Reaction Stoichiometry and Mechanism of Pt Deposition via Surface Limited Redox Replacement of Copper UPD Layer on Au(111)

被引：8

作者：

Yuan, Qiuyi ^{[1
]}

Wakisakai, Yuki ^{[1
]}

Uemura, Yohei ^{[2
]}

Wada, Takahiro ^{[3
]}

Ariga-Miwa, Hiroko ^{[1
]}

Takakusagi, Satoru ^{[1
]}

Asakura, Kiyotaka ^{[1
]}

Brankovic, Stanko R. ^{[4
]}

机构：

[1] Hokkaido Univ, Intitute Catalysis, Kita Ku, Kita 21 Nishi 10, Sapporo, Hokkaido 0010021, Japan

[2] Inst Mol Sci, Okazaki, Aichi 4440867, Japan

[3] Tokyo Med & Dent Univ, Bunkyo Ku, 1-5-45 Yushima, Tokyo 1138549, Japan

[4] Univ Houston, Dept Elect & Comp Engn, Houston, TX 77204 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2018年 / 122卷 / 29期

关键词：

X-RAY-ABSORPTION; OXYGEN-REDUCTION; MONOLAYER ELECTROCATALYSTS; REACTION-KINETICS; METAL-DEPOSITION; FINE-STRUCTURE; E-ALD; PLATINUM; GROWTH; GOLD;

D O I：

10.1021/acs.jpcc.8b02218

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：

The stoichiometry and reaction mechanism of Pt deposition via surface limited redox replacement (SLRR) of Cu underpotential-deposited (UPD) monolayer on Au(111) was studied using in situ polarization dependent total reflection fluorescence X-ray absorption fine structure (PTRF-XAFS), scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry (CV). We proposed that Pt deposition via SLRR of Cu UPD monolayer leads to formation/deposition of Pt-surface species mainly consisting of Pt(II) chloride with a square planar local structure [PtCl4] parallel to the Au surface (60%) which has a strong interaction of the Pt complex with the Au substrate. The rest (40%) was one-monolayer Pt metal cluster. This result provides a new understanding into the mechanism and stoichiometry of the SLRR reaction, which has a wide application for synthesis of monolayer catalysts.

引用

页码：16664 / 16673

页数：10