1. On the reactivity of carbon formed from CO CVD over Ni(1 1 1)/TiO2.
- Author
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Zhou, Rui, Cao, Xinxiang, Jia, Xinyu, Wang, Jiajun, and Liu, Chang-jun
- Subjects
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CHEMICAL vapor deposition , *CARBON monoxide , *CARBON films , *THIN films , *GRAPHENE oxide - Abstract
Graphical abstract Highlights • CVD temperature has a significant effect on the structure of the formed carbon. • Graphene-like carbon films can be fabricated at low CVD temperatures. • The graphene-like films show similar structure of reduced graphene oxides. • Graphene-like carbon films possess enhanced reactivity with hydrogen and CO 2. Abstract The formation and reactivity of carbon on the supported nickel catalyst is a key issue for the low temperature activity and stability with methanation, reforming and other reactions. In this work, Ni(1 1 1)/TiO 2 was prepared and applied as the catalyst to deposit carbon using low temperature chemical vapor deposition (CVD) of carbon monoxide. It was found that the CVD temperature could significantly affect the formation of carbon. With the CVD temperature decreasing, the disorder of the carbon increased, while the degree of graphitization was reduced. As a result, graphene-like films can be obtained at low CVD temperatures (from 300 to 350 °C). Such carbon films show a significantly improved reactivity with hydrogen and carbon dioxide. This explains the excellent low temperature activity and stability for CO 2 or CO methanation over Ni catalysts with Ni(1 1 1). [ABSTRACT FROM AUTHOR]
- Published
- 2019
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