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Origin of performance degradation of palladium-based direct formic acid fuel cells

Paper ID Volume ID Publish Year Pages File Format Full-Text
46827 46450 2011 5 PDF Available
Title
Origin of performance degradation of palladium-based direct formic acid fuel cells
Abstract

The very limited durability of Pd-based anode for direct formic acid fuel cells (DFAFCs) has seriously restricted their practical application. However, the mechanistic clarification on how to remove the poisoning species and to reactivate the Pd-based anode still remains a big challenge. In this work, we have found that Pd oxides/hydrous oxides (POHOs) play a crucial role in promoting better performance and minimizing performance degradation of the Pd-based DFAFCs. The POHOs are unstable under DFAFC conditions. The intrinsic presence or introduction of Pd oxides/hydrous oxides during electrocatalysis of formic acid oxidation is found to promote elimination of poisoning species, thereby leading to a better performance of DFAFCs. The consumption of Pd oxides/hydrous oxides under DFAFC conditions leads to formation of adsorbed CO-like intermediates that are non-removable, and contribute to the irreversible performance degradation. The present study provides new insights into the degradation mechanism of Pd-based DFAFCs and suggests design features for new durable Pd-based nanostructured catalysts.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Pd oxide/hydrous oxides (POHOs) have been identified to play a crucial role in determining better performance and degradation of the Pd-based direct formic acid fuel cells (DFAFCs). ► POHOs suffer from a significant decrease under the DFAFC conditions. ► The introduction of POHOs significantly improves the performance of the DFAFCs.

Keywords
Direct formic acid fuel cell; Pd nanoparticle; Performance degradation; Pd surface oxide
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Origin of performance degradation of palladium-based direct formic acid fuel cells
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 104, Issues 1–2, 27 April 2011, Pages 49–53
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
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