Effect of shell thickness of Pd core-porous SiO2 shell catalysts on direct synthesis of H2O2 from H2 and O2

Myung gi Seo, Ho Joong Kim, Sang Soo Han, Kwan Young Lee

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In our previous study, we applied Pd@SiO2 core-shell catalysts to hydrogen peroxide synthesis and obtained a higher yield of hydrogen peroxide than that obtained with the use of general supported-catalysts (Pd/SiO2). As an extension of the previous study on Pd@SiO2 catalysts, the effects of the core-shell thickness on the hydrogen peroxide synthesis reaction were examined in this study. A shell below a certain thickness in the core-shell structure of the Pd nanocatalyst results in a decrease in the catalytic activity. Overall, a volcano curve is observed for the hydrogen peroxide production rate as a function of the shell thickness. Through N2-adsorption and desorption, TEM, CO-chemisorption, and XRD analyses, we identify the causes for the improved direct hydrogen peroxide synthesis yields and later optimize the shell thickness for the efficient utilization of Pd.

Original languageEnglish
Pages (from-to)238-243
Number of pages6
JournalJournal of Molecular Catalysis A: Chemical
Volume426
DOIs
Publication statusPublished - 2017 Jan 1

Fingerprint

hydrogen peroxide
Hydrogen peroxide
Hydrogen Peroxide
catalysts
Catalysts
synthesis
Volcanoes
Carbon Monoxide
Chemisorption
Catalyst supports
volcanoes
chemisorption
catalytic activity
Catalyst activity
Desorption
desorption
Transmission electron microscopy
Adsorption
transmission electron microscopy
adsorption

Keywords

  • Core–shell structured catalyst
  • Direct hydrogen peroxide synthesis
  • Palladium catalyst
  • Palladium nanoparticle

ASJC Scopus subject areas

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

Cite this

Effect of shell thickness of Pd core-porous SiO2 shell catalysts on direct synthesis of H2O2 from H2 and O2 . / Seo, Myung gi; Kim, Ho Joong; Han, Sang Soo; Lee, Kwan Young.

In: Journal of Molecular Catalysis A: Chemical, Vol. 426, 01.01.2017, p. 238-243.

Research output: Contribution to journalArticle

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AB - In our previous study, we applied Pd@SiO2 core-shell catalysts to hydrogen peroxide synthesis and obtained a higher yield of hydrogen peroxide than that obtained with the use of general supported-catalysts (Pd/SiO2). As an extension of the previous study on Pd@SiO2 catalysts, the effects of the core-shell thickness on the hydrogen peroxide synthesis reaction were examined in this study. A shell below a certain thickness in the core-shell structure of the Pd nanocatalyst results in a decrease in the catalytic activity. Overall, a volcano curve is observed for the hydrogen peroxide production rate as a function of the shell thickness. Through N2-adsorption and desorption, TEM, CO-chemisorption, and XRD analyses, we identify the causes for the improved direct hydrogen peroxide synthesis yields and later optimize the shell thickness for the efficient utilization of Pd.

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