Stability test and EXAFS characterization of plasma prepared Pd/HZSM-5 catalyst for methane combustion |
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Authors: | Dangguo Cheng Yongbing Xie |
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Institution: | a Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China b Department of Materials Science, Tottori University, Koyama, Tottori 680-8552, Japan |
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Abstract: | 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. |
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Keywords: | 82 65 &minus s 52 77 &minus j |
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