Mesoporous crystalline metal oxide supported Au catalysts

Donghai Wang, Zhen Ma, Sheng Dai, Jun Liu, Zimin Nie

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A novel solution growth of metal oxide nanocrystals within an organized surfactant matrix was developed into mesoporous three-dimensional nanostructured frameworks with tunable mesoporosity. Mesoporous crystalline transition metal oxides, including CeO2 and TiO2, were synthesized. The new mesoporous crystalline TiO2 or CeO2-supported gold nanoparticles showed high reactivity and on-stream stability towards low-temperature CO oxidation even after treatment at 400°-500°C. The gold nanoparticles were directly deposited onto the mesoporous crystalline TiO2 or CeO2 via deposition-precipitation methods and then subjected to heat treatment of different temperatures. The 400°C-aged Au/mesoporous metal oxide catalyst remained very active, achieving 50% conversion around -45°C, which was comparable to T50 values of as-synthesized sample. Gold supported on standard TiO2 P25 and commercial CeO2 prepared under the same condition and calcined at 500°C had a much higher T50 value. Stability tests showed that high temperature-aged Au/mesoporous TiO2 or CeO2 catalyst could maintain its activity at 28°C over an extended period of time. This is an abstract of a paper presented at the 2007 AIChE Annual Meeting (Salt Lake City, UT 11/4-9/2007).

Original languageEnglish (US)
Title of host publication2007 AIChE Annual Meeting
StatePublished - Dec 1 2007
Event2007 AIChE Annual Meeting - Salt Lake City, UT, United States
Duration: Nov 4 2007Nov 9 2007

Publication series

Name2007 AIChE Annual Meeting

Other

Other2007 AIChE Annual Meeting
CountryUnited States
CitySalt Lake City, UT
Period11/4/0711/9/07

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Chemical Engineering(all)
  • Bioengineering
  • Safety, Risk, Reliability and Quality

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