Shen1, Yiwen Zhou1
1Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), College of Materials Science and Engineering , Nanjing Tech University , Nanjing 210009 , China.
Abstract:
N, S, and B-doped graphene was fabricated by thermally treating graphene oxide with heteroatom-containing precursors and its catalytic behavior for NO decomposition reaction was evaluated. For the first time, the feasibility for heteroatom-doped graphene to be effectively used for decomposing NO was experimentally confirmed. The activity of different heteroatom-doped graphene follows the order: N-doped graphene > S-doped graphene > B-doped graphene. The electronegativity difference, specific area, and unique functional groups (pyridinic N and thiophene S) of the heteroatom-doped graphene play a crucial role in the catalytic performance. Furthermore, the effect of pyridinic N and thiophene S on the reaction mechanism was proposed. Pyridinic N and thiophene S can transfer extra electrons into π-antibonding orbit of NO, thus weakening N-O bond.
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