caa a22 4500 47581584X CHVBK 20180406123809.0 cr unu---uuuuu 170329e20000401xx s 000 0 eng 10.1023/A:1003961417762 doi (NATIONALLICENCE)springer-10.1023/A:1003961417762 Effect of oxygen and titanium contents on the stability of nanocrystalline Ti-Ru-Fe-O cathode materials for chlorate electrolysis [Elektronische Daten] [L. Roué, M.-E. Bonneau, D. Guay, M. Blouin, R. Schulz] Electrodes made from nanocrystalline Ti:Ru:Fe (2−y:1+y/2:1+y/2), with y varying from 0 to 1 by step of 0.25, and Ti:Ru:Fe:O (2:1:1:w), with w varying from 0 to 2 by step of 0.5, were prepared and tested as activated cathodes for the hydrogen evolution reaction in typical chlorate electrolysis conditions. These electrodes were subjected to an accelerated aging test, consisting of a succession of cycles of hydrogen discharge (HER) and open-circuit (OCP) conditions. In addition to monitoring the cathodic overpotential value during the aging test, visual inspection and mass loss measurements were performed on the electrodes at the end of the test to assess their stability. In the case of Ti:Ru:Fe (2:1:1), a large increase of the cathodic overpotential value is observed after 20 cycles. Adding O to the formulation causes a remarkable improvement of the long-term stability of the electrodes. As little as [O] = 10 at.% in nanocrystalline Ti:Ru:Fe:O (2:1:1:w) materials is sufficient for the electrode to show absolutely no sign of degradation after 50 cycles of HER/OCP, the longest accelerated test conducted. Adding more O to the formulation of the material does not lead to further stability improvement. A better stability under the conditions of the accelerated aging test can also be observed for nanocrystalline Ti:Ru:Fe (2−y:1+y/2:1+y/2) materials with y > 0. In that case however, the level of improvement is dependent on the value of y. The best results are obtained for y = 0.75. A hypothesis is proposed to explain the improved stability obtained by lowering the Ti content and/or by adding O. The similarity and difference between both ways of improving the stability of the nanocrystalline Ti:Ru:Fe materials are also discussed. Kluwer Academic Publishers, 2000 ball milling nationallicence chlorate electrolysis nationallicence electrocatalysis nationallicence hydrogen evolution nationallicence nanocrystalline nationallicence Roué L. INRS-Énergie et Matériaux, 1650 Blvd. Lionel-Boulet, C.P. 1020, J3X 1S2, Varennes, Québec, Canada aut Bonneau M.-E INRS-Énergie et Matériaux, 1650 Blvd. Lionel-Boulet, C.P. 1020, J3X 1S2, Varennes, Québec, Canada aut Guay D. INRS-Énergie et Matériaux, 1650 Blvd. Lionel-Boulet, C.P. 1020, J3X 1S2, Varennes, Québec, Canada aut Blouin M. Technologies Émergentes de production et de stockage, Institut de recherche d'Hydro-Québec, 1800 Blvd. Lionel-Boulet, C.P. 1000, J3X 1S1, Varennes, Québec, Canada aut Schulz R. Technologies Émergentes de production et de stockage, Institut de recherche d'Hydro-Québec, 1800 Blvd. Lionel-Boulet, C.P. 1000, J3X 1S1, Varennes, Québec, Canada aut Journal of Applied Electrochemistry Kluwer Academic Publishers 30/4(2000-04-01), 491-498 0021-891X 30:4<491 2000 30 10800 https://doi.org/10.1023/A:1003961417762 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1003961417762 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Roué L. INRS-Énergie et Matériaux, 1650 Blvd. Lionel-Boulet, C.P. 1020, J3X 1S2, Varennes, Québec, Canada aut NATIONALLICENCE 700 1- Bonneau M.-E INRS-Énergie et Matériaux, 1650 Blvd. Lionel-Boulet, C.P. 1020, J3X 1S2, Varennes, Québec, Canada aut NATIONALLICENCE 700 1- Guay D. INRS-Énergie et Matériaux, 1650 Blvd. Lionel-Boulet, C.P. 1020, J3X 1S2, Varennes, Québec, Canada aut NATIONALLICENCE 700 1- Blouin M. Technologies Émergentes de production et de stockage, Institut de recherche d'Hydro-Québec, 1800 Blvd. Lionel-Boulet, C.P. 1000, J3X 1S1, Varennes, Québec, Canada aut NATIONALLICENCE 700 1- Schulz R. Technologies Émergentes de production et de stockage, Institut de recherche d'Hydro-Québec, 1800 Blvd. Lionel-Boulet, C.P. 1000, J3X 1S1, Varennes, Québec, Canada aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 30/4(2000-04-01), 491-498 0021-891X 30:4<491 2000 30 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer