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oai:riubu.ubu.es:10259/110972025-11-26T01:05:35Zcom_10259_5822com_10259_5086com_10259_2604col_10259_5823

Stamatin, Serban N. Borghei, Maryam Dhiman, Rajnish Andersen, Shuang Ma Ruiz Fernández, Virginia Kauppinen, Esko I. Skou, Eivind M. Oxygen reduction reaction Platinum nanoparticles Carbon nanotubes Electrochemical stability A non-covalent functionalization for multi-walled carbon nanotubes has been used as an alternative to the damaging acid treatment. Platinum nanoparticles with similar particle size distribution have been deposited on the surface modified multi-walled carbon nanotubes. The interaction between platinum nanoparticles and multi-walled carbon nanotubes functionalized with 1-pyrenecarboxylic acid is studied and its electrochemical stability investigated. This study reveals the existence of a platinum-support interaction and leads to three main conclusions. First, the addition of 1-pyrenecarboxylic acid is improving the dispersion of platinum nanoparticles, leading to an improved electrochemical activity towards oxygen reduction reaction. Second, the investigations regarding the electrochemical stability showed that the platinum-support interaction plays an important role in improving the long-term stability by as much as 20%. Third, post-mortem microscopy analysis showed a surprising effect. During the electrochemical stability investigations concerned with carbon corrosion it was found that the multi-walled carbon nanotubes were undergoing severe structural change, transforming finally into carbon spheres. 2025-11-25 2025-11-25 2015-01 info:eu-repo/semantics/article 0926-3373 https://hdl.handle.net/10259/11097 10.1016/j.apcatb.2014.07.005 eng Applied Catalysis B: Environmental. 2015, V. 162, p. 289-299 https://doi.org/10.1016/j.apcatb.2014.07.005 http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier