Site Blocking with Gold Adatoms as an Approach to Study Structural Effects in Electrocatalysis | Sciact - CRIS-system of Boreskov Institute of Catalysis

Site Blocking with Gold Adatoms as an Approach to Study Structural Effects in Electrocatalysis Full article

Journal

Electrocatalysis
ISSN: 1868-2529 , E-ISSN: 1868-5994

Output data

Year: 2012, Volume: 3, Number: 3, Pages: 211-220 Pages count : 10 DOI: 10.1007/s12678-012-0104-3

Tags

ATR-SEIRAS, Au adatom deposition, CO dosing, CO electrooxidation, Electrodeposited Pt, Nanostructured Pt, Site blocking

Authors

Kuznetsov Aleksey N. ^1,2 , Zaikovskii Vladimir I. ² , Parmon Valentin N. ² , Savinova Elena R. ^1,3,4

Affiliations

1	Laboratory of Materials, Surfaces and Processes for Catalysis (LMSPC), UMR 7515 CNRS-UdS-ECPM, 25 rue Becquerel, F 67087 Strasbourg, France
2	Boreskov Institute of Catalysis, pr. Akademika Lavrentieva 5, Novosibirsk 630090, Russia
3	Ertl Center for Electrochemistry and Catalysis, GIST, Gwangju, South Korea
4	International Center for Frontier Research in Chemistry, University of Strasbourg, Strasbourg, France

Funding (1)

The French National Research Agency

ANR06CEXC00401

In this paper, we apply the site blocking approach for studying structural effects in electrocatalysis. We utilize gold as a site blocking element and investigate the CO monolayer oxidation as a model structure-sensitive surface reaction on nanostructured electrodes prepared by Pt electrodeposition. The evolution of the hydrogen UPD with the gold coverage suggests that Au adatoms sequentially block (100) terraces and steps, then (110) steps, and finally (111) facets. This leads to a systematic shift of the CO-stripping peaks towards positive potentials. Investigation of the carbon monoxide dosing in situ with infrared spectroscopy provides information on the influence of Au adatoms on the formation of COads adlayers. We conclude that an exceptionally high activity of nanostructured Pt electrodes prepared by electrodeposition results from the presence of low-coordinated defect sites which are presumably located at the emergence of grain boundaries at the surface. These defects on the one hand serve as active sites for the formation of active oxygen-containing adsorbates, and on the other hand prevent formation of densely packed CO islands.

Kuznetsov A.N. , Zaikovskii V.I. , Parmon V.N. , Savinova E.R.
Site Blocking with Gold Adatoms as an Approach to Study Structural Effects in Electrocatalysis
Electrocatalysis. 2012. V.3. N3. P.211-220. DOI: 10.1007/s12678-012-0104-3 WOS Scopus РИНЦ ANCAN OpenAlex

Published online:	Jun 29, 2012
Published print:	Dec 1, 2012

Web of science:	WOS:000312634100008
Scopus:	2-s2.0-84871271580
Elibrary:	20487800
Chemical Abstracts:	2012:1846876
Chemical Abstracts (print):	158:430529
OpenAlex:	W2045571042

DB	Citing
Web of science	8
Scopus	9
Elibrary	9
OpenAlex	9