Sulfur promoted Pt/SiO 2 catalyzed cross-coupling of anilines and amines

Ken Ichi Shimizu, Katsuya Shimura, Naoko Tamagawa, Masazumi Tamura, Atsushi Satsuma

研究成果: Article査読

7 被引用数 (Scopus)

抄録

Pt/SiO 2 (Pt = 5 wt%) catalysts with average Pt particle size of 3.3 and 6.8 nm and sulfur-loaded Pt/SiO 2 (S/Pt ratio = 0.1 and 0.13; Pt size = 5.2 and 5.5 nm), prepared by adding ammonium sulfate on Pt/SiO 2 followed by H 2-reduction at 500 °C, are tested for mono-N-alkylation of aniline with di-iso-propylamine. The turnover frequency (TOF), defined as the reaction rate per number of surface Pt species, increases with sulfur loading. The catalyst with S/Pt ratio of 0.13 shows more than 5 times higher TOF than unmodified catalysts, and it acts as effective and recyclable catalyst for cross-coupling of various anilines and amines. Combined with kinetic results and characterizations, XAFS (X-ray absorption fine structure), TEM, and CO adsorption IR, a possible reason for the promotion effect of sulfur species (probably sulfidic species) is discussed.

本文言語English
ページ(範囲)37-42
ページ数6
ジャーナルApplied Catalysis A: General
417-418
DOI
出版ステータスPublished - 2012 2月 29

ASJC Scopus subject areas

  • 触媒
  • プロセス化学およびプロセス工学

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