Significant Reduction in Adsorption Energy of CO on Platinum Clusters on Graphite

被引：25

作者：

Oh, Junepyo ^{[1
]}

Kondo, Takahiro ^{[1
]}

Hatake, Daigo ^{[1
]}

Iwasaki, Yosuke ^{[1
]}

Honma, Yujiro ^{[1
]}

Suda, Yoshiyuki ^{[2
]}

Sekiba, Daiichiro ^{[3
,4
]}

Kudo, Hiroshi ^{[3
,4
]}

Nakamura, Junji ^{[1
]}

机构：

[1] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058573, Japan

[2] Toyohashi Univ Technol, Dept Elect & Elect Engn, Tempaku Ku, Aichi 4418580, Japan

[3] Univ Tsukuba, Res Facil Ctr Sci & Technol, Tsukuba, Ibaraki 3058573, Japan

[4] Univ Tsukuba, Inst Appl Phys, Tsukuba, Ibaraki 3058573, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2010年 / 1卷 / 02期

关键词：

FTIR SPECTROSCOPY; CARBON NANOTUBES; CATALYST; CHEMISORPTION; REACTIVITY; SUPPORT; HEATS;

D O I：

10.1021/jz900158y

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have studied desorption of CO on a Pt-deposited highly oriented pyrolytic graphite (HOPG) surface by temperature programmed desorption of CO (CO-TPD), scanning tunneling microscope (STM), and He atoms scattering (HAS). A desorption peak of CO at a significantly lower temperature of similar to 270 K with a heating rate of 0.5 K/s is observed for Pt clusters on a flat terrace of HOPG. STM results indicate that the height of Pt clusters on the terraces of the HOPG surface is monatomic. It is concluded that the significant reduction in CO adsorption energy is due to a modified electronic structure as a result of the interface interaction between Pt clusters and the HOPG surface.

引用

页码：463 / 466

页数：4

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