Simultaneously activating molecular oxygen and surface lattice oxygen on Pt/TiO2 for low-temperature CO oxidation
Developing high-performance Pt-based catalysts with low Pt loading is crucial but challenging for CO oxidation at temperatures below 100 °C. Herein, we report a Pt-based catalyst with only a 0.15 wt% Pt loading, which consists of Pt-Ti intermetallic single-atom alloy (ISAA) and Pt nanoparticles (NP) co-supported on a defective TiO<sub>2</sub> support, achieving a record high turnover frequency of 11.59 s<sup>-1</sup> at 80 °C and complete conversion of CO at 120 °C. This is because the coexistence of Pt-Ti ISAA and Pt NP significantly alleviates the competitive adsorption of CO and O<sub>2</sub>, enhancing the activation of O<sub>2</sub>. Furthermore, Pt single atom sites are stabilized by Pt-Ti ISAA, resulting in distortion of the TiO<sub>2</sub> lattice within Pt-Ti ISAA. This distortion activates the neighboring surface lattice oxygen, allowing for the simultaneous occurrence of the Mars-van Krevelen and Langmuir-Hinshelwood reaction paths at low temperatures.
Authors
- Jiajian Gao (ORCID: https://orcid.org/0000-0002-7507-3445)
- Qiao Hu
- Wenxing Chen (ORCID: https://orcid.org/0000-0001-9669-4358)
- Guokang Chen (ORCID: https://orcid.org/0009-0000-1859-7691)
- Yongjun Ji (ORCID: https://orcid.org/0000-0002-5781-0907)
- Peng Zheng (ORCID: https://orcid.org/0000-0003-4327-2308)
- Fabing Su (ORCID: https://orcid.org/0000-0002-5792-5843)
- Ziyi Zhong (ORCID: https://orcid.org/0000-0003-4964-0386)
- Guangwen Xu (ORCID: https://orcid.org/0000-0002-0025-3898)
- Tingyu Zhu (ORCID: https://orcid.org/0009-0004-8230-0337)
- Tengfei Zhang (ORCID: https://orcid.org/0000-0001-6317-484X)
- Xiaolong Liu (ORCID: https://orcid.org/0000-0003-1236-1332)
- Xi Liu (ORCID: https://orcid.org/0000-0002-8654-0774)
- Yang Zou (ORCID: https://orcid.org/0000-0001-7023-2868)
- Zhiyi Sun
- Junbo Tian (ORCID: https://orcid.org/0009-0005-7560-353X)
Institutions
- Agency for Science, Technology and Research (SG)
- Beijing Institute of Technology (CN)
- Beijing Technology and Business University (CN)
- Shanghai Jiao Tong University (CN)
- Beijing University of Technology (CN)
- Institute of Process Engineering (CN)
- Guangdong Technion-Israel Institute of Technology (CN)
- Shenyang University of Chemical Technology (CN)
Publication Details
- Journal
- Nature Communications
- Published
- 2024-08-09
- DOI
- https://doi.org/10.1038/s41467-024-50790-3
- Citations
- 99
- Primary Topic
- Catalytic Processes in Materials Science
- Type
- article
- Field-Weighted Citation Impact
- 11.60
Funders
- National Natural Science Foundation of China
- Anhui University
- Anhui University of Technology