Shape-dependent catalytic activity of palladium nanoparticles for the direct synthesis of hydrogen peroxide from hydrogen and oxygen

Seongmin Kim, Dae Won Lee, Kwan Young Lee

Research output: Contribution to journalArticle

40 Citations (Scopus)

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 languageEnglish
Pages (from-to)48-54
Number of pages7
JournalJournal of Molecular Catalysis A: Chemical
Volume391
Issue number1
DOIs
Publication statusPublished - 2014 Jan 1

Fingerprint

Palladium
hydrogen peroxide
Hydrogen peroxide
octahedrons
Hydrogen Peroxide
catalytic activity
palladium
Hydrogen
flat surfaces
Catalyst activity
Oxygen
Nanoparticles
nanoparticles
oxygen
hydrogen
synthesis
potassium bromides
Stabilizers (agents)
Povidone
ascorbic acid

Keywords

  • Direct synthesis of hydrogen peroxide
  • Nanocatalyst
  • Nanocube
  • Nanooctahedron
  • Palladium

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry
  • Process Chemistry and Technology

Cite this

Shape-dependent catalytic activity of palladium nanoparticles for the direct synthesis of hydrogen peroxide from hydrogen and oxygen. / Kim, Seongmin; Lee, Dae Won; Lee, Kwan Young.

In: Journal of Molecular Catalysis A: Chemical, Vol. 391, No. 1, 01.01.2014, p. 48-54.

Research output: Contribution to journalArticle

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