文献类型：期刊文章

作　　者：范泽云[1] 张志翔[1] 房文健[1] 姚鑫[1] 邹谷初[1] 上官文峰[1]

机构地区：[1]上海交通大学燃烧与环境技术研究中心,上海200240

出　　处：《Chinese Journal of Catalysis》

基　　金：supported by the National Natural Science Foundation of China(21577088)~~

年　　份：2016

卷　　号：37

期　　号：6

起止页码：947-954

语　　种：中文

收录情况：AJ、BDHX、BDHX2014、CAS、CSA、CSA-PROQEUST、CSCD、CSCD2015_2016、EI(收录号：20162502508441)、JST、RSC、SCI(收录号：WOS:000380868300017)、SCI-EXPANDED(收录号：WOS:000380868300017)、SCIE、SCOPUS、WOS、ZGKJHX、核心刊

摘　　要：Co3O4 catalysts prepared with different precipitants（NH3·H2O,KOH,NH4HCO3,K2CO3 and KHCO3）were investigated for the oxidation of formaldehyde（HCHO）.Among these,KHCO3-precipitated Co3O4（KHCO3-Co） was the most active low-temperature catalyst,and was able to completely oxidize HCHO at the 100-ppm level to CO2 at 90℃.In situ diffuse reflectance infrared spectroscopy demonstrated that hydroxyl groups on the catalyst surface were regenerated by K~＋ and CO3^（2-）,thus promoting the oxidation of HCHO.Moreover,H2-temperature programmed reduction and X-ray photoelectron spectroscopy showed that employing KHCO3 as the precipitant increased the Co^3＋/Co^2＋molar ratio on the surface of the Co3O4 catalyst,thus further promoting oxidation.Structural characterization revealed that catalysts precipitated with carbonate or bicarbonate reagents exhibited greater specific surface areas and pore volumes.Overall,these data suggest that the high activity observed during the Co3O4 catalyzed oxidation of HCHO can be primarily attributed to the presence of K~＋ and CO3^（2-） on the Co3O4 surface and the favorable Co^3＋/Co^2＋ ratio.

关 键 词：Formaldehyde oxidation  CATALYSIS Cobalt oxide  Precipitation method  Potassium ion  

分 类 号：X51] O643.36]