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Nano-sized Ni particles on hollow alumina ball: Catalysts for hydrogen production

Paper ID Volume ID Publish Year Pages File Format Full-Text
48986 46536 2007 9 PDF Available
Title
Nano-sized Ni particles on hollow alumina ball: Catalysts for hydrogen production
Abstract

Nickel nanoparticulate catalysts supported on hollow Al2O3 ball (<3 μm in diameter) have been prepared by spraying a mixed solution of nickel and aluminum nitrates in atmospheric pressure plasma. A wall of each ball (ca. several 10 nm in thickness) consisted of uniformly dispersed oxide bricks of ca. 30 nm sizes, which were identified as densely packed NiO, NiAl2O4 and Al2O3 crystallites. Highly dispersed Ni particles (<10 nm in diameter) have been formed on the ball surfaces by H2 reduction of NiO crystallites, surrounded by the nano-sized oxide bricks of NiAl2O4 and Al2O3. A catalytic activity of the Ni catalyst thus prepared for methane steam reforming reaction was tested from a viewpoint of the application to fuel processors for polymer electrolyte fuel cells (PEFCs). The results showed the catalyst possessed superior performances for the reaction in the activity and the resistance to coke deposition even under a low H2O/CH4 molar ratio (S/C < 2) condition.

Keywords
Solution-spraying plasma method; Fuel cell; Steam reforming hydrogen production; Nano-sized Ni catalyst; Hollow ball Al2O3 support
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 71, Issues 3–4, 15 February 2007, Pages 237–245
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
100% Money Back Guarantee
Full-text PDF Download
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