Acta Chimica Sinica ›› 2012, Vol. 70 ›› Issue (11): 1257-1262.DOI: 10.6023/A1112022 Previous Articles     Next Articles

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TiO2 纳米棒载Pd 催化剂的制备及其对甲酸的电催化氧化

施毅, 李建苹, 邢俊飞, 肖梅玲, 陈煜, 周益明, 陆天虹, 唐亚文   

  1. 江苏省新型动力电池重点实验室 南京师范大学化学与材料科学学院 南京 210046
  • 投稿日期:2011-12-02 修回日期:2012-04-11 发布日期:2012-04-11
  • 通讯作者: 唐亚文
  • 基金资助:

    国家863 计划(No. 2007AA05Z143)、国家自然科学基金(No. 21073094)、NSFC-云南省联合基金(No. U1137602)及江苏高校优势学科建设工程基金资助项目.

Preparation of TiO2-Nanorods Supported Pd Catalyst and Its Electrocatalytic Oxidation on Formic Acid

Shi Yi, Li Jianping, Xing Junfei, Xiao Meiling, Chen Yu, Zhou Yiming, Lu Tianhong, Tang Yawen   

  1. Jiangsu Key Laboratory of New Power Batteries, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210046
  • Received:2011-12-02 Revised:2012-04-11 Published:2012-04-11
  • Supported by:

    Project supported by the National 863 program of China (No. 2007AA05Z143), the National Natural Science Foundation of China (No. 21073094), the United Fund of NSFC and Yunnan Province (No. U1137602) and the Priority Academic Program Development of Jiangsu Higher Education Institutions.

TiO2 nanorods (TiO2-R) and irregular TiO2 (TiO2-I) with anatase phase structure are synthesized by hydrothermal synthesis and inorganic sol gel method, respectively. Using as-prepared TiO2 as support, Pd/TiO2 catalysts are prepared by using sodium ethylenediamine tetracetate (EDTA) as complexing agent and NaBH4 as reductant. The studies of transmission electron microscopy (TEM) and X-ray diffraction (XRD) reveal that the average particle size of Pd/TiO2-R catalyst is very similar to that of Pd/TiO2-I catalyst. Cyclic voltammetry measurements show that the peak current of formic acid oxidation at Pd/TiO2-R catalyst increases by 70%. Chronoamperometric measurements indicate that the current density at the Pd/TiO2-R catalyst electrode at 3000 s is almost 16 times larger than that at the Pd/TiO2-I catalyst electrode. These electrochemical experiments show that the electrocatalytic activity and long-term operation stability of Pd/TiO2-R catalyst are much better than that of Pd/TiO2-I catalyst for formic acid oxidation in acidic media, indicating that TiO2 nanorods support material can effectively promote the electrocatalytic activity and stability of Pd catalyst for formic acid electrooxidation. Likely, TiO2 nanorods possess good electronic conductivity and abundant surface oxygen-containing groups, which improve the electrocatalytic activity and the anti-poisoned performance of Pd catalyst for the formic acid electrooxidation. Thus, TiO2 nanorods with anatase phase structure possess the potential application prospect in direct formic acid fuel cell (DFAFC).

Key words: TiO2 nanorod, irregular TiO2, Pd, catalyst, formic acid oxidation