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Catalysts for the hydrolysis of aqueous borohydride solutions to produce hydrogen for PEM fuel cells

Paper ID Volume ID Publish Year Pages File Format Full-Text
48653 46516 2007 9 PDF Available
Title
Catalysts for the hydrolysis of aqueous borohydride solutions to produce hydrogen for PEM fuel cells
Abstract

The objective of the present study was to understand the superior catalytic performance of PtRu-LiCoO2 catalyst for hydrogen (H2) generation from aqueous sodium borohydride (NaBH4) solutions by comparing the catalytic activity of various PtRu-supported catalysts. Three of the support materials namely cobalt oxide (Co3O4), lithium nickel oxide (LiNiO2) and lithium manganese oxide (LiMnO2) were synthesized and characterized using XRD. The PtRu-supported catalysts with eight different support materials were prepared and characterized using XRD and BET surface area measurements. The results revealed excellent hydrogen generation activity of Co3O4 and LiCoO2 for the hydrolysis of NaBH4. Actually, the catalytic activity of Co3O4 and LiCoO2 is due to the formation of cobalt boride (CoB) by the reduction of these oxides by NaBH4. A model is proposed to explain the hydrogen generation profile of the above catalysts. The CoB formation is confirmed by XPS studies. Further, the performance of Co3O4 and LiCoO2 was compared with various noble metal catalysts. The performance of Co3O4 is at par with the noble metal based catalysts at low concentration of NaBH4 and far superior to noble metal based catalysts at higher concentration.

Keywords
Borohydride hydrolysis; Hydrogen; PEM fuel cells; Cobalt oxide (Co3O4); Lithium cobalt oxide (LiCoO2); PtRu-supported catalysts
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Catalysts for the hydrolysis of aqueous borohydride solutions to produce hydrogen for PEM fuel cells
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 77, Issues 1–2, 30 November 2007, Pages 206–214
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