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Selective dissolution to synthesize densely populated Pt single atom catalyst

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Abstract

Single atom catalysts (SACs) have become one of research focuses in heterogeneous catalysis for their effective utilization of active metal atoms and unique properties in various catalytic reactions. However, due to their high surface energy, noble metal single atoms like Pt tend to migrate and agglomerate to form larger clusters or nanoparticles, which makes it a challenge to fabricate noble metal SACs with high loading (> 5 wt.%). Furthermore, the decisive factors of loading maximum are still not clear. Here, we reported a manganese oxide supported Pt SAC with a high loading of 5.6 wt.% synthesized by selective dissolution strategy. The pre-stabilization of Pt by coordinated oxygen and the abundant surface defects of support are the determinants of high loading. The Pt SAC exhibited much better H2 spill-over and hydrocarbon oxidation abilities with lower adsorption and dissociation energies than the manganese oxide support because of its local electronic structure with less repulsion.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 21936005), the Natural Science Foundation of Beijing (No. 8202028), and China Petrochemical Corporation Funding (Sinopec Group, No. 321094). We thank Prof. Zhiying Cheng, and Shengsheng Liu from National Center for Electron Microscopy in Beijing, for the collection and interpretation of the HAADF-STEM images. We also thank Dr. Xiyang Wang from University of Waterloo for the fitting and analysis of XAFS data.

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  1. Weinan Yang and Xiaoguang Zhao contributed equally to this work.

Authors and Affiliations

  1. State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China

    Weinan Yang, Ya Wang, Rong Wang, Wenhao Yang, Yue Peng & Junhua Li

  2. Sinopec Research Institute of Petroleum Processing, Beijing, 100083, China

    Xiaoguang Zhao

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  1. Weinan Yang
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  2. Xiaoguang Zhao
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  3. Ya Wang
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  5. Wenhao Yang
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  7. Junhua Li
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Correspondence to Yue Peng or Junhua Li.

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Yang, W., Zhao, X., Wang, Y. et al. Selective dissolution to synthesize densely populated Pt single atom catalyst. Nano Res. 16, 219–227 (2023). https://doi.org/10.1007/s12274-022-4690-y

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