Effect of Ag+ cations on nonoxidative activation of methane to C2-hydrocarbons

被引：42

作者：

Miao, SJ ^{[1
]}

Wang, Y ^{[1
]}

Ma, D ^{[1
]}

Zhu, QJ ^{[1
]}

Zhou, ST ^{[1
]}

Su, LL ^{[1
]}

Tan, DL ^{[1
]}

Bao, XH ^{[1
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2004年 / 108卷 / 46期

关键词：

D O I：

10.1021/jp047209+

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：

Nonoxidative activation of methane was carried out over Ag/ZSM-5 catalysts, prepared by the wetness impregnation method, and the catalysts were characterized by various techniques. Theoretical calculation was further employed to clarify the reaction mechanism of methane coupling over the catalysts. Ag+ ions were found to be the main Ag species at low loading (1-5 wt %) whereas higher loading (10 wt %) resulted in metal Clusters. Combined with experimental evidence and computer modeling, it is concluded that isolated Ag+ ions play a crucial role in the catalytic coupling of methane under nonoxidative conditions.

引用

页码：17866 / 17871

页数：6

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