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Abstract
A molecularly rigid polyamine based on a polymer of intrinsic microporosity (PIM-EA-TB) is shown to capture and stabilize platinum nanoparticles during colloid synthesis in the rigid framework. Stabilization here refers to avoiding aggregation without loss of surface reactivity. In the resulting rigid framework with embedded platinum nanoparticles, the volume ratio of platinum to PIM-EA-TB in starting materials is varied systematically from approximately 1.0 to 0.1 with the resulting platinum nanoparticle diameter varying from approximately 4.2 to 3.1 nm, respectively. Elemental analysis suggests that only a fraction of the polymer is "captured" to give nanocomposites rich in platinum. A transition occurs from electrically conducting and electrochemically active (with shorter average interparticle distance) to nonconducting and only partially electrochemically active (with longer average interparticle distance) polymer-platinum composites. The conducting nanoparticle network in the porous rigid macromolecular framework could be beneficial in electrocatalysis and in sensing applications.
Original language | English |
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Pages (from-to) | 22425-22430 |
Number of pages | 6 |
Journal | ACS Applied Materials and Interfaces |
Volume | 8 |
Issue number | 34 |
DOIs | |
Publication status | Published - 31 Aug 2016 |
Keywords
- electrocatalysis
- fuel cells
- membrane
- percolation
- stabilization
- tunneling
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Dive into the research topics of 'Molecularly rigid microporous polyamine captures and stabilizes conducting platinum nanoparticle networks'. Together they form a unique fingerprint.Projects
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Equipment
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MC2-Electron Microscopy (EM)
Material and Chemical Characterisation (MC2)Facility/equipment: Technology type
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MC2- X-ray diffraction (XRD)
Material and Chemical Characterisation (MC2)Facility/equipment: Technology type