Details

Autor(en) / Beteiligte

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

Titel

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

Ist Teil von

• Applied catalysis. A, General, 2024-05, Vol.678, Article 119720

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2024

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• 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. [Display omitted] •Co-Co/Al oxide interaction is enhanced with increasing calcination temperature.•Optimized Co0-Co2+ synergy can be achieved with moderate Co-Co/Al oxide interaction.•Optimized Co0-Co2+ synergy leads to enhanced CO2 hydrogenation activity.