Non defect-stabilized thermally stable single-atom catalyst
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Xi, Wei
Liu, Jin-Cheng
Cui, Yi-Tao
Li, Tianbo
Lee, Adam Fraser
Chen, Fang
Chen, Yang
Li, Lei
Li, Lin
Lin, Jian
Miao, Shu
Liu, Xiaoyan
Wang, Ai-Qin
Wang, Xiaodong
et al.
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Abstract
Surface-supported isolated atoms in single-atom catalysts (SACs) are usually stabilized by diverse defects. The fabrication of high-metal-loading and thermally stable SACs remains a formidable challenge due to the difficulty of creating high densities of underpinning stable defects. Here we report that isolated Pt atoms can be stabilized through a strong covalent metal-support interaction (CMSI) that is not associated with support defects, yielding a high-loading and thermally stable SAC by trapping either the already deposited Pt atoms or the PtO2 units vaporized from nanoparticles during high-temperature calcination. Experimental and computational modeling studies reveal that iron oxide reducibility is crucial to anchor isolated Pt atoms. The resulting high concentrations of single atoms enable specific activities far exceeding those of conventional nanoparticle catalysts. This non defect-stabilization strategy can be extended to non-reducible supports by simply doping with iron oxide, thus paving a new way for constructing high-loading SACs for diverse industrially important catalytic reactions.
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Nature Communications
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10
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© The Author(s) 2019. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
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Analytical chemistry
Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
LOW-TEMPERATURE
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Lang, R; Xi, W; Liu, J-C; Cui, Y-T; Li, T; Lee, AF; Chen, F; Chen, Y; Li, L; Li, L; Lin, J; Miao, S; Liu, X; Wang, A-Q; Wang, X; et al., Non defect-stabilized thermally stable single-atom catalyst, Nature Communications, 2019, 10, pp. 234