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Efficient hydrogen peroxide decomposition on bimetallic Pt–Pd surfaces

Paper ID Volume ID Publish Year Pages File Format Full-Text
50828 46817 2010 6 PDF Available
Title
Efficient hydrogen peroxide decomposition on bimetallic Pt–Pd surfaces
Abstract

Hydrogen peroxide was efficiently decomposed on Pt–Pd surface deposited on Nafion membrane. Comparing the activities for the different materials, the activity for the decomposition of hydrogen peroxide was found to decrease in the order of Pt–Pd surface > MnO2 > K2Cr2O7 > Au > Polycrystalline Pt plate. Kinetics and thermodynamics of the decomposition process were investigated. It was observed that the decomposition process followed bimolecular first order kinetics, which was well fitted with Eley–Rideal (E–R) model. In this paper, the reason of efficient catalytic decomposition of hydrogen peroxide over bi–metallic Pt–Pd surface has been discussed.

Graphical AbstractFig. Comparisons of catalytic decomposition of H2O2 solution over A1(Pt–Pd;2.1 mg)/Nafion assembly, A2(Pt–Pd;3.3 mg)/Nafion assembly, MnO2(50 mg),K2Cr2O7 (50 mg), Au–PC (4.2 mg) and Pt plate. [H2O2] = 0.50 M; Volume of the reactor 250 ml. Geometric surface area of catalyst 12.0 cm2.Novel Pt–Pd catalyst was developed, which successfully could decompose H2O2 without adding any foreign materials. This catalyst is several times effective than an ordinary polycrystalline Pt surface. The altered electronic property and or enlarged surface area were the reason of enhanced catalytic ability.Figure optionsDownload full-size imageDownload as PowerPoint slideResearch Highlights► The bimetallic Pt-Pd surface was exclusively reactive in decomposition of H2O2. ► The catalytic surface was convincingly stable for long time use. ► The decomposition kinetics followed the Elley-Rideal model of surface reaction. ► The electronic properties as well as the large surface area of the Pt-Pd films have been identified as the reasons of enhanced catalytic ability.

Keywords
Metal film; Decomposition; Hydrogen peroxide; Efficiency; Nafion membrane
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Efficient hydrogen peroxide decomposition on bimetallic Pt–Pd surfaces
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 12, Issue 4, 15 December 2010, Pages 286–291
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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Any Questions? feel free to contact us