NDLI: Topography, structure, and formation kinetic mechanism of carbon deposited onto nickel in the temperature range from 400 to 850°C

Content Provider	Springer Nature Link
Author	Chen, Zhi yuan Bian, Liu zhen Wang, Li jun Yu, Zi you Zhao, Hai lei Li, Fu shen Chou, Kuo chih
Copyright Year	2017
Abstract	The carbon deposition behavior on nickel particles was observed within the temperature range from 400 to 800°C in a pure methane atmosphere. The topography, properties, and molecular structure of the deposited carbon were investigated using field-emission scanning electron microscopy (FESEM), temperature-programmed oxidation (TPO) technology, X-ray diffraction (XRD), and Raman spectroscopy. The deposited carbon is present in the form of a film at 400–450°C, as fibers at 500–600°C, and as particles at 650–800°C. In addition, the structure of the deposited carbon becomes more ordered at higher temperatures because both the TPO peak temperature of deposited carbon and the Raman shift of the G band increase with the increase in experimental temperature, whereas the intensity ratio between the D bands and the G band decreases. An interesting observation is that the carbon deposition rate is suppressed in the medium-temperature range (M-T range) and the corresponding kinetic mechanism changes. Correspondingly, the FWHM of the G and D1 bands in the Raman spectrum reaches a maximum and the intensities of the D2, D3, and D4 bands decrease to low limits in the M-T range. These results indicate that carbon structure parameters exhibit two different tendencies with respect to varying temperature. Both of the two group parameters change dramatically as a peak function with increasing reaction temperature within the M-T range.
Starting Page	574
Ending Page	583
Page Count	10
File Format	PDF
ISSN	16744799
Journal	International Journal of Minerals, Metallurgy, and Materials
Volume Number	24
Issue Number	5
e-ISSN	1869103X
Language	English
Publisher	University of Science and Technology Beijing
Publisher Date	2017-05-04
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	nickel carbon deposition kinetic mechanisms solid oxide fuel cells Materials Science Metallic Materials Characterization and Evaluation of Materials Ceramics, Glass, Composites, Natural Materials Surfaces and Interfaces, Thin Films Tribology, Corrosion and Coatings
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Mechanics of Materials Metals and Alloys Geochemistry and Petrology Mechanical Engineering

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