Ni/SiO2 catalysts derived from carbothermal reduction of nickel phyllosilicate in the hydrogenation of levulinic acid to γ-valerolactone: The efficacy of nitrogen decoration

Cheng Chia Li, Chou Hsun Hsieh, Yu Chuan Lin

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)

摘要

Ni catalysts derived from the carbothermal reduction of nickel phyllosilicate were investigated and their application in the hydrogenation of levulinic acid (LA) to γ-valerolactone (GVL) was revealed. The most effective catalyst (S3M1.5@NiPS-600) was prepared by using a sucrose-melamine mixture (molar ratio = 2:1) as the reducing agent with a proper thermal treatment (maintained at 600 °C for 2 h). By using S3M1.5@NiPS-600, a high GVL productivity (1387 mmol GVL/g surface Ni/h), good recyclability (4.9% loss of initial activity in five cycles), and a negligible deactivation rate were observed. The promising outcome was attributed to grafted carbon and nitrogen species on the carbothermally reduced Ni/SiO2 catalyst. Grafted carbon species improve catalyst stability whereas immobilized nitrogen species induce Niδ+ (δ>2) with a strong Lewis acidity. Paired Niδ+ and Ni0 sites are active in the reduction of the ketone group of LA, thereby enhancing the production of GVL.

原文English
文章編號111720
期刊Molecular Catalysis
DOIs
出版狀態Accepted/In press - 2021

All Science Journal Classification (ASJC) codes

  • 催化
  • 製程化學與技術
  • 物理與理論化學

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