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Simple fabrication of pineapple root-like palladium-gold catalysts as the high-efficiency cathode in direct peroxide-peroxide fuel cells.
- Source :
-
Journal of Colloid & Interface Science . Jul2017, Vol. 498, p239-247. 9p. - Publication Year :
- 2017
-
Abstract
- Pd-Au/TiC electrodes with various three-dimensional structures are obtained by the pulsed potential electro-deposition in PdCl 2 /HAuCl 4 electrolytes. The morphologies of Pd-Au/TiC composite catalysts are significantly dependent on the component of deposited solutions. The surface appearance of Pd-Au catalysts changes from rime-shaped structure, to feather-like construction, then to pineapple root-like structure and finally to flower-like configuration with the increase of PdCl 2 content in electrolytes. These particular three-dimensional structures may be very suitable for H 2 O 2 electro-reduction, which assures a high utilization of Pd-Au catalysts and provides a large specific surface area. The electro-catalytic activities of H 2 O 2 reduction on the Pd-Au/TiC electrodes improve as increasing the Pd content in Pd-Au alloy catalysts. The pineapple root-like Pd 5 Au 1 /TiC electrode reveals remarkably excellent electrochemical property and desirable stability for catalyzing H 2 O 2 reduction in acid media. The direct peroxide-peroxide fuel cells with a 10 cm 3 min −1 flow rate display the open circuit voltage (OCV) of 0.85 V and the peak power density of 56.5 mW cm −2 at 155 mA cm −2 with desirable cell stability, which is much higher than those previously reported. [ABSTRACT FROM AUTHOR]
- Subjects :
- *PALLADIUM catalysts
*FUEL cells
*PINEAPPLE
*PEROXIDES
*PLATINUM electrodes
Subjects
Details
- Language :
- English
- ISSN :
- 00219797
- Volume :
- 498
- Database :
- Academic Search Index
- Journal :
- Journal of Colloid & Interface Science
- Publication Type :
- Academic Journal
- Accession number :
- 122371074
- Full Text :
- https://doi.org/10.1016/j.jcis.2017.03.071