Optimizing CuO on 3D Ordered Macroporous CeO <sub>2</sub> for CO Oxidation in Rich Hydrogen
ABSTRACT CO preferential oxidation (CO‐PROX) in rich H 2 is considered a feasible strategy to solve CO poisoning for fuel cells, but obtaining good activity at low temperatures is still a challenge. Herein, three‐dimensional ordered macroporous (3DOM) CuO/CeO 2 catalysts were fabricated by a templating approach, with the metal–support interaction (MSI) adjusted through active metal loading. The 10CuO/CeO 2 catalyst achieves complete CO conversion at 110°C and demonstrates excellent stability. Characterization studies have shown that the 10CuO/CeO 2 catalyst has abundant active sites and oxygen vacancies; this phenomenon could potentially be attributed to the synergistic effects arising from the MSI between CuO and CeO 2 . Moreover, in situ diffuse reflectance infrared Fourier transform spectra (in situ DRIFTS) were used to identify the intermediates and confirm that appropriate MSI enhances CO adsorption and activation. The findings of this study make significant contributions to the advancement of 3DOM CuO/CeO 2 catalysts for CO‐PROX and establish a promising strategy for optimizing the MSI in supported catalyst systems.
Authors
- Guoqiang Song (ORCID: https://orcid.org/0000-0002-4985-7318)
- X. Chen
- Lei Gong (ORCID: https://orcid.org/0000-0003-3288-1810)
- Claudia Li (ORCID: https://orcid.org/0000-0002-1113-5926)
- Feiyang Hu
- Fangfei Liyan
- Wenxia Zhou
- Sibudjing Kawi
Institutions
- National University of Singapore (SG)
- Nanchang Normal University (CN)
- Jiangxi Agricultural University (CN)
Publication Details
- Journal
- Rare Metals
- Published
- 2025-12-27
- DOI
- https://doi.org/10.1002/rar2.70115
- Citations
- 1
- Primary Topic
- Catalytic Processes in Materials Science
- Type
- article
- Field-Weighted Citation Impact
- 0.52
Funders
- National Research Foundation
- National Research Foundation Singapore
- National Natural Science Foundation of China