NDLI: Electrodeposited Pd Sub-Monolayers on Carbon-Supported Au Particles of Few Nanometers in Size: Electrocatalytic Activity for Hydrogen Oxidation and CO Tolerance Vs. Pd Coverage

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Electrodeposited Pd Sub-Monolayers on Carbon-Supported Au Particles of Few Nanometers in Size: Electrocatalytic Activity for Hydrogen Oxidation and CO Tolerance Vs. Pd Coverage

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Electrocatalysis : Volume 3, Issue 1, March 2012

Electrocatalysis : Volume 2

Electrocatalysis : Volume 1

Electrodeposited Pd Sub-Monolayers on Carbon-Supported Au Particles of Few Nanometers in Size: Electrocatalytic Activity for Hydrogen Oxidation and CO Tolerance Vs. Pd Coverage

Content Provider	Springer Nature Link
Author	Simonov, Alexander N. Pyrjaev, Pavel A. Moroz, Boris L. Bukhtiyarov, Valery I. Parmon, Valentin N.
Copyright Year	2012
Abstract	A series of Pd–Au/C catalysts were obtained by selective electrodeposition of various amounts of Pd metal from a H$_{2}$PdCl$_{4}$ solution onto the carbon-supported Au nanoparticles (mainly below 5 nm in diameter) synthesized by “cationic adsorption” technique. The catalytic performance of the Pd–Au particles with both the clean and carbon monoxide (CO)-blocked surfaces for the hydrogen oxidation reaction (HOR) at 25 and 60 °C was tested as a function of the Pd coverage (θ $_{Pd}$) expressed in effective monolayer (ML) units, using a rotating disk electrode (RDE). The RDE studies demonstrate superior HOR activity (per unit of Pd surface area) of Pd deposited at the submonolayer level (θ $_{Pd}$ < 0.65 ML) onto the finely dispersed Au particles in comparison to those observed for the low-dispersed Pd–Au/C catalysts described earlier by other authors and for the monometallic Pd particles. The dependencies of the HOR activity and CO tolerance of the finely dispersed Pd–Au particles on their surface composition are discussed in terms of occurrence of various Pd sites on the surface of bimetallic particles differing in their ability to catalyze HOR and adsorb CO. The relative contribution of various factors to the rise of CO tolerance observed for Pd deposited on Au at varying θ $_{Pd}$ was estimated by comparison of the HOR activities measured with the fresh and CO-poisoned Pd–Au/C catalysts.
Starting Page	119
Ending Page	131
Page Count	13
File Format	PDF
ISSN	18682529
Journal	Electrocatalysis
Volume Number	3
Issue Number	2
e-ISSN	18685994
Language	English
Publisher	Springer US
Publisher Date	2012-02-25
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Palladium sub-monolayers Gold nanoparticles Carbon support Hydrogen electrooxidation CO tolerance Physical Chemistry Catalysis Energy Technology Electrochemistry
Content Type	Text
Resource Type	Article
Subject	Electrochemistry

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