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Synthesis and characterization of carbon riveted Pt/MWCNTs@TiO2–TiC catalyst with high durability for PEMFCs application

Paper ID Volume ID Publish Year Pages File Format Full-Text
46140 46430 2012 7 PDF Available
Title
Synthesis and characterization of carbon riveted Pt/MWCNTs@TiO2–TiC catalyst with high durability for PEMFCs application
Abstract

Pt/TiC, Pt/TiO2–TiC, and Pt/MWCNTs@TiO2–TiC catalysts have been synthesized by the microwave-assisted polyol process. Moreover, carbon riveted Pt/MWCNTs@TiO2–TiC catalyst based on in situ carbonization of glucose has also been prepared. X-ray diffraction, energy dispersive analysis of X-ray, transmission electron microscopy, X-ray photoelectron spectroscopy, cyclic voltammograms, and accelerated potential cycling tests have been used to characterize the catalysts. Experimental results show that both of the activity and stability of Pt/TiC catalyst cannot meet the requirements of proton exchange membrane fuel cells. In comparison with Pt/TiC, Pt/TiO2–TiC catalyst exhibits lower activity due to poor conductivity of TiO2 and higher stability ascribed to strong metal–support interaction (SMSI) between Pt and TiO2. However, compared with Pt/TiC, Pt/MWCNTs@TiO2–TiC catalyst exhibits both higher activity and stability because of high electrical conductivity of the mixed support and SMSI between Pt nanoparticles and nanocapsule composite MWCNTs@TiO2. Furthermore, the measurement results show that carbon riveted Pt/MWCNTs@TiO2–TiC catalyst with similar activity to the Pt/C and Pt/TiO2–C ones possesses 8.5 times stability as high as that of Pt/C and exhibits 4.5 times life-span as long as that of carbon riveted Pt/TiO2–C reported in our previous study.

Graphical abstractCarbon riveted Pt/MWCNTs@TiO2–TiC catalyst (blue) performs similar activity to the Pt/C and Pt/TiO2–C ones. It possesses 8.5 times stability as high as that of Pt/C. It exhibits 4.5 times life-span as long as that of carbon riveted Pt/TiO2–C which was reported in our previous work. Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights▸ Carbon riveted Pt/MWCNTs@TiO2–TiC catalyst was synthesized based on in situ carbonization of glucose. ▸ Carbon riveted Pt/MWCNTs@TiO2–TiC catalyst performs similar activity to the Pt/C and Pt/TiO2–C ones. ▸ Carbon riveted Pt/MWCNTs@TiO2–TiC catalyst possesses 8.5 times stability as high as that of Pt/C. ▸ Carbon riveted Pt/MWCNTs@TiO2–TiC catalyst exhibits 4.5 times life-span as long as that of carbon riveted Pt/TiO2–C.

Keywords
Electrocatalysts; TiC; Multi-walled carbon nanotubes; Proton exchange membrane fuel cells
First Page Preview
Synthesis and characterization of carbon riveted Pt/MWCNTs@TiO2–TiC catalyst with high durability for PEMFCs application
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 123–124, 23 July 2012, Pages 214–220
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis