2026-10-12T06:34:31Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34021306 2026-09-29T05:05:14Z category_1 category_4 category_146 category_12 category_24 category_272 category_873 category_734 portal_63 item_type_6 month_year_09_2026

Effect of Silica on Nitrate-Incorporated Vanadia Catalysts in Low-Temperature Selective Catalytic Reduction of Nitrogen Oxides Gibum Kwon (1649056) Shin Ae Song (14160428) Duck Hyun Lee (1649053) Biophysics Biochemistry Space Science Cell Biology Evolutionary Biology Environmental Sciences not elsewhere classified Chemical Sciences not elsewhere classified Biological Sciences not elsewhere classified findings clearly demonstrate 180 ° c severe physical detachment least 80 h incorporated vanadia catalysts highly active nitrate 2 </ sub x </ powder catalysts physical peeling successfully preventing structural binder removal efficiency removal efficiencies previous development optimized catalyst often results mechanical adhesion maintaining consistent incorporated v efficiency loss effectively bridging dry conditions 10 wt 10 vol Developing shaped catalysts for the low-temperature selective catalytic reduction (SCR) of NO_<i>x</i> often results in severe physical detachment and efficiency loss. Building on our previous development of highly active nitrate-incorporated V₂O₅–WO₃/TiO₂ powder catalysts, we investigated the effect of SiO₂ as a structural binder for coating these catalysts onto glass fiber sheets. Coatings with 0–30 wt % SiO₂ were prepared and evaluated. The addition of 10 wt % SiO₂ significantly improved catalyst dispersion, coating uniformity, and mechanical adhesion, successfully preventing the structural degradation typically observed under highly humid operating conditions. Consequently, the SiO₂-containing catalyst demonstrated enhanced physical stability, maintaining consistent NO_<i>x</i> removal efficiencies for at least 80 h, whereas the SiO₂-free coating showed progressive deactivation due to physical peeling. The optimized catalyst (10 wt % SiO₂, 4 wt % V₂O₅) achieved a 98.7% NO_<i>x</i> removal efficiency at 180 °C under dry conditions and 95.2% in the presence of 10 vol % H₂O. These findings clearly demonstrate that SiO₂ acts as an exceptionally robust structural binder, effectively bridging the gap between highly active fundamental powders and macroscopically stable industrial applications. 2026-09-29T00:00:00Z Text Journal contribution 10.1021/acsomega.6c06102.s001 https://figshare.com/articles/journal_contribution/Effect_of_Silica_on_Nitrate-Incorporated_Vanadia_Catalysts_in_Low-Temperature_Selective_Catalytic_Reduction_of_Nitrogen_Oxides/34021306 CC BY-NC 4.0