文献类型：期刊文献

英文题名：Enhanced catalytic performance and N 2 yield of Ag/CeO 2 catalyst by Cu modification for NVOCs removal

作者：Guo, Xiaohan[1];Lin, Fanshun[1];Gao, Meixingzi[1];Dai, Qiguang[1];Zhan, Wangcheng[1];Wang, Li[1];Guo, Yun[1];Wang, Aiyong[1];Guo, Yanglong[1]

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

年份：2024

卷号：488

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20241515901310);WOS:【SCI-EXPANDED(收录号:WOS:001237955000001)】；

基金：This work was supported by the National Key Research and Devel- opment Program of China (2023YFA1508500, 2022YFB3504200) , the National Natural Science Foundation of China (22106101, U21A20326) , and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Catalytic oxidation; Emission control; VOCs; N 2 yield; Fast SCR

摘要：5 wt% Ag/CeO 2 nanorods catalyst possesses exceptional activity in catalytic oxidation of N, N-Dimethylformamide (DMF), however, its N 2 yield is relatively low. To modify the catalytic activity and N 2 yield, Cu species were introduced to prepare a series of 5AgxCu/CeO 2 catalysts (x = 0, 1, 5, 10) by conventional incipient wetness impregnation method. Among all catalysts, 5Ag5Cu/CeO 2 catalyst exhibited the best activity (T 90 = 160 degrees C), the lowest complete oxidation temperature of organic intermediates (Tc = 240 degrees C) and tremendous stability under both dry and humid conditions. More importantly, N 2 yield of 5Ag5Cu/CeO 2 catalyst enhanced significantly from less than 80 % to 90 %, in comparison to the 5Ag0Cu/CeO 2 catalyst. According to characterization results, well -dispersed CuO species and Cu-O-Ce interfaces provided abundant active oxygen species, thus improving the activity of catalytic oxidation of DMF and organic intermediates. Besides, the introduction of Cu species also promoted the oxidation of NO, and the generation of NO 2 benefitted N 2 yield through fast SCR reaction with organic reactant and intermediate. In addition, the interaction between Ag species and CeO 2 support was also weakened after introduction of Cu species. Subsequently, metallic Ag 0 particles dominated the 5Ag5Cu/CeO 2 catalyst and enhanced the SCR performance, thus effectively increasing N 2 yield.