Reduced graphene oxide supported V2O5-WO3-TiO2 catalysts for selective catalytic reduction of NOx

• Published in: The Korean journal of chemical engineering Vol. 35; no. 10; pp. 1988 - 1993
• Main Authors: Lee, Minwoo, Ye, Bora, Jeong, Bora, Chun, Hye-yeon, Lee, Duck Hyun, Park, Sam-sik, Lee, Heesoo, Kim, Hong-Dae
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.10.2018; Springer Nature B.V; 한국화학공학회
• Subjects: Ammonia; Biotechnology; Catalysis; Catalysts; Chemistry; Chemistry and Materials Science; Energy transmission; Fourier transforms; Graphene; Industrial Chemistry/Chemical Engineering; Infrared analysis; Materials Science; Nanoparticles; Nitrates; Nitrogen oxides; Reaction Engineering; Selective catalytic reduction; Titanium dioxide; Transmission electron microscopy; Tungsten oxides; Vanadium pentoxide; 화학공학; NOx Removal Efficiency; Wet Impregnation; Selective Catalytic Reduction; High Dispersion; Reduced Graphene Oxide
• ISSN: 0256-1115; 1975-7220
• DOI: 10.1007/s11814-018-0109-6

We present a reduced-graphene-oxide (rGO)-supported V2O 5 -WO 3 -TiO 2 (VWTi) catalysts for the efficient selective catalytic reduction of NOx. The rGO support provides well-dispersed functional sites for the nucleation of nanoparticles, allowing the formation of VWTi catalysts with high specific surface areas. The dispersion of the nanoparticles, as observed by transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS), confirmed the uniform dispersion of the particles on the rGO surface. Detailed Fourier-transform infrared (FT-IR) and NH 3 temperature-programmed desorption (NH 3 -TPD) analyses indicated that the high density of acidic sites provided by the rGO is key to the observed enhancement of NOx removal efficiency, and the rGO-supported catalysts exhibit improved NOx removal efficiencies with smaller amounts of V 2 O 5 and WO 3 compared with the commercially available V 2 O 5 -WO 3 -TiO 2 catalysts.