NO oxidation over nitrogen doped carbon xerogels
NO oxidation over nitrogen doped carbon xerogels
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DOI：
10.1016/j.apcatb.2012.06.009
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发表时间：
2012-08
影响因子：
22.1
通讯作者：
J. Sousa;M. Pereira;J. Figueiredo
中科院分区：
文献类型：
--
作者：
J. Sousa;M. Pereira;J. Figueiredo
以三聚氰胺和尿素为氮源，以含氮聚合物为前驱体，采用溶胶-凝胶法制备了碳干凝胶。制备了不同含氮量的材料，并将其用作室温下NO氧化的催化剂。氮掺杂的碳干凝胶获得的NO转化率是相当高的，表明碳干凝胶是NO氧化的有效催化剂。当NO初始浓度为1000 ppm，O_2为20%时，NO的转化率最高可达88%。含氮的表面基团的存在下，有利于NO的NO2的氧化。催化剂的催化活性在连续运行中得以保持。
Carbon xerogels were prepared from a nitrogen-containing polymer precursor, using melamine and urea as nitrogen sources incorporated into the polymer matrix, by the sol–gel process. Materials with different contents of nitrogen were obtained and used as catalysts for NO oxidation at room temperature. The NO conversions obtained with nitrogen doped carbon xerogels were quite high, showing that carbon xerogels are efficient catalysts for NO oxidation. A maximum of 88% conversion for NO was obtained at NO initial concentration of 1000ppm and 20% of O2. The presence of nitrogen-containing surface groups was shown to favour the oxidation of NO to NO2. The catalytic activity of the catalysts is maintained in consecutive runs.