能源化学(英文) ›› 2013, Vol. 22 ›› Issue (2): 270-278.

• Articles • 上一篇    下一篇

A correlation between structural changes in a Ni-Cu catalyst during decomposition of ethylene/ammonia mixture and properties of nitrogen-doped carbon nanofibers

O. Yu. Podyachevaa, A. N. Shmakova,b, A. I. Boronina, L. S. Kibisa, S. V. Koscheeva, E. Yu. Gerasimova, Z. R. Ismagilova,c   

  1. a. Boreskov Institute of Catalysis, Pr. Akademika Lavrentieva 5, Novosibirsk 630090, Russia;
    b. Novosibirsk State University, Ul. Pirogova 2, Novosibirsk 630090, Russia;
    c. Institute of Coal Chemistry and Material Science, Pr. Sovetskiy18, Kemerovo 65000, Russia
  • 收稿日期:2012-10-25 修回日期:2012-12-13 出版日期:2013-03-20 发布日期:2013-04-04
  • 通讯作者: O. Yu. Podyacheva
  • 基金资助:
    The work was supported by the Federal Target Program “Scientific and Educational Personnel of Innovative Russia” 2009-2013 (Agreement 8429), RFBR Grant No. 12-03-01091-a, Presidium RAS (Project 24.51), Presidium SB RAS (Project 36), and Integration Research Projects SB RAS No. 75.

A correlation between structural changes in a Ni-Cu catalyst during decomposition of ethylene/ammonia mixture and properties of nitrogen-doped carbon nanofibers

O. Yu. Podyachevaa, A. N. Shmakova,b, A. I. Boronina, L. S. Kibisa, S. V. Koscheeva, E. Yu. Gerasimova, Z. R. Ismagilova,c   

  1. a. Boreskov Institute of Catalysis, Pr. Akademika Lavrentieva 5, Novosibirsk 630090, Russia;
    b. Novosibirsk State University, Ul. Pirogova 2, Novosibirsk 630090, Russia;
    c. Institute of Coal Chemistry and Material Science, Pr. Sovetskiy18, Kemerovo 65000, Russia
  • Received:2012-10-25 Revised:2012-12-13 Online:2013-03-20 Published:2013-04-04
  • Supported by:
    The work was supported by the Federal Target Program “Scientific and Educational Personnel of Innovative Russia” 2009-2013 (Agreement 8429), RFBR Grant No. 12-03-01091-a, Presidium RAS (Project 24.51), Presidium SB RAS (Project 36), and Integration Research Projects SB RAS No. 75.

摘要: Changes of a 65Ni25Cu10Al2O3 catalyst consisting of Ni-enriched and Cu-enriched alloys were investigated in the bulk and on the surface during the growth of nitrogen-doped carbon nanofibers (N-CNFs) by decomposition of a 50%C2H4/50%NH3 mixture using in situ X-ray diffraction (XRD) analysis, ex situ X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) techniques. It was shown that N-CNF growth at 450-650 ℃ is accompanied by dissolution of carbon and nitrogen in the Ni-enriched alloy, whereas Cu-enriched alloy remains inactive. A correlation between nickel and copper surface concentrations and properties of N-CNFs in relation to the nitrogen content was found. It was demonstrated that phase composition of the catalyst during N-CNF growth determines the type of N-CNFs structure.

关键词: carbon nanofibers, nitrogen-doped carbon nanofibers, XRD in situ, XPS, catalyst

Abstract: Changes of a 65Ni25Cu10Al2O3 catalyst consisting of Ni-enriched and Cu-enriched alloys were investigated in the bulk and on the surface during the growth of nitrogen-doped carbon nanofibers (N-CNFs) by decomposition of a 50%C2H4/50%NH3 mixture using in situ X-ray diffraction (XRD) analysis, ex situ X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) techniques. It was shown that N-CNF growth at 450-650 ℃ is accompanied by dissolution of carbon and nitrogen in the Ni-enriched alloy, whereas Cu-enriched alloy remains inactive. A correlation between nickel and copper surface concentrations and properties of N-CNFs in relation to the nitrogen content was found. It was demonstrated that phase composition of the catalyst during N-CNF growth determines the type of N-CNFs structure.

Key words: carbon nanofibers, nitrogen-doped carbon nanofibers, XRD in situ, XPS, catalyst