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 language | English |
---|---|
Article number | 119720 |
Journal | Applied Catalysis A: General |
Volume | 678 |
DOIs | |
State | Published - 25 May 2024 |
Keywords
- CO hydrogenation
- Cobalt
- Interaction
- Synergy