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以四氯化钛为前驱体,采用水热法合成二氧化钛纳米棒(TiO2,白色),在纯H2气氛,将其550oC热处理2h,即得有氧缺陷和Ti3+填隙原子的二氧化钛纳米棒(H-TiO2,灰黑色).将Pt纳米粒子(~1.9 nm)负载于此两种二氧化钛纳米棒上,制得Pt/TiO2和Pt/H-TiO2催化剂.XRD和XPS测试表明,氢处理TiO2晶型没有变化,仍属金红石型,但增加了Ti-OH表面物种.电化学测试表明,H-TiO2载体能够增强氧在Pt表面的吸脱附能力,从而提高其甲醇电催化氧化活性,Pt/H-TiO2电极甲醇氧化峰电流密度为Pt/TiO2电极的1.6倍、Pt/C电极的2.1倍.
Titanium dioxide nanorods (TiO2, white) were synthesized by hydrothermal method using titanium tetrachloride as precursor. The pure titanium dioxide was heat-treated at 550oC for 2h in pure H2 atmosphere to obtain oxygen-deficient titanium dioxide nanorods -TiO2, gray-black.) Pt / TiO2 and Pt / H-TiO2 catalysts were prepared by loading Pt nanoparticles (~ 1.9 nm) on the two titania nanorods.XRD and XPS measurements showed that the hydrogenation of TiO2 The results of electrochemical tests show that the H-TiO2 carrier can enhance the adsorption and desorption of oxygen on the Pt surface to improve the electrocatalytic oxidation activity of Pt, and the Pt / H -TiO2 electrode methanol oxidation peak current density of Pt / TiO2 electrode 1.6 times, Pt / C electrode 2.1 times.