title: Uniformly active phase loaded selective catalytic reduction catalysts (V2O5/TNTs) with superior alkaline resistance performance.
abstract: In this work, protonated titanate nanotubes was performed as a potential useful support and different vanadium precursors (NH4VO3and VOSO4) were used to synthesize deNOxcatalysts. The results showed that VOSO4exhibited better synergistic effect with titanate nanotubes than NH4VO3, which was caused by the ion-exchange reaction. Then high loading content of vanadium, uniformly active phase distribution, better dispersion of vanadium, more acid sites, better V5+/V4+redox cycles and superior oxygen mobility were achieved. Besides, VOSO4-based titanate nanotubes catalysts also showed enhanced alkaline resistance than particles (P25) based catalysts. It was strongly associated with its abundant acid sites, large surface area, flexible redox cycles and oxygen transfer ability. For the loading on protonated titanate nanotubes, active metal with cation groups was better precursors than anion ones. V2O5/TNTs catalyst was a promising substitute for the commercial vanadium catalysts and the work conducted herein provided a useful idea to design uniformly active phase loaded catalyst.
authors.affiliation: Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resources Science, Zhejiang University, 310058 Hangzhou, PR China; Zhejiang Provincial Engineering Research Center of Industrial Boiler & Furnace Flue Gas Pollution Control, Hangzhou 310027, PR China.
authors.forename: Haiqiang
authors.initials: H
authors.lastname: Wang
authors.affiliation: Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resources Science, Zhejiang University, 310058 Hangzhou, PR China; Zhejiang Provincial Engineering Research Center of Industrial Boiler & Furnace Flue Gas Pollution Control, Hangzhou 310027, PR China.
authors.forename: Penglu
authors.initials: P
authors.lastname: Wang
authors.affiliation: South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, PR China.
authors.forename: Xiongbo
authors.initials: X
authors.lastname: Chen
authors.affiliation: Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resources Science, Zhejiang University, 310058 Hangzhou, PR China; Zhejiang Provincial Engineering Research Center of Industrial Boiler & Furnace Flue Gas Pollution Control, Hangzhou 310027, PR China. Electronic address: zbwu@zju.edu.cn.
authors.forename: Zhongbiao
authors.initials: Z
authors.lastname: Wu
keywords: Alkaline poisoning; Ion-exchange; SCR; Titanate nanotubes; Vanadium