open access

https://hdl.handle.net/2115/94751

Uniformly Distributed Palladium Nanoparticles on NH2-MIL-53 Fabricated by an Equilibrium Adsorption Method for Reduction of Nitrite in Water

英語

High metal loading

2024-04-07

Wiley-Blackwell

ChemCatChem

16(16)

e202400315

Metal particle on a support material should be small and homogeneous in size, which is desirable when using it as a catalyst. In this study, we investigated to introduce Pd nanoparticles (NPs) with narrow size distribution into NH2-MIL-53, which was prepared by the reaction of aluminum(III) nitrate with 2-aminoterephthalic acid. Only by immersing it in an aqueous PdCl2 solution, followed by the reduction with NaBH4, Pd NPs of about 2 nm with unform distribution were formed in NH2-MIL-53 up to 3.5 wt.% Pd loadings. Amino group on the linkers in NH2-MIL-53 played a critical role for the introduction of (PdCl3)(-) as a precursor for Pd NPs, while no Pd was introduced into MIL-53 without amino group. The obtained catalysts (Pd@NH2-MIL-53) showed high catalytic performance for reduction of nitrite in water. The specific activity per Pd site exposed on the surface changed greatly depending on the Pd loadings despite the size of Pd NPs unchanged. Pd@NH2-MIL-53 with low Pd loadings showed higher specific activity (TOF=2.9x10(2) h(-1)), which might be due to the preferential exposure of Pd(111) facet on Pd NPs.

学術雑誌論文

Accepted Manuscript

This is the peer reviewed version of the following article: [Yuan Huang, Dr. Wontae Kim, Prof. Dr. Ryoichi Otomo, Shuhei Shimoda, Prof. Dr. Kevin C.-W. Wu, Prof. Dr. Yuichi Kamiya, ChemCatChem 2024 Volume16 Issue16, e202400315] which has been published in final form at https://doi.org/10.1002/cctc.202400315. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

1867-3880

1867-3899