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Hydrogen Electrooxidation over Palladium–Gold Alloy: Effect of Pretreatment in Ethylene on Catalytic Activity and CO Tolerance Full article

Общее Language: Английский, Genre: Full article,
Status: Published, Source type: Original
Journal Electrochimica Acta
ISSN: 0013-4686 , E-ISSN: 1873-3859
Output data Year: 2012, Volume: 76, Pages: 344-353 Pages count : 10 DOI: 10.1016/j.electacta.2012.05.043
Tags CO tolerance, Hydrogen electrooxidation, Interstitial carbon, Palladium-gold alloy
Authors Simonov Alexander N. 1 , Plyusnin Pavel E. 2,3 , Shubin Yuty V. 2,3 , Kvon Ren I. 1 , Korenev Sergey V. 2,3 , Parmon Valentin N. 1,3
Affiliations
1 Boreskov Institute of Catalysis of Siberian Branch of Russian Academy of Sciences, Prospekt Akademika Lavrentieva, 5, Novosibirsk 630090, Russia
2 Nikolayev Institute of Inorganic Chemistry of Siberian Branch of Russian Academy of Sciences, Prospekt Akademika Lavrentieva, 3, Novosibirsk 630090, Russia
3 Novosibirsk State University, Pirogova Street, 2, Novosibirsk 630090, Russia

Funding (3)

1 Council for Grants of the President of the Russian Federation НШ-524.2012.3
2 Council for Grants of the President of the Russian Federation МК-380.2011.3
3 Russian Foundation for Basic Research 11-03-00668

Abstract: Palladium gold alloy powder (PdAu2) was synthesized by reduction of the [Pd(NH3)4][AuCl4]2 complex with H2 at 90 ◦C, and then was additionally heated in a C2H4 (PdAu2–Cx) or H2 flow (PdAu2–H2) at 300 ◦C. The samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy and by a set of electrochemical methods. The Pd:Au ratio on the surface of the PdAu2 alloy suffers marginal changes after heating under C2H4 atmosphere, and decreases as a result of heating in a H2 flow. Hydrogen oxidation reaction (HOR) over the catalysts was studied using rotating disk electrode at 25 ◦C in 0.1 M HClO4 in pure H2 and in the presence of 1100 ppm of CO. Heat-treatment of the PdAu2 alloy under H2 does not improve its HOR activity and CO tolerance (normalized to Pd and total metal surface area), while the PdAu2–Cx catalyst exhibits substantially enhanced catalytic performance in the HOR both in the absence and in the presence of CO as compared to the parent PdAu2 alloy. The enhanced activity of the C2H4-treated PdAu2 alloy is explained by the promoting action of carbon atoms incorporated into the alloy structure during treatment under C2H4 atmosphere. This supposition is approved by the fact that mild oxidative treatment of the PdAu2–Cx sample degrades notably its catalytic activity.
Cite: Simonov A.N. , Plyusnin P.E. , Shubin Y.V. , Kvon R.I. , Korenev S.V. , Parmon V.N.
Hydrogen Electrooxidation over Palladium–Gold Alloy: Effect of Pretreatment in Ethylene on Catalytic Activity and CO Tolerance
Electrochimica Acta. 2012. V.76. P.344-353. DOI: 10.1016/j.electacta.2012.05.043 publication_identifier_short.wos_identifier_type publication_identifier_short.scopus_identifier_type publication_identifier_short.rinz_identifier_type
Dates:
Submitted: Feb 17, 2012
Accepted: May 9, 2012
Published online: May 17, 2012
Published print: Aug 1, 2012
Identifiers:
publication_identifier.wos_identifier_type WOS:000306621200045
publication_identifier.scopus_identifier_type 2-s2.0-84862980156
publication_identifier.rinz_identifier_type 20472332
publication_identifier.accession_number_identifier_type 2012:939823
publication_identifier.chemical_accession_number_identifier_type 157:146921
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