Electrocatalytic Behavior of Pd and Pt Nanoislands Deposited onto 4,4′-Dithiodipyridine SAMs on Au(111)

被引：11

作者：

Muller, Heiko ^{[1
]}

Metzler, Martin ^{[1
]}

Barth, Natalie ^{[1
]}

Conings, Bert ^{[2
]}

Boyen, Hans-Gerd ^{[2
]}

Jacob, Timo ^{[1
]}

Kibler, Ludwig A. ^{[1
]}

机构：

[1] Univ Ulm, Inst Elektrochem, D-89069 Ulm, Germany

[2] Hasselt Univ, Inst Mat Res IMO IMOMEC, B-3590 Diepenbeek, Belgium

来源：

ELECTROCATALYSIS | 2018年 / 9卷 / 04期

关键词：

Electrocatalysis; Self-assembled monolayers; Metallization; CO oxidation; Methanol oxidation; SELF-ASSEMBLED MONOLAYERS; THIOL-COVERED GOLD; MOLECULAR ELECTRONICS; METAL-DEPOSITION; 4-MERCAPTOPYRIDINE; METALLIZATION; ADSORPTION; ELECTROCHEMISTRY; INTERFACES; OXIDATION;

D O I：

10.1007/s12678-018-0467-1

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：

Using different electrochemical techniques as well as in situ scanning tunneling microscopy (STM) and ultraviolet photoelectron spectroscopy (UPS), we investigated the electrocatalytic oxidation of carbon monoxide and methanol on palladium and on platinum nanoislands, which were deposited onto 4,4'-dithiodipyridine self-assembled monolayers (SAMs) on Au(111) single crystal electrodes. Electrochemical and morphological measurements performed on these monoatomic high metal deposits on top of the SAM show rather different island growth along with variations in metal coverage and particle size. UPS He-II valence band spectra of all Pt deposits reveal no intensity at the Fermi energy, so that the resulting nanoislands can be considered as non-metallic. While the electronic and structural properties do not affect carbon monoxide adsorption, the metal coverage has a tremendous impact on the catalytic activity regarding CO oxidation as well as methanol oxidation.

引用

页码：505 / 513

页数：9

共 41 条

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