使用驻波声化学反应器（SWSR）在金红石型TiO₂上制备纳米尺寸的铂——一氧化碳催化氧化增强的观察

Fabrication of nanosized Pt on rutile TiO2 using a standing wave sonochemical reactor (SWSR)--observation of an enhanced catalytic oxidation of CO.

作者信息

Sivakumar Manickam, Towata Atsuya, Yasui Kyuichi, Tuziuti Toru, Kozuka Teruyuki, Tsujimoto Masahiko, Zhong Ziyi, Iida Yasuo

机构信息

Ultrasonic Processing Group, Advanced Manufacturing Research Institute (AMRI), National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimoshidami, Moriyama-ku, Nagoya 463-8560, Japan.

出版信息

Ultrason Sonochem. 2010 Jan;17(1):213-8. doi: 10.1016/j.ultsonch.2009.06.019. Epub 2009 Jul 5.

DOI:10.1016/j.ultsonch.2009.06.019

PMID:19632873

Abstract

Fine particles of rutile TiO2 supporting nanosized particles of Pt were prepared by a simultaneous in situ sonochemical reduction and deposition method using a standing wave sonochemical reactor (SWSR). The mean diameter of sonochemically obtained Pt particles are of 2 nm. Following this sonochemical technique, rutile TiO2 was also deposited with different weight percentages of Pt. Catalytic function of the prepared composite catalysts were tested by the oxidation of CO to CO(2). From the catalytic activity results, it has been found out that the catalysts prepared by the sonochemical method exhibited higher catalytic activity for CO oxidation, probably attributed to the higher Pt particle distribution achieved under sonication. Transmission electron microscopy (TEM), X-ray photoelectron spectra (XPS), and diffuse reflectance spectroscopy (DRS) were employed to characterize the resulting material.

摘要

采用驻波声化学反应器（SWSR），通过原位同步声化学还原和沉积法制备了负载纳米级铂颗粒的金红石型二氧化钛细颗粒。声化学法制备的铂颗粒平均直径为2nm。采用该声化学技术，还制备了不同铂含量的金红石型二氧化钛。通过将CO氧化为CO₂来测试所制备复合催化剂的催化功能。从催化活性结果可知，声化学法制备的催化剂对CO氧化表现出更高的催化活性，这可能归因于超声作用下实现了更高的铂颗粒分散度。采用透射电子显微镜（TEM）、X射线光电子能谱（XPS）和漫反射光谱（DRS）对所得材料进行表征。