CO2 hydrogenation over CoAl based catalysts: Effects of cobalt-metal oxide interaction

Weijie Fu, Shuilian Liu, Yiming He, Jian Chen, Jie Ren, Huanhao Chen, Ruiyan Sun, Zhenchen Tang, Chalachew Mebrahtu, Feng Zeng

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The pivotal role of CO2 hydrogenation in mitigating emissions and generating value-added fuels and chemicals underscores the significance of catalysts in achieving high efficiency in this process. The influence of metal-metal oxide interactions on catalyst performance has been widely acknowledged. In this study, Co-metal oxide interaction is tailored by calcining a mixed CoAl hydroxide (i.e., CoAl layered double hydroxide and Al hydroxide) at different temperatures and subsequently explored its impact on CO2 hydrogenation. The findings reveal that a moderate Co-metal oxide interaction results in a balanced Co0-Co2+ synergy. This synergy, in turn, facilitates CO2 conversion through a HCOO route at the Co0-Co2+ interface, leading to elevated turnover frequencies for CO2 conversion and the production of methane with a selectivity surpassing 98%, while methanol and ethanol are generated as minor byproducts.

Original languageEnglish
Article number119720
JournalApplied Catalysis A: General
Volume678
DOIs
StatePublished - 25 May 2024

Keywords

  • CO hydrogenation
  • Cobalt
  • Interaction
  • Synergy

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