Electroreduction of NOxz species in alkaline medium on Pt nanoparticles

L.A. Estudillo-Wong (1, 2) , G. Santillan-Diaz (1) , E.M. Arce-Estrada (2) , N. Alonso-Vante (3) , A. Manzo-Robledo (1)

1 Lab Electroquim & Corros
2 Dept Ingn Met & Mat
3 SAMCat - Du site actif au matériau catalytique [E3 – IC2MP équipe 3]

The electroreduction of nitrogen species in alkaline medium was performed on platinum nanoparticles (1-2 nm) with metal loadings of 5 and 10 wt% Pt, synthesized by the chemical carbonyl route. The electrochemically active surface analysis evidences that the real surface area is concomitant to the Pt-loading in the support. The electrochemical analysis put in evidence that nitrite ions were reduced from -0.6 to -0.78 V and the charge transfer step is attributed to the NO2-/NO redox couple. The Tafel slope analysis confirms that from E-p to -0.78 V the reduction of NO occurs via an ECE mechanism. An analysis of Nicholson-Shain schemes and NO-saturated in solution verified these results. (C) 2012 Elsevier Ltd. All rights reserved.

Domaines: Catalyse; Chimie organique; Autre

L.A. Estudillo-Wong, G. Santillan-Diaz, E.M. Arce-Estrada, N. Alonso-Vante, A. Manzo-Robledo. Electroreduction of NOxz species in alkaline medium on Pt nanoparticles. Electrochimica Acta, 2013, 88, pp.358-364. ⟨10.1016/j.electacta.2012.10.055⟩. ⟨hal-00857390⟩