Exploration of the preparation of Cu/TiO2 catalysts by deposition-precipitation with urea for selective hydrogenation of unsaturated hydrocarbons
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- 作者：Zhao Wang ; Dalil Brouri ; Sandra Casale ; Laurent Delannoy ; Catherine Louis ; Catherine.louis@upmc.fr" class="auth_mail" title="E-mail the corresponding author
- 关键词：Deposition&ndash ; precipitation with urea ; Cu/TiO2 ; Selective butadiene hydrogenation
- 刊名：Journal of Catalysis
- 出版年：2016
- 出版时间：August 2016
- 年：2016
- 卷：340
- 期：Complete
- 页码：95-106
- 全文大小：2159 K
文摘
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Cu2+ deposition on TiO2 surface occurs at pH lower than the PZC of TiO2.
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During DPu, Cu2(OH)3NO3 is submitted to Oswald ripening and decomposes to CuO.
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Supported Cu2(OH)3NO3 leads to small Cu particles, while CuO leads to large ones after reduction.
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Cu/TiO2 is highly selective in BD hydrogenation to butenes.
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Small Cu particles (ex-Cu2(OH)3NO3) are more catalytically active and stable than large ones (ex-CuO).