文献类型：期刊文献

英文题名：Crystal-facet-dependent activity and N2 yield of Ag/CeO2 catalysts for catalytic oxidation of N, N-Dimethylformamide

作者：Guo, Xiaohan[1];Dong, Chenxiao[1];Gao, Meixingzi[1];Ye, Dongsheng[1];Dai, Qiguang[1];Zhan, Wangcheng[1];Wang, Zhiqiang[1];Wang, Li[1];Wang, Aiyong[1];Guo, Yun[1];Guo, Yanglong[1]

机构：[1]East China Univ Sci & Technol, Res Inst Ind Catalysis, State Key Lab Green Chem Engn & Ind Catalysis, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：341

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY

收录：;EI(收录号：20234014817783);WOS:【SCI-EXPANDED(收录号:WOS:001089436200001)】；

语种：英文

外文关键词：Catalytic oxidation; NVOCs; DMF; Ceria morphology; N2 yield

摘要：Shape-controlled CeO2 with different exposed crystal facets, CeO2 nanorods (110) and (100), nanocubes (100) and nano-octahedrons (111), were prepared as supports of Ag and then the catalytic oxidation of N, N-dime-thylformamide (DMF) was investigated. Ag/CeO2 nanorod (Ag/r-Ce) catalyst exhibits better dispersion of Ag species due to the abundant oxygen vacancies of CeO2 (110) with outstanding anchoring effect, meanwhile, more Ag-O-Ce interfaces and Ag+ species are achieved because of the strong metal-support interaction and easy migration of oxygen species between Ag and CeO2 (110). Ag/r-Ce catalyst exhibits excellent catalytic activity (T90 =158 degrees C), 100% yield of CO2 at 240 degrees C, 80% yield of N2 in the temperature range of 237-400 degrees C, unex-ceptionable H2O-resistance, high stability at 240 degrees C for 120 h. In situ DRIFTS reveals that the dissociation of (O) C-N bond is firstly involved in DMF oxidation, and then the stepwise and repeated dehydrogenation of -N(CH3)2 and the insertion reaction of surface lattice oxygen occurs. Meanwhile the formed-HCO is completely oxidized into CO2 and H2O by surface adsorbed oxygen species and the two adjacent-NH2 species combines into N2.