Platinum monolayer electrocatalysts for oxygen reduction: Effect of substrates, and long-term stability
We describe a novel concept for a Pt monolayer electrocatalyst and present the results of our electrochemical, X-ray absorption spectroscopy, and scanning tunneling microscopy studies. The electrocatalysts were prepared by a new method for depositing Pt monolayers involving the galvanic displacement...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Serbian Chemical Society
2005-01-01
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| Series: | Journal of the Serbian Chemical Society |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0352-5139/2005/0352-51390503513Z.pdf |
| _version_ | 1818560143787294720 |
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| author | Zhang J. Vukmirović M.B. Sasaki K. Uribe F. Adžić R.R. |
| author_facet | Zhang J. Vukmirović M.B. Sasaki K. Uribe F. Adžić R.R. |
| author_sort | Zhang J. |
| collection | DOAJ |
| description | We describe a novel concept for a Pt monolayer electrocatalyst and present the results of our electrochemical, X-ray absorption spectroscopy, and scanning tunneling microscopy studies. The electrocatalysts were prepared by a new method for depositing Pt monolayers involving the galvanic displacement by Pt of an under potentially deposited Cu monolayer on substrates of Au (111), Ir(111), Pd(111), Rh(111) and Ru(0001) single crylstals, and Pd nanoparticles. The kinetics of O2 reduction showed significant enhancement with Pt monolayers on Pd(111) and Pd nanoparticle surfaces in comparisonwith the reaction on Pt(111) and Pt nanoparticles, respectively. This increase in catalytic activity is attributed partly to the decreased formation of PtOH, as shown by in situ X-ray absorption spectroscopy. The results illustrate that placing a Pt monolayer on a suitable substrate of metal nanoparticles is an attractive way of designing better O2 reduction electrocatalysts with very low Pt contents. |
| first_indexed | 2024-12-14T00:34:38Z |
| format | Article |
| id | doaj.art-b3afafd73b234cf0a94a7c078c5dd589 |
| institution | Directory Open Access Journal |
| issn | 0352-5139 1820-7421 |
| language | English |
| last_indexed | 2024-12-14T00:34:38Z |
| publishDate | 2005-01-01 |
| publisher | Serbian Chemical Society |
| record_format | Article |
| series | Journal of the Serbian Chemical Society |
| spelling | doaj.art-b3afafd73b234cf0a94a7c078c5dd5892022-12-21T23:24:42ZengSerbian Chemical SocietyJournal of the Serbian Chemical Society0352-51391820-74212005-01-0170351352510.2298/JSC0503513Z0352-51390503513ZPlatinum monolayer electrocatalysts for oxygen reduction: Effect of substrates, and long-term stabilityZhang J.0Vukmirović M.B.1Sasaki K.2Uribe F.3Adžić R.R.4Department of Materials Science - Brookhaven National Laboratory, Upton, NY, USADepartment of Materials Science - Brookhaven National Laboratory, Upton, NY, USADepartment of Materials Science - Brookhaven National Laboratory, Upton, NY, USALos Alamos National Laboratory, Los Alamos, USADepartment of Materials Science - Brookhaven National Laboratory, Upton, NY, USAWe describe a novel concept for a Pt monolayer electrocatalyst and present the results of our electrochemical, X-ray absorption spectroscopy, and scanning tunneling microscopy studies. The electrocatalysts were prepared by a new method for depositing Pt monolayers involving the galvanic displacement by Pt of an under potentially deposited Cu monolayer on substrates of Au (111), Ir(111), Pd(111), Rh(111) and Ru(0001) single crylstals, and Pd nanoparticles. The kinetics of O2 reduction showed significant enhancement with Pt monolayers on Pd(111) and Pd nanoparticle surfaces in comparisonwith the reaction on Pt(111) and Pt nanoparticles, respectively. This increase in catalytic activity is attributed partly to the decreased formation of PtOH, as shown by in situ X-ray absorption spectroscopy. The results illustrate that placing a Pt monolayer on a suitable substrate of metal nanoparticles is an attractive way of designing better O2 reduction electrocatalysts with very low Pt contents.http://www.doiserbia.nb.rs/img/doi/0352-5139/2005/0352-51390503513Z.pdfelectrocatalysisoxygen reductionplatinummonolayersstability |
| spellingShingle | Zhang J. Vukmirović M.B. Sasaki K. Uribe F. Adžić R.R. Platinum monolayer electrocatalysts for oxygen reduction: Effect of substrates, and long-term stability Journal of the Serbian Chemical Society electrocatalysis oxygen reduction platinum monolayers stability |
| title | Platinum monolayer electrocatalysts for oxygen reduction: Effect of substrates, and long-term stability |
| title_full | Platinum monolayer electrocatalysts for oxygen reduction: Effect of substrates, and long-term stability |
| title_fullStr | Platinum monolayer electrocatalysts for oxygen reduction: Effect of substrates, and long-term stability |
| title_full_unstemmed | Platinum monolayer electrocatalysts for oxygen reduction: Effect of substrates, and long-term stability |
| title_short | Platinum monolayer electrocatalysts for oxygen reduction: Effect of substrates, and long-term stability |
| title_sort | platinum monolayer electrocatalysts for oxygen reduction effect of substrates and long term stability |
| topic | electrocatalysis oxygen reduction platinum monolayers stability |
| url | http://www.doiserbia.nb.rs/img/doi/0352-5139/2005/0352-51390503513Z.pdf |
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