Enhancing the Formation of C₂₊ Hydrocarbons in CO₂ Hydrogenation Through Co₂C/CeO_x Interactions.

Authors

Hui Gao, Miao Zhang, Zhiqun Wang, Rongtan Li, Na Liu, Yaowen Gu, Qiang Fu, Guanghui Zhang, Chunshan Song, Xinwen Guo

Published in

Angewandte Chemie (International ed. in English). Pages e2179385. Oct 13, 2026. Epub Oct 13, 2026.

Abstract

Cobalt carbide (Co₂C) shows promise for CO₂ hydrogenation to C₂₊ hydrocarbons via the CO₂-Fischer-Tropsch pathway, although the production rate is still limited by the slow CO hydrogenation step. Herein, we developed CeO_x-modified Co₂C catalysts. At a Co/Ce molar ratio of 99, the catalyst achieved a C₂₊ hydrocarbon space-time yield of 106 mmol g_cat ^-1 h^-1 at 35% CO₂ conversion (300°C, 3 MPa), outperforming all reported Co-based catalysts and comparable to some Fe-based catalysts. Characterizations and kinetic studies reveal that highly dispersed CeO_x interacts with Co, forming abundant and intimately contacted interfaces and effectively tuning the electronic structure of Co₂C. The Co₂C-CeO_x electronic interaction enhances CO adsorption and H₂ activation, accelerating the rate-determining CO hydrogenation and ultimately boosting C₂₊ hydrocarbon formation. This work provides a feasible strategy for designing efficient Co₂C-based catalysts for CO₂ hydrogenation.

PMID:
42865222
Bibliographic data and abstract were imported from PubMed on 13 Oct 2026.

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