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Thermally-stable single-site Pd on CeO2 catalyst for selective amination of phenols to aromatic amines without external hydrogen.
Wang, Yaqin; Chen, Bingfeng; Li, Lina; Mei, Xuelei; Gu, Yucheng; Wu, Haihong; He, Mingyuan; Han, Buxing.
Afiliação
  • Wang Y; East China Normal University, School of Chemistry of Molecular Engineering, CHINA.
  • Chen B; Chinese Academy of Sciences, Institute of Chemistry, CHINA.
  • Li L; Shanghai Advanced Research Institute, Shanghai Synchrotron Radiation Facility, CHINA.
  • Mei X; East China Normal University, School of Chemistry of Molecular Engineering, CHINA.
  • Gu Y; Syngenta Jealott's Hill International Research Centre, Bracknell RG 42 6EY, UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND.
  • Wu H; East China Normal University, School of Chemistry of Molecular Engineering, CHINA.
  • He M; East China Normal University, School of Chemistry of Molecular Engineering, CHINA.
  • Han B; Institute of Chemistry Chinese Academy of Sciences, Institute of chemistry, Beiyijie number 2, Zhongguancun, 100190, Beijing, CHINA.
Angew Chem Int Ed Engl ; : e202412062, 2024 Sep 24.
Article em En | MEDLINE | ID: mdl-39315608
ABSTRACT
Developing a new route to produce aromatic amines as key chemicals from renewable phenols is a benign alternative to current fossil-based routes like nitroaromatic hydrogenation, but is challenging because of the high dissociation energy of the Ar-OH bond and difficulty in controlling side reactions. Herein, an aerosolizing-pyrolysis strategy was developed to prepare high-density single-site cationic Pd species immobilized on CeO2 (Pd1/CeO2) with excellent sintering resistance. The obtained Pd1/CeO2 catalysts achieved remarkable selectivity of important aromatic amines (yield up to 76.2%) in the phenols amination with amines without external hydrogen sources, while Pd nano-catalysts mainly afforded phenyl-ring-saturation products. The excellent catalytic properties of the Pd1/CeO2 are closely related to high-loading Pd single-site catalysts with abundant surface defect sites and suitable acid-base properties. This report provides a sustainable route for producing aromatic amines from renewable feedstocks.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article