Surface reduced CeO2 nanowires for direct conversion of CO2 and methanol to dimethyl carbonate: Catalytic performance and role of oxygen vacancy

Zhongwei Fu, Yuehong Yu, Zhen Li, Dongmei Han, Shuanjin Wang, Min Xiao, Yuezhong Meng

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Ultralong 1D CeO2 nanowires were synthesized via an advanced solvothermal method, surface reduced under H2 atmosphere, and first applied in direct synthesis of dimethyl carbonate (DMC) from CO2 and CH3OH. The micro morphologies, physical parameters of nanowires were fully investigated by transmission electron microscopy (TEM), X-ray diffraction (XRD), N2 adsorption, X-ray photoelectron spectrum (XPS), and temperature-programmed desorption of ammonia/carbon dioxide (NH3-TPD/CO2-TPD). The effects of surface oxygen vacancy and acidic/alkaline sites on the catalytic activity was explored. After reduction, the acidic/alkaline sites of CeO2 nanowires can be dramatically improved and evidently raised the catalytic performance. CeO2 nanowires reduced at 500 ° C (CeO2_NW_500) exhibited notably superior activity with DMC yield of 16.85 mmol gcat -1. Furthermore, kinetic insights of initial rate were carried out and the apparent activation energy barrier of CeO2_NW_500 catalyst was found to be 41.9 kJ/mol, much tiny than that of CeO2_NW catalyst (74.7 KJ/mol).
Original languageEnglish (US)
JournalCatalysts
Volume8
Issue number4
DOIs
StatePublished - Apr 19 2018
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-09-20

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Catalysis

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