Revisiting the Morphology-Dependent CO <sub>2</sub> Hydrogenation over Ru/CeO <sub>2</sub> Catalysts
The morphologies of CeO 2 nanocrystals significantly influence the Ru-catalyzed CO 2 hydrogenation. However, the morphology-dependent catalytic behaviors remain controversial and poorly understood. In this study, three shape-specific CeO 2 -supported Ru catalysts (cubes, polyhedra, and rods) were successfully synthesized, and then, the origin of morphology effects on Ru-catalyzed CO 2 hydrogenation was systematically investigated by means of ex situ/in situ characterizations. The cubic CeO 2 -supported Ru catalyst exhibited the highest CO 2 conversion rate and CH 4 selectivity. In situ DRIFTS revealed that CO 2 hydrogenation over Ru/CeO 2 proceeds via the formate and carbonyl routes, with the former being favored at lower temperatures. The detailed characterizations demonstrated that the morphology-dependent metal–support interaction (MSI) influences the chemical states of Ru species, thereby regulating the adsorption/activation of H 2 and the CO* intermediate, which ultimately determines the catalytic activity and selectivity in CO 2 hydrogenation. This study highlighted that the MSI strength, rather than oxygen vacancies, serves as a key descriptor governing the catalytic performance.
Authors
- Bingzhang Li (ORCID: https://orcid.org/0000-0001-5905-495X)
- Xicheng Zhang (ORCID: https://orcid.org/0000-0003-1004-021X)
- Xiaodong Wen (ORCID: https://orcid.org/0000-0001-5626-8581)
- Z Li
- Fangxian Cao
- Jianjun Chen (ORCID: https://orcid.org/0000-0001-9618-0365)
- Jiangping Liu (ORCID: https://orcid.org/0000-0003-2999-8575)
Institutions
- Kunming University of Science and Technology (CN)
- Northwestern Polytechnical University (CN)
- Institute of Coal Chemistry (CN)
- State Key Laboratory of Coal Conversion
Publication Details
- Journal
- ACS Catalysis
- Published
- 2026-06-30
- DOI
- https://doi.org/10.1021/acscatal.6c03659
- Primary Topic
- Catalysts for Methane Reforming
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Applied Basic Research Foundation of Yunnan Province
- Analysis and Testing Foundation of Kunming University of Science and Technology