Time-resolved observation of V2O5/TiO2 in NH3-SCR reveals the equivalence of Bronsted and Lewis acid sites

被引：23

作者：

Song, Inhak ^{[1
]}

Lee, Hwangho ^{[1
]}

Jeon, Se Won ^{[1
]}

Kim, Taejin ^{[2
]}

Kim, Do Heui ^{[1
]}

机构：

[1] Seoul Natl Univ, Inst Chem Proc, Sch Chem & Biol Engn, Seoul 08826, South Korea

[2] SUNY Stony Brook, Mat Sci & Chem Engn Dept, Stony Brook, NY 11794 USA

来源：

CHEMICAL COMMUNICATIONS | 2020年 / 56卷 / 98期

基金：

新加坡国家研究基金会;

关键词：

SELECTIVE CATALYTIC-REDUCTION; VANADIA-TITANIA CATALYSTS; METAL-OXIDE CATALYSTS; NITRIC-OXIDE; TIO2-SUPPORTED VANADIA; ACTIVE-SITES; FT-IR; SCR; AMMONIA; NO;

D O I：

10.1039/d0cc06006b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The involvement of Lewis and Bronsted acid sites on V2O5/TiO2 catalyst in the selective catalytic reduction of NO with NH3 (NH3-SCR) is under debate. Here, a Li doping strategy is applied to selectively block Bronsted sites, which aims to prepare model catalysts with the same V loading but different ratios of the two acid sites. Time-resolved in situ DRIFTS observation demonstrates that the surface ammonia species pre-adsorbed on Lewis and Bronsted sites can participate equally in the reaction. Consideration of site redistribution in the early stages of the transient reaction is key to accurate measurement of the ammonia consumption rate.

引用

页码：15450 / 15453

页数：4

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