物理化学学报 >> 2015, Vol. 31 >> Issue (12): 2310-2315.doi: 10.3866/PKU.WHXB201510162

电化学和新能源 上一篇    下一篇

钙钛矿型复合氧化物CaVO3的制备及对氧还原反应的电催化性能

陈凤英1,2,肖丽1,*(),杨翠霞1,庄林1,*()   

  1. 1 武汉大学化学与分子科学学院,武汉430072
    2 商洛学院化学工程与现代材料学院/陕西省尾矿综合利用重点实验室,陕西商洛726000
  • 收稿日期:2015-07-13 发布日期:2015-12-04
  • 通讯作者: 肖丽,庄林 E-mail:chem.lily@whu.edu.cn;lzhuang@whu.edu.cn
  • 基金资助:
    国家自然科学基金(21273171);商洛市科技计划基金(SK2014-01-09)

Preparation and Electrocatalytic Properties of Perovskite Type Oxides CaVO3 for Oxygen Reduction Reaction

Feng-Ying. CHEN1,2,Li. XIAO1,*(),Cui-Xia. YANG1,Lin. ZHUANG1,*()   

  1. 1 College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China
    2 College of Chemical Engineering and Modern Materials/Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources, Shangluo University, Shangluo 726000, Shaanxi Province, P. R. China
  • Received:2015-07-13 Published:2015-12-04
  • Contact: Li. XIAO,Lin. ZHUANG E-mail:chem.lily@whu.edu.cn;lzhuang@whu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21273171);Technology Plan Projects of Shangluo, China(SK2014-01-09)

摘要:

以五氧化二钒、硝酸钙、柠檬酸和草酸为原料,采用溶胶-凝胶法制备出CaVO3的前驱体,在氩气保护下1000 ℃煅烧2 h,成功制备出目标产物CaVO3.对前驱体和目标产物分别进行了傅里叶变换红外(FTIR)光谱、热重(TG)分析、X射线衍射(XRD)和电导率等表征.在1 mol·L-1的KOH电解质溶液中测试了样品的氧还原反应(ORR)催化性能.结果表明,修饰电极上(ORR)的电子转移数是1.5-1.7,发生的是2电子还原.

关键词: 钙钛矿, 溶胶-凝胶法, 氧还原

Abstract:

The precursor powder of CaVO3 was prepared by sol-gel method using vanadium pentoxide, calcium nitrate, citric acid, and oxalic acid as raw materials. The target product CaVO3 was obtained by calcining the precursor powder in argon atmosphere at 1000 ℃. In order to determine the appropriate calcination temperature, thermal stability of the precursor powder was tested. The target product CaVO3 was characterized by Fourier transform infrared (FTIR) spectrometry, thermogravimetry (TG), X-ray diffraction (XRD), and conductivity. In addition, the properties for oxygen reduction reaction (ORR) were also investigated, and the results showed that the electron transfer number of ORR on the modified electrode was 1.5-1.7, which indicating that ORR was a two-electron process.

Key words: Perovskite, Sol-gel method, Oxygen reduction reaction

MSC2000: 

  • O643