Pt/H-TiO2催化剂制备及其甲醇电催化氧化性能

doi:10.13208/j.electrochem.130418

电化学（中英文） ›› 2014, Vol. 20 ›› Issue (2): 110-115. doi: 10.13208/j.electrochem.130418

Pt/H-TiO₂催化剂制备及其甲醇电催化氧化性能

韩金¹，周志有^1*，汪强¹，吕妙强¹，陈驰^1,2，孙世刚¹

1. 厦门大学固体表面物理化学国家重点实验室，化学化工学院化学系，福建厦门 361005；2. 华东理工大学化学工程国家重点实验室，上海 200237

收稿日期:2013-04-17 修回日期:2013-05-16 发布日期:2014-04-17 出版日期:2014-04-28
通讯作者: 周志有 E-mail:zhouzy@xmu.edu.cn
基金资助:
国家自然科学基金项目（No. 20933004）资助

Preparation of Pt/H-TiO₂ Catalyst with Improved Catalytic Performance for Methanol Electrooxidation

HAN Jin¹, ZHOU Zhi-you^1*, WANG Qiang¹, LV Miao-qiang¹, CHEN Chi^1,2, SUN Shi-gang¹

1. State Key Laboratory of Physical Chemistry of Solid Surfaces, 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

Received:2013-04-17 Revised:2013-05-16 Online:2014-04-17 Published:2014-04-28
Contact: ZHOU Zhi-you E-mail:zhouzy@xmu.edu.cn

摘要/Abstract

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550 ^oC热处理2 h，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.

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

Abstract: White TiO₂ nanorods were synthesized by hydrothermal method with TiCl4 as a precursor. As-synthesized TiO₂ nanorods were further subjected to high-temperature (550 ^oC) 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 TiO₂ nanorods to form Pt/TiO2 and Pt/H-TiO₂ catalysts. XRD data indicates that the crystal structure of TiO₂ was 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-TiO₂ can enhance the adsorption/desorption of oxygen on Pt nanoparticles, which promotes the electrocatalytic activity of H-TiO₂ towards methanol oxidation. As a result, the peak current density of methanol oxidation on Pt/H-TiO₂ was 1.6 and 2.1 times those of methanol oxidation on Pt/TiO₂ and Pt/C, respectively.

Key words: platinum nanoparticles, TiO₂ nanorods, hydrogen treatment, methanol electrooxidation, oxygen vacancy, Ti³⁺ interstitial atom

中图分类号:

O646

韩金，周志有*，汪强，吕妙强，陈驰，孙世刚. Pt/H-TiO₂催化剂制备及其甲醇电催化氧化性能[J]. 电化学（中英文）, 2014, 20(2): 110-115.

HAN Jin, ZHOU Zhi-you*, WANG Qiang, LV Miao-qiang, CHEN Chi, SUN Shi-gang. Preparation of Pt/H-TiO₂ Catalyst with Improved Catalytic Performance for Methanol Electrooxidation[J]. Journal of Electrochemistry, 2014, 20(2): 110-115.

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https://electrochem.xmu.edu.cn/CN/Y2014/V20/I2/110

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Pt/H-TiO₂催化剂制备及其甲醇电催化氧化性能

Preparation of Pt/H-TiO₂ Catalyst with Improved Catalytic Performance for Methanol Electrooxidation

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