Direct synthesis of hydrogen peroxide from hydrogen and oxygen over insoluble Cs2.5H0.5PW12O40 heteropolyacid supported on Pd/MCF

被引：22
|
作者：
Park, Sunyoung [1 ]
Park, Dong Ryul [1 ]
Choi, Jung Ho [1 ]
Kim, Tae Jin [2 ]
Chung, Young-Min [2 ]
Oh, Seung-Hoon [2 ]
Song, In Kyu [1 ]
机构：
[1] Seoul Natl Univ, Inst Chem Proc, Sch Chem & Biol Engn, Seoul 151744, South Korea
[2] SK Energy Corp, Taejon 305712, South Korea
来源：
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2010年 / 332卷 / 1-2期
关键词：
Hydrogen peroxide; Insoluble heteropolyacid; Palladium; MCF silica; DIRECT OXIDATION; LIQUID-PHASE; H-2; H2O2; O-2; CATALYSTS; PALLADIUM; ACID; IMMOBILIZATION; EPOXIDATION;
D O I：
10.1016/j.molcata.2010.08.024
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：
Insoluble CS2.5H0.5PW12O40 heteropolyacid supported on Pd/MCF (CsPW/Pd/MCF-X (X= 10.0, 21.7, 35.7, 52.6, and 68.9)) was prepared with a variation of Cs2.5H0.5PW12O40 content (X, wt%) for use in direct synthesis of hydrogen peroxide from hydrogen and oxygen. High catalytic performance of CsPW/Pd/MCF-X catalysts compared to Pd/MCF catalyst was attributed to the enhanced acid property of CsPW/Pd/MCF-X catalysts. Selectivity for hydrogen peroxide and yield for hydrogen peroxide over CsPW/Pd/MCF-X catalysts showed a volcano-shaped curve with respect to Cs2.5H0.5PW12O40 content. Acidity of the catalysts also showed a volcano-shaped trend with respect to Cs2.5H0.5PW12O40 content. It was revealed that yield for hydrogen peroxide increased with increasing acidity of CsPW/Pd/MCF-X catalyst. Acidity of CsPW/Pd/MCF-X catalyst played a crucial role in determining the catalytic performance in the direct synthesis of hydrogen peroxide. (C) 2010 Elsevier B.V. All rights reserved.
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页码：76 / 83
页数：8
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