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	Pt/H-TiO_2催化剂制备及其甲醇电催化氧化性能; Preparation of Pt/H-TiO_2 Catalyst with Improved Catalytic Performance for Methanol Electrooxidation
	韩金 ; 周志有 ; 汪强 ; 吕妙强 ; 陈驰 ; 孙世刚
	2014-04-28
关键词	铂纳米粒子 TiO2纳米棒 氢处理 甲醇电氧化 氧缺陷 Ti3+填隙原子 platinum nanoparticles TiO2 nanorods hydrogen treatment methanol electrooxidation oxygen vacancy Ti3+ interstitial atom
英文摘要	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.; White TiO2 nanorods were synthesized by hydrothermal method with TiCl4 as a precursor.As-synthesized TiO2 nanorods were further subjected to high-temperature(550oC) heat treatment for 2 h under H2atmosphere to prepare gray black hydrogen-treated TiO2(H-TiO2) nanorods with oxygen vacancies and Ti3+interstitial atoms.The Pt nanoparticles of 1.9 nm were supported on these two types of TiO2nanorods to form Pt/TiO2and Pt/H-TiO2catalysts.XRD data indicates that the crystal structure of TiO2was still reserved as rutile after hydrogen treatment,but the surface was covered by some Ti-OH species,as evidenced by XPS test.Electrochemical tests demonstrate that the oxygen vacancies of H-TiO2can enhance the adsorption/desorption of oxygen on Pt nanoparticles,which promotes the electrocatalytic activity of H-TiO2towards methanol oxidation.As a result,the peak current density of methanol oxidation on Pt/H-TiO2was 1.6 and 2.1 times those of methanol oxidation on Pt/TiO2and Pt/C,respectively.; 国家自然科学基金项目(No.20933004)资助
语种	zh_CN
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/106929]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	韩金,周志有,汪强,等. Pt/H-TiO_2催化剂制备及其甲醇电催化氧化性能, Preparation of Pt/H-TiO_2 Catalyst with Improved Catalytic Performance for Methanol Electrooxidation[J],2014.
APA	韩金,周志有,汪强,吕妙强,陈驰,&孙世刚.(2014).Pt/H-TiO_2催化剂制备及其甲醇电催化氧化性能..
MLA	韩金,et al."Pt/H-TiO_2催化剂制备及其甲醇电催化氧化性能".(2014).

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