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PdCx nanocrystals with tunable compositions for alkyne semihydrogenation

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Abstract

The palladium carbide (PdCx) material has shown great promise as an efficient catalyst for alkyne semihydrogenation. Difficulties in preparing stable PdCx catalysts have been recognized as the main obstacle. Here, we synthesized a highly stable and durable class of PdCx nanocrystals by treating pre-formed Pd nanocrystals with glucose under hydrothermal conditions. The C/Pd atomic ratios in the resultant PdCx nanocrystals can be varied from 0.04 to 0.18, simply by changing the reaction time. The catalytic results for semihydrogenation of 4-ethynyl-1,1′-biphenyl show that PdC0.18 nanocrystals exhibit an activity with a turnover frequency as high as 7896 h−1, ∼7.6 and ∼38 times higher than that of commercial Pd/C and Lindlar catalysts, respectively, as well as a selectivity of >99%.

Graphical abstract: PdCx nanocrystals with tunable compositions for alkyne semihydrogenation

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Publication details

The article was received on 12 Dec 2018, accepted on 01 Feb 2019 and first published on 01 Feb 2019


Article type: Paper
DOI: 10.1039/C8TA12002A
Citation: J. Mater. Chem. A, 2019, Advance Article

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    PdCx nanocrystals with tunable compositions for alkyne semihydrogenation

    R. Guo, Q. Chen, X. Li, Y. Liu, C. Wang, W. Bi, C. Zhao, Y. Guo and M. Jin, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C8TA12002A

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