Pyrochlore/Al2O3 composites supported Pd for the selective synthesis of cyclopentanones from biobased furfurals

Rui Gao, Xiang Li, Lingyun Guo, Zhikun Tong, Qiang Deng, Jun Wang, Zheling Zeng, Ji Jun Zou, Shuguang Deng

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Designing a bifunctional catalyst with both highly selective C[dbnd]O hydrogenation ability and Lewis acid-catalyzed ring-rearrangement ability is highly important for the synthesis of the cyclopentanone motifs from furfural derivatives. Herein, a class of pyrochlore/Al2O3 composites (2.68 wt%Y2(Sn0.65Al0.35)2O7-δ/Al2O3, 7.74 wt%Y2(Sn0.65Al0.35)2O7-δ/Al2O3) with a onefold Lewis acidity and rich oxygen defects were synthesized via a dissolution-precipitation method. After the impregnation by Pd nanoparticles, the oxygen defect of pyrochlore/Al2O3 shows a bifunctional effect: they can adsorb C[dbnd]O, promoting the selective C[dbnd]O hydrogenation step and can enhance the accessibility of coordinatively unsaturated metal ions, providing Lewis acidic sites for the ring-rearrangement step. The composite-based catalysts show noticeably higher hydrogenation and hydrolysis rates than their corresponding single metal oxide-based catalysts (Pd/Al2O3, Pd/Y2Sn2O7). Finally, 7.74 wt%Y2(Sn0.65Al0.35)2O7-δ/Al2O3 shows a cyclopentanone yield of 98.1 % and a 3-hydroxymethyl cyclopentanone yield of 90.6 %. ATR-IR results verify the catalytic mechanism and emphasize the importance of oxygen defects.

Original languageEnglish (US)
Article number117985
JournalApplied Catalysis A: General
Volume612
DOIs
StatePublished - Feb 25 2021

Keywords

  • C[dbnd]O hydrogenation catalysis
  • Cyclopentanone motifs
  • Furfural derivatives
  • Lewis acid catalysis
  • Pd/pyrochlore/AlO composites

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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