Abstract
In this study, single-crystal Pd nanocubes and nanooctahedrons were prepared by the colloidal method and their catalytic activities were compared in direct hydrogen peroxide synthesis. Using sodium tetrachloropalladate (II) as the Pd precursor, l-ascorbic acid (or formaldehyde) as the reducing agent, potassium bromide as the capping agent, and polyvinylpyrrolidone as the stabilizer, Pd nanocubes were obtained in a uniform size (9 nm). Pd octahedrons (23 nm in edge length) were synthesized via seed-mediated growth of the Pd nanocube, where the morphology of the cube was altered to that of a cuboctahedron, truncated octahedron, and octahedron, in series. The cubes and octahedrons were enclosed by {1 0 0} and {1 1 1} facets, respectively. In activity tests, the Pd octahedron presented higher hydrogen peroxide selectivity and productivity than the Pd cube. It is therefore suggested that the Pd {1 1 1} facet is more active than the Pd {1 0 0} facet in direct hydrogen peroxide synthesis.
Original language | English |
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Pages (from-to) | 48-54 |
Number of pages | 7 |
Journal | Journal of Molecular Catalysis A: Chemical |
Volume | 391 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2014 Sept |
Bibliographical note
Funding Information:This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (Ministry of Science, ICT & Future Planning)” (2013, University-Institute Cooperation Program)
Funding Information:
This work was supported by the Human Resources Development program (No. 20114010203050) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Trade, Industry and Energy
Funding Information:
Dr. Dae-Won Lee was supported by Korea University Grant.
Keywords
- Direct synthesis of hydrogen peroxide
- Nanocatalyst
- Nanocube
- Nanooctahedron
- Palladium
ASJC Scopus subject areas
- Catalysis
- Process Chemistry and Technology
- Physical and Theoretical Chemistry