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

Authors

Jin HAN, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Zhi-you ZHOU, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;Follow
Qiang WANG, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Miao-qiang LV, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Chi CHEN, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
Shi-gang SUN, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;

Corresponding Author

Zhi-you ZHOU(zhouzy@xmu.edu.cn)

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.

Graphical Abstract

Keywords

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

DOI Link

https://doi.org/10.13208/j.electrochem.130418

Publication Date

2014-04-28

Online Available Date

2014-04-17

Revised Date

2013-05-16

Received Date

2013-04-17

Recommended Citation

Jin HAN, Zhi-you ZHOU, Qiang WANG, Miao-qiang LV, Chi CHEN, Shi-gang SUN. Preparation of Pt/H-TiO₂ Catalyst with Improved Catalytic Performance for Methanol Electrooxidation[J]. Journal of Electrochemistry, 2014 , 20(2): 110-115.
DOI: 10.13208/j.electrochem.130418
Available at: https://jelectrochem.xmu.edu.cn/journal/vol20/iss2/4