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Synthesis and characterization of platinum nanoparticle catalysts capped with isolated zinc species in SBA-15 cChannels : the wall effect
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Raine, Elizabeth, Clark, Adam H., Smales, Glen, Smith, Andrew, Gianolio, Diego, Li, Tong, Zheng, Jianwei, Griffith, Benjamin, Hyde, Tim I., Feaviour, Mark, Collier, Paul, Hanna, John V., Sankar, Gopinathan and Tsang, Shik Chi Edman (2018) Synthesis and characterization of platinum nanoparticle catalysts capped with isolated zinc species in SBA-15 cChannels : the wall effect. ACS Applied Nano Materials, 1 (12). pp. 6603-6612. doi:10.1021/acsanm.8b01357 ISSN 2574-0970.
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Official URL: http://dx.doi.org/10.1021/acsanm.8b01357
Abstract
The strong directing effects and difficulties in the removal of organic based surfactants makes the templated synthesis of nanoparticles in solid porous structures of defined molecular sizes such as SBA-15, without the use of surfactants, considerably attractive. However, the effects of their internal surface structures, adsorption affinities, and lattice mismatch on the particle morphology grown therein have not been fully appreciated. Here, we report the internal surface of the silica preferentially hosts isolated tetrahedrally coordinated oxidic Zn species on the molecular walls of the SBA-15 channels from wet impregnated Zn2+ and Pt2+ species. This leads to a less thermodynamically stable but kinetically controlled configuration of atomic zinc deposition on core platinum nanoparticles with unique confined lattice changes and surface properties to both host and guest structures at the interface upon reduction of the composite. This method for the formation templated nanoparticles may generate interest in forming new tunable materials as dehydrogenation catalysts.
| Item Type: | Journal Article | ||||||||
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
| Journal or Publication Title: | ACS Applied Nano Materials | ||||||||
| Publisher: | ACS | ||||||||
| ISSN: | 2574-0970 | ||||||||
| Official Date: | 28 December 2018 | ||||||||
| Dates: |
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| Volume: | 1 | ||||||||
| Number: | 12 | ||||||||
| Page Range: | pp. 6603-6612 | ||||||||
| DOI: | 10.1021/acsanm.8b01357 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access |
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