Electrocatalytic activity of hypo–hyper-d-electrocatalysts (Me/TiO<sub>2</sub>/MWCNTs) based on Co-Ru in alkaline hydrogen electrolyser

Authors

  • Perica Paunović Faculty of Technology and Metallurgy, Ss. Cyril and Methodius University, Skopje
  • Orce Popovski Military Academy “General Mihailo Apostolski” Vasko Karangeleski bb, Skopje
  • Dafinka Stoevska Gogovska Faculty of Technology and Metallurgy, Ss. Cyril and Methodius University, Skopje
  • Elefteria Lefterova Institute of Electrochemistry and Energy Systems, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl.11, 1113 Sofia
  • Evelina Slavcheva Institute of Electrochemistry and Energy Systems, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl.11, 1113 Sofia
  • Aleksandar T. Dimitrov Faculty of Technology and Metallurgy, Ss. Cyril and Methodius University, Skopje

DOI:

https://doi.org/10.20450/mjcce.2011.70

Keywords:

hyper-hypo d-electrocatalysts, water electrolysis, hydrogen evolution, Co, Ru, anatase, MWCNTs

Abstract

This study is concerned with preparation and characterization of Co-Ru based hypo-hyper d-electrocatalysts aimed for water electrolysis. The composition of the studied electrocatalysts was: 10 % mixed metallic phase (Co : Ru = 1 : 1 wt., Co:Ru = 4 : 1 wt. and Co : Ru : Pt = 4 : 0.5 : 0.5), 18 % TiO2 as a crystalline anatase deposited on activated multiwalled carbon nanotubes (MWCNTs). For comparison, corresponding electrocatalysts with pure hyper d-metallic phase (Co and Ru) were prepared. The structural characterization of the studied electrocatalysts was performed by means of XRD, SEM and FTIR analysis. The prepared hypo-hyper d-electrocatalysts were electrochemically studied by cyclic voltammetry and potentiodynamic method in the alkaline hydrogen electrolyser. The order of the catalytic activity for hydrogen evolution of studied electrocatalysts was the following: Ru > CoRuPt (4 : 0.5 : 0.5, wt.) > CoRu (1 : 1 wt.) > CoRu (4 : 1 wt.) > Co. The electrocatalyst with only 20 % precious metals (Pt and Ru) in the metallic phase (the rest being Co-metal) exhibited excellent performance approaching that of the electrocatalyst with 100 % precious metallic phase (Ru).

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Published

2011-06-15

How to Cite

Paunović, P., Popovski, O., Stoevska Gogovska, D., Lefterova, E., Slavcheva, E., & Dimitrov, A. T. (2011). Electrocatalytic activity of hypo–hyper-d-electrocatalysts (Me/TiO<sub>2</sub>/MWCNTs) based on Co-Ru in alkaline hydrogen electrolyser. Macedonian Journal of Chemistry and Chemical Engineering, 30(1), 55–65. https://doi.org/10.20450/mjcce.2011.70

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Section

Electrochemistry