This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
A Study of PGM-Free Oxidation Catalyst YMnO 3 for Diesel Exhaust Aftertreatment
Technical Paper
2012-01-0365
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Manganese oxides show high catalytic activity for CO and HC oxidation without including platinum group metals (PGM). However, there are issues with both thermal stability and resistance to sulfur poisoning. We have studied perovskite-type YMnO₃ (YMO) with the aim of simultaneously achieving both activity and durability. This paper describes the oxidation activity of PGM-free Ag/i-YMO, which is silver supported on improved-YMO (i-YMO). The Ag/i-YMO was obtained by the following two methods. First, Mn⁴+ ratio and specific surface area of YMO were increased by optimizing composition and preparation method. Second, the optimum amount of silver was supported on i-YMO. In model gas tests and engine bench tests, the Ag/i-YMO catalyst showed the same level of activity as that of the conventional Pt/γ-Al₂O₃ (Pt = 3.0 g/L). In addition, there was no degradation with respect to either heat treatment (700°C, 90 h, air) or sulfur treatment (600°C to 200°C, total 60 h, 30 ppm SO₂). X-ray photoelectron spectroscopy (XPS), X-ray absorption fine-structure spectroscopy (XAFS) and transmission electron microscope (TEM) analysis showed that the silver in Ag/i-YMO was not substituted into the i-YMO, and existed as metallic silver with a particle size of 3 nm to 80 nm on the i-YMO surface. First-principles calculation was performed for the bulk model to investigate the catalytic activity of the silver at the interface between these silver particles and the i-YMO. The results showed that the d-band center of this silver is close to that of PGM. The oxidation activity of Ag/i-YMO was mainly enhanced by this highly active silver.
Recommended Content
Authors
- Keita Ishizaki - Honda R&D Co., Ltd.
- Naoki Mitsuda - Honda R&D Co., Ltd.
- Naoki Ohya - Honda R&D Co., Ltd.
- Hiroshi Ohno - Honda R&D Co., Ltd.
- Takahiro Naka - Honda R&D Co., Ltd.
- Akira Abe - MIitsui Mining & Smelting Co., Ltd.
- Hiromitsu Takagi - MIitsui Mining & Smelting Co., Ltd.
- Akiko Sugimoto - MIitsui Mining & Smelting Co., Ltd.
Topic
Citation
Ishizaki, K., Mitsuda, N., Ohya, N., Ohno, H. et al., "A Study of PGM-Free Oxidation Catalyst YMnO3 for Diesel Exhaust Aftertreatment," SAE Technical Paper 2012-01-0365, 2012, https://doi.org/10.4271/2012-01-0365.Also In
References
- Zaki, M. I. et al. “CO and CH 4 total oxidation over manganese oxide supported on ZrO 2 , TiO 2 , TiO 2 -Al 2 O 3 and SiO 2 -Al 2 O 3 catalysts” New Journal of Chemistry 23 1197 1202 1999
- Xiufeng, X. et al. “Catalytic Combustion of Methane over MnO x /ZrO 2 -Al 2 O 3 Catalysts” Journal of Natural Gas Chemistry 12 4 228 232 2003
- Tsyrul'nikov, P.G. “Thermal Activation Effect on Catalytic Systems MnO x /Al 2 O 3 for Deep Oxidation of Hydrocarbons” Russian Journal of General Chemistry 77 12 2328 2336 2007
- Ishizaki, K. et al. “CO oxidation activity of YMnO 3 in the presence of excess oxygen” 22th Internal Combustion Engine Symposium 481 486 2011
- Courty, P. et al. “Oxydes mixtes ou en solution solide sous forme très divisée obtenus par décomposition thermique de précurseurs amorphes” Powder Technology 7 1 21 38 1973
- Goldschmidt, V.M. “Geochemische Verteilungsgesetze der Elemente VII” Die Gesetze der Krystallochemie, Math-Naturv.K1 Oslo, Norway 1926
- Kumar, M. S. V. et al. “Formation of Orthorhombic and Multiferroic Hexagonal Phases from an Undercooled RMnO 3 (R=Rare- Earth Element) Melt Using a Containerless Technique” Journal of the American Ceramic Society 94 1 281 288 2011
- Chen, M. et al. “Thermodynamic assessment of the Mn-Y-O system” Journal of Alloys and Compounds 393 1-2 114 121 2005
- Alonso, J. A. et al. “Evolution of the Jahn-Teller Distortion of MnO 6 Octahedra in RMnO 3 Perovskites (R=Pr, Nd, Dy, Tb, Ho, Er, Y): A Neutron Diffraction Study” Inorganic Chemistry 39 5 917 923 2000
- Cunningham, D. A. H. et al. “Influence of dry operating conditions: observation of oscillations and low temperature CO oxidation over Co 3 O 4 and Au/Co 3 O 4 catalysts” Catalysis Letters 25 257 264 1994
- Haruta, M. et al. “Low-temperature Combustion Catalysts Mainly for CO Oxidation” Sekiyu Gakkaishi 37 5 480 491 1994
- Song, K. -S. et al. “Catalytic combustion of CH 4 and CO on La 1-x M x MnO 3 perovskites” Catalysis Today 47 155 160 1999
- Ifrah, S. et al. “Conventional hydrothermal process versus microwave-assisted hydrothermal synthesis of La 1-x Ag x MnO 3+δ (x=0,0.2) perovskites used in methane combustion” Comptes Rendus Chimie 10 12 1216 1226 2007
- Kucharczyk, B. et al. “Partial substitution of lanthanum with silver in the LaMnO 3 perovskite: Effect of the modification on the activity of monolithic catalysts in the reactions of methane and carbon oxide oxidation” Applied Catalysis A: General 335 1 28 36 2008
- Burghaus, U. et al. “HREELS study of CO oxidation on Ag(001) by O 2 or O” Surface Science 374 1-3 1 8 1997
- Gajdoš, M. et al. “CO adsorption on close-packed transition and noble metal surfaces: Trends from: ab-initio calculations” Journal of Physics: Condensed Matter 16 1141 1164 2004
- Shimizu, K. et al. “Development of self-regenerative oxidation catalyst using spontaneous dispersion of silver on alumina” Catalyst 53 2 107 109 2011
- Minato, T. et al. “Points for Debate on the Generation Mechanism of Catalytic Activity of Au/TiO 2 ” Journal of the Surface Science Society of Japan 27 6 319 325 2006
- Chun, W. J. et al. “Principles Pertaining to the Metal-support Interaction on Metal Oxide Surfaces” Journal of the Surface Science Society of Japan 30 2 84 91 2009
- Haruta, M. “Catalysis by Gold Nanoparticles” Journal of the Surface Science Society of Japan 26 10 578 584 2005
- Morikawa, Y. “Trends in the First-principles Theoretical Study on Catalysis” Journal of the Surface Science Society of Japan 27 6 354 359 2006
- Hammer, B. et al. “CO Chemisorption at Metal Surfaces and Overlays” Physics Review Letters 76 2141 1996
- Hammer, B. et al. “Theoretical surface science and catalysis-calculations and concepts” Advances in Catalysts 45 71 2000
- Hammer, B. et al. “Electronic factors determining the reactivity of metal surfaces” Surf. Sci. 343 211 1995
- Nørskov, J. K. et al. “Universality in Heterogeneous Catalysis” Journal of Catalysis 209 2 275 278 2002
- Falsig, H. et al. “Trends in the Catalytic CO Oxidation Activity of Nanoparticles” Angewandte Chemie 120 26 4913 4917 2008
- Greeley, J. et al. “ELECTRONIC STRUCTURE AND CATALYSIS ON METAL SURFACES” Annual Review of Physical Chemistry 53 319 348 2002
- Mun, B. S. et al. “A study of electronic structures of Pt 3 M (M=Ti,V,Cr,Fe,Co,Ni) polycrystalline alloys with valence-band” Journal of Chemical Physics 123 20 204717-204717 4 2005
- Kresse, G. et al. “Ab initio molecular-dynamics simulation of the liquid-metal-amorphous-semiconductor transition in germanium” Physical Review B 49 2 14251 14269 1994
- Kresse, G. et al. “Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set” Computational Materials Science 6 1 15 50 1996
- Kresse, G. et al. “From ultrasoft pseudopotentials to the projector augmented-wave method” Physical Review B 59 3 1758 1775 1999
- Satpathy, S. et al. “Electronic Structure of the Perovskite Oxides: La 1- x Ca x MnO 3 ” Physics Review Letters 76 960 1996
- Qian, M. et al. “Electronic structure of the ferroelectromagnet YMnO 3 ” Physics Letters A 270 96 101 2000
- Levasseur, B. et al. “Effect of the rare earth in the perovskite-type mixed oxides AMnO 3 (A=Y, La, Pr, Sm, Dy) as catalysts in methanol oxidation” Journal of Solid State Chemistry 181 11 2953 2963 2008
- Song, K.-S. et al. “Preparation and characterization of Ag/MnO x /Perovskite catalysts for CO oxidation” Catalysis Letters 49 65 68 1997
- Alifanti, M. et al. “Activity in methane combustion and sensitivity to sulfur poisoning of La 1-x Ce x Mn 1-y Co y O 3 perovskite oxides” Applied Catalysis B: Environmental 41 71 81 2003
- Asamoto, M. et al. “Influence of the carbonate species formed on perovskite-type oxide on the catalytic activity for CO oxidation” Catalyst 51 2 114 116 2009