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High efficiency of Pt2+- CeO2 novel thin film catalyst as anode for proton exchange membrane fuel cells

Paper ID Volume ID Publish Year Pages File Format Full-Text
45517 46413 2016 9 PDF Available
Title
High efficiency of Pt2+- CeO2 novel thin film catalyst as anode for proton exchange membrane fuel cells
Abstract

•Pt doped cerium oxide thin film electrocatalyst.•Magnetron sputtering deposition of a proton exchange membrane fuel cell anode.•PEMFC anode with high activity and very low Pt content.•Pt2+ species in cerium oxide exhibit high electrocatalytic activity as PEMFC anode.•DFT calculations show high stability of Pt2+ species in cerium oxide against reduction.

The elevated price of Pt limits the large-scale implementation of commercial proton exchange membrane fuel cells, which effectively convert chemical energy into electricity. In order to increase the cost-efficiency in proton-exchange membrane fuel cells, we have designed a family of novel anode catalysts consisting of thin films of ceria with low Pt loadings sputtered on a nanostructured carbon support. Remarkably, only such small amounts of Pt are necessary for achieving power density values comparable to the reference commercial catalysts, which results in excellent specific activities of our samples. By combining photoelectron spectroscopy and catalytic performance analysis, we have shown that the surface Pt2+ species in cerium oxide exhibit high electrocatalytic activity. Density functional theory calculations show that the great stability of Pt2+ species on ceria makes these resistant to reduction by hydrogenation and suggests that the formation of such stable surface complexes prevents degradation of the nanostructured composite.

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Keywords
Platinum; Cerium oxide; Fuel cell; Thin film
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High efficiency of Pt2+- CeO2 novel thin film catalyst as anode for proton exchange membrane fuel cells
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 197, 15 November 2016, Pages 262–270
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