Kim, J. Nam, K.B. Ha, H.P. 2024-01-19T14:03:31Z 2024-01-19T14:03:31Z 2021-09-02 2021-08 0304-3894 https://pubs.kist.re.kr/handle/201004/116666 TiO2-supported antimony oxide-vanadium oxide-cerium oxide (SVC) imparts Lewis acidic (L)/Br？nsted acidic (B) sites, labile (Oα)/mobile oxygens (OM), and oxygen vacancies (OV) for selective catalytic NOX reduction (SCR). However, these species are harmonious occasionally, readily poisoned by H2O/sulfur/phosphorus/carbon, thus limiting SCR performance of SVC. Herein, a synthetic means is reported for immobilizing HSOA-/SOA2- (A= 3？4) or H3？BPO4B- (B= 1？3) on the L sites of SVC to form SVC-S and SVC-P. HSOA-/SOA2-/H3？BPO4B- acted as additional B sites with distinct characteristics, altered the properties of Oα/OM/OV species, thereby affecting the SCR activities and performance of SVC-S and SVC-P. SVC-P activated Langmuir-Hinshelwood-typed SCR better than SVC-S, as demonstrated by a greater Oα-directed pre-factor and smaller binding energy between Oα and NO. Meanwhile, SVC-S provided a larger B-directed pre-factor, thereby outperforming SVC-P in activating Eley-Rideal-typed SCR that dictated the overall SCR activities. Compared with SVC-S, SVC-P contained fewer OV species, yet, had higher OM mobility, thus enhancing the overall redox cycling feature, while providing greater Br？nsted acidity. Consequently, the resistance of SVC-P to H2O or soot were greater than or similar to that of SVC-S. Conversely, SVC-S revealed greater tolerance to hydro-thermal aging and SO2 than SVC-P. This study highlights the pros and cons of HSOA-/SOA2-/H3？BPO4B- functionalities in tailoring the properties of metal oxides in use as SCR catalysts. ？ 2021 The Authors English Elsevier B.V. Comparative study of HSOA-/SOA2- versus H3-BPO4B- functionalities anchored on TiO2-supported antimony oxide-vanadium oxide-cerium oxide composites for low-temperature NOX activation Article 10.1016/j.jhazmat.2021.125780 1 Journal of Hazardous Materials, v.416 Journal of Hazardous Materials 416 Y scie scopus 000664795200003 2-s2.0-85104086742 Engineering, Environmental Environmental Sciences Engineering Environmental Sciences & Ecology Article Antimony compounds Binding energy Nitrogen oxides Reduction Temperature Thermal aging Titanium dioxide Antimony oxides Cerium oxides Energy H3？BPO4B- functionality HSOA-/SOA2- functionality NOX consumption rate Pre-factor Selective catalytic NOX reduction TiO$-2$ Vanadium oxides Activation energy antimony cerium oxide metal oxide nitric oxide titanium dioxide vanadium antimony catalysis catalyst comparative study composite hydrothermal system performance assessment soot Article bulk density catalyst comparative study controlled study diffuse reflectance infrared Fourier transform spectroscopy flow rate ion chromatography kinetic parameters Langmuir Blodgett film low temperature particle size pore volume retention time stereospecificity surface area surface property synthesis thermal conductivity transmission electron microscopy X ray diffraction X ray fluorescence Activation energy H3？BPO4B- functionality HSOA-/SOA2- functionality NOX consumption rate Pre-factor Selective catalytic NOX reduction