用SEM和XRD技术测定和分析了不同超声波作用时间下Ti/SnO2+Sb2O3/PbO2
电极材料的表面形貌和结构,应用循环伏安法研究了超声波作用时间对Ti/SnO2+Sb2O3/PbO2电极在1.0mol/L H2SO4溶液中的伏安特性的影响.实验结果表明:超声波作用于电极材料会对电极表面的形貌和结构产生影响;电极经超声处理20min后,其循环伏安峰电流与未经超声波作用时相比增加了近1倍;电极的电化学活性表面积随超声波作用时间的延长呈先增大后减小的趋势,在本实验中超声波作用时间为20min时,伏安电荷最大,即活性表面积最大.
The morphology and microstructure of the electrodes under ultrasound were observed and analyzed by means of
ESEM and XRD. The effects of ultrasonic irradiation time on the electrochemical active surface of the Ti/SnO2+Sb2O3/PbO2 electrodes in 1.0mol/L
H2SO4 solutions were studied by cyclic voltammetry. The experimental results show that the ultrasound has the influence on the morphology and
microstructure of the electrodes surfaces. Under ultrasound for 20min, the cyclic voltammetric peak current density is about two times as high as that
of the anode without ultrasonic irradiation. The voltammetric charge of the electrodes increases firstly as the time under ultrasound increases, after
ultrasonic irradiation 20min, and the voltammetric charge decreases with increasing ultrasonic irradiation time. The voltammetric charge is the highest under the condition of ultrasonic irradiation for 20min, which
means that the electrochemical active surface of the electrodes is the largest at the ultrasonic irradiation time.
参考文献
| [1] | Pelegrino R R L, Vicentin L C, De Andrade A R, et al. Electrochem Commun, 2002, 4 (2): 139--142. [2] Kim Kwang-Wook, Lee Eil-Hee, Kim Jung-Sik, et al. Electrochim Acta, 2002, 47 (15): 2525--2531. [3] 王雅琼(WANG Ya-Qiong, et al). 无机材料学报(Journal of Inorganic Materials), 2003, 18 (5): 1033--1038. [4] 王雅琼, 陈昌平, 童宏扬, 等. 过程工程学报, 2003, 3 (2): 125--129. [5] Marken F, Akkermans R P, Compton R G. J Electroanal Chem, 1996, 415 (1-2): 55--63. [6] 王雅琼, 傅相林, 李敏, 等. 扬州大学学报(自然科学版), 2003, 6 (1): 29--32. [7] 许文林, 傅相林, 王雅琼, 等. 扬州大学学报(自然科学版), 2003, 6 (2): 21--24. [8] 王雅琼, 童宏扬, 许文林. 过程工程学报, 2003, 3 (4): 356--360. [9] Trasatti S. Electrochim Acta, 1991, 36 (2): 225--241. [10] Vogt H. Electrochim Acta, 1994, 39 (13): 1981--1983. [11] Da Silva L A, Alves V A, Trasatti S, et al. J Electroanal Chem, 1997, 427 (1-2): 97--104. [12] Da Silva L M, Boodts J F C, De Faria L A. Electrochim. Acta, 2000, 45 (17): 2719--2727. [13] Cifuentes G, Cifuentes L, Kammel R, et al. Z Metallkd, 1998, 89 (5): 363--367. [14] De Pauli C P, Trasatti S. J Electroanal Chem, 1995, 396 (1-2): 161--168. |
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