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Citation: Liu Bai-Jun, Cai Tian-Xi. Valence States of Cu_3/2PMo₁₂O₄₀ on the Surface of Raney Nickel and Raney Cobalt Catalysts[J]. Acta Physico-Chimica Sinica, ;2004, 20(07): 727-730. doi: 10.3866/PKU.WHXB20040712 shu

Valence States of Cu_3/2PMo₁₂O₄₀ on the Surface of Raney Nickel and Raney Cobalt Catalysts

Liu Bai-Jun ,
Cai Tian-Xi

1.
The Key Laboratory of Catalysis, China National Petroleum Corporation, University of Petroleum Beijing, Beijing　102249;State Key Laboratory of Fine Chemical Engineering, Dalian University of Technology, Dalian　116012

Received Date: 16 January 2004
Available Online: 15 July 2004

The states of Cu3/2PMo12O40,which was used as a modifier for Raney nickel and Raney cobalt, were investigated by XPS technique. It was found that valence states of Cu2＋ and Mo6＋ were greatly changed, i.e. Cu2＋ was reduced to Cu0 while Mo6＋ was partially reduced to Mo5＋ and Mo4+.These changes were due to the presence of active hydrogen adsorbed onto the surface of Raney nickel and Raney cobalt catalysts. Raney nickel contained less low oxidation state Mo than Raney cobalt, which was probably due to the different activity of adsorbed hydrogen species on the Raney nickel surface and Raney cobalt surface. The presence of Cu was beneficial to the hydrogenation of carbonyl. The existence of Mo improved the adsorption and activation of carbonyl. In another word, the presence of Cu and Mo complemented each other in the hydrogenation of carbonyl.
- Raney nickel;Raney cobalt;Cu_3/2PMo₁₂O₄₀;XPS;States of surface
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Valence States of Cu3/2PMo12O40 on the Surface of Raney Nickel and Raney Cobalt Catalysts

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通讯作者: 陈斌, bchen63@163.com

Valence States of Cu_3/2PMo₁₂O₄₀ on the Surface of Raney Nickel and Raney Cobalt Catalysts