Following a series of advances in the study of graphene growth mechanism and large-scale graphene structure determination (ChemComm 47, 2011, 1470; Nat Commun 3, 2012, 699), State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences The nano- and interface research group directly observed the surface reaction process in the two-dimensional confinement space formed between the single-layer graphene and the metal surface by means of a self-developed deep ultraviolet laser light emission electron microscope (DUV-PEEM). The reaction kinetics of these processes were determined. This result was recently accepted by the German Applied Chemistry. In the in-situ dynamic surface study of graphene epitaxial growth on metal surfaces, the research group led by Dahua Institute and Academician and Fu Qiang researcher has realized the controllable growth of graphene structure from nanometer to millimeter size. Through the study of the process of atomic and molecular intercalation in the two-dimensional space formed at the interface of graphene/metal, the controlled growth of single-layer structure at the interface was successfully realized. Recent studies have found that a limited catalytic reaction can occur in a two-dimensional nanospace formed between graphene and a metal surface. Reactive molecules such as CO and O2 molecules can be intercalated under the graphene surface, and the introduction of intercalated molecules leads to changes in the graphene/metal interfacial structure and can be observed using PEEM/LEEM. Therefore, single-layer graphene has a developmental effect on the underlying chemical processes, enabling scientists to use surface imaging techniques such as LEEM/PEEM to achieve in situ studies of monoatomic layer reactions in confined states, such as CO adsorption desorption. Reaction, CO oxidation reaction, etc., and can clearly observe the significant confinement effect of single-layer graphene on the chemical processes occurring under its surface. This result indicates that in-situ dynamic studies can be carried out in the fields of heterogeneous catalysis and surface nanostructure growth by utilizing the unique spatial resolution and chemical resolution of deep ultraviolet PEEM/LEEM. Relevant research has been supported by the Ministry of Finance, the National Natural Science Foundation of China, the Chinese Academy of Sciences “Hundred Talents Program†and the Ministry of Science and Technology.
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