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Thin films of Co–B prepared by pulsed laser deposition as efficient catalysts in hydrogen producing reactions

Paper ID Volume ID Publish Year Pages File Format Full-Text
43604 45979 2007 7 PDF Available
Title
Thin films of Co–B prepared by pulsed laser deposition as efficient catalysts in hydrogen producing reactions
Abstract

Hydrogen generation by catalytic hydrolysis of sodium borohydride (NaBH4) is studied by using Co–B-based thin film catalyst synthesized by pulsed laser deposition (PLD) technique. Co–B nanoparticles, produced in the catalyst film after the laser ablation process, act as active centers producing significantly higher H2 generation rate than Co–B bulk powder. Surface morphology was studied by using scanning electron microscopy and compositional analysis was established by using X-photoelectron and infrared spectroscopies. Films were deposited at different PLD set-up parameters in order to understand the possible role of size and density of the nanoparticles in the catalytic process. Cobalt has been found here to act as an efficient catalyst only when alloyed with boron which partially prevents cobalt oxidation. In particular we report that when used as suitable thin films, Co–B produces H2 with a maximum generation rate of about 3300 ml/min per gram of catalyst.

Graphical abstractHydrogen generation by catalytic hydrolysis of sodium borohydride (NaBH4) is studied by using Co–B-based thin film catalyst synthesized by pulsed laser deposition (PLD) technique. Co–B nanoparticles, produced in the catalyst film after the laser ablation process, act as active centers producing significantly higher H2 generation rate than Co–B bulk powder. Films were deposited at different PLD set-up parameters in order to estimate the density of the nanoparticles and to understand the role of their size in the catalytic process. Cobalt has been found here to act as an efficient catalyst only when alloyed with boron which partially prevents cobalt oxidation. In particular we report that when used as suitable thin films, Co–B produces H2 with a maximum generation rate of about 3300 ml/[min g catalyst]. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Hydrogen generation; Catalyst; Sodium borohydride; Nanoparticles; Cobalt boride
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Thin films of Co–B prepared by pulsed laser deposition as efficient catalysts in hydrogen producing reactions
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 323, 30 April 2007, Pages 18–24
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
Online Support
Any Questions? feel free to contact us