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Single Cr atom catalytic growth of graphene
Soochow Univ, Peoples R China; Polish Acad Sci, Poland.
Soochow Univ, Peoples R China.
Soochow Univ, Peoples R China.
IFW Dresden, Germany.
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2018 (English)In: Nano Reseach, ISSN 1998-0124, E-ISSN 1998-0000, Vol. 11, no 5, p. 2405-2411Article in journal (Refereed) Published
Abstract [en]

Single atoms are the ultimate minimum size limit for catalysts. Graphene, as an exciting, ultimately thin (one atom thick) material can be imaged in a transmission electron microscope with relatively few imaging artefacts. Here, we directly observe the behavior of single Cr atoms in graphene mono- and di-vacancies and, more importantly, at graphene edges. Similar studies at graphene edges with other elemental atoms, with the exception of Fe, show catalytic etching of graphene. Fe atoms have been shown to both etch and grow graphene. In contrast, Cr atoms are only observed to induce graphene growth. Complementary theoretical calculations illuminate the differences between Fe and Cr, and confirm single Cr atoms as superior catalysts for sp(2) carbon growth.

Place, publisher, year, edition, pages
TSINGHUA UNIV PRESS , 2018. Vol. 11, no 5, p. 2405-2411
Keywords [en]
in situ transmission electron microscope (TEM); electron driven catalysis; Cr; single atom; graphene synthesis
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-148259DOI: 10.1007/s12274-017-1861-3ISI: 000431999700008OAI: oai:DiVA.org:liu-148259DiVA, id: diva2:1213358
Note

Funding Agencies|National Natural Science Foundation of China [51672181]; National Science Center [2014/13/D/ST5/02853, 2015/19/B/ST5/03399]; Soochow University

Available from: 2018-06-04 Created: 2018-06-04 Last updated: 2018-06-04

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