CO2 hydrogenation to methanol on tungsten-doped Cu/CeO2 catalysts

The catalytic hydrogenation of CO2 to methanol depends significantly on the structures of metal-oxide interfaces. We show that doping a high-valency metal, viz. tungsten, to CeO2 could render improved catalytic activity for the hydrogenation of CO2 on a Cu/CeW0.25Ox catalyst, whilst making it more s...

Full description

Saved in:
Bibliographic Details
Published in:Applied catalysis. B, Environmental Environmental, 2022-06, Vol.306, p.121098, Article 121098
Main Authors: Yan, Yong, Wong, Roong Jien, Ma, Zhirui, Donat, Felix, Xi, Shibo, Saqline, Syed, Fan, Qianwenhao, Du, Yonghua, Borgna, Armando, He, Qian, Müller, Christoph R., Chen, Wei, Lapkin, Alexei A., Liu, Wen
Format: Article
Language:English
Subjects:
Carbon dioxide
Catalysts
Catalytic activity
Ceria
Cerium oxides
CO2
Copper
Doping
Hydrogenation
Interfaces
Metal oxides
Metal-support interface
Methanol
Oxygen
Oxygen vacancy
Structure-function relationships
Tungsten
Vacancies
Valency
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The catalytic hydrogenation of CO2 to methanol depends significantly on the structures of metal-oxide interfaces. We show that doping a high-valency metal, viz. tungsten, to CeO2 could render improved catalytic activity for the hydrogenation of CO2 on a Cu/CeW0.25Ox catalyst, whilst making it more selective towards methanol than the undoped Cu/CeO2. We experimentally investigated and elucidated the structural-functional relationship of the Cu/CeO2 interface for CO2 hydrogenation. The promotional effects are attributed to the irreversible reduction of Ce4+ to Ce3+ by W-doping, the suppression of the formation of redox-active oxygen vacancies on CeO2, and the activation of the formate pathway for CO2 hydrogenation. This catalyst design strategy differs fundamentally from those commonly used for CeO2-supported catalysts, in which oxygen vacancies with high redox activity are considered desirable. [Display omitted] •Cu/CeW0.25Ox shows a 10-fold boost in methanol space-time yield compared to Cu/CeO2.•Cu/CeW0.25Ox shows an improved methanol selectivity of 87% over the 51% of Cu/CeO2.•W-doping reduces CeO2 and produces large amount of stabile Ce3+ species.•W-doping activates the formate pathway on Cu/CeW0.25Ox.•Cu/CeW0.25Ox shows stable performance over 72 h time-on-stream.
ISSN:0926-3373
1873-3883
DOI:10.1016/j.apcatb.2022.121098