Shape-dependent catalytic activity of palladium nanoparticles for the direct synthesis of hydrogen peroxide from hydrogen and oxygen
- Authors
- Kim, Seongmin; Lee, Dae-Won; Lee, Kwan-Young
- Issue Date
- 9월-2014
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Palladium; Nanocube; Nanooctahedron; Nanocatalyst; Direct synthesis of hydrogen peroxide
- Citation
- JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, v.391, pp.48 - 54
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
- Volume
- 391
- Start Page
- 48
- End Page
- 54
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/97569
- DOI
- 10.1016/j.molcata.2014.03.026
- ISSN
- 1381-1169
- 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 {100} and {111} 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 {111} facet is more active than the Pd {100} facet in direct hydrogen peroxide synthesis. (C) 2014 Elsevier B.V. All rights reserved.
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