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Catalytic ammonia decomposition over Ru/carbon catalysts: The importance of the structure of carbon support

Paper ID Volume ID Publish Year Pages File Format Full-Text
44431 46025 2007 7 PDF Available
Title
Catalytic ammonia decomposition over Ru/carbon catalysts: The importance of the structure of carbon support
Abstract

Catalytic ammonia decomposition has been of increasing interests as a means of supplying pure hydrogen for fuel cells. In this study, Ru catalysts supported on different carbons were used for catalytic ammonia decomposition. The influences of the porous and graphitic structures of carbon supports on the activities of the catalysts were examined. The catalytic activity over supported Ru catalysts is ranked as Ru/GC (graphitic carbon) > Ru/CNTs (carbon nanotube) > Ru/CB-S (carbon black) > Ru/CB-C > Ru/CMK-3 ≈ Ru/AC. The samples are characterized by XRD, N2 adsorption, Raman spectra and H2 chemisorption. Ru particles are highly dispersed on carbon supports. The optimum range of Ru particle sizes is around 3–4 nm. On the support side, the graphitic structure of the carbons is critical to the activity of the supported Ru catalyst, while the surface area of carbons is less important.

Graphical abstractIn this study, Ru catalysts supported on different carbons were used for ammonia catalytic decomposition. Ru particles are highly dispersed on carbon materials, the surface area of carbons is not a critical factor in the ammonia decomposition, and the graphitic structure of carbon supports is a key issue for high catalytic performance in the NH3 decomposition process.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Ammonia decomposition; Catalysts; Carbon support; Graphitic structure; Pore structure
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Catalytic ammonia decomposition over Ru/carbon catalysts: The importance of the structure of carbon support
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 320, 22 March 2007, Pages 166–172
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
Online Support
Any Questions? feel free to contact us