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The Mixture of Nanoparticles of RuO2 and Pt Supported on Ti as an Efficient Catalyst for Direct Formic Acid Fuel Cell

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2019
Authors
Spasojević, Miroslav
Ribić Zelenović, Lenka
Spasojević, Milica
Trišović, Tomislav
Article (Published version)
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Abstract
An active coating, composed of a mixture of nanocrystals of RuO2 with the rutile structure and nanocrystals of metal Pt, was thermally synthetized on a titanium substrate. Cyclic voltammograms and polarization curves showed that the catalytic activity of the coating for the formic acid oxidation in an acidic solution increased with an increase in the RuO2 content, reaching the maximum value at 50 mol % RuO2. Additionally, further increase in the RuO2 content resulted in a decline of the catalytic activity. The catalytic effect was attributed to a bifunctional mechanism and an electronic effect. The bifunctional mechanism had a dominant role and was based on the fact that Ru–OH species were formed on Ru atoms of RuO2 at more negative potentials than on Pt. Those species oxidized the adsorbed COad and HCOOad—species on adjacent Pt atoms of clusters of metal Pt and thus discharge them to oxidize new HCOOH molecules.
Keywords:
formic acid fuel cells / RuO2 / catalysts
Source:
Russian Journal of Electrochemistry, 2019, 55, 12, 1350-1359
Publisher:
  • Springer
Projects:
  • Directed synthesis, structure and properties of multifunctional materials (RS-172057)
Note:
  • Peer-reviewed manuscript: http://dais.sanu.ac.rs/handle/123456789/8974

DOI: 10.1134/S1023193519120164

ISSN: 1608-3342

WoS: 000516575400021

Scopus: 2-s2.0-85077214622
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URI
http://dais.sanu.ac.rs/123456789/8973
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  • ITN SANU - Opšta kolekcija / ITS SASA - General collection
Institution
Институт техничких наука САНУ / Institute of Technical Sciences SASA

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