Preparation of PtNi Nanoparticles for the Electrocatalytic Oxidation of Methanol
Carbon supported PtNi nanoparticles were prepared by hydrazine reduction of Pt and Ni precursor salts under different conditions, namely by conventional heating (PtNi-1), by prolonged reaction at room temperature (PtNi-2) and by microwave assisted reduction (PtNi-3). The nanocomposites were characte...
| Main Authors: | , , |
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| Format: | Article |
| Language: | en_US |
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2003
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| Online Access: | http://hdl.handle.net/1721.1/3943 |
| _version_ | 1826199311725101056 |
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| author | Deivaraj, T.C. Chen, Wei Xiang Lee, Jim Yang |
| author_facet | Deivaraj, T.C. Chen, Wei Xiang Lee, Jim Yang |
| author_sort | Deivaraj, T.C. |
| collection | MIT |
| description | Carbon supported PtNi nanoparticles were prepared by hydrazine reduction of Pt and Ni precursor salts under different conditions, namely by conventional heating (PtNi-1), by prolonged reaction at room temperature (PtNi-2) and by microwave assisted reduction (PtNi-3). The nanocomposites were characterized by XRD, EDX, XPS and TEM and used as electrocatalysts in direct methanol fuel cell (DMFC) reactions. Investigations into the mechanism of PtNi nanoparticle formation revealed that platinum nanoparticle seeding was essential for the formation of the bimetallic nanoparticles. The average particle size of PtNi prepared by microwave irradiation was the lowest, in the range of 2.9 – 5.8 nm. The relative rates of electrooxidation of methanol at room temperature as measured by cyclic voltammetry showed an inverse relationship between catalytic activity and particle size in the following order PtNi-1 < PtNi-2 < PtNi-3. |
| first_indexed | 2024-09-23T11:17:50Z |
| format | Article |
| id | mit-1721.1/3943 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:17:50Z |
| publishDate | 2003 |
| record_format | dspace |
| spelling | mit-1721.1/39432019-04-10T08:59:16Z Preparation of PtNi Nanoparticles for the Electrocatalytic Oxidation of Methanol Deivaraj, T.C. Chen, Wei Xiang Lee, Jim Yang direct methanol fuel cells platinum nickel alloy nanoparticles microwave assisted synthesis electroxidation of methanol Carbon supported PtNi nanoparticles were prepared by hydrazine reduction of Pt and Ni precursor salts under different conditions, namely by conventional heating (PtNi-1), by prolonged reaction at room temperature (PtNi-2) and by microwave assisted reduction (PtNi-3). The nanocomposites were characterized by XRD, EDX, XPS and TEM and used as electrocatalysts in direct methanol fuel cell (DMFC) reactions. Investigations into the mechanism of PtNi nanoparticle formation revealed that platinum nanoparticle seeding was essential for the formation of the bimetallic nanoparticles. The average particle size of PtNi prepared by microwave irradiation was the lowest, in the range of 2.9 – 5.8 nm. The relative rates of electrooxidation of methanol at room temperature as measured by cyclic voltammetry showed an inverse relationship between catalytic activity and particle size in the following order PtNi-1 < PtNi-2 < PtNi-3. Singapore-MIT Alliance (SMA) 2003-12-16T14:13:18Z 2003-12-16T14:13:18Z 2004-01 Article http://hdl.handle.net/1721.1/3943 en_US Molecular Engineering of Biological and Chemical Systems (MEBCS); 753307 bytes application/pdf application/pdf |
| spellingShingle | direct methanol fuel cells platinum nickel alloy nanoparticles microwave assisted synthesis electroxidation of methanol Deivaraj, T.C. Chen, Wei Xiang Lee, Jim Yang Preparation of PtNi Nanoparticles for the Electrocatalytic Oxidation of Methanol |
| title | Preparation of PtNi Nanoparticles for the Electrocatalytic Oxidation of Methanol |
| title_full | Preparation of PtNi Nanoparticles for the Electrocatalytic Oxidation of Methanol |
| title_fullStr | Preparation of PtNi Nanoparticles for the Electrocatalytic Oxidation of Methanol |
| title_full_unstemmed | Preparation of PtNi Nanoparticles for the Electrocatalytic Oxidation of Methanol |
| title_short | Preparation of PtNi Nanoparticles for the Electrocatalytic Oxidation of Methanol |
| title_sort | preparation of ptni nanoparticles for the electrocatalytic oxidation of methanol |
| topic | direct methanol fuel cells platinum nickel alloy nanoparticles microwave assisted synthesis electroxidation of methanol |
| url | http://hdl.handle.net/1721.1/3943 |
| work_keys_str_mv | AT deivarajtc preparationofptninanoparticlesfortheelectrocatalyticoxidationofmethanol AT chenweixiang preparationofptninanoparticlesfortheelectrocatalyticoxidationofmethanol AT leejimyang preparationofptninanoparticlesfortheelectrocatalyticoxidationofmethanol |