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

被引：14

作者：

Seo, Myung-Gi ^{[1
]}

Kim, Ho Joong ^{[1
]}

Han, Sang Soo ^{[2
]}

Lee, Kwan-Young ^{[1
,3
]}

机构：

[1] Korea Univ, Dept Chem & Biol Engn, 145 Anam Ro, Seoul 02841, South Korea

[2] Korea Inst Sci & Technol, Computat Sci Res Ctr, Hwarangno 14 Gil 5, Seoul 02792, South Korea

[3] Korea Univ, Green Sch, 145 Anam Ro, Seoul 02841, South Korea

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2017年 / 426卷

基金：

新加坡国家研究基金会;

关键词：

Palladium catalyst; Core-shell structured catalyst; Palladium nanoparticle; Direct hydrogen peroxide synthesis; HYDROGEN-PEROXIDE SYNTHESIS; PD/SIO2; CATALYST; H-2-TO-H2O2; OXIDATION; AQUEOUS-MEDIUM; OXYGEN; NANOPARTICLES; HYDROCRACKING; DESTRUCTION; PALLADIUM; CHLORIDE;

D O I：

10.1016/j.molcata.2016.11.021

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 N-2-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. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：238 / 243

页数：6

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