Pt/H-TiO2催化剂制备及其甲醇电催化氧化性能

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H:气氛,将其550oC热处理2h,即得有氧缺陷和T一填隙原子的二氧化钛纳米棒(H—TiO2,灰黑色).将Pt纳米粒子(~1.9nm)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....

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Bibliographic Details
Published in电化学 Vol. 20; no. 2; pp. 110 - 115
Main Author 韩金 周志有 汪强 吕妙强 陈驰 孙世刚
Format Journal Article
LanguageChinese
Published 01.04.2014
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Summary: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H:气氛,将其550oC热处理2h,即得有氧缺陷和T一填隙原子的二氧化钛纳米棒(H—TiO2,灰黑色).将Pt纳米粒子(~1.9nm)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.
Bibliography:35-1172/06
HAN Jin, ZHOU Zhi-you, WANG Qiang, LV Miao-qiang, CHEN Chi, SUN Shi-gang (1. State Key Laboratory of Physical Chemistry of Solid SuoCaees, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China; 2. State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China)
platinum nanoparticles; TiO2 nanorods; hydrogen treatment; methanol electrooxidation; oxygen vacancy; Ti3+interstitial atom
White TiO2 nanorods were synthesized by hydrothermal method with TIC14 as a precursor. As-synthesized TiO2 nanorods were further subjected to high-temperature (550 ~C) heat treatment for 2 h under H2 atmosphere 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 TiO~ nanorods to form Pt/TiO~ and Pt/H-TiO2 catalysts. XRD data indicates that the crystal structure of TiO2 was still
ISSN:1006-3471
2993-074X
DOI:10.13208/j.electrochem.130418