Issue 35, 2018

Replacement reaction-based synthesis of supported palladium catalysts with atomic dispersion for catalytic removal of benzene

Abstract

Increasing the dispersity of noble metals in transition metal oxides is an effective way to increase their activity and utilization for the catalytic removal of volatile organic compounds (VOCs). Herein, we report a strategy to combine the galvanic replacement reaction between copper (Cu) seeds and palladium (Pd) ions in an organic medium with a thermal treatment to produce supported Pd catalysts with atomic dispersion in CuO for the catalytic oxidation of benzene. This strategy involves the synthesis of Cu nanoseeds in oleylamine, the galvanic replacement reaction between Cu seeds and Pd2+ ions for forming bimetallic Cu–Pd nanoalloys, the deposition of Cu–Pd nanoalloys on γ-aluminum oxide (γ-Al2O3) substrates, and the subsequent thermal treatment for oxidizing the Cu component in the alloy particles. In particular, the catalytic evaluations show that after thermal treatment, the γ-Al2O3-supported Cu–Pd particles with a Pd/Cu ratio of 1/1 exhibit the best performance, while those with the Pd/Cu ratio of 0.2/1 have the best turnover frequency (TOF) for benzene conversion due to the interaction between Pd and CuO (formed by thermal treatment) and the high dispersity of Pd in CuO. The study in this work may provide a way to efficiently utilize the noble metals and offer a concept to design cost-effective and more active noble metal catalysts for the complete oxidation of VOCs.

Graphical abstract: Replacement reaction-based synthesis of supported palladium catalysts with atomic dispersion for catalytic removal of benzene

Supplementary files

Article information

Article type
Paper
Submitted
01 Jun 2018
Accepted
03 Aug 2018
First published
06 Aug 2018

J. Mater. Chem. A, 2018,6, 17032-17039

Replacement reaction-based synthesis of supported palladium catalysts with atomic dispersion for catalytic removal of benzene

L. Xu, D. Chen, J. Qu, L. Wang, J. Tang, H. Liu and J. Yang, J. Mater. Chem. A, 2018, 6, 17032 DOI: 10.1039/C8TA05159C

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