Performance of Pd-Ag/Al2O3 catalysts prepared by the selective deposition of Ag onto Pd in acetylene hydrogenation

被引：57

作者：

Lee, Ji Hoon ^{[1
,2
]}

Kim, Seok Ki ^{[1
,2
]}

Ahn, In Young ^{[1
,2
]}

Kim, Woo-Jae ^{[3
]}

Moon, Sang Heup ^{[1
,2
]}

机构：

[1] Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 151744, South Korea

[2] Seoul Natl Univ, Inst Chem Proc, Seoul 151744, South Korea

[3] Kyungwon Univ, Div Energy & Biol Engn, Gyeonggi Do 461701, South Korea

来源：

CATALYSIS COMMUNICATIONS | 2011年 / 12卷 / 13期

关键词：

Acetylene hydrogenation; Pd; Ag; Surface redox method; Ethylene selectivity; CO ADSORPTION; ETHYLENE; PD/SIO2; ALLOYS;

D O I：

10.1016/j.catcom.2011.04.015

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：

The performance of Ag-promoted Pd/Al2O3 catalysts, which were prepared by the selective deposition of Ag onto Pd using a surface redox (SR) method, during acetylene hydrogenation was compared with that of catalysts prepared by impregnation. The Pd surface was more effectively modified with Ag added by SR, even when small amounts of Ag were added. The catalyst prepared by SR showed a higher ethylene selectivity than the one prepared by impregnation, because SR allowed both the preferential deposition of Ag on the low-coordination sites of Pd and a greater electronic modification of Pd by Ag. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1251 / 1254

页数：4

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