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.
Bibliographical noteFunding Information:
This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) ( NRF-2016M3D1A1021143 ). This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MSIP) (2016, University-Institute cooperation program).
© 2016 Elsevier B.V.
- Core–shell structured catalyst
- Direct hydrogen peroxide synthesis
- Palladium catalyst
- Palladium nanoparticle
ASJC Scopus subject areas
- Process Chemistry and Technology
- Physical and Theoretical Chemistry