Oxygen and chlorine evolution on RuO2+TiO2+CeO2+Nb2O5 mixed oxide electrodes

被引：89
作者：
Santana, MHP [1 ]
De Faria, LA [1 ]
机构：
[1] UFU, Inst Quim, BR-38400902 Uberlandia, MG, Brazil
来源：
ELECTROCHIMICA ACTA | 2006年 / 51卷 / 17期
关键词：
Ru plus Ti plus Cc plus Nb oxides; oxygen evolution; chlorine evolution; ruthenium oxide; electrocatalysis;
D O I：
10.1016/j.electacta.2005.09.050
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A systematic investigation was conducted on the mechanism and electrocatalytic properties Of 02 and Cl, evolution on mixed oxide electrodes of nominal composition: Ti/[Ru(0.3)Ti(0.6)CC(0.1-x)1]O-2[Nb2O5]((x)) (0 <= x <= 0. 1). For the oxygen evolution, a 30 mV Tafel slope is obtained in the presence of CeO2, while in its absence a 40 mV coefficient is observed. The intrinsic electrocatalytic activity is mainly due to electronic factors, as result of the synergism between Ru and Cc oxides. For chlorine evolution, the Tafel slope (30 mV) is independent on oxide composition. The best global electrocatalytic activity for CIER was observed in the absence of Nb2O5 additive. Variation of the voltammetric charge throughout the experiments confirms high CeO2 content compositions are fragile, due mainly to the porosity caused by CeO2 presence. On the other hand, Nb2O5 addition decreases considerably this instability. (c) 2005 Elsevier Ltd. All rights reserved.
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页码：3578 / 3585
页数：8
相关论文
共 41 条
  • [1] KINETICS AND MECHANISM OF OXYGEN EVOLUTION ON IRO2-BASED ELECTRODES CONTAINING TI AND CE ACIDIC SOLUTIONS
    ALVES, VA
    DASILVA, LA
    BOODTS, JFC
    TRASATTI, S
    [J]. ELECTROCHIMICA ACTA, 1994, 39 (11-12) : 1585 - 1589
  • [2] HETEROGENEOUS ACID-BASE EQUILIBRIA AND REACTION ORDER OF OXYGEN EVOLUTION ON OXIDE ELECTRODES
    ANGELINETTA, C
    FALCIOLA, M
    TRASATTI, S
    [J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1986, 205 (1-2): : 347 - 353
  • [3] SOME OXIDE CATALYSTS FOR ANODIC EVOLUTION OF CHLORINE - REACTION-MECHANISM AND CATALYTIC ACTIVITY
    ARIKADO, T
    IWAKURA, C
    TAMURA, H
    [J]. ELECTROCHIMICA ACTA, 1978, 23 (01) : 9 - 15
  • [4] Bard AJ, 1980, ELECTROCHEMICAL METH, P96
  • [5] BOCKRIS JO, 1977, MODERN ELECTROCHEMIS, P918
  • [6] MECHANISTIC STUDY OF CL2 EVOLUTION AT TI-SUPPORTED CO3O4 ANODES
    BOGGIO, R
    CARUGATI, A
    LODI, G
    TRASATTI, S
    [J]. JOURNAL OF APPLIED ELECTROCHEMISTRY, 1985, 15 (03) : 335 - 349
  • [7] MECHANISM OF CHLORINE EVOLUTION ON OXIDE ANODES - STUDY OF PH EFFECTS
    CONSONNI, V
    TRASATTI, S
    POLLAK, F
    OGRADY, WE
    [J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1987, 228 (1-2): : 393 - 406
  • [8] Conway B.E., 1964, Electrochim. Acta, V9, P1599, DOI 10.1016/0013-4686(64)80088-8
  • [9] Ruthenium based DSA® in chlorate electrolysis -: critical anode potential and reaction kinetics
    Cornell, A
    Håkansson, B
    Lindbergh, G
    [J]. ELECTROCHIMICA ACTA, 2003, 48 (05) : 473 - 481
  • [10] Morphological, chemical, and electrochemical properties of Ti/(TiO2+IrO2) electrodes
    da Silva, LA
    Alves, VA
    da Silva, MAP
    Trasatti, S
    Boodts, JFC
    [J]. CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE, 1997, 75 (11): : 1483 - 1493
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