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Selective Electrocatalysis on Platinum Nanoparticles with Preferential (100) Orientation Prepared by Cathodic Corrosion

Authors
  • Duca, Matteo1, 2
  • Rodriguez, Paramaconi1, 3
  • Yanson, Alexei I.1
  • Koper, Marc T. M.1
  • 1 Leiden Institute of Chemistry, Leiden University, Leiden, 2300 RA, The Netherlands , Leiden (Netherlands)
  • 2 Unité Mixte de Recherche Université–CNRS No. 7591, Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d’Electrochimie Moléculaire, Bâtiment Lavoisier, 15 Rue Jean de Baïf, Paris Cedex 13, 75205, France , Paris Cedex 13 (France)
  • 3 School of Chemistry, The University of Birmingham, Birmingham, B15 2TT, UK , Birmingham (United Kingdom)
Type
Published Article
Journal
Topics in Catalysis
Publisher
Springer US
Publication Date
Oct 18, 2013
Volume
57
Issue
1-4
Pages
255–264
Identifiers
DOI: 10.1007/s11244-013-0180-5
Source
Springer Nature
Keywords
License
Yellow

Abstract

The “cathodic corrosion” method for nanoparticle synthesis has been used to produce Pt nano-crystals with a preferential (100) orientation. These particles are surfactant-free and electrochemically clean, featuring a significant percentage of (100) terrace sites, as confirmed by electrochemical characterization tests to establish the amount of (100) sites: blank voltammetry in H2SO4, adsorbed CO stripping, and Ge irreversible adsorption. The high catalytic activity of these preferentially oriented particles is confirmed for reactions preferring (100) sites, such as dimethyl ether oxidation, ammonia oxidation, and nitrite reduction in alkaline media. In the case of nitrite reduction it is demonstrated that, similarly to (100) terraces of a well-ordered Pt single crystal electrode, the (100) facets of the nano-crystals can steer the reaction towards the selective formation of N2. The use of an inexpensive preparation method to obtain nano-electrocatalysts that can perform selective electrocatalytic reactions such as ammonia oxidation and nitrite reduction, can pave the way for a new generation of practical catalysts for environmental and energy purposes.

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