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Instruments / Technical Area	Publication Details	Published	Actions
B07-C-Versatile Soft X-ray beamline: Ambient Pressure XPS and NEXAFS E01-JEM ARM 200CF I09-Surface and Interface Structural Analysis I20-EDE-Energy Dispersive EXAFS (EDE) I20-Scanning-X-ray spectroscopy (XAS/XES)	Subsurface single-atom catalyst enabled by mechanochemical synthesis for oxidation chemistry Xuze Guan , Rong Han , Hiroyuki Asakura , Bolun Wang , Lu Chen , Jay Hon Cheung Yan , Shaoliang Guan , Luke Keenan , Shusaku Hayama , Matthijs A. Van Spronsen , Georg Held , Jie Zhang , Hao Gu , Yifei Ren , Lun Zhang , Zhangyi Yao , Yujiang Zhu , Anna Regoutz , Tsunehiro Tanaka , Yuzheng Guo , Feng Ryan Wang Angewandte Chemie International Edition DOI: 10.1002/anie.202410457 Diamond Proposal Number(s): [23759, 24450, 29092, 31852] Open Access Show Abstract ▼ Abstract: Single-atom catalysts have garnered significant attention due to their exceptional atom utilization and unique properties. However, the practical application of these catalysts is often impeded by challenges such as sintering-induced instability and poisoning of isolated atoms due to strong gas adsorption. In this study, we employed the mechanochemical method to insert single Cu atoms into the subsurface of Fe2O3 support. By manipulating the location of single atoms at the surface or subsurface, catalysts with distinct adsorption properties and reaction mechanisms can be achieved. It was observed that the subsurface Cu single atoms in Fe2O3 remained isolated under both oxidation and reduction environments, whereas surface Cu single atoms on Fe2O3 experienced sintering under reduction conditions. The unique properties of these subsurface single-atom catalysts call for innovations and new understandings in catalyst design.	Jul 2024

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