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Uniformly dispersed carbon-supported bimetallic ruthenium-platinum electrocatalysts for the methanol oxidation reaction.
- Source :
-
Journal of Materials Science . Mar2017, Vol. 52 Issue 6, p3457-3466. 10p. 1 Color Photograph, 1 Diagram, 4 Graphs. - Publication Year :
- 2017
-
Abstract
- Reducing the Pt-based electrocatalysts to sub-nanometer sizes is an effective way to achieve high utilization of noble metals. Herein, we report a successive route to synthesize carbon-supported bimetallic ruthenium-platinum electrocatalysts (Ru-Pt/C) with uniform dispersion and fine sizes. In this strategy, carbon-supported Ru nanoparticles (Ru/C) with a mean size of 1.4 nm are firstly prepared in a mixture of ethylene glycol and water, and the Pt precursors are then reduced in the presence of pre-formed Ru/C. The average diameter of the bimetallic Ru-Pt particles on carbon supports is 1.9 nm, which corresponds to one to two Pt layers deposited on the surface of Ru seeds. The as-prepared bimetallic Ru-Pt/C electrocatalysts are analyzed by the CO stripping voltammetry, a diagnostic electrochemical tool. Compared with the commercial PtRu/C catalyst and the control PtRu/C prepared by a conventional co-reduction method, the bimetallic Ru-Pt/C has higher electrochemical surface area (92.5 m g) and mass activity (483 A g) for methanol oxidation reaction. The strategy reported in this study is effective to produce fine bimetallic Ru-Pt particles (less than 2.0 nm) with uniform dispersion and high activity. [ABSTRACT FROM AUTHOR]
- Subjects :
- *BIMETALLIC catalysts
*RUTHENIUM
*PLATINUM
*ELECTROCATALYSTS
*OXIDATION of methanol
Subjects
Details
- Language :
- English
- ISSN :
- 00222461
- Volume :
- 52
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Journal of Materials Science
- Publication Type :
- Academic Journal
- Accession number :
- 120262319
- Full Text :
- https://doi.org/10.1007/s10853-016-0635-8