Confinement of Ultrasmall Cobalt Oxide Clusters within Silicalite-1 Crystals for Efficient Conversion of Fructose into Methyl Lactate

Yue Yan, Zihao Zhang, Seong Min Bak, Siyu Yao, Xiaobing Hu, Zulipiya Shadike, Chi Linh Do-Thanh, Feng Zhang, Hao Chen, Xilei Lyu, Kequan Chen, Yimei Zhu, Xiuyang Lu, Pingkai Ouyang, Jie Fu*, Sheng Dai

*Corresponding author for this work

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Chemocatalysis of sugars to methyl lactate (MLA) exhibits great advantages over the conventional fermentation approach because of its higher productivity and cost-effective separation process. However, widely used supported metal oxide catalysts suffer from deactivation resulting from sintering during the reaction and removal of coke at high temperatures. Herein, we report ultrasmall cobalt oxide clusters (∼1.7 nm) stabilized within silicalite-1 crystals catalyst (CoO@silicalite-1), exhibiting superior catalytic activity and resistance to sintering for the conversion of fructose into methyl lactate. HAADF-STEM, EDS-mapping, and XRD experiments identify the existence of confined CoO clusters. XANES and Raman spectra demonstrated the covalent interaction between CoO and silicalite-1. Thanks to the ultrasmall CoO particle size (∼1.7 nm), the CoO@silicalite-1 affords nearly 100-fold higher Co-mass-based activity (mg MLA/mg Co) compared with CoO or Co 3 O 4 particles outside the silicalite-1 framework. More importantly, this catalyst exhibits good reuse performance via the removal of coke with facile calcination.

Original languageEnglish (US)
Pages (from-to)1923-1930
Number of pages8
JournalACS Catalysis
Volume9
Issue number3
DOIs
StatePublished - Mar 1 2019

Keywords

  • biomass conversion
  • cobalt oxide clusters
  • methyl lactate
  • silicalite-1
  • sinter-resistance

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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    Yan, Y., Zhang, Z., Bak, S. M., Yao, S., Hu, X., Shadike, Z., Do-Thanh, C. L., Zhang, F., Chen, H., Lyu, X., Chen, K., Zhu, Y., Lu, X., Ouyang, P., Fu, J., & Dai, S. (2019). Confinement of Ultrasmall Cobalt Oxide Clusters within Silicalite-1 Crystals for Efficient Conversion of Fructose into Methyl Lactate. ACS Catalysis, 9(3), 1923-1930. https://doi.org/10.1021/acscatal.8b03230