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Preparation of TiO2 Nanotube Supported Pd for the Hydrogenation of 4-carboxy-benzaldehyde

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Abstract

Mesoporous TiO2 nanotube (TNT) with high surface area was synthesized and used to support palladium. The as prepared Pd/TNT was characterized by different physico-chemical techniques, such as XRD, SEM, TEM, N2 physisorption, CO chemisorption and XPS. The catalytic behavior for the hydrogenation of 4-carboxy-benzaldehyde was evaluated and compared with that of a commercial Pd/C. It was observed that Pd species was highly dispersed on TNT at a nominal 0.5% loading, and mainly existed in a metallic state. In comparison with this commercial Pd/C, the Pd/TNT displayed a better catalytic performance for the conversion of 4-carboxy-benzaldehyde. At 0.6 MPa and 280 °C, the Pd/TNT tended to catalytically convert 4-carboxy-benzaldehyde into more stable benzoic acid via a decarbonylation process.

Graphical Abstract

A Pd/TNT with high palladium dispersion was successfully prepared by the wet incipient impregnation using a high surface area TiO2 nanotube support, and the fresh catalyst tended to catalytically convert 4-carboxy-benzaldehyde into more stable benzoic acid in the initial operation stage.

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Acknowledgements

We thank Dr. Yanwen Ma for help with SEM investigations at Nanjing University of Posts and Telecommunications. Financial support from Science and technology support project of Jiangsu Province (BE2013101) is gratefully acknowledged.

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Authors and Affiliations

  1. Research Institute, Sinopec Yangzi Petrochemical Co., Ltd., Nanjing, 210048, China

    Jingwei Liu, Wenbin Du, Zezhuang Li & Aiwu Yang

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  1. Jingwei Liu
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  2. Wenbin Du
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  3. Zezhuang Li
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  4. Aiwu Yang
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Correspondence to Jingwei Liu.

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Liu, J., Du, W., Li, Z. et al. Preparation of TiO2 Nanotube Supported Pd for the Hydrogenation of 4-carboxy-benzaldehyde. Catal Lett 148, 2472–2479 (2018). https://doi.org/10.1007/s10562-018-2469-2

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  • DOI: https://doi.org/10.1007/s10562-018-2469-2

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