文献类型：期刊文献

英文题名：Metal-Organic Framework (MOF) Template Based Efficient Pt/ZrO2@C Catalysts for Selective Catalytic Reduction of H2 Below 90 °C

作者：Wang, Qian[1];Sun, Wei[1];Xie, Tianying[1];Cao, Limei[1];Yang, Ji[1,2]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2019

卷号：14

期号：3

起止页码：416

外文期刊名：CHEMISTRY-AN ASIAN JOURNAL

收录：;EI(收录号：20190306398056);WOS:【SCI-EXPANDED(收录号:WOS:000457713300008)】；

基金：This research is based on work supported by the National Natural Science Foundation of China (no. 51778229).

语种：英文

外文关键词：metal-organic frameworks; platinum; reduction; supported catalysts; template synthesis

摘要：Selective catalytic reduction (SCR) of NOx with H-2 as a reductant is the most promising denitration technology at low temperature. Achieving the conversion of NOx into N-2 at ambient temperature not only prolongs the service life of the catalyst, but also provides more freedom for the arrangement of denitration units throughout the flue gas treatment equipment. However, the development of highly efficient, stable, and environmentally benign supported platinum-based catalysts for H-2-SCR at ambient temperature is still a major challenge. Herein, a 0.5 wt % Pt/ZrO2@C catalyst, which was composed of carbon-coated octahedral ZrO2 with highly dispersed Pt particles, was prepared by using a new stabilization strategy based on UiO-66-NH2 (a zirconium metal-organic framework) as a template. The catalytic performance of this Pt/ZrO2@C in H-2-SCR was tested and confirmed to achieve near 100 % NOx conversion at 90 degrees C. Also, 70 % N-2 selectivity of the catalyst was achieved. The morphology, structure, and porous properties of the as-synthesized nanocomposites were characterized by using data obtained from field-emission SEM, TEM, XRD, Raman spectroscopy, thermogravimetric analysis, X-ray photoelectron spectroscopy, and N-2 adsorption-desorption isotherms. The results show that residual carbon formed by pyrolysis treatment is coated on octahedral ZrO2, and effectively prevents the agglomeration of platinum particles on the surface.