2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 9: Physics, Advanced Materials, Multifunctional Materials

Editors:Kongoli F, Dubois JM, Gaudry E, Fournee V, Marquis F
Publisher:Flogen Star OUTREACH
Publication Year:2015
Pages:275 pages
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)
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    Domestic Wastewater Treatment Using Pt,Ni-RE (Rare Earth) Electrodes

    Eurico Moutinho1; Daniele Maccio2; Adriana Saccone2; Margarida Mateus1; Diogo Santos1;
    Type of Paper: Regular
    Id Paper: 363
    Topic: 21


    Electrochemical technologies can be used for the treatment of domestic wastewaters, by eliminating their organic pollutants. They have advantages over conventional methods, such as environmental compatibility, versatility, energy efficiency, safety and cost. The organic compounds degradation process is based on the production of OH radicals, formed during water electrolysis, which will oxidize the organic molecules producing CO2. At the same time, hydrogen (H2) can be produced through reduction of the water in the effluent, which can be later used in a fuel cell. The present study seeks to find effective electrocatalysts to produce H2 by electrolysis, using a domestic wastewater as a hydrogen source, with or without the addition of electrolytes. Cyclic voltammetry (CV) is performed using several different cathode materials, namely platinum (Pt) and platinum-rare earth (Pt-RE) binary alloys, and nickel (Ni) and Ni-RE alloys, with the REs being cerium (Ce), samarium (Sm), dysprosium (Dy), and holmium (Ho). CV measurements are conducted at different temperatures, ranging between 25 and 85 ºC. KOH was selected for electrolyte, as the extra hydroxide can be used to degrade the organic matter. The data obtained for the hydrogen evolution reaction (HER) at the different electrode materials is compared. It is noticeable that the effluent containing the KOH additive leads to significantly better performances.


    domestic wastewater; hydrogen evolution reaction; platinum; nickel; rare earth alloys


    [1] S.P.S. Badwal, S. Giddey, A. Kulkarni, J. Goel, S. Basu: Direct ethanol fuel cells for transport and stationary applications – A comprehensive review, Applied Energy, 145 (2015), 80-103.
    [2] J.H. Hirschenhofer, D.B. Stauffer, R.R. Engleman, M.G. Klett, Fuel Cell Handbook Fourth Edition, 1998, Federal Energy Technology Center.
    [3] M.Z.F. Kamarudin, S.K. Kamarudin, M.S. Masdar, W.R.W. Daud: Review: Direct ethanol fuel cells, International Journal of Hydrogen Energy, 38 (2012), 9438-9453.
    [4] E.H. Yu, U. Krewer, K. Scott: Principles and Materials Aspects of Direct Alkaline Alcohol Fuel Cells, Energies, 3 (2010), 1499-1528.
    [5] B. Gurau, E.S. Smotkin: Methanol crossover in direct methanol fuel cells: a link between power and energy density, Fuel Energy Abstracts, 44(2003):379.
    [6] C. LAMY, C. COUTANCEAU, Electrocatalysis of Alcohol Oxidation Reactions at Platinum Group Metals, 2012, Royal Society of Chemistry, chapter 1.
    [7] A.O. Neto, A.Y. Watanabe, R.M.D.S. Rodrigues, M. Linardi, C.A.L.G.O. Forbicini, E.V. Spinacé: Electrooxidation of ethanol using Pt rare earth-C electrocatalysts prepared by an alcohol reduction process, Ionics, 14 (2008), 577-581.
    [8] K.W. Lux, E.J. Cairns: Lanthanide–Platinum Intermetallic Compounds as Anode Electrocatalysts for Direct Ethanol PEM Fuel Cells, Journal of Electrochemical Society, 153 (2006):A1139-A1147.
    [9] S.W. Xie, S. Chen, Z.Q. Liu, C.W. Xu: Comparison of alcohol electrooxidation on Pt and Pd electrodes in alkaline medium, International Journal of Electrochemical Society, 6 (2011), 882-888.
    [10] B. Šljuki&#263;, J. Miliki&#263;, D.M.F. Santos, C.A.C. Sequeira, D. Macciò, A. Saccone: Electrocatalytic performance of Pt-Dy alloys for direct borohydride fuel cells, Journal of Power Sources, 272 (2014), 335-34.
    [11] D.M.F. Santos, P.G. Saturnino, D. Macciò, A. Saccone, C.A.C. Sequeira: Platinum-rare earth intermetallic alloys as anode electrocatalysts for borohydride oxidation, Catalysis Today, 170 (2011), 134-140.
    [12] D.M.F. Santos, C.A.C. Sequeira, D. Macciò, A. Saccone, J.L. Figueiredo: Platinum-rare earth electrodes for hydrogen evolution in alkaline water electrolysis, International Journal of Hydrogen Energy, 38 (2013), 3137-3145.
    [13] D.M.F. Santos, B. Šljuki&#263;, C.A.C. Sequeira, D. Macciò, A. Saccone, J.L. Figueiredo: Electrocatalytic approach for the efficiency increase of electrolytic hydrogen production: proof-of-concept using Pt-Dy, Energy, 50 (2013), 486-492.
    [14] D.A.C. BROWSON, C.E. BANKS, The Handbook of Graphene Electrochemistry, 2014, Springer-Verlag London.
    [15] D.M.F. Santos, C.A.C. Sequeira: Cyclic voltammetry investigation of borohydride oxidation at a gold electrode. Electrochimica Acta, 55 (2010), 6775-6781.
    [16] A.J. BARD, L.R. FAULKNER, Electrochemical methods: fundamentals and applications – 2nd ed., 2001, John Wiley & Sons, chapter 6.
    [17] M.I. Ionita, N. Ene, M. Vinatoru: Sonoelectrochemical studies of the ethanol oxidation in alkaline médium, Revue Roumaine de Chimie, 46 (2001), 637-647.

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    Moutinho E, Maccio D, Saccone A, Mateus M, Santos D. Domestic Wastewater Treatment Using Pt,Ni-RE (Rare Earth) Electrodes. In: Kongoli F, Dubois JM, Gaudry E, Fournee V, Marquis F, editors. Sustainable Industrial Processing Summit SIPS 2015 Volume 9: Physics, Advanced Materials, Multifunctional Materials. Volume 9. Montreal(Canada): FLOGEN Star Outreach. 2015. p. 209-218.