Catalytic reduction of nitrite ions in drinking water over Pd–Cu/TiO₂ bimetallic catalyst

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• 作者：Wenliang Gao ; Jixin Chen ; Xinxin Guan ; Ruicai Jin ; Fuxiang Zhang ; Naijia Guan
• 关键词：Nitrite ions ; Catalytic reduction ; Pd– ; Cu/TiO₂ bimetallic catalyst ; Characterization ; Mechanism
• 刊名：Catalysis Today
• 出版年：2004
• 出版时间：1 September 2004
• 年：2004
• 卷：93-95
• 期：Complete
• 页码：333-339
• 全文大小：212 K

文摘

Titania supported palladium–copper bimetallic catalysts (Pd–Cu/TiO₂) are prepared by liquid-phase chemical reduction method and then applied in the catalytic reduction of nitrite ions in drinking water. The nitrite conversion and selectivity to N₂ influenced by metal molar ratio (Pd:Cu), H₂ flow rate, CO₂ flow rate, pH value of solution and reaction temperature are also discussed in detail with physical characterizations methods such as XPS, XRD, in situ FT-IR. It is discovered that bimetallic Pd–Cu/TiO₂ catalyst has higher activity than monometallic Pd/TiO₂ catalyst in the catalytic reduction of nitrite ions and a mechanism is proposed to explain this promoting effect of bimetallic catalyst in this paper.