Journal
ENERGY & FUELS
Volume 35, Issue 5, Pages 4358-4366Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.energyfuels.0c02952
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Funding
- Natural Science Foundation of Zhejiang Province of China [LQ20B030010]
- Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering [2017-K11]
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Two-dimensional metallic Pd nanosheets were synthesized via an ion-exchange method and exhibited higher catalytic activity compared to Pd nanoparticles in catalytic reactions.
Two-dimensional (2D) metallic Pd nanosheets were synthesized by an ion-exchange method using PdCl42- and magnesium- and aluminum-based metallic (LDH) as intercalation ion and host material, respectively. The LDH-supported Pd catalyst (Pd/LDH) presented two kinds of existing forms of Pd species comprising Pd nanosheets and nanoparticles. Characterizations by FT-IR spectra and HAADF-STEM images revealed that the Pd nanosheets were intercalated into the sandwich layer of hydrotalcite. The Pd/LDH catalyst was probed for the catalytic hydrogenation of nitrobenzene to aniline, and the Pd/LDH catalyst exhibited excellent catalytic activity with a high TOF value of 133.8 h(-1), much higher than that of 97.3 h(-1) on LDH-supported Pd nanoparticles catalyst. The results indicated that the catalytic activity of the formed Pd nanosheets was far higher than that of Pd nanoparticles. The edges of 2D Pd nanosheets, due to its negatively electronic property as well as unsaturated coordination, could be the main reason for the enhanced catalytic hydrogenation.
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