Selective Catalytic Reduction of NO by NH3 with WO3-TiO2 Catalysts: Influence of Catalyst Synthesis Method

He, Yuanyuan; Ford, Michael E.; Zhu, Minghui; Liu, Qingcai; Wu, Zili; Wachs, Israel E.

doi:10.1016/j.apcatb.2016.01.072

Selective Catalytic Reduction of NO by NH₃ with WO₃-TiO₂ Catalysts: Influence of Catalyst Synthesis Method

Journal Article · Tue Feb 02 04:00:00 EST 2016 · Applied Catalysis. B, Environmental

DOI:https://doi.org/10.1016/j.apcatb.2016.01.072· OSTI ID:1295096

He, Yuanyuan ^[1]; Ford, Michael E. ^[2]; Zhu, Minghui ^[2]; Liu, Qingcai ^[3]; Wu, Zili ^[4]; Wachs, Israel E. ^[2]

Lehigh Univ., Bethlehem, PA (United States). Operando Molecular Spectroscopy & Catalysis Lab., Dept. of Chemical & Biomolecular Engineering; Chongqing Univ., Chongqing (China). College of Materials Science and Engineering
Lehigh Univ., Bethlehem, PA (United States). Operando Molecular Spectroscopy & Catalysis Lab., Dept. of Chemical & Biomolecular Engineering
Chongqing Univ., Chongqing (China). College of Materials Science and Engineering
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)

A series of supported WO₃/TiO₂ catalysts was prepared by a new synthesis procedure involving co-precipitation of an aqueous TiO(OH)₂ and (NH₄)₁₀W₁₂O₄₁*5H₂O slurry under controlled pH conditions. The morphological properties, molecular structures, surface acidity and surface chemistry of the supported WO₃/TiO₂ catalysts were determined with BET, in situ Raman, in situ IR and temperature-programmed surface reaction (TPSR) spectroscopy, respectively. Isotopic ¹⁸O-¹⁶O exchange demonstrated that tungsten oxide was exclusively present as surface WO_x species on the TiO₂ support with mono-oxo W=O coordination. In contrast to previous studies employing impregnation synthesis that found only surface one mono-oxo O=WO₄ site on TiO₂, the co-precipitation procedure resulted in the formation of two distinct surface WO_x species: mono-oxo O=WO₄ (~1010-1017 cm^-1) on low defect density patches of TiO₂ and a second mono-oxo O=WO₄ (~983-986 cm^-1) on high defect density patches of TiO₂. The concentration of the second WO_x surface species increases as a function of solution pH. Both surface WOx sites, however, exhibited the same NO/NH₃ SCR reactivity. The co-precipitated WO₃-TiO₂ catalysts synthesized in alkaline solutions exhibited enhanced performance for the NO/NH₃ SCR reaction that is ascribed to the greater number of surface defects on the resulting TiO2 support. For the co-precipitated catalyst prepared at pH10, surface NH₄⁺ species on Br nsted acid sites were found to be more reactive than surface NH₃* species on Lewis acid sites for SCR of NO with NH₃.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS); Energy Frontier Research Centers (EFRC) (United States). Center for Understanding and Control of Acid Gas-induced Evolution of Materials for Energy (UNCAGE-ME)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC05-00OR22725; SC0012577

OSTI ID:: 1295096

Alternate ID(s):: OSTI ID: 1358764

Journal Information:: Applied Catalysis. B, Environmental, Journal Name: Applied Catalysis. B, Environmental Vol. 188; ISSN 0926-3373

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (60)

Dynamics of the SCR-DeNOx reaction by the transient-response method Lietti, Luca; Nova, Isabella; Camurri, Stefano AIChE Journal, Vol. 43, Issue 10 https://doi.org/10.1002/aic.690431017	journal	October 1997
Resolving the Atomic Structure of Vanadia Monolayer Catalysts: Monomers, Trimers, and Oligomers on Ceria Baron, Martin; Abbott, Heather; Bondarchuk, Oleksandr Angewandte Chemie International Edition, Vol. 48, Issue 43 https://doi.org/10.1002/anie.200903085	journal	October 2009
The Raman spectrum of brookite, TiO2 (Pbca, Z = 8) Tompsett, G. A.; Bowmaker, G. A.; Cooney, R. P. Journal of Raman Spectroscopy, Vol. 26, Issue 1 https://doi.org/10.1002/jrs.1250260110	journal	January 1995
Differentiation of mono-oxo and polyoxo and of monomeric and polymeric vanadate, molybdate and tungstate species in metal oxide catalysts by IR and Raman spectroscopy Busca, Guido Journal of Raman Spectroscopy, Vol. 33, Issue 5 https://doi.org/10.1002/jrs.867	journal	January 2002
Vanadia/Titania Catalysts for Selective Catalytic Reduction (SCR) of Nitric-Oxide by Ammonia Topsoe, N. Y.; Topsoe, H.; Dumesic, J. A. Journal of Catalysis, Vol. 151, Issue 1 https://doi.org/10.1006/jcat.1995.1024	journal	January 1995
Vanadia-Titania Catalysts for Selective Catalytic Reduction of Nitric-Oxide by Ammonia Topsoe, N. Y.; Dumesic, J. A.; Topsoe, H. Journal of Catalysis, Vol. 151, Issue 1 https://doi.org/10.1006/jcat.1995.1025	journal	January 1995
IR Spectroscopic Study of the Skeletal Isomerization of Butene by Alumina-Supported Tungsten Oxide Catalysts Meijers, S.; Gielgens, L. H.; Ponec, V. Journal of Catalysis, Vol. 156, Issue 1 https://doi.org/10.1006/jcat.1995.1240	journal	September 1995
WOx/TiO2Catalysts Prepared by Grafting of Tungsten Alkoxides: Morphological Properties and Catalytic Behavior in the Selective Reduction of NO by NH3 Engweiler, J.; Harf, J.; Baiker, A. Journal of Catalysis, Vol. 159, Issue 2 https://doi.org/10.1006/jcat.1996.0087	journal	April 1996
Photocatalytic Behavior of WO3-Loaded TiO2 in an Oxidation Reaction Tae Kwon, Young; Yong Song, Kang; In Lee, Wan Journal of Catalysis, Vol. 191, Issue 1 https://doi.org/10.1006/jcat.1999.2776	journal	April 2000
Characterization of tungsten oxide supported on TiO2 and activity for acid catalysis Sohn, Jong Rack; Bae, Jung Hoon Korean Journal of Chemical Engineering, Vol. 17, Issue 1 https://doi.org/10.1007/BF02789259	journal	January 2000
Acidic properties of supported niobium oxide catalysts: An infrared spectroscopy investigation Datka, J. Journal of Catalysis, Vol. 135, Issue 1 https://doi.org/10.1016/0021-9517(92)90279-Q	journal	May 1992
Surface and catalytic properties of Vanadia-Titania and Tungsta-Titania systems in the Selective Catalytic Reduction of nitrogen oxides Lietti, L.; Svachula, J.; Forzatti, P. Catalysis Today, Vol. 17, Issue 1-2 https://doi.org/10.1016/0920-5861(93)80016-T	journal	May 1993
Reactivity of V2O5-WO3/TiO2 catalysts in the selective catalytic reduction of nitric oxide by ammonia Lietti, L.; Alemany, J. L.; Forzatti, P. Catalysis Today, Vol. 29, Issue 1-4 https://doi.org/10.1016/0920-5861(95)00250-2	journal	May 1996
Physical and chemical characterization of surface vanadium oxide supported on titania: influence of the titania phase (anatase, rutile, brookite and B) Deo, Goutam; Turek, Andrzej M.; Wachs, Israel E. Applied Catalysis A: General, Vol. 91, Issue 1 https://doi.org/10.1016/0926-860X(92)85176-C	journal	November 1992
Conversion of 1-butene over WO3-TiO2 Catalysts Patrono, Pasquale; La Ginestra, Aldo; Ramis, Gianguido Applied Catalysis A: General, Vol. 107, Issue 2 https://doi.org/10.1016/0926-860X(94)85159-X	journal	January 1994
Surface structures of supported tungsten oxide catalysts under dehydrated conditions Kim, Du Soung; Ostromecki, Marlene; Wachs, Israel E. Journal of Molecular Catalysis A: Chemical, Vol. 106, Issue 1-2 https://doi.org/10.1016/1381-1169(95)00186-7	journal	March 1996
Acidity of WOx/TiO2 Catalysts for Selective Catalytic Reduction (SCR) Hilbrig, F.; Schmelz, H.; Knözinger, H. Studies in Surface Science and Catalysis https://doi.org/10.1016/S0167-2991(08)64456-0	book	January 1993
Thermal stability of vanadia-tungsta-titania catalysts in the SCR process Madia, G.; Elsener, M.; Koebel, M. Applied Catalysis B: Environmental, Vol. 39, Issue 2 https://doi.org/10.1016/S0926-3373(02)00099-1	journal	November 2002
An FT-IR study of ammonia adsorption and oxidation over anatase-supported metal oxides Amores, JosèManuel Gallardo; Escribano, Vicente Sanchez; Ramis, Gianguido Applied Catalysis B: Environmental, Vol. 13, Issue 1 https://doi.org/10.1016/S0926-3373(96)00092-6	journal	September 1997
Chemical and mechanistic aspects of the selective catalytic reduction of NO by ammonia over oxide catalysts: A review Busca, Guido; Lietti, Luca; Ramis, Gianguido Applied Catalysis B: Environmental, Vol. 18, Issue 1-2 https://doi.org/10.1016/S0926-3373(98)00040-X	journal	September 1998
The effect of metal oxide additives on the activity of V2O5/TiO2 catalysts for the selective catalytic reduction of nitric oxide by ammonia Amiridis, Michael D.; Duevel, Robert V.; Wachs, Israel E. Applied Catalysis B: Environmental, Vol. 20, Issue 2 https://doi.org/10.1016/S0926-3373(98)00101-5	journal	February 1999
Redox and acid reactivity of wolframyl centers on oxide carriers: Brønsted, Lewis and redox sites Gutiérrez-Alejandre, Aı́da; Castillo, Perla; Ramı́rez, Jorge Applied Catalysis A: General, Vol. 216, Issue 1-2 https://doi.org/10.1016/S0926-860X(01)00557-9	journal	August 2001
Present status and perspectives in de-NOx SCR catalysis Forzatti, Pio Applied Catalysis A: General, Vol. 222, Issue 1-2 https://doi.org/10.1016/S0926-860X(01)00832-8	journal	December 2001
Preparation of selective catalytic reduction catalysts via milling and thermal spreading Jentoft, F. C.; Schmelz, Helmut; Knözinger, Helmut Applied Catalysis A: General, Vol. 161, Issue 1-2 https://doi.org/10.1016/S0926-860X(97)00050-1	journal	November 1997
Vanadia and tungsta grafted on TiO2: influence of the grafting sequence on structural and chemical properties Reiche, M. A.; Bürgi, T.; Baiker, A. Applied Catalysis A: General, Vol. 198, Issue 1-2 https://doi.org/10.1016/S0926-860X(99)00509-8	journal	May 2000
Photocatalytic activity of WOx-TiO2 under visible light irradiation Li, X. Z.; Li, F. B.; Yang, C. L. Journal of Photochemistry and Photobiology A: Chemistry, Vol. 141, Issue 2-3 https://doi.org/10.1016/S1010-6030(01)00446-4	journal	July 2001
The influence of metal oxide additives on the molecular structures of surface tungsten oxide species on alumina. II. In situ conditions Ostromecki, Marlene M.; Burcham, Loyd J.; Wachs, Israel E. Journal of Molecular Catalysis A: Chemical, Vol. 132, Issue 1 https://doi.org/10.1016/S1381-1169(97)00227-6	journal	May 1998
Influence of calcination treatment on the structure of grafted WOx species on titania Scholz, A.; Schnyder, B.; Wokaun, A. Journal of Molecular Catalysis A: Chemical, Vol. 138, Issue 2-3 https://doi.org/10.1016/S1381-1169(98)00162-9	journal	February 1999
WO3–TiO2 monolithic catalysts for high temperature SCR of NO by NH3: Influence of preparation method on structural and physico-chemical properties, activity and durability Kobayashi, Motonobu; Miyoshi, Katsunori Applied Catalysis B: Environmental, Vol. 72, Issue 3-4 https://doi.org/10.1016/j.apcatb.2006.11.007	journal	March 2007
Flame-made WO3/TiO2 nanoparticles: Relation between surface acidity, structure and photocatalytic activity Akurati, Kranthi K.; Vital, Andri; Dellemann, Jean-Philippe Applied Catalysis B: Environmental, Vol. 79, Issue 1 https://doi.org/10.1016/j.apcatb.2007.09.036	journal	February 2008
Catalysis science of the solid acidity of model supported tungsten oxide catalysts Wachs, Israel E.; Kim, Taejin; Ross, Elizabeth I. Catalysis Today, Vol. 116, Issue 2 https://doi.org/10.1016/j.cattod.2006.02.085	journal	August 2006
Systematic mechanism study of the high temperature SCR of NO by NH3 over a W/TiO2 catalyst Moon Lee, Sang; Su Kim, Sung; Chang Hong, Sung Chemical Engineering Science, Vol. 79 https://doi.org/10.1016/j.ces.2012.05.032	journal	September 2012
Synthesis of WO3/TiO2 nanocomposites via sol–gel method Yang, Huaming; Shi, Rongrong; Zhang, Ke Journal of Alloys and Compounds, Vol. 398, Issue 1-2 https://doi.org/10.1016/j.jallcom.2005.02.002	journal	August 2005
Molecular structure and catalytic activity of V2O5/TiO2 catalysts for the SCR of NO by NH3: In situ Raman spectra in the presence of O2, NH3, NO, H2, H2O, and SO2 Giakoumelou, I.; Fountzoula, C.; Kordulis, C. Journal of Catalysis, Vol. 239, Issue 1 https://doi.org/10.1016/j.jcat.2006.01.019	journal	April 2006
Molecular/electronic structure–surface acidity relationships of model-supported tungsten oxide catalysts Kim, T.; Burrows, A.; Kiely, C. Journal of Catalysis, Vol. 246, Issue 2 https://doi.org/10.1016/j.jcat.2006.12.018	journal	March 2007
The interfacial chemistry of the impregnation step involved in the preparation of tungsten(VI) supported titania catalysts Panagiotou, George D.; Petsi, Theano; Bourikas, Kyriakos Journal of Catalysis, Vol. 262, Issue 2 https://doi.org/10.1016/j.jcat.2009.01.003	journal	March 2009
Functional assessment of the strength of solid acid catalysts Macht, Josef; Carr, Robert T.; Iglesia, Enrique Journal of Catalysis, Vol. 264, Issue 1 https://doi.org/10.1016/j.jcat.2009.03.005	journal	May 2009
Effects of CeO2 support facets on VOx/CeO2 catalysts in oxidative dehydrogenation of methanol Li, Yan; Wei, Zhehao; Gao, Feng Journal of Catalysis, Vol. 315 https://doi.org/10.1016/j.jcat.2014.04.013	journal	June 2014
Effect of vanadia and tungsten loadings on the physical and chemical characteristics of V2O5-WO3/TiO2 catalysts Djerad, S.; Tifouti, L.; Crocoll, M. Journal of Molecular Catalysis A: Chemical, Vol. 208, Issue 1-2 https://doi.org/10.1016/j.molcata.2003.07.016	journal	February 2004
Quantitative relationship between the nature of surface species and the catalytic activity of tungsten oxides supported on crystallized titania Onfroy, Thomas; Lebarbier, Vanessa; Clet, Guillaume Journal of Molecular Catalysis A: Chemical, Vol. 318, Issue 1-2 https://doi.org/10.1016/j.molcata.2009.11.013	journal	March 2010
STAFF-INDUSTRY COLLABORATIVE REPORT Vapor-Phase Production of Colloidal Silica White, Laurence; Duffy, George Industrial & Engineering Chemistry, Vol. 51, Issue 3 https://doi.org/10.1021/ie51394a019	journal	March 1959
X-ray absorption spectroscopy study of the titania- and alumina-supported tungsten oxide system Hilbrig, Frank; Goebel, Herbert E.; Knoezinger, Helmut The Journal of Physical Chemistry, Vol. 95, Issue 18 https://doi.org/10.1021/j100171a046	journal	September 1991
Structural determination of supported vanadium pentoxide-tungsten trioxide-titania catalysts by in situ Raman spectroscopy and x-ray photoelectron spectroscopy Vuurman, Michael A.; Wachs, Israel E.; Hirt, Andrew M. The Journal of Physical Chemistry, Vol. 95, Issue 24 https://doi.org/10.1021/j100177a059	journal	November 1991
Structure of surface tungsten oxide species in the tungsten trioxide/alumina supported oxide system from x-ray absorption near-edge spectroscopy and Raman spectroscopy Horsley, J. A.; Wachs, I. E.; Brown, J. M. The Journal of Physical Chemistry, Vol. 91, Issue 15 https://doi.org/10.1021/j100299a018	journal	July 1987
Infrared studies of intermediates of the ammonia synthesis on iron Nakata, Toshiko; Matsushita, Sanjuro The Journal of Physical Chemistry, Vol. 72, Issue 2 https://doi.org/10.1021/j100848a011	journal	February 1968
Tuning the Electronic and Molecular Structures of Catalytic Active Sites with Titania Nanoligands Ross-Medgaarden, Elizabeth I.; Wachs, Israel E.; Knowles, William V. Journal of the American Chemical Society, Vol. 131, Issue 2 https://doi.org/10.1021/ja711456c	journal	January 2009
Surface and Bulk Aspects of Mixed Oxide Catalytic Nanoparticles: Oxidation and Dehydration of CH ₃ OH by Polyoxometallates Nakka, Lingaiah; Molinari, Julie E.; Wachs, Israel E. Journal of the American Chemical Society, Vol. 131, Issue 42 https://doi.org/10.1021/ja904957d	journal	October 2009
Relations between Structure, Acidity, and Activity of WO _x /TiO ₂ : Influence of the Initial State of the Support, Titanium Oxyhydroxide, or Titanium Oxide Lebarbier, Vanessa; Clet, Guillaume; Houalla, Marwan The Journal of Physical Chemistry B, Vol. 110, Issue 45 https://doi.org/10.1021/jp064202e	journal	November 2006
In Situ Spectroscopic Investigation of the Molecular and Electronic Structures of SiO ₂ Supported Surface Metal Oxides Lee, Edward L.; Wachs, Israel E. The Journal of Physical Chemistry C, Vol. 111, Issue 39 https://doi.org/10.1021/jp0735482	journal	October 2007
Structural Determination of Bulk and Surface Tungsten Oxides with UV−vis Diffuse Reflectance Spectroscopy and Raman Spectroscopy Ross-Medgaarden, Elizabeth I.; Wachs, Israel E. The Journal of Physical Chemistry C, Vol. 111, Issue 41 https://doi.org/10.1021/jp074219c	journal	September 2007
In Situ Raman Spectroscopy of SiO ₂ -Supported Transition Metal Oxide Catalysts: An Isotopic ¹⁸ O− ¹⁶ O Exchange Study Lee, Edward L.; Wachs, Israel E. The Journal of Physical Chemistry C, Vol. 112, Issue 16 https://doi.org/10.1021/jp076485w	journal	April 2008
Alcohol Dehydration on Monooxo W═O and Dioxo O═W═O Species Li, Zhenjun; Šmíd, Břetislav; Kim, Yu Kwon The Journal of Physical Chemistry Letters, Vol. 3, Issue 16 https://doi.org/10.1021/jz300885v	journal	July 2012
Characterization of tungsta-titania catalysts Ramis, G.; Busca, G.; Cristiani, C. Langmuir, Vol. 8, Issue 7 https://doi.org/10.1021/la00043a010	journal	July 1992
Structure of WO _x /TiO ₂ Catalysts Prepared from Hydrous Titanium Oxide Hydroxide: Influence of Preparation Parameters Eibl, S.; Gates, B. C.; Knözinger, H. Langmuir, Vol. 17, Issue 1 https://doi.org/10.1021/la000977h	journal	January 2001
A Vibrational and Spectroscopic Study of WO ₃ /TiO ₂ −Al ₂ O ₃ Catalyst Precursors Gutiérrez-Alejandre, Aída; Ramírez, Jorge; Busca, Guido Langmuir, Vol. 14, Issue 3 https://doi.org/10.1021/la970993n	journal	February 1998
Reaction-Induced Spreading of Metal Oxides onto Surfaces of Oxide Supports during Alcohol Oxidation: Phenomenon, Nature, and Mechanisms Wang, Chuan-Bao; Cai, Yeping; Wachs, Israel E. Langmuir, Vol. 15, Issue 4 https://doi.org/10.1021/la9807210	journal	February 1999
Physico-chemical properties of WO₃/TiO₂ systems employed for 4-nitrophenol photodegradation in aqueous medium Martín, C.; Solana, G.; Rives, V. Catalysis Letters, Vol. 49, Issue 3/4, p. 235-243 https://doi.org/10.1023/A:1019025926206	journal	December 1997
A study on the monolayer dispersion of tungsten oxide on anatase Yu, Xiao-Feng; Wu, Nian-Zu; Huang, Hui-Zhong Journal of Materials Chemistry, Vol. 11, Issue 12 https://doi.org/10.1039/b100971k	journal	November 2001
Oxide phonon spectra Beattie, I. R.; Gilson, T. R. Journal of the Chemical Society A: Inorganic, Physical, Theoretical https://doi.org/10.1039/j19690002322	journal	January 1969
Preparation,Characterization and Photo-catalytic Behavior of WO₃/TiO₂ Nanopowder Fang-Bai, Li; Guo-Bang, Gu; Xin-Jun, Li Acta Physico-Chimica Sinica, Vol. 16, Issue 11 https://doi.org/10.3866/PKU.WHXB20001108	journal	January 2000

Cited By (7)

Modification Effects of B2O3 on The Structure and Catalytic Activity of WO3-UiO-66 Catalyst Yang, Xinli; Wu, Nan; Miao, Yongxia Nanomaterials, Vol. 8, Issue 10 https://doi.org/10.3390/nano8100781	journal	September 2018
Mechanism by which Tungsten Oxide Promotes the Activity of Supported V ₂ O ₅ /TiO ₂ Catalysts for NO _X Abatement: Structural Effects Revealed by ⁵¹ V MAS NMR Spectroscopy Jaegers, Nicholas R.; Lai, Jun‐Kun; He, Yang Angewandte Chemie, Vol. 131, Issue 36 https://doi.org/10.1002/ange.201904503	journal	July 2019
Mechanism by which Tungsten Oxide Promotes the Activity of Supported V ₂ O ₅ /TiO ₂ Catalysts for NO _X Abatement: Structural Effects Revealed by ⁵¹ V MAS NMR Spectroscopy Jaegers, Nicholas R.; Lai, Jun‐Kun; He, Yang Angewandte Chemie International Edition, Vol. 58, Issue 36 https://doi.org/10.1002/anie.201904503	journal	September 2019
Investigations on the Antimony Promotional Effect on CeO ₂ -WO ₃ /TiO ₂ for Selective Catalytic Reduction of NO _x with NH ₃ Yan, Lijun; Liu, Yangyang; Hu, Hang ChemCatChem, Vol. 8, Issue 13 https://doi.org/10.1002/cctc.201600332	journal	June 2016
Novel hollow microspheres MnxCo3−xO4 (x = 1, 2) with remarkable performance for low-temperature selective catalytic reduction of NO with NH3 Li, Yi; Li, Yanping; Shi, Qiang Journal of Sol-Gel Science and Technology, Vol. 81, Issue 2 https://doi.org/10.1007/s10971-016-4208-8	journal	October 2016
Al-free Fe-beta as a robust catalyst for selective reduction of nitric oxide by ammonia Song, Song; Wu, Guangjun; Dai, Weili Catalysis Science & Technology, Vol. 6, Issue 23 https://doi.org/10.1039/c6cy02124g	journal	January 2016
Regenerable g-C ₃ N ₄ –chitosan beads with enhanced photocatalytic activity and stability Zhao, Chaocheng; Yan, Qingyun; Wang, Shuaijun RSC Advances, Vol. 8, Issue 48 https://doi.org/10.1039/c8ra04293d	journal	January 2018

Similar Records

Influence of catalyst synthesis method on selective catalytic reduction (SCR) of NO by NH₃ with V₂O₅-WO₃/TiO₂ catalysts

Journal Article · Thu Apr 14 00:00:00 EDT 2016 · Applied Catalysis. B, Environmental · OSTI ID:1295102

Nature of Active Sites and Surface Intermediates during SCR of NO with NH₃ by Supported V₂O₅–WO₃/TiO₂ Catalysts

Journal Article · Mon Oct 23 00:00:00 EDT 2017 · Journal of the American Chemical Society · OSTI ID:1468067

Effect of redox promoters (CeO_x and CuO_x) and surface sulfates on the selective catalytic reduction (SCR) of NO with NH₃ by supported V₂O₅-WO₃/TiO₂ catalysts

Journal Article · Mon Jan 17 23:00:00 EST 2022 · Applied Catalysis. B, Environmental · OSTI ID:1976837

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Catalysts
Co-precipitated
IR
NH3
NO
Raman
Reaction
Selective catalytic reduction (SCR)
Spectroscopy
Temperature programmed surface reaction (TPSR)
TiO2
WO3