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Article: Hydrothermal synthesis of platinum-group-metal nanoparticles by using HEPES as a reductant and stabilizer
| Title | Hydrothermal synthesis of platinum-group-metal nanoparticles by using HEPES as a reductant and stabilizer | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Authors | |||||||||
| Keywords | HEPES buffer Hydrothermal synthesis Nanoparticles Platinum-group metals Supported catalysts | ||||||||
| Issue Date | 2010 | ||||||||
| Publisher | Wiley - V C H Verlag GmbH & Co. KGaA. The Journal's web site is located at http://www.wiley-vch.de/publish/en/journals/alphabeticIndex/2451 | ||||||||
| Citation | Chemistry - An Asian Journal, 2010, v. 5 n. 6, p. 1322-1331 How to Cite? | ||||||||
| Abstract | Platinum-group-metal (Ru, Os, Rh, Ir, Pd and Pt) nanoparticles are synthesized in an aqueous buffer solution of 4-(2-hydroxyethyl)-1-piper- azineethanesulfonic acid (HEPES) (200 mM, pH 7.4) under hydrothermal conditions (180 °C). Monodispersed (monodispersity: 11-15%) metal nanoparticles were obtained with an average particle size of less than 5 nm (Ru: 1.8±0.2, Os: 1.6±0.2, Rh: 4.5 ±0.5, Ir: 2.0±0.3, Pd: 3.8±0.4, Pt: 1.9±0.2 nm). The size, monodispersity, and stability of the as-obtained metal nanoparticles were affected by the HEPES concentration, pH of the HEPES buffer solution, and reaction temperature. HEPES with two tertiary amines (pi- perazine groups) and terminal hydroxyl groups can act as a reductant and stabilizer. The HEPES molecules can bind to the surface of metal nanoparticles to prevent metal nanoparticles from aggregation. These platinum- group-metal nanoparticles could be deposited onto the surface of graphite, which catalyzed the aerobic oxidation of alcohols to aldehydes. © 2010 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. | ||||||||
| Persistent Identifier | http://hdl.handle.net/10722/134714 | ||||||||
| ISSN | 2023 Impact Factor: 3.5 2023 SCImago Journal Rankings: 0.846 | ||||||||
| ISI Accession Number ID |
Funding Information: This work was supported by the Innovation and Technology Fund (ITS/189/08), University Development Fund, and the Hong Kong Research Grants Council (HKU 1/CRF/08 and CityU 2/06C). We thank Dr. Y. Liu for his helpful discussions and translation of the abstract from English to the traditional Chinese language. We offer our heartfelt thanks to F. Yu-Fee Chan and W.-S. Lee of the Electron Microscope Unit of the University of Hong Kong for their technical assistance. | ||||||||
| References | |||||||||
| Grants |
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | So, MH | en_HK |
| dc.contributor.author | Ho, CM | en_HK |
| dc.contributor.author | Chen, R | en_HK |
| dc.contributor.author | Che, CM | en_HK |
| dc.date.accessioned | 2011-07-08T06:46:32Z | - |
| dc.date.available | 2011-07-08T06:46:32Z | - |
| dc.date.issued | 2010 | en_HK |
| dc.identifier.citation | Chemistry - An Asian Journal, 2010, v. 5 n. 6, p. 1322-1331 | en_HK |
| dc.identifier.issn | 1861-4728 | en_HK |
| dc.identifier.uri | http://hdl.handle.net/10722/134714 | - |
| dc.description.abstract | Platinum-group-metal (Ru, Os, Rh, Ir, Pd and Pt) nanoparticles are synthesized in an aqueous buffer solution of 4-(2-hydroxyethyl)-1-piper- azineethanesulfonic acid (HEPES) (200 mM, pH 7.4) under hydrothermal conditions (180 °C). Monodispersed (monodispersity: 11-15%) metal nanoparticles were obtained with an average particle size of less than 5 nm (Ru: 1.8±0.2, Os: 1.6±0.2, Rh: 4.5 ±0.5, Ir: 2.0±0.3, Pd: 3.8±0.4, Pt: 1.9±0.2 nm). The size, monodispersity, and stability of the as-obtained metal nanoparticles were affected by the HEPES concentration, pH of the HEPES buffer solution, and reaction temperature. HEPES with two tertiary amines (pi- perazine groups) and terminal hydroxyl groups can act as a reductant and stabilizer. The HEPES molecules can bind to the surface of metal nanoparticles to prevent metal nanoparticles from aggregation. These platinum- group-metal nanoparticles could be deposited onto the surface of graphite, which catalyzed the aerobic oxidation of alcohols to aldehydes. © 2010 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. | en_HK |
| dc.language | eng | - |
| dc.publisher | Wiley - V C H Verlag GmbH & Co. KGaA. The Journal's web site is located at http://www.wiley-vch.de/publish/en/journals/alphabeticIndex/2451 | en_HK |
| dc.relation.ispartof | Chemistry - An Asian Journal | en_HK |
| dc.subject | HEPES buffer | en_HK |
| dc.subject | Hydrothermal synthesis | en_HK |
| dc.subject | Nanoparticles | en_HK |
| dc.subject | Platinum-group metals | en_HK |
| dc.subject | Supported catalysts | en_HK |
| dc.subject.mesh | Catalysis | - |
| dc.subject.mesh | HEPES - chemistry | - |
| dc.subject.mesh | Metal Nanoparticles - chemistry | - |
| dc.subject.mesh | Metals, Heavy - chemical synthesis - chemistry | - |
| dc.subject.mesh | Platinum - chemistry | - |
| dc.title | Hydrothermal synthesis of platinum-group-metal nanoparticles by using HEPES as a reductant and stabilizer | en_HK |
| dc.type | Article | en_HK |
| dc.identifier.openurl | http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1861-4728&volume=5&issue=6&spage=1322&epage=1331&date=2010&atitle=Hydrothermal+synthesis+of+platinum-group-metal+nanoparticles+by+using+HEPES+as+a+reductant+and+stabilizer | - |
| dc.identifier.email | Ho, CM: rickyho@hkucc.hku.hk | en_HK |
| dc.identifier.email | Che, CM: cmche@hku.hk | en_HK |
| dc.identifier.authority | Ho, CM=rp00705 | en_HK |
| dc.identifier.authority | Che, CM=rp00670 | en_HK |
| dc.description.nature | link_to_subscribed_fulltext | - |
| dc.identifier.doi | 10.1002/asia.201000066 | en_HK |
| dc.identifier.pmid | 20512785 | - |
| dc.identifier.scopus | eid_2-s2.0-77952914719 | en_HK |
| dc.identifier.hkuros | 173059 | - |
| dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-77952914719&selection=ref&src=s&origin=recordpage | en_HK |
| dc.identifier.volume | 5 | en_HK |
| dc.identifier.issue | 6 | en_HK |
| dc.identifier.spage | 1322 | en_HK |
| dc.identifier.epage | 1331 | en_HK |
| dc.identifier.isi | WOS:000278840200010 | - |
| dc.publisher.place | Germany | en_HK |
| dc.relation.project | Green Oxidation Chemistry and Technology | - |
| dc.relation.project | Green Chemistry. Application of Nanotechnology in the Development of Highly Efficient and Environmental Friendly Chemical Synthesis. | - |
| dc.identifier.scopusauthorid | So, MH=9275915300 | en_HK |
| dc.identifier.scopusauthorid | Ho, CM=12807243800 | en_HK |
| dc.identifier.scopusauthorid | Chen, R=9275915200 | en_HK |
| dc.identifier.scopusauthorid | Che, CM=7102442791 | en_HK |
| dc.identifier.issnl | 1861-471X | - |