Статья

Spectroelectrochemical Probing of the Strong Interaction between Platinum Nanoparticles and Graphitic Domains of Carbon

Jiwei MaIC2MP, UMR-CNRS 7285, University of Poitiers, 4 rue Michel Brunet, 86022 Poitiers, FranceAurélien HabriouxIC2MP, UMR-CNRS 7285, University of Poitiers, 4 rue Michel Brunet, 86022 Poitiers, FranceCláudia MoraisIC2MP, UMR-CNRS 7285, University of Poitiers, 4 rue Michel Brunet, 86022 Poitiers, FranceAdam LeweraDepartment of Chemistry, University of Warsaw, ul. Pasteura 1, 02-093 Warsaw, PolandW. VogelDepartment of Chemistry, National Central University, No. 300 Jung-Da Rd., Chung-Li, Taoyuan 32001, TaiwanYsmael Verde‐GómezInstituto Tecnológico de Cancún, Av. Kabah Km.3 s/n, CP 77500, Cancun, Q. Roo, MexicoGuadalupe Ramos‐SánchezDepartment of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United StatesPerla B. BalbuenaDepartment of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United StatesNicolás Alonso‐VanteIC2MP, UMR-CNRS 7285, University of Poitiers, 4 rue Michel Brunet, 86022 Poitiers, France

2013en

ABI

Аннотация

This study focuses on clarifying the strong interaction existing between extended graphitic domains of ordered carbonaceous materials such as multiwalled carbon nanotubes and platinum nanoparticles. This interaction results from the heterogeneous nucleation of platinum nanoparticles onto the carbon support. The metal clusters are chemically synthesized by using the carbonyl route. Two different carbon supports are used namely, homemade multiwalled carbon nanotubes, MWCNT-m, and classical Vulcan XC-72. Physicochemical properties of these materials are described by Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). The effect of the strong interaction on the electronic properties of platinum nanoparticles is electrochemically probed by means of CO stripping experiments coupled with in situ Fourier transform infrared spectroscopy (FTIR). Density functional theory (DFT) is used to evaluate changes to the electronic structure of a platinum cluster interacting with a graphite substrate and their effects on CO adsorption on the cluster. Results are correlated with structural and electronic properties of platinum nanoparticles. The stability of Pt/carbon catalysts under electrochemical potential cycling is correlated with the properties of carbon substrates.

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Идентификаторы

DOI: 10.1021/cs4003222

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar