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Photochemical tuning of dynamic defects for high-performance atomically dispersed catalysts

Cited 1 time in Web of Science Cited 2 time in Scopus
Authors

Lee, Chan Woo; Lee, Byoung-Hoon; Park, Sunghak; Jung, Yoon; Han, Jaebeom; Heo, Junhyeok; Lee, Kangjae; Ko, Wonjae; Yoo, Seungwoo; Bootharaju, Megalamane S.; Ryu, Jaeyune; Nam, Ki Tae; Kim, Minho; Hyeon, Taeghwan

Issue Date
2024-04
Publisher
Nature Publishing Group
Citation
Nature Materials, Vol.23 No.4
Abstract
Developing active and stable atomically dispersed catalysts is challenging because of weak non-specific interactions between catalytically active metal atoms and supports. Here we demonstrate a general method for synthesizing atomically dispersed catalysts via photochemical defect tuning for controlling oxygen-vacancy dynamics, which can induce specific metal-support interactions. The developed synthesis method offers metal-dynamically stabilized atomic catalysts, and it can be applied to reducible metal oxides, including TiO2, ZnO and CeO2, containing various catalytically active transition metals, including Pt, Ir and Cu. The optimized Pt-DSA/TiO2 shows unprecedentedly high photocatalytic hydrogen evolution activity, producing 164 mmol g-1 h-1 with a turnover frequency of 1.27 s-1. Furthermore, it generates 42.2 mmol gsub-1 of hydrogen via a non-recyclable-plastic-photoreforming process, achieving a total conversion of 98%; this offers a promising solution for mitigating plastic waste and simultaneously producing valuable energy sources. Developing active and stable atomically dispersed catalysts is challenging because of weak non-specific interactions between catalytically active metal atoms and supports. A general method for synthesizing these catalysts via photochemical defect tuning for controlling oxygen-vacancy dynamics is proposed.
ISSN
1476-1122
URI
https://hdl.handle.net/10371/199010
DOI
https://doi.org/10.1038/s41563-024-01799-y
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  • College of Engineering
  • School of Chemical and Biological Engineering
Research Area Catalysis, Nano Materials, Physical E-Chem, 무기화학, 물리전기화학

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