Synthesis of Pt Nanoparticles in Water-in-Oil Microemulsion: Effect of HCl on Their Surface Structure

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Title: Synthesis of Pt Nanoparticles in Water-in-Oil Microemulsion: Effect of HCl on Their Surface Structure
Authors: Martínez-Rodríguez, Roberto A. | Vidal-Iglesias, Francisco J. | Solla-Gullón, José | Cabrera, Carlos R. | Feliu, Juan M.
Research Group/s: Electroquímica de Superficies | Electroquímica Aplicada y Electrocatálisis
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica
Keywords: Synthesis | Pt nanoparticles | Water-in-oil microemulsion | HCl | Surface structure
Knowledge Area: Química Física
Issue Date: 14-Jan-2014
Publisher: American Chemical Society
Citation: Journal of the American Chemical Society. 2014, 136(4): 1280-1283. doi:10.1021/ja411939d
Abstract: The synthesis of shape-controlled nanoparticles is currently a hot research topic. However, from an applied point of view, there is still a lack of easy, cheap, and scalable methodologies. In this communication we report, for the first time, the synthesis of cubic platinum nanoparticles with a very high yield using a water-in-oil microemulsion method, which unlike others, such as the colloidal method, fulfills the previous requirements. This shape/surface structure control is determined by the concentration of HCl in the water phase of the microemulsion. The results reported here show that the optimal HCl percentage in the water phase is about 25% to obtain the highest amount of cubic nanostructures. Ammonia electro-oxidation is used as a surface structure sensitive reaction to illustrate HCl surface structure effects. Moreover, in situ electrochemical characterization has been performed to study the nanoparticle surface structure.
Sponsor: This work has been financially supported by the MCINN-FEDER (Spain) (project CTQ 2010-16271), by the Generalitat Valenciana (project PROMETEO/2009/045), and in part by the NASA-URC Grant No. NNX10AQ17A and NSF-NSEC Center for Hierarchical Manufacturing Grant No. CHM-CMMI-0531171. R.M.-R. is grateful to the Becas Iberoamérica, Santander Universidades-España 2012, and PR-LSAMP Bridge to Doctorate Fellowship programs.
ISSN: 0002-7863 (Print) | 1520-5126 (Online)
DOI: 10.1021/ja411939d
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2014 American Chemical Society
Peer Review: si
Publisher version:
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