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近年来,直接甲醇燃料电池（DMFC）由于使用液体燃料而越来越受到重视,但目前DMFC存在的一个普遍的问题是常用的Pt阳极催化剂易被甲醇氧化的中间产物所毒化.因此,一些研究者研究了能抗甲醇氧化的中间产物毒化的Pt二元合金或Pt和过渡金属氧化物复合催化剂,如Pt-Ru[1]、Pt-Sn[2]、Pt-WOx[3]等.考虑至TiO2在酸性溶液中的稳定性,Hamnett研究组[4]和我们研究组[5]发现pt-TiO2/Ti复合电极对甲醇氧化有很好的电催化活性和抗中毒的能力.本文报道了制备能在DMFC中实际使用的碳载Pt-TiO2催化剂（Pt-TiO2/C）的方法和比较了Pt-TiO2/C和Pt/C电极对甲醇氧化的电催化活性和稳定性.用固相法制备含Pt20％的Pt/C催化剂[6],将制得的pt/C催化剂和Ti（OBu）4按摩尔比1:1的比例悬浮在乙醇中,超声波震荡并加水,使Ti（OBu）4完全水解成TiO2,并均匀沉积到Pt/C催化剂上,洗涤,真空干燥,500℃热处理
In recent years, direct methanol fuel cell (DMFC) has drawn more and more attention due to the use of liquid fuel, but at present, a common problem existing in DMFC is that common Pt anode catalyst is easily poisoned by methanol oxidation intermediates.Therefore, some studies Studied Pt binary alloys or Pt and transition metal oxide composite catalysts poisoned by methanol oxidation intermediates such as Pt-Ru [1], Pt-Sn [2], Pt-WOx [3] To the stability of TiO2 in acidic solution, the Hamnett research group [4] and our research group [5] found that pt-TiO2 / Ti composite electrode has good electrocatalytic activity and anti-poisoning ability for methanol oxidation. Preparation of Pt-TiO2 / C catalyst for Pt-TiO2 / C with practical application in DMFC and the electrocatalytic activity and stability of Pt-TiO2 / C and Pt / C electrode for methanol oxidation were compared. Pt / C catalyst containing Pt20% was prepared by the method of [6], and the prepared Pt / C catalyst and Ti (OBu) 4 were suspended in ethanol at a molar ratio of 1: 1 in an ultrasonic wave. ) 4 completely hydrolyzed into TiO2, and uniformly deposited on the Pt / C catalyst, washed, vacuum dried, 500 ° C heat treatment