Stability test and EXAFS characterization of plasma prepared Pd/HZSM-5 catalyst for methane combustion

被引：14

作者：

Cheng, Dangguo ^{[1
]}

Okumura, Kazu ^{[2
]}

Xie, Yongbing ^{[1
]}

Liu, Chang-Jun ^{[1
]}

机构：

[1] Tianjin Univ, Minist Educ, Key Lab Green Chem Technol, Tianjin 300072, Peoples R China

[2] Tottori Univ, Dept Mat Sci, Tottori 6808552, Japan

来源：

APPLIED SURFACE SCIENCE | 2007年 / 254卷 / 05期

基金：

中国国家自然科学基金;

关键词：

methane combustion; Pd/HZSM-5; stability; glow discharge; plasma; EXAFS;

D O I：

10.1016/j.apsusc.2007.07.004

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：

Pd/HZSM-5 catalysts prepared via glow discharge plasma reduction followed by calcination thermally show excellent enhanced stability for methane combustion. EXAFS characterization confirms that argon glow discharge reduces Pd/HZSM-5 catalyst effectively at close to room temperature. After thermal calcination of argon plasma reduced Pd/HZSM-5 catalyst under air, specific tetragonal PdO species are formed. This kind of active PdO species keeps stable during methane combustion, which leads to the observed excellent stability of plasma prepared Pd/HZSM-5 catalyst. EXAFS characterization also shows argon plasma reduction can help to remove Cl, which has a negative effect on catalysts properties. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：1506 / 1510

页数：5

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