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Enhancement of the activity of Pd/C catalysts in aqueous phase hydrodechlorination through doping of carbon supports

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Abstract

The enhancement of the activity of Pd catalysts for aqueous phase hydrodechlorination (HDC) was studied using N-doped tailored supports. N-Doped (1–1.7 wt% N) and non-doped mesoporous carbon materials with equivalent pore structures were prepared via templating with MSU-F silica. At 30 °C, doping of the support resulted in a higher catalytic activity (26 vs. 49 mmol g−1 Pd min−1 for non-doped and doped supports, respectively) in the removal of 4-chlorophenol from water. However, the activity of the catalyst with non-doped carbon supports increased more with reaction temperature, even being the most active at 70 °C (131 vs. 102 mmol g−1 Pd min−1 for non-doped and doped supports, respectively). The activation energy of the process was found to decrease from 32 to 16 kJ mol−1 due to nitrogen doping of the support. Nitrogen doping of the carbon support is an interesting strategy to prepare catalysts with high HDC activity under mild temperature conditions, whereas non-doped supports are more convenient for the intensification of the process by increasing the reaction temperature.

Graphical abstract: Enhancement of the activity of Pd/C catalysts in aqueous phase hydrodechlorination through doping of carbon supports

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Publication details

The article was received on 22 Feb 2018, accepted on 08 Apr 2018 and first published on 09 Apr 2018


Article type: Paper
DOI: 10.1039/C8CY00384J
Citation: Catal. Sci. Technol., 2018, Advance Article
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    Enhancement of the activity of Pd/C catalysts in aqueous phase hydrodechlorination through doping of carbon supports

    C. Ruiz-García, F. Heras, N. Alonso-Morales, L. Calvo, J. J. Rodriguez and M. A. Gilarranz, Catal. Sci. Technol., 2018, Advance Article , DOI: 10.1039/C8CY00384J

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