摘要
The design and synthesis of vanadium-based denitration catalysts with low-temperature activity pose significant challenges in the field of toxic gas catalysis.In this study,we have developed a novel approach to fabricate highly efficient V_(2)O_(5)-WO_(3)/TiO_(2)monolithic mesh catalysts for NO_(x)reduction at low temperatures.First,TiO_(2)nanosheets with strong adhesion and large surface area were grown on Ti mesh using plasma electrolytic oxidation technology and hydrothermal method.Then,super-small traces of WO_(3)and V_(2)O_(5)active nano-species were subsequently deposited on TiO_(2)nanosheets using the deposition-precipitation method.Compared to traditional ceramic-based V_(2)O_(5)-WO_(3)/TiO_(2)catalysts,our V_(2)O_(5)-WO_(3)/TiO_(2)monolithic mesh catalyst exhibits superior mechanical performance,excellent thermal conductivity,lower pressure drop,higher utilization of active components,and stronger synergistic effects.Significantly,the V_(2)O_(5)-WO_(3)/TiO_(2)monolithic mesh catalysts exhibited excellent low-temperature catalytic activity with 98%of NO_(x)conversion at 220℃,and remarkable long-term SO_(2)tolerance and water resistance in the selective catalytic reduction(SCR)of NO_(x)with NH_(3).The SCR reaction of tiny V_(2)O_(5)and WO_(3)active species supported on TiO_(2)nanosheets directly demonstrated to follow the Eley-Rideal mechanism by in situ infrared spectra.
基金
supported by the National Natural Science Foundation of China(No.52202166)
Guangdong Basic and Applied Basic Research Foundation(Nos.2022A1515011170 and 2023A1515010678)
the Fundamental Research Funds for the Central Universities(No.N2229002)
the Research and the Development Startup Foundation of Foshan Graduate School of Innovation,Northeastern University(Nos.FSNEU20201016001 and FSNEU20201016003)
the Scientific Research Project of Foshan Talents(Nos.200076622001 and 200076622004)。
