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Facile synthesis of Pd@Pt octahedra supported on carbon for electrocatalytic applications.
- Source :
- AIChE Journal; Jul2017, Vol. 63 Issue 7, p2528-2534, 7p
- Publication Year :
- 2017
-
Abstract
- Due to the scarcity of Pt, it is highly desirable to construct core-shell structures with ultrathin Pt shells while maintaining their high electrocatalytic activities. However, it is necessary to preferentially synthesize a core with a specific structure before further formation of core-shell catalysts with specific morphologies. This prerequisite greatly increases the complexity of the synthesis process. This article describes a synthetic method of core-shell Pd@Pt octahedra catalysts from Pd nanocubes, truncated nanocubes or truncated octahedra. The formation of octahedral core-shell structures involves two key factors: (1) the oxidative etching process of Pd atoms at the corner sites; (2) the different reduction rates between Pt and Pd precursors. This mechanism can be extended to synthesize carbon-supported sub-8 nm Pd@Pt octahedra from commercial Pd/C catalysts. The derived carbon-supported Pd@Pt octahedra catalysts performed comparable activity and durability for methanol oxidation reaction with state-of-art PtRu/C catalysts. This synthetic method provides an innovative path for large-scale production of well-controlled catalysts. © 2017 American Institute of Chemical Engineers AIChE J, 63: 2528-2534, 2017 [ABSTRACT FROM AUTHOR]
- Subjects :
- PALLADIUM
PLATINUM
ELECTROCATALYSIS
CRYSTAL morphology
OXIDATION
Subjects
Details
- Language :
- English
- ISSN :
- 00011541
- Volume :
- 63
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- AIChE Journal
- Publication Type :
- Academic Journal
- Accession number :
- 123438787
- Full Text :
- https://doi.org/10.1002/aic.15763