Preparation of birnessite-supported Pt nanoparticles and their application in catalytic oxidation of formaldehyde

查看全文 作　　者：Linlin [1,2]Liu;Hua [1]Tian;Junhui [1]He;Donghui [3]Wang;Qiaowen [2]Yang

机构地区：[1]Functional Nanomaterials Laboratory and Key Laboratory of Photochemical Conversion and Optoelectronic Materials,Technical Institute of Physics and Chemistry(TIPC),Chinese Academy of Sciences,Beijing 100190,China;[2]School of Chemical&Environmental Engineering,China University of Mining&Technology,Beijing 100083,China;[3]Research Institute of Chemical Defense,Beijing 100083,China

出　　处：《Journal of Environmental Sciences》索引2012年第24卷第6期,共8页

基　　金：supported by the National Natural Science Foundation of China (No. 20871118,21007076);the Knowledge Innovation Program of the Chinese Academy of Sciences (CAS) (No. KSCX2-YW-G-059);the National Basic Research Program (973) of China (No.2010CB934103);the 'Hundred Talents Program' of CAS 摘　　要：Flaky and nanospherical birnessite and birnessite-supported Pt catalysts were successfully prepared and characterized by means of Xray diffraction (XRD),transmission electron microscopy (TEM),energy dispersive spectroscopy (EDS) and N2 adsorption-desorption.Effects of the birnessite morphology and Pt reduction method on the catalytic activity for the complete oxidation of formaldehyde (HCHO) were investigated.It was found that flaky birnessite exhibited higher catalytic activity than nanospherical birnessite.The promoting effect of Pt on the birnessite catalyst indicated that the reduction method of the Pt precursor greatly influenced the catalytic performance.Flaky birnessite-supported Pt nanoparticles reduced by KBH 4 showed the highest catalytic activity and could completely oxidize HCHO into CO2 and H2O at 50℃,whereas the sample reduced using H2-plasma showed lower activity for HCHO oxidation.The differences in catalytic activity of these materials were jointly attributed to the effects of pore structure,surface active sites exposed to HCHO and the dispersion of Pt nanoparticles. 关键词：PT纳米粒子水钠锰矿催化氧化甲醛制备透射电子显微镜 PT催化剂铂纳米粒子

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Preparation of birnessite-supported Pt nanoparticles and their application in catalytic oxidation of formaldehyde

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