關鍵字查詢 | 類別:期刊論文 | | 關鍵字:Atomic Structure and Local Electronic States of Single Pt Atoms Dispersed on Graphene

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1 107/1 物理系 李啟正 助理教授 期刊論文 發佈 Atomic Structure and Local Electronic States of Single Pt Atoms Dispersed on Graphene , [107-1] :Atomic Structure and Local Electronic States of Single Pt Atoms Dispersed on Graphene期刊論文Atomic Structure and Local Electronic States of Single Pt Atoms Dispersed on GrapheneKenji Yamazaki, Yosuke Maehara, Chi-Cheng Lee, Jun Yoshinobu, Taisuke Ozaki, and Kazutoshi GoharaJ. Phys. Chem. C 122(48), p.27292-27300In single-atom catalysis, the atomic structure and local electronic states of single atoms on a supporting material remain a fundamental question. We experimentally and theoretically solved these problems for single Pt atoms dispersed on freestanding graphene using plasma sputtering. Electron microscopy revealed the atomic arrangements of Pt atoms binding to carbon atoms at the step edges of nanographene flakes. X-ray photoelectron spectroscopy revealed a large binding energy shift of the Pt 4f state of a single Pt atom. First-principles calculations elucidated that the Pt 5dxy-orbital in the step edge plays a crucial role in the formation of chemical bonds to C atoms and in the co
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