Two-dimensional crystalline platinum oxide
Platinum (Pt) oxides are vital catalysts in numerous reactions, but research indicates that they decompose at high temperatures, limiting their use in high-temperature applications. In this study, we identify a two-dimensional (2D) crystalline Pt oxide with remarkable thermal stability (1,200 K under nitrogen dioxide) using a suite of in situ methods. This 2D Pt oxide, characterized by a honeycomb lattice of Pt atoms encased between dual oxygen layers forming a six-pointed star structure, exhibits minimized in-plane stress and enhanced vertical bonding due to its unique structure, as revealed by theoretical simulations. These features contribute to its high thermal stability. Multiscale in situ observations trace the formation of this 2D Pt oxide from α-PtO<sub>2</sub>, providing insights into its formation mechanism from the atomic to the millimetre scale. This 2D Pt oxide with outstanding thermal stability and distinct surface electronic structure subverts the previously held notion that Pt oxides do not exist at high temperatures and can also present unique catalytic capabilities. This work expands our understanding of Pt oxidation species and sheds light on the oxidative and catalytic behaviours of Pt oxide in high-temperature settings.
Authors
- P. Hu (ORCID: https://orcid.org/0000-0002-6318-1051)
- Chaowu Xue
- Tian Qin (ORCID: https://orcid.org/0000-0002-2856-4743)
- Meixiao Wang
- Kaihui Liu (ORCID: https://orcid.org/0000-0002-8781-2495)
- Yuxiong Hu
- Zhongkai Liu (ORCID: https://orcid.org/0000-0003-3373-8039)
- Wujun Shi (ORCID: https://orcid.org/0000-0003-4541-9086)
- Marc‐Georg Willinger (ORCID: https://orcid.org/0000-0002-9996-7953)
- Jian Liu (ORCID: https://orcid.org/0000-0001-9576-3948)
- Yijing Zang
- Liyang Wei (ORCID: https://orcid.org/0000-0001-8759-3889)
- Zhaoxi Chen (ORCID: https://orcid.org/0000-0001-8598-152X)
- Hui Zhang (ORCID: https://orcid.org/0000-0002-1719-4345)
- Xi Liu (ORCID: https://orcid.org/0000-0002-8654-0774)
- Zhi Liu (ORCID: https://orcid.org/0000-0002-8973-6561)
- Zhu‐Jun Wang (ORCID: https://orcid.org/0000-0002-8227-7323)
- Bo Yang (ORCID: https://orcid.org/0000-0001-6904-6646)
- Jun Cai (ORCID: https://orcid.org/0000-0002-3806-7230)
- Liwei Chen (ORCID: https://orcid.org/0000-0003-4160-9771)
Institutions
- Shanghai Jiao Tong University (CN)
- Chinese Academy of Sciences (CN)
- Peking University (CN)
- ShanghaiTech University (CN)
- Shanghai Advanced Research Institute (CN)
- Technical University of Munich (DE)
Publication Details
- Journal
- Nature Materials
- Published
- 2024-09-19
- DOI
- https://doi.org/10.1038/s41563-024-02002-y
- Citations
- 20
- Primary Topic
- Catalytic Processes in Materials Science
- Type
- article
- Field-Weighted Citation Impact
- 2.34
Funders
- National Natural Science Foundation of China
- Science and Technology Commission of Shanghai Municipality
- ShanghaiTech University
- Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences