Facile synthesis of the atomically dispersed hydrotalcite oxide supported copper catalysts for the selective hydrogenation of 5–hydroxymethylfurfural into 2,5-bis(hydroxymethyl)furan

Raju Kumar, Hsin Hui Lee, En Chen, Yuan Peng Du, Chan Yi Lin, Warot Prasanseang, Thanasak Solos, Kittisak Choojun, Tawan Sooknoi, Rui Kun Xie, Jyh Fu Lee, Po Wen Chung

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17 Scopus citations

Abstract

The selective hydrogenation of 5-hydroxymethylfurfural (HMF) to 2,5-bis(hydroxymethyl)furan (BHMF) using the atomically dispersed supported copper catalyst is investigated. The hydrotalcite oxide supported copper materials (Cu(x)HTO) are facilely prepared by coprecipitating metal precursors in a methanolic solution under a tuned pH. The surface characterization involving PXRD, TEM, H2/N2O-TPR, and XAS reveals unequivocal evidence for the presence of the atomically dispersed copper on HTO surface. XAS specifically indicates the formation of mononuclear copper species, and H2/N2O-TPR strongly supports the copper atoms of Cu(5)HTO are evenly distributed in 99% dispersion. Moreover, the reduced Cu(5)HTO (r-Cu(5)HTO) enables to completely hydrogenate HMF to BHMF under mild conditions, in comparison to the poor reactivity catalyzed by the hydrotalcite oxide supported copper nanoparticles (r-Cu(4)@HTO). The dramatic enhancement of HMF hydrogenation catalyzed by r-Cu(5)HTO can be attributed to the fine distribution of copper atoms which are situated homogeneously over HTO surface as well as chemically reactive for the carbonyl group.

Original languageEnglish
Article number122547
JournalApplied Catalysis B: Environmental
Volume329
DOIs
StatePublished - 15 Jul 2023

Keywords

  • 2
  • 5-bis(hydroxymethyl)furan
  • 5-hydroxymethylfurfural
  • Atomically dispersed hydrotalcite oxide supported copper catalyst
  • Selective hydrogenation

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