采用循环伏安和Tafel曲线两种方法评价了Pt电极、钛基二氧化钌电极(Ti/RuO2)及钛基二氧化锡电极(Ti/SnO2)的电催化氧化性能. 结果表明,在500 mg/L的苯酚溶液中, Pt, Ti/RuO2和Ti/SnO2电极氧化苯酚的峰电位依次为0.93, 0.95和1.40 V(vs Ag/AgCl). Tafel曲线表明,三种电极析氧过电位的顺序依次是Ti/RuO2＜Pt＜Ti/SnO2, Ti/SnO2电极的Tafel斜率约为0.45 V, 且在高电流密度下其析氧过电位较Ti/RuO2电极高 1.4 V. 以苯甲酸为羟基自由基捕获剂,采用荧光光谱法间接检测了三种电极生成羟基自由基的量. 结果表明,·OH 生成量的大小与电极的析氧电位高低顺序相一致, Ti/SnO2电极较另两种电极生成的·OH 多.
参考文献
| [1] | K(o)tz R;Stucki S;Carcer B .[J].Journal of Applied Electrochemistry,1991,21(01):14. |
| [2] | Beer H B .[P].US 3632498,1973. |
| [3] | Chang C C;Wen T C .[J].Journal of Applied Electrochemistry,1997,27(03):355. |
| [4] | He DL;Mho SI .Electrocatalytic reactions of phenolic compounds at ferric ion co-doped SnO2 : Sb5+ electrodes[J].Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry,2004(1/2):19-27. |
| [5] | Comninellis C;Pulgarin C .[J].Journal of Applied Electrochemistry,1993,23(02):108. |
| [6] | Feng Y J;Li X Y .[J].Water Research,2003,37(10):2399. |
| [7] | Fino D;Jara C;Saracco G;Specchia V Spinelli P .[J].Journal of Applied Electrochemistry,2005,35(04):405. |
| [8] | Caizares P;Martínez F;Díaz M;García-Gómez J Rodrigo M A .[J].Journal of the Electrochemical Society,2002,149(08):D118. |
| [9] | Li X Y;Cui Y H;Feng Y J;Xie Z M Gu J D .[J].Water Research,2005,39(10):1972. |
| [10] | 冯玉杰,沈宏,崔玉虹,刘峻峰.钛基二氧化铅电催化电极的制备及电催化性能研究[J].分子催化,2002(03):181-186. |
| [11] | 冯玉杰,崔玉虹,王建军.Dy改性SnO2/Sb电催化电极的制备及表征[J].无机化学学报,2005(06):836-841. |
| [12] | Matos JPF;Proenca L;Lopes MIS;Fonseca ITE .The electrochemical oxidation of xylitol on Pt(111) in acid medium[J].Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry,2004(1):111-117. |
| [13] | Simond O;Schaller V;Comninellis C .[J].Electrochimica Acta,1997,42(13-14):2009. |
| [14] | Comninellis C;Pulgarin C .[J].Journal of Applied Electrochemistry,1991,21(08):703. |
| [15] | Chen A;Nigro S .[J].Journal of Physical Chemistry B,2003,107(48):13341. |
| [16] | Chen X M;Gao F R;Chen G H .[J].Journal of Applied Electrochemistry,2005,35(02):185. |
| [17] | Johnson D C;Feng J;Houk L L .[J].Electrochimica Acta,2000,46(2-3):323. |
| [18] | Saracco G;Solarino L;Aigotti R;Specchia V Maja M .[J].Electrochimica Acta,2000,46(2-3):373. |
| [19] | 任学昌,史载锋,孔令仁.TiO2薄膜的Ag改性及光催化活性[J].催化学报,2006(09):815-822. |
| [20] | Hirakawa T.;Nosaka Y. .Properties of O-2(center dot-) and OH center dot formed in TiO2 aqueous suspensions by photocatalytic reaction and the influence of H2O2 and some ions[J].Langmuir: The ACS Journal of Surfaces and Colloids,2002(8):3247-3254. |
| [21] | Ishibashi K-I;Fujishima A;Watanabe T;Hashimoto K .[J].Journal of Photochemistry and Photobiology A:Chemistry,2000,134(1-2):139. |
| [22] | Nosaka Y.;Komori S.;Yawata K.;Hirakawa T.;Nosaka AY. .Photocatalytic (OH)-O-center dot radical formation in TiO2 aqueous suspension studied by several detection methods[J].Physical chemistry chemical physics: PCCP,2003(20):4731-4735. |
| [23] | Montilla F;Morallón E;Vázquez J L .[J].Journal of the Electrochemical Society,2005,152(10):B421. |
| [24] | Oturan M A;Pinson J .[J].Journal of Physical Chemistry,1995,99(38):13948. |
| [25] | Lindsey ME.;Tarr MA. .Quantitation of hydroxyl radical during Fenton oxidation following a single addition of iron and peroxide[J].Chemosphere,2000(3):409-417. |
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