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Pd catalysts supported onto nanostructured carbon materials for CO2 valorization by electrochemical reduction

Paper ID Volume ID Publish Year Pages File Format Full-Text
44858 46375 2015 13 PDF Available
Title
Pd catalysts supported onto nanostructured carbon materials for CO2 valorization by electrochemical reduction
Abstract

•Carbon-supported Pd catalysts (Pd/C) were tested in the CO2 electroreduction.•Different nanostructured carbon materials were used as catalyst supports.•Cyclic voltammetry studies showed that CO2 was effectively reduced at Pd/C catalysts.•Influence of the carbon supports on the activity was stated.

Pd nanoparticles have been supported onto different novel carbon materials to be used in the electroreduction of CO2 to high-added value products. Carbon nanocoils (CNCs), carbon nanofibers (CNFs) and ordered mesoporous carbon materials (OMCs) have been studied as support of the catalysts. In addition, Pd catalyst supported onto Vulcan XC-72R has been synthesized in order to establish a comparison with the commercial support. In this way, the influence of the carbon material on the physicochemical and electrochemical properties of the catalysts for the CO2 electroreduction process can be analyzed. Supports presented different morphologies and structures. CNFs and CNCs exhibited a crystalline structure with well-aligned graphitic layers and OMCs a hexagonal ordered structure composed of not crystalline carbon. Finally, Vulcan presented an intermediate structure between amorphous and graphitic. These differences do not affect significantly the average Pd crystallite size, although a different metal dispersion was found depending on the carbon material. On the other hand, cyclic voltammetry studies showed that CO2 was effectively reduced to other species at the surface of Pd/C catalysts. Additionally, it was proved that these species were adsorbed onto Pd at −1.0 V vs Ag/AgCl. Finally, a different catalytic activity towards the CO2 reduction reaction was observed for the different electrocatalysts, indicating an influence of the carbon support.

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Keywords
Carbon nanofibers; Carbon nanocoils; Ordered mesoporous carbon materials; CO2 electroreduction; Palladium
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Pd catalysts supported onto nanostructured carbon materials for CO2 valorization by electrochemical reduction
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 163, February 2015, Pages 83–95
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