AuCu@Pt Nanoalloys for Catalytic Application in Reduction of 4-Nitrophenol
To enhance and optimize nanocatalyst ability for nitrophenol (4-NP) reduction reaction we look beyond Au-metal nanoparticles and describe a new class of Au nanoalloys with controlled composition for core of AuCu-metals and Pt-metal shell. The reduction of 4-NP was investigated in aqueous media spect...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Journal of Spectroscopy |
| Online Access: | http://dx.doi.org/10.1155/2016/6210794 |
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| _version_ | 1832561409099038720 |
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| author | Sadia Mehmood Naveed Kausar Janjua Farhat Saira Hicham Fenniri |
| author_facet | Sadia Mehmood Naveed Kausar Janjua Farhat Saira Hicham Fenniri |
| author_sort | Sadia Mehmood |
| collection | DOAJ |
| description | To enhance and optimize nanocatalyst ability for nitrophenol (4-NP) reduction reaction we look beyond Au-metal nanoparticles and describe a new class of Au nanoalloys with controlled composition for core of AuCu-metals and Pt-metal shell. The reduction of 4-NP was investigated in aqueous media spectroscopically on 7.8 nm Au nanospheres (AuNSs), 8.3 nm AuCuNSs, and 9.1 nm AuCu@Pt core-shell NSs in diameter. The rate constants of the catalyzed reaction at room temperature, activation energies, and entropies of activation of reactions catalyzed by the AuCu@Pt core-shell NSs are found to have different values to those of the pure metal NSs. The results strongly support the proposal that catalysis by nanoparticles is taking place efficiently on the surface of NSs. These core-shell nanocatalysts exhibited stability throughout the reduction reaction and proved that heterogonous type mechanisms are most likely to be dominant in nanoalloy based catalysis if the surface of the NSs is not defected upon shell incorporation. |
| format | Article |
| id | doaj-art-19759d18a4824f4fbe760b5107ced13a |
| institution | Kabale University |
| issn | 2314-4920 2314-4939 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Spectroscopy |
| spelling | doaj-art-19759d18a4824f4fbe760b5107ced13a2025-02-03T01:25:03ZengWileyJournal of Spectroscopy2314-49202314-49392016-01-01201610.1155/2016/62107946210794AuCu@Pt Nanoalloys for Catalytic Application in Reduction of 4-NitrophenolSadia Mehmood0Naveed Kausar Janjua1Farhat Saira2Hicham Fenniri3Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, PakistanDepartment of Chemistry, Quaid-i-Azam University, Islamabad 45320, PakistanDepartment of Chemistry, Quaid-i-Azam University, Islamabad 45320, PakistanNational Institute for Nanotechnology and Department of Chemistry, University of Alberta, 11421 Saskatchewan Drive, Edmonton, AB, T6G 2M9, CanadaTo enhance and optimize nanocatalyst ability for nitrophenol (4-NP) reduction reaction we look beyond Au-metal nanoparticles and describe a new class of Au nanoalloys with controlled composition for core of AuCu-metals and Pt-metal shell. The reduction of 4-NP was investigated in aqueous media spectroscopically on 7.8 nm Au nanospheres (AuNSs), 8.3 nm AuCuNSs, and 9.1 nm AuCu@Pt core-shell NSs in diameter. The rate constants of the catalyzed reaction at room temperature, activation energies, and entropies of activation of reactions catalyzed by the AuCu@Pt core-shell NSs are found to have different values to those of the pure metal NSs. The results strongly support the proposal that catalysis by nanoparticles is taking place efficiently on the surface of NSs. These core-shell nanocatalysts exhibited stability throughout the reduction reaction and proved that heterogonous type mechanisms are most likely to be dominant in nanoalloy based catalysis if the surface of the NSs is not defected upon shell incorporation.http://dx.doi.org/10.1155/2016/6210794 |
| spellingShingle | Sadia Mehmood Naveed Kausar Janjua Farhat Saira Hicham Fenniri AuCu@Pt Nanoalloys for Catalytic Application in Reduction of 4-Nitrophenol Journal of Spectroscopy |
| title | AuCu@Pt Nanoalloys for Catalytic Application in Reduction of 4-Nitrophenol |
| title_full | AuCu@Pt Nanoalloys for Catalytic Application in Reduction of 4-Nitrophenol |
| title_fullStr | AuCu@Pt Nanoalloys for Catalytic Application in Reduction of 4-Nitrophenol |
| title_full_unstemmed | AuCu@Pt Nanoalloys for Catalytic Application in Reduction of 4-Nitrophenol |
| title_short | AuCu@Pt Nanoalloys for Catalytic Application in Reduction of 4-Nitrophenol |
| title_sort | aucu pt nanoalloys for catalytic application in reduction of 4 nitrophenol |
| url | http://dx.doi.org/10.1155/2016/6210794 |
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