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Preparation and electrochemical characteristics of CoTMPP-TiO2NT/BP composite electrocatalyst for oxygen reduction reaction
Electrochimica Acta ( IF 6.6 ) Pub Date : 1 January 2007 , DOI: 10.1016/j.electacta.2006.08.018
Xian-Yu Xie , Zi-Feng Ma , Xing Wu , Qi-Zhi Ren , Xianxia Yuan , Qi-Zhong Jiang , Liqing Hu

CoTMPP-TiO2NT/BP composites have been synthesized by preparing CoTMPP and depositing CoTMPP on carbon-supported titania nanotube (TiO2NT/BP) using microwave irradiation method at the same time, followed by heat-treatment from 300 to 900 °C in N2 atmosphere. The catalytic activity for oxygen reduction was evaluated by rotating disc electrode technique in half cells with 0.5 M H2SO4. The number of electrons exchanged during ORR and the percentage of peroxide (%H2O2) produced by the reaction were evaluated for catalysts by rotating ring disk electrode (RRDE) measurements. The influences of TiO2NT doping, the heat-treating temperature and the different ratios of BP:TiO2NT on the activity of electrocatalysts for oxygen reduction were investigated. The stability of the CoTMPP-TiO2NT/BP electrocatalysts was studied with potentialstatic-polarization measurements in 0.5 M H2SO4 + 0.5 M CH3OH. CoTMPP-TiO2NT/BP composites show higher catalytic activity and better stability than CoTMPP/BP. The mechanism for the enhanced catalytic activity of CoTMPP-TiO2NT/BP is discussed.

中文翻译:

CoTMPP-TiO 2 NT / BP氧还原反应复合电催化剂的制备及电化学性能

CoTMPP-TiO 2 NT / BP复合材料是通过制备CoTMPP并同时用微波辐射法将CoTMPP沉积在碳载二氧化钛纳米管(TiO 2 NT / BP)上,然后在300至900°C的温度下热处理而合成的。在N 2气氛中。通过旋转圆盘电极技术在0.5 MH 2 SO 4的半电池中评估氧还原的催化活性。通过旋转环盘电极(RRDE)测量,评估了催化剂在ORR期间交换的电子数和反应产生的过氧化物的百分比(%H 2 O 2)。TiO 2的影响研究了NT掺杂,热处理温度和BP:TiO 2 NT对电催化剂活性氧还原活性的不同比例。通过在0.5 MH 2 SO 4  + 0.5 M CH 3 OH中进行电势极化测量,研究了CoTMPP-TiO 2 NT / BP电催化剂的稳定性。CoTMPP-TiO 2 NT / BP复合材料比CoTMPP / BP具有更高的催化活性和更好的稳定性。讨论了提高CoTMPP-TiO 2 NT / BP催化活性的机理。
更新日期:2017-01-31
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