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Ambient Temperature CO Oxidation Using Palladium–Platinum Bimetallic Catalysts Supported on Tin Oxide/Alumina. Catalysts 2020. [DOI: 10.3390/catal10111223] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
A series of Pt-based catalysts were synthesised and investigated for ambient temperature CO oxidation with the aim to increase catalytic activity and improve moisture resistance through support modification. Initially, bimetallic PtPd catalysts supported on alumina were found to exhibit superior catalytic activity compared with their monometallic counterparts for the reaction. Following an investigation into the effect of Pt/Pd ratio, a composition of 0.1% Pt/0.4% Pd was selected for further studies. Following this, SnO2/Al2O3 supports were synthesised from a variety of tin oxide sources. Catalytic activity was improved using sodium stannate and tin oxalate precursors compared with a traditional tin oxide slurry. Catalytic activity versus tin concentration was found to vary significantly across the three precursors, which was subsequently investigated by X-ray photoelectron spectroscopy (XPS) and energy-dispersive X-ray spectroscopy (EDX).
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Yang J, Shi L, Liu X, Wen Y, Cho K, Zhao Y, Chen R, Shan B. Unravelling origins of Pd ensembles’ activity in CO oxidation via state-to-state microkinetic analysis. J Catal 2019. [DOI: 10.1016/j.jcat.2019.01.040] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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3
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Nyombi A, Williams M, Wessling R. Mechanical impregnation of Pd-Sn/alumina and Cu-Mn/graphite on charcoal to minimise carbon monoxide emissions. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2018.11.041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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4
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Hazlett MJ, Epling WS. Heterogeneous catalyst design: Zoned and layered catalysts in diesel vehicle aftertreatment monolith reactors. CAN J CHEM ENG 2018. [DOI: 10.1002/cjce.23293] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Melanie J. Hazlett
- Department of Chemical and Petroleum EngineeringUniversity of CalgaryCalgaryABCanada
| | - William S. Epling
- Department of Chemical EngineeringUniversity of VirginiaCharlottesvilleVA, USA
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Kang SB, Kalamaras C, Balakotaiah V, Epling W. Zoning and Trapping Effects on CO and Hydrocarbon Light-Off in Diesel Oxidation Catalysts. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b03604] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sung Bong Kang
- Deptartment
of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
| | | | - Vemuri Balakotaiah
- Deptartment
of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
| | - William Epling
- Deptartment
of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22904-4741, United States
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6
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Granger P. Challenges and breakthroughs in post-combustion catalysis: how to match future stringent regulations. Catal Sci Technol 2017. [DOI: 10.1039/c7cy00983f] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This short overview briefly summarizes the prominent evolutions and scientific breakthroughs in the development of end-of-pipe technologies with respect to the standard regulations of atmospheric pollutant emissions from automotive exhaust.
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Affiliation(s)
- P. Granger
- Unité de Catalyse et de Chimie du Solide
- Université de Lille Sciences et Technologies
- France
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8
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Zhang X, Durndell LJ, Isaacs MA, Parlett CMA, Lee AF, Wilson K. Platinum-Catalyzed Aqueous-Phase Hydrogenation of d-Glucose to d-Sorbitol. ACS Catal 2016. [DOI: 10.1021/acscatal.6b02369] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Xingguang Zhang
- European Bioenergy Research
Institute, Aston University, Birmingham B4 7ET, United Kingdom
| | - Lee J. Durndell
- European Bioenergy Research
Institute, Aston University, Birmingham B4 7ET, United Kingdom
| | - Mark A. Isaacs
- European Bioenergy Research
Institute, Aston University, Birmingham B4 7ET, United Kingdom
| | | | - Adam F. Lee
- European Bioenergy Research
Institute, Aston University, Birmingham B4 7ET, United Kingdom
| | - Karen Wilson
- European Bioenergy Research
Institute, Aston University, Birmingham B4 7ET, United Kingdom
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9
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Jin X, Zhao M, Vora M, Shen J, Zeng C, Yan W, Thapa PS, Subramaniam B, Chaudhari RV. Synergistic Effects of Bimetallic PtPd/TiO2 Nanocatalysts in Oxidation of Glucose to Glucaric Acid: Structure Dependent Activity and Selectivity. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.5b04841] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xin Jin
- Center for Environmentally Beneficial
Catalysis, ‡Department of Chemical and Petroleum
Engineering, §Department of Chemistry, and ∥Microscopy and Analytical Imaging Laboratory, University of Kansas, Lawrence, Kansas 66045, United States
| | - Meng Zhao
- Center for Environmentally Beneficial
Catalysis, ‡Department of Chemical and Petroleum
Engineering, §Department of Chemistry, and ∥Microscopy and Analytical Imaging Laboratory, University of Kansas, Lawrence, Kansas 66045, United States
| | - Muzzammil Vora
- Center for Environmentally Beneficial
Catalysis, ‡Department of Chemical and Petroleum
Engineering, §Department of Chemistry, and ∥Microscopy and Analytical Imaging Laboratory, University of Kansas, Lawrence, Kansas 66045, United States
| | - Jian Shen
- Center for Environmentally Beneficial
Catalysis, ‡Department of Chemical and Petroleum
Engineering, §Department of Chemistry, and ∥Microscopy and Analytical Imaging Laboratory, University of Kansas, Lawrence, Kansas 66045, United States
| | - Chun Zeng
- Center for Environmentally Beneficial
Catalysis, ‡Department of Chemical and Petroleum
Engineering, §Department of Chemistry, and ∥Microscopy and Analytical Imaging Laboratory, University of Kansas, Lawrence, Kansas 66045, United States
| | - Wenjuan Yan
- Center for Environmentally Beneficial
Catalysis, ‡Department of Chemical and Petroleum
Engineering, §Department of Chemistry, and ∥Microscopy and Analytical Imaging Laboratory, University of Kansas, Lawrence, Kansas 66045, United States
| | - Prem S. Thapa
- Center for Environmentally Beneficial
Catalysis, ‡Department of Chemical and Petroleum
Engineering, §Department of Chemistry, and ∥Microscopy and Analytical Imaging Laboratory, University of Kansas, Lawrence, Kansas 66045, United States
| | - Bala Subramaniam
- Center for Environmentally Beneficial
Catalysis, ‡Department of Chemical and Petroleum
Engineering, §Department of Chemistry, and ∥Microscopy and Analytical Imaging Laboratory, University of Kansas, Lawrence, Kansas 66045, United States
| | - Raghunath V. Chaudhari
- Center for Environmentally Beneficial
Catalysis, ‡Department of Chemical and Petroleum
Engineering, §Department of Chemistry, and ∥Microscopy and Analytical Imaging Laboratory, University of Kansas, Lawrence, Kansas 66045, United States
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10
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Pazzona FG, Demontis P, Suffritti GB. Thermodynamics of the one-dimensional parallel Kawasaki model: exact solution and mean-field approximations. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2014; 90:022118. [PMID: 25215700 DOI: 10.1103/physreve.90.022118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Indexed: 06/03/2023]
Abstract
The adsorption isotherm for the recently proposed parallel Kawasaki (PK) lattice-gas model [Phys. Rev. E 88, 062144 (2013)] is calculated exactly in one dimension. To do so, a third-order difference equation for the grand-canonical partition function is derived and solved analytically. In the present version of the PK model, the attraction and repulsion effects between two neighboring particles and between a particle and a neighboring empty site are ruled, respectively, by the dimensionless parameters ϕ and θ. We discuss the inflections induced in the isotherms by situations of high repulsion, the role played by finite lattice sizes in the emergence of substeps, and the adequacy of the two most widely used mean-field approximations in lattice gases, namely, the Bragg-Williams and the Bethe-Peierls approximations.
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Affiliation(s)
- Federico G Pazzona
- Dipartimento di Chimica e Farmacia, Università degli Studi di Sassari, 07100 Sassari, Italy
| | - Pierfranco Demontis
- Dipartimento di Chimica e Farmacia, Università degli Studi di Sassari, 07100 Sassari, Italy
| | - Giuseppe B Suffritti
- Dipartimento di Chimica e Farmacia, Università degli Studi di Sassari, 07100 Sassari, Italy
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11
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Lopes-Moriyama AL, Madigou V, Souza CPD, Leroux C. Controlled synthesis of CoFe2O4 nano-octahedra. POWDER TECHNOL 2014. [DOI: 10.1016/j.powtec.2014.01.080] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Shi C, Hansen HA, Lausche AC, Nørskov JK. Trends in electrochemical CO2 reduction activity for open and close-packed metal surfaces. Phys Chem Chem Phys 2014; 16:4720-7. [DOI: 10.1039/c3cp54822h] [Citation(s) in RCA: 299] [Impact Index Per Article: 29.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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13
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Hartmann H, Diemant T, Behm RJ. Kinetically limited CO adsorption: spill-over as a highly effective adsorption pathway on bimetallic surfaces. Chemphyschem 2013; 14:3801-5. [PMID: 24039117 DOI: 10.1002/cphc.201300722] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Indexed: 11/09/2022]
Abstract
We demonstrate that the (local) adsorbed carbon monoxide, COad , coverage on the Pt-free areas of bimetallic Pt/Ru(0001) surfaces (a Ru(0001) substrate partly covered by Pt monolayer islands) can be increased to ∼0.80 monolayers (ML), well above the established saturation COad coverage of 0.68 ML, even under ultrahigh vacuum conditions by using spill-over of CO adsorbed on the Pt islands to the Ru areas as an highly effective adsorption channel. The apparent COad saturation coverage of 0.68 ML on pure Ru(0001) is identified as due to kinetic limitations, hindering further uptake from the gas phase, rather than being caused by thermodynamic reasons. This spill-over mechanism is proposed to be a general phenomenon for adsorption on bimetallic surfaces.
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Affiliation(s)
- Heinrich Hartmann
- Institute of Surface Chemistry and Catalysis, Albert-Einstein-Allee 47, Ulm University, 89069 Ulm (Germany)
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15
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Durndell LJ, Parlett CMA, Hondow NS, Wilson K, Lee AF. Tunable Pt nanocatalysts for the aerobic selox of cinnamyl alcohol. NANOSCALE 2013; 5:5412-5419. [PMID: 23657207 DOI: 10.1039/c3nr00184a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The selective aerobic oxidation of cinnamyl alcohol over Pt nanoparticles has been tuned via the use of mesoporous silica supports to control their dispersion and oxidation state. High area two-dimensional SBA-15, and three-dimensional, interconnected KIT-6 silica significantly enhance Pt dispersion, and thus surface PtO2 concentration, over that achievable via commercial low surface area silica. Selective oxidation activity scales with Pt dispersion in the order KIT-6 ≥ SBA-15 > SiO2, evidencing surface PtO2 as the active site for cinnamyl alcohol selox to cinnamaldehyde. Kinetic mapping has quantified key reaction pathways, and the importance of high O2 partial pressures for cinnamaldehyde production.
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Affiliation(s)
- Lee J Durndell
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff CF10 3AT, UK
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