Simultaneously activating molecular oxygen and surface lattice oxygen on Pt/TiO2 for low-temperature CO oxidation

Tengfei Zhang; Peng Zheng; Jiajian Gao; Xiaolong Liu; Yongjun Ji; Junbo Tian; Yang Zou; Zhiyi Sun; Qiao Hu; Guokang Chen; Wenxing Chen; Xi Liu; Ziyi Zhong; Guangwen Xu; Tingyu Zhu; Fabing Su

doi:10.1038/s41467-024-50790-3

Nature Communications (Aug 2024)

Simultaneously activating molecular oxygen and surface lattice oxygen on Pt/TiO2 for low-temperature CO oxidation

Tengfei Zhang,
Peng Zheng,
Jiajian Gao,
Xiaolong Liu,
Yongjun Ji,
Junbo Tian,
Yang Zou,
Zhiyi Sun,
Qiao Hu,
Guokang Chen,
Wenxing Chen,
Xi Liu,
Ziyi Zhong,
Guangwen Xu,
Tingyu Zhu,
Fabing Su

Affiliations

Tengfei Zhang: Institute of Process Engineering, Chinese Academy of Sciences
Peng Zheng: Key Laboratory on Resources Chemicals and Materials of Ministry of Education, Shenyang University of Chemical Technology
Jiajian Gao: Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR)
Xiaolong Liu: Institute of Process Engineering, Chinese Academy of Sciences
Yongjun Ji: School of Light Industry, Beijing Technology and Business University
Junbo Tian: Institute of Process Engineering, Chinese Academy of Sciences
Yang Zou: Institute of Process Engineering, Chinese Academy of Sciences
Zhiyi Sun: Energy & Catalysis Center, School of Materials Science and Engineering, Beijing Institute of Technology
Qiao Hu: School of Chemistry and Chemical Engineering, in situ Center for Physical Sciences, Shanghai Jiao Tong University
Guokang Chen: School of Chemistry and Chemical Engineering, in situ Center for Physical Sciences, Shanghai Jiao Tong University
Wenxing Chen: Energy & Catalysis Center, School of Materials Science and Engineering, Beijing Institute of Technology
Xi Liu: School of Chemistry and Chemical Engineering, in situ Center for Physical Sciences, Shanghai Jiao Tong University
Ziyi Zhong: Department of Chemical Engineering, and Guangdong Provincial Key Laboratory of Materials and Technologies for Energy Conversion (MATEC), Guangdong Technion Israel Institute of Technology (GTIIT)
Guangwen Xu: Key Laboratory on Resources Chemicals and Materials of Ministry of Education, Shenyang University of Chemical Technology
Tingyu Zhu: Institute of Process Engineering, Chinese Academy of Sciences
Fabing Su: Institute of Process Engineering, Chinese Academy of Sciences

DOI: https://doi.org/10.1038/s41467-024-50790-3
Journal volume & issue: Vol. 15, no. 1
pp. 1 – 12

Abstract

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Abstract 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 TiO2 support, achieving a record high turnover frequency of 11.59 s–1 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 O2, enhancing the activation of O2. Furthermore, Pt single atom sites are stabilized by Pt–Ti ISAA, resulting in distortion of the TiO2 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.

Published in Nature Communications

ISSN: 2041-1723 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Science
Website: https://www.nature.com/ncomms/

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