首页|Confinement of Au, Pd and Pt nanoparticle with reduced sizes: Significant improvement of dispersion degree and catalytic activity

Confinement of Au, Pd and Pt nanoparticle with reduced sizes: Significant improvement of dispersion degree and catalytic activity

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  • NSTL
  • Elsevier
Heterogeneous catalytic reactions are strongly relying on metal-based catalysts due to their outstanding activity. However, the activity of catalysts depends on the size of metal nanoparticles (MNPs). Herein, Pd, Pt and Au NPs were confined in the nanoconfined spaces of template occluded as-made KIT-6 (AK) via facile single-step strategy. The metal precursors are directly inserted into the nanoconfined channels of AK by grinding. Subse-quent reduction removes template P123, decompose precursors and reduce MNPs in one step in comparison to multiple ones of traditional strategies. The results demonstrated that the nanoconfined channels between tem-plate and silica walls of AK where MNPs locate, MNPs interaction with AK and single-step strategy promote the formation of MNPs with smaller size. The characterization results confirmed uniform MNPs distribution with single metallic state without any metallic oxides. The smaller size of MNPs in catalysts endows excellent catalytic activity and the order of para-nitrophenol (p-NP) reduction to p-aminophenol (p-AP) and methylene blue (MB) to leucomethylene blue (LMB) is AK-Pd > AK-Pt > AK-Au. Also, the reaction rate constant of AK-Pd is much better than AK-Pt and AK-Au catalysts. Moreover, the synthesized catalysts exhibited good reusability and are highly promising for utilization in catalytic reactions.

As -made KIT-6Nanoconfined spacesMetal nanoparticlesFacile fabrication strategyCatalytic conversionsMETAL-ORGANIC FRAMEWORKMESOPOROUS SILICAPALLADIUM NANOPARTICLESPLATINUM NANOPARTICLESFACILE FABRICATIONSULFUR-COMPOUNDSREDUCTIONOXIDATIONSPACES4-NITROPHENOL

Subhan, Fazle、Aslam, Sobia、Yan, Zifeng、Yaseen, Muhammad、Naeem, Muhammad、Khan, Abbas

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Abdul Wali Khan Univ Mardan

China Univ Petr

Univ Peshawar

2022

10.1016/j.micromeso.2022.111927

Microporous and mesoporous materials

Microporous and mesoporous materials

EISCI
ISSN：1387-1811
年,卷(期)：2022.337
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