FeOx-supported gold catalysts for catalytic removal of formaldehyde at room temperature
FeOx-supported gold catalysts for catalytic removal of formaldehyde at room temperature
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FeOx负载金催化剂用于室温催化去除甲醛
DOI：
10.1016/j.apcatb.2014.02.009
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发表时间：
2014-07-01
影响因子：
22.1
通讯作者：
Shi, Chuan
中科院分区：
文献类型：
--
作者：
Chen, Bing-bing;Zhu, Xiao-bing;Shi, Chuan
采用共沉淀法（CP）制备了FeOx负载Au催化剂，考察了其对甲醛的催化氧化性能。焙烧温度对催化剂的化学性质和微观结构有很大影响。XRD、H-2-TPR和XPS表征表明，较低的焙烧温度有利于催化剂的还原性，有利于表面羟基的存在。因此，在室温和潮湿空气下，在200 ℃下煅烧的Au/FeOx催化剂提供100%的HCHO转化为CO2和H2O。原位DRIFTs研究表明，水分是必不可少的甲酸中间体深度氧化成CO2和H2O，这是催化甲醛氧化的限速步骤。(c)2014爱思唯尔有限公司版权所有。
FeOx-supported Au catalysts prepared by co-precipitation (CP) were investigated for catalytic HCHO oxidation. The applied calcination temperature was found to greatly influence both the chemical properties and microstructure of the catalysts. Characterization using XRD, H-2-TPR and XPS suggested that lower calcination temperature improves the reducibility of the catalysts, and favors the presence of surface hydroxyl groups. Consequently, an Au/FeOx catalyst calcined at 200 C afforded 100% conversion of HCHO into CO2 and H2O at room temperature and under humid air. In situ DRIFTs studies suggested that the moisture was essential for deep oxidation of the formate intermediates into CO2 and H2O, this being the rate limiting step for catalytic HCHO oxidation. (c) 2014 Elsevier B.V. All rights reserved.