Electrocatalytic activity of hypo–hyper-d-electrocatalysts (Me/TiO2/MWCNTs) based on Co-Ru in alkaline hydrogen electrolyser

Perica Paunović, Orce Popovski, Dafinka Stoevska Gogovska, Elefteria Lefterova, Evelina Slavcheva, Aleksandar T. Dimitrov

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).

Keywords


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

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References


F. Barbir, Fuel cells and hydrogen economy, Chem. Ind. & Chem. Eng. Quuart., 11 (2005), 105–13.

K. Lee, J. Zhang, H. Wang and D. P. Wilkinson, Progress in the synthesis of carbon nanotube- and nanofiber-supported Pt electrocatalysts for PEM fuel cell catalysis, J. Appl. Electrchem., 36 (2006), 507–522.

M. M. Jakšić, Brewer intermetallic phases as synergetic electrocatalysts for hydrogen evolution, Materials Chemistry and Physics, 22 (1989), 1–26.

М. Јакшич, В. Комненич, Р. Атанасоски, Р. Аджич, Електрокатализ при виделении водорода на титане, его сплавах и графите, Електрохима, 13 (1977), 1355.

P. Serp, M. Corrias and P. Kalck, Carbon nanotubes and nanofibers in catalysis, Appl. Catal. A: Gen., 253 (2003), 337–358.

U. Sahaym and M. Grant Norton, Advances in the application of nanotechnology in enabling a ‘hydrogen economy’, J. Mater. Sci., 43 (2008), 5395–5429.

P. Paunović, A. T. Dimitrov, O. Popovski, D. Slavkov, S. Hadži Jordanov, Use of multiwalled carbon nanotubes (MWCNTS) as a support material in complex electrocatalysts for hydrogen evolution, Maced. J. Chem. Chem. Eng., 26 (2007), 87–93.

P. Paunović, A. T. Dimitrov, O. Popovski, E. Slavcheva, A. Grozdanov, E. Lefterova, Dj. Petruševski and S. Hadži Jordanov, Effect of Activation/Purification of Multiwalled Carbon Nanotubes (MWCNTs) on Activity of Nonplatinum Based Hypo-Hyper d-Electrocatalysts for Hydrogen Evolution, Mat. Res. Bull., 44 (2009), 1816–1821.

S. J. Tauster, S. C. Fung, R. L. Garten, Strong metal-support interactions. Group 8 noble metals supported on titanium dioxide, J. Am. Chem. Soc., 100 (1978), 170‒75.

S. G. Neophytides, S. Zaferiatos, G. D. Papakonstantinou, J. M. Jakšić, F. E. Paloukis and M. M. Jakšić, Extended Brewer hypo-hyper-d-interionic bonding theory, I. Theoretical considerations and examples for its experimental confirmation, Int. J. Hydr. Ener., 30 (2005), 131–147.

F. Maillard, P. A. Simonov and E. R Savinova, in P. Serp and J. L. Figueiredo, Carbon Materials as Supports for Fuel Cell Electrocatalysts, John Wiley & Sons (2009), 429.

Y. Shao, G. Yin, J. Zhang, Y. Gao, Comparative investigation of the resistance to electrochemical oxidation of carbon black and carbon nanotubes in aqueous sulfuric acid solution, Electrochim. Acta, 51 (2006), 5853–5857.

S. Hadži Jordanov, P. Paunović, O. Popovski, A. Dimitrov and D. Slavkov, Electrocatalysts in the last 30 years ‒ from precious metals to cheaper but sophisticated complex systems, Bull. Chem. Technol. Macedonia, 23 (2004), 101–112.

P. Paunović, O. Popovski, S. Hadži Jordanov, A. Dimitrov and D. Slavkov, Modification for improvement of catalysts materials for hydrogen evolution, J. Serb. Chem. Soc., 71 (2006), 149–165.

P. Paunović, O. Popovski, A. T. Dimitrov, D. Slavkov, E. Lefterova and S. Hadži Jordanov, Improvement of performances of complex non-platinum electrode materials for hydrogen evolution, Electrochim. Acta, 52 (2006), 1610– 1618.

P. Paunović, O. Popovski, A. T. Dimitrov, D. Slavkov, E. Lefterova and S. Hadži Jordanov, Study of structural and electrochemical characteristics of Co-based hypo-hyper d-electrocatalysts for hydrogen evolution, Electrochimica Acta, 52 (2006), 4640–4648.

P. Paunović, A. T. Dimitrov, O. Popovski, E. Slavcheva, A. Grozdanov, E. Lefterova, Dj. Petruševski and S. Hadži Jordanov, Effect of activation/purification of multiwalled carbon nanotubes (MWCNTs) on activity of non-platinum based hypo-hyper d-electrocatalysts for hydrogen evolution, Material Research Bulletin, 44 (2009), 1816–1821.

P. Paunović, O. Popovski and I. Radev, Investigation of cell assemblies prepared out of electrocatalysts aimed for hydrogen evolution, Bull. Chem Technol. Macedonia, 24 (2005), 133–141.

P. Paunović, I. Radev, A. T. Dimitrov, O. Popovski, E. Lefterova, E. Slavcheva, and S. Hadži Jordanov, New nano-structured and interactive supported composite electrocatalysts for hydrogen evolution with partially replaced platinum loading, Int. J. of Hyd. Ener., 34 (2009), 2866–2873.

BG patent Appl. No 38581.

Y. Jin, G. Li, Yo. Zhang, Yu. Zhang, L. Zhang, Photoluminescence of anatase TiO2 thin films achieved by the addition of ZnFe2O4, J. Phys.: Condens. Matter., 13 (2001), L913-L918.

W. K. Behl and J. E. Toni, Anodic oxidation of cobalt in potassium hydroxide electrolytes, J. Electroanal. Chem., 31 (1971), 63–75.

N. Sato and T. Ohtsuka, Anodic Oxidation of Cobalt in Neutral and Basic Solution, J. Electrochem. Soc., 125 (1978), 1735–1740.

L. D. Burke and O. J. Murphy, Electrochromic behaviour of oxide films grown on cobalt and manganese in base, J. Electroanal. Chem., 109 (1980), 373–377.

S. Hadži Jordanov, Towards the year 2000: Some aspects of the electrochemistry in the last decades of twentieth century, Bull. Chem. Technol. Macedonia, 16 (1997), 75–88.




DOI: http://dx.doi.org/10.20450/mjcce.2011.70

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