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

作     者：O. Yu. Podyacheva A. N. Shmakov A. I. Boronin L. S. Kibis S. V. Koscheev E. Yu. Gerasimov Z. R. Ismagilov 

作者机构：Boreskov Institute of Catalysis Pr. Akademika Lavrentieva 5 Novosibirsk 630090 Russia Novosibirsk State University Ul. Pirogova 2 Novosibirsk 630090 Russia Institute of Coal Chemistry and Material Science Pr. Sovetskiy18 Kemerovo 65000 Russia 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2013年第22卷第2期

页      面：270-278页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：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 2451) Presidium SB RAS (Project 36) Integration Research Projects SB RAS No 75 

主　　题：carbon nanofibers nitrogen-doped carbon nanofibers XRD in situ XPS catalyst 

摘      要：Changes of a 65Ni25Cu10A1203 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%C2I-I4/50%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.