Prev. Article Next Article Table of Contents

Article

Correlation Cataluminescence (CTL) Property with Reactivity of Hydrothermally Synthesized La_0.8Sr_0.2MnO₃ Cubes and CTL as a Rapid Mode of Screening Catalyst

Your current credentials do not allow retrieval of the full text.

Purchase the full-text

PDF/HTML,
figures/images,
references and tables,
(where available)

Fei Teng*^†^‡^§, Wenqing Yao^‡, Yongfa Zhu*^‡, Mindong Chen^†, Ranhui Wang^†, Sun-il Mho and Dennis Desheng Meng*^§

Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China, Department of Mechanical Engineering−Engineering Mechanics, Michigan Technological University, Houghton, Michigan 49931, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, P.R. China, and Division of Energy System research, Ajou University, Suwon 443-749, Korea

J. Phys. Chem. C, 2009, 113 (8), pp 3089–3095

DOI: 10.1021/jp711773w

Publication Date (Web): January 30, 2009

* Corresponding authors. F.T.: tel, (+86)25-5873-1090; e-mail, tfwd@163.com. Y.Z.: tel, (+86)10-6278-7601; e-mail, zhuyf@mail.tsinghua.edu.cn. D.D.M.: tel, (+1)906-4873551; e-mail, dmeng@mtu.edu., †

Tsinghua University.

, ‡

Michigan Technological University.

, §

Nanjing University of Information Science & Technology.

Ajou University.

Section:

Catalysis, Reaction Kinetics, and Inorganic Reaction Mechanisms

Abstract

La_0.8Sr_0.2MnO₃ cubes and nanoparticles were prepared by hydrothermal and citrate methods, respectively. Their cataluminescence (CTL) properties and catalytic reaction activities for CO were mainly investigated. The samples were characterized by XRD, SEM, TEM, LRS, BET, CO-TPD, O₂-TPD, and H₂-TPR, etc. It was found that both crystal structure and surface area of the catalyst play the important roles in CO oxidation. Before being calcined at high temperatures, La_0.8Sr_0.2MnO₃ nanoparticles showed the higher CTL intensity and catalytic activity for CO oxidation than the cubes, in which the effect of BET area of the catalyst on the catalytic properties is obvious; after being calcined at high temperatures, nevertheless, the cubes showed a higher CTL intensity and catalytic activity than the particles, in which the crystal structure played a significant role in CO oxidation. Most importantly, the CTL intensity of the catalyst was well correlated with the catalytic reaction activity (CO conversion or apparent reaction rate). A CTL mode could be used as a rapid method for screening catalyst activity.