Rh2O3_mesoporous MOx‐Al2O3 (M = Mn, Fe, Co, Ni.pdfVIP

Chinese Journal of Catalysis 37 (2016) 73–82? available?at?? journal?homepage:?/locate/chnjc? Article?(Special?Column?on?New?Porous?Catalytic?Materials)? Rh2O3/mesoporous MOx‐Al2O3 (M = Mn, Fe, Co, Ni, Cu, Ba) catalysts: Synthesis, characterization, and catalytic applications Huan Liu, Yi Lin, Zhen Ma * Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China ARTICLE INFO Article history: Received 29 May 2015 Accepted 3 July 2015 Published 5 January 2016 Keywords: One‐pot synthesis Mesoporous alumina Metal oxide CO oxidation N2O decomposition ? ABSTRACT ? Recently, a one‐pot self‐assembly method was proposed for the synthesis of mesoporous Al2O3 and MOx‐Al2O3 composite materials. However, few attempts have been made to use mesoporous MOx‐Al2O3 composites to support metal oxides for catalysis. In the present work, mesoporous MOx‐Al2O3 (M = Mn, Fe, Co, Ni, Cu, Ba) materials were prepared by a one‐pot self‐assembly method using Pluronic P123 as a structure‐directing agent. The obtained mesoporous materials were load‐ ? ed with Rh2O3 nanoparticles via impregnation with Rh(NO3)3 followed by calcination in air at 500 °C. The resulting catalysts were characterized by X‐ray diffraction, N2 adsorption‐desorption meas‐ urements, transmission electron microscopy, inductively coupled plasma optical emission spec‐ trometry, X‐ray photoelectron spectroscopy, and their catalytic activity and stability for CO oxida‐ tion and N2O decomposition were tested. The Rh2O3 nanoparticles were found to be on the order of 1 nm in size and were highly dispersed on the high surface area mesoporous MOx‐Al2O3 supports. A number of the Rh2O3/mesoporous MOx‐Al2O3 catalysts exhibited higher catalytic activity than the Rh2O3/mesoporous Al2O3 prepared for comparison. ? 2016, Dalian Institu