論文

2020年1月8日

Ligand-Functionalization-Controlled Activity of Metal-Organic Framework-Encapsulated Pt Nanocatalyst toward Activation of Water

Nano Letters
  • Naoki Ogiwara
  • ,
  • Hirokazu Kobayashi
  • ,
  • Munehiro Inukai
  • ,
  • Yusuke Nishiyama
  • ,
  • Patricia Concepción
  • ,
  • Fernando Rey
  • ,
  • Hiroshi Kitagawa

20
1
開始ページ
426
終了ページ
432
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/acs.nanolett.9b04124

Copyright © 2019 American Chemical Society. We first report the systematic control of the reactivity of H2O vapor in metal-organic frameworks (MOFs) with Pt nanocrystals (NCs) through ligand functionalization. We successfully synthesized Pt NCs covered with a water-stable MOF, UiO-66 (Pt@UiO-66), having different metal ions or functionalized ligands. The ligand functionalization of UiO-66 significantly affected the catalytic performance of the water-gas shift reaction, and the replacement of Zr4+ ions with Hf4+ ions in UiO-66 had no impact on the catalytic activity. The introduction of a -Br group lowered the reactivity of Pt@UiO-66 by nearly half, whereas the substitution of -Br with a -Me2 group triply enhanced the activity. The origin of the enhanced catalytic activity was found to be the change in H2O activity in the UiO-66 pores by the ligand functionalization, which was investigated using H2O sorption, solid-state NMR, X-ray photoelectron spectroscopy, and in situ IR measurements. This work opens a new prospect to develop MOFs as a platform to activate H2O.

リンク情報
DOI
https://doi.org/10.1021/acs.nanolett.9b04124
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/31833371
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85076887015&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85076887015&origin=inward

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