1
|
Reaction pathways of oxidative coupling of methane on lithiated lanthanum oxide. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.112974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
|
2
|
Di M, Simmance K, Schaefer A, Feng Y, Hemmingsson F, Skoglundh M, Bell T, Thompsett D, Ajakaiye Jensen LI, Blomberg S, Carlsson PA. Chasing PtO species in ceria supported platinum during CO oxidation extinction with correlative operando spectroscopic techniques. J Catal 2022. [DOI: 10.1016/j.jcat.2022.03.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
3
|
Umesh NM, Wang SF, Kameoka S. Promotional effects of Pt–CeO2 fabricated by hydrothermal leaching of Al78Ce22-xPtx (x = 0, 0.1) intermetallic compound for efficient catalytic CO oxidation. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.122984] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
4
|
Chen PW, Maiti D, Liu RF, Grabow LC, Harold MP. CH 4 steam reforming on Pt + Pd/Al 2O 3 monolith: impact of Mn 0.5Fe 2.5O 4 spinel addition. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00270a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Zoned catalyst provides CH4 oxidation enhancement afforded by spinel under oxidation regime and mitigates the detrimental base metal species migration from spinel layer to PGM layer under reforming regime.
Collapse
Affiliation(s)
- Pak Wing Chen
- William A. Brookshire Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, USA
| | - Debtanu Maiti
- William A. Brookshire Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, USA
| | - Ru-Fen Liu
- CDTi Advanced Materials, Inc., 1641 Fiske Place, Oxnard, California 93033, USA
| | - Lars C. Grabow
- William A. Brookshire Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, USA
| | - Michael P. Harold
- William A. Brookshire Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, USA
| |
Collapse
|
5
|
Bhumla P, Kumar M, Bhattacharya S. Theoretical insights into C-H bond activation of methane by transition metal clusters: the role of anharmonic effects. NANOSCALE ADVANCES 2021; 3:575-583. [PMID: 36131731 PMCID: PMC9417659 DOI: 10.1039/d0na00669f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 11/16/2020] [Indexed: 06/15/2023]
Abstract
In heterogeneous catalysis, the determination of active phases has been a long-standing challenge, as materials' properties change under operational conditions (i.e. temperature (T) and pressure (p) in an atmosphere of reactive molecules). As a first step towards materials design for methane activation, we study the T and p dependence of the composition, structure, and stability of metal oxide clusters in a reactive atmosphere at thermodynamic equilibrium using a prototypical model catalyst having wide practical applications: free transition metal (Ni) clusters in a combined oxygen and methane atmosphere. A robust methodological approach is employed, where the starting point is systematic scanning of the potential energy surface (PES) to obtain the global minimum structures using a massively parallel cascade genetic algorithm (cGA) at the hybrid density functional level. The low energy clusters are further analyzed to estimate their thermodynamic stability at realistic T, p O2 and p CH4 using ab initio atomistic thermodynamics (aiAT). To incorporate the anharmonicity in the vibrational free energy contribution to the configurational entropy, we evaluate the excess free energy of the clusters numerically by a thermodynamic integration method with ab initio molecular dynamics (aiMD) simulation inputs. By analyzing a large dataset, we show that the conventional harmonic approximation miserably fails for this class of materials, and capturing the anharmonic effects on the vibration free energy contribution is indispensable. The latter has a significant impact on detecting the activation of the C-H bond, while the harmonic infrared spectrum fails to capture this, due to the wrong prediction of the vibrational modes.
Collapse
Affiliation(s)
- Preeti Bhumla
- Department of Physics, Indian Institute of Technology Delhi New Delhi India +91 11 2658 2037 +91 11 2659 1359
| | - Manish Kumar
- Department of Physics, Indian Institute of Technology Delhi New Delhi India +91 11 2658 2037 +91 11 2659 1359
| | - Saswata Bhattacharya
- Department of Physics, Indian Institute of Technology Delhi New Delhi India +91 11 2658 2037 +91 11 2659 1359
| |
Collapse
|
6
|
Velin P, Florén CR, Skoglundh M, Raj A, Thompsett D, Smedler G, Carlsson PA. Palladium dispersion effects on wet methane oxidation kinetics. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00734j] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The catalytic activity for dry and wet methane oxidation over a series of palladium–alumina catalysts with systematically varied palladium loadings and PdO dispersions was measured and compared with conceptual multiscale simulations.
Collapse
Affiliation(s)
- Peter Velin
- Department of Chemistry and Chemical Engineering
- Competence Centre for Catalysis
- Chalmers University of Technology
- SE-41296 Göteborg
- Sweden
| | - Carl-Robert Florén
- Department of Chemistry and Chemical Engineering
- Competence Centre for Catalysis
- Chalmers University of Technology
- SE-41296 Göteborg
- Sweden
| | - Magnus Skoglundh
- Department of Chemistry and Chemical Engineering
- Competence Centre for Catalysis
- Chalmers University of Technology
- SE-41296 Göteborg
- Sweden
| | - Agnes Raj
- Johnson Matthey Technology Centre
- Reading
- UK
| | | | | | - Per-Anders Carlsson
- Department of Chemistry and Chemical Engineering
- Competence Centre for Catalysis
- Chalmers University of Technology
- SE-41296 Göteborg
- Sweden
| |
Collapse
|
7
|
CO and C3H6 oxidation over platinum-group metal (PGM) catalysts supported on Mn-modified hexagonal YbFeO3. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.07.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
8
|
Recent In Situ/Operando Spectroscopy Studies of Heterogeneous Catalysis with Reducible Metal Oxides as Supports. Catalysts 2019. [DOI: 10.3390/catal9050477] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
For heterogeneous catalysis, the metal catalysts supported on reducible metal oxides, especially CeO2 and TiO2, have long been a research focus because of their excellent catalytic performance in a variety of catalytic reactions. Detailed understanding of the promotion effect of reducible metal oxides on catalytic reactions is beneficial to the rational design of new catalysts. The important catalytic roles of reducible metal oxides are attributed to their intimate interactions with the supported metals (e.g., strong metal-support interaction, electronic metal-support interaction) and unique support structures (e.g., oxygen vacancy, reversible valence change, surface hydroxyl). However, the structures of the catalysts and reaction mechanisms are strongly affected by environmental conditions. For this reason, in situ/operando spectroscopy studies under working conditions are necessary to obtain accurate information about the structure-activity relationship. In this review, the recent applications of the in situ/operando spectroscopy methodology on metal catalysts with reducible metal oxides as supports are summarized.
Collapse
|
9
|
Pd4S/SiO2: A Sulfur-Tolerant Palladium Catalyst for Catalytic Complete Oxidation of Methane. Catalysts 2019. [DOI: 10.3390/catal9050410] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Sulfur species (e.g. H2S or SO2) are the natural enemies of most metal catalysts, especiallypalladium catalysts. The previously reported methods of improving sulfur-tolerance were toeffectively defer the deactivation of palladium catalysts, but could not prevent PdO and carrierinteraction between sulfur species. In this report, novel sulfur-tolerant SiO2 supported Pd4Scatalysts (5 wt. % Pd loading) were prepared by H2S–H2 aqueous bubble method and applied tocatalytic complete oxidation of methane. The catalysts were characterization by X-ray diffraction,Transmission electron microscopy, X-ray photoelectron Spectroscopy, temperature-programmedoxidation, and temperature-programmed desorption techniques under identical conditions. Thestructural characterization revealed that Pd4S and metallic Pd0 were found on the surface of freshlyprepared catalysts. However, Pd4S remained stable while most of metallic Pd0 was converted toPdO during the oxidation reaction. When coexisting with PdO, Pd4S not only protected PdO fromsulfur poisoning, but also determined the catalytic activity. Moreover, the content of Pd4S could beadjusted by changing H2S concentration of H2S–H2 mixture. When H2S concentration was 7 %, thePd4S/SiO2 catalyst was effective in converting 96% of methane at the 400 °C and also exhibitedlong-term stability in the presence of 200 ppm H2S. A Pd4S/SiO2 catalyst that possesses excellentsulfur-tolerance, oxidation stability, and catalytic activity has been developed for catalyticcomplete oxidation of methane.
Collapse
|
10
|
Ahmad YH, Mohamed AT, Mahmoud KA, Aljaber AS, Al-Qaradawi SY. Natural clay-supported palladium catalysts for methane oxidation reaction: effect of alloying. RSC Adv 2019; 9:32928-32935. [PMID: 35529723 PMCID: PMC9073133 DOI: 10.1039/c9ra06804j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 10/03/2019] [Indexed: 11/21/2022] Open
Abstract
Bimetallic Pd-supported halloysite nanotubes revealed outstanding catalytic activity towards catalytic methane oxidation especially PdNi.
Collapse
Affiliation(s)
- Yahia H. Ahmad
- Department of Chemistry and Earth Sciences
- College of Arts and Sciences
- Qatar University
- Doha 2713
- Qatar
| | - Assem T. Mohamed
- Department of Chemistry and Earth Sciences
- College of Arts and Sciences
- Qatar University
- Doha 2713
- Qatar
| | - Khaled A. Mahmoud
- Qatar Environment and Energy Research Institute (QEERI)
- Hamad Bin Khalifa University (HBKU)
- Doha 5825
- Qatar
| | - Amina S. Aljaber
- Department of Chemistry and Earth Sciences
- College of Arts and Sciences
- Qatar University
- Doha 2713
- Qatar
| | - Siham Y. Al-Qaradawi
- Department of Chemistry and Earth Sciences
- College of Arts and Sciences
- Qatar University
- Doha 2713
- Qatar
| |
Collapse
|
11
|
Abstract
We present electrochemical and chemical synthesis of platinum black at room temperature in aqueous and non-aqueous media. X-ray analysis established the purity and crystalline nature. The electron micrographs indicate that the nanostructures consist of platinum crystals that interconnect to form porous assemblies. Additionally, the electron micrographs of the platinum black thin layer, which was electrochemically deposited on different metallic and semiconductive substrates (aluminium, platinum, silver, gold, tin-cooper alloy, indium-tin-oxide, stainless steel, and copper), indicate that the substrate influences its porous features but not its absorbance characteristics. The platinum black exhibited a broad absorbance and low reflectance in the ultraviolet, visible, and infrared regions. These characteristics make this material suitable for use as a high-temperature resistant absorber layer for the fabrication of microelectronics.
Collapse
|
12
|
Tabib Zadeh Adibi P, Pingel T, Olsson E, Grönbeck H, Langhammer C. Plasmonic Nanospectroscopy of Platinum Catalyst Nanoparticle Sintering in a Mesoporous Alumina Support. ACS NANO 2016; 10:5063-5069. [PMID: 27158734 DOI: 10.1021/acsnano.5b07861] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In situ plasmonic nanospectroscopy has proven useful to bridge the pressure gap in heterogeneous catalysis. The method has, however, so far been used only for idealized two-dimensional systems without the structural complexity of realistic three-dimensional porous oxides, which generally are used as supports for the catalytically active metal nanoparticles. Here, we report a generic method that addresses this structural gap by demonstrating the possibility to use nanoplasmonic sensing to monitor surface processes in a traditional three-dimensional mesoporous alumina matrix, wet-impregnated with Pt nanoparticles. The capability of the experimental platform is illustrated by measuring sintering kinetics of the Pt nanoparticles inside the mesoporous matrix under oxidizing conditions at atmospheric pressure and at temperatures up to 625 °C. The study thus demonstrates in operando plasmonic nanospectroscopy of realistic, commercial catalyst systems.
Collapse
Affiliation(s)
- Pooya Tabib Zadeh Adibi
- Department of Physics and ‡Competence Centre for Catalysis, Chalmers University of Technology , 412 96 Göteborg, Sweden
| | - Torben Pingel
- Department of Physics and ‡Competence Centre for Catalysis, Chalmers University of Technology , 412 96 Göteborg, Sweden
| | - Eva Olsson
- Department of Physics and ‡Competence Centre for Catalysis, Chalmers University of Technology , 412 96 Göteborg, Sweden
| | - Henrik Grönbeck
- Department of Physics and ‡Competence Centre for Catalysis, Chalmers University of Technology , 412 96 Göteborg, Sweden
| | - Christoph Langhammer
- Department of Physics and ‡Competence Centre for Catalysis, Chalmers University of Technology , 412 96 Göteborg, Sweden
| |
Collapse
|
13
|
Liu W, Wang W, Tang K, Guo J, Ren Y, Wang S, Feng L, Yang Y. The promoting influence of nickel species in the controllable synthesis and catalytic properties of nickel–ceria catalysts. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01241d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The nickel species in the nickel–ceria samples were confirmed to have multi effects in the morphology and the structure formation.
Collapse
Affiliation(s)
- Wei Liu
- Key Laboratory for Special Functional Aggregate Materials of Education Ministry
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- PR China
| | - Wenzhi Wang
- Shandong Experimental High School
- Jinan
- PR China
| | - Ke Tang
- Key Laboratory for Special Functional Aggregate Materials of Education Ministry
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- PR China
| | - Jinxin Guo
- Key Laboratory for Special Functional Aggregate Materials of Education Ministry
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- PR China
| | - Yuqing Ren
- Key Laboratory for Special Functional Aggregate Materials of Education Ministry
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- PR China
| | - Shuping Wang
- Key Laboratory for Special Functional Aggregate Materials of Education Ministry
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- PR China
| | - Lijun Feng
- Key Laboratory for Special Functional Aggregate Materials of Education Ministry
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- PR China
| | - Yanzhao Yang
- Key Laboratory for Special Functional Aggregate Materials of Education Ministry
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- PR China
| |
Collapse
|
14
|
Arandiyan H, Dai H, Ji K, Sun H, Li J. Pt Nanoparticles Embedded in Colloidal Crystal Template Derived 3D Ordered Macroporous Ce0.6Zr0.3Y0.1O2: Highly Efficient Catalysts for Methane Combustion. ACS Catal 2015. [DOI: 10.1021/cs501773h] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hamidreza Arandiyan
- Particles and Catalysis
Research Group, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
- State Key Joint
Laboratory of Environment Simulation and Pollution Control, School
of Environment, Tsinghua University, Beijing 100084, People’s Republic of China
| | - Hongxing Dai
- Key Laboratory
of Beijing on Regional Air Pollution Control, Beijing Key Laboratory
for Green Catalysis and Separation, Key Laboratory of Advanced Functional
Materials, Education Ministry of China, and Laboratory of Catalysis
Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering,
College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, People’s Republic of China
| | - Kemeng Ji
- Key Laboratory
of Beijing on Regional Air Pollution Control, Beijing Key Laboratory
for Green Catalysis and Separation, Key Laboratory of Advanced Functional
Materials, Education Ministry of China, and Laboratory of Catalysis
Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering,
College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, People’s Republic of China
| | - Hongyu Sun
- National Center for Electron Microscopy
in Beijing, School of Materials Science and Engineering, The State
Key Laboratory of New Ceramics and Fine Processing, Key Laboratory
of Advanced Materials (MOE), Tsinghua University, Beijing 100084, People’s Republic of China
| | - Junhua Li
- State Key Joint
Laboratory of Environment Simulation and Pollution Control, School
of Environment, Tsinghua University, Beijing 100084, People’s Republic of China
| |
Collapse
|
15
|
Chien AC, van Bokhoven JA. Boron nitride coated rhodium black for stable production of syngas. Catal Sci Technol 2015. [DOI: 10.1039/c5cy00021a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A blanket of boron nitride grown by CVD stablizes rhodium black for syngas production in methane oxidation and avoid agglomeration of metal particle by carbon deposition.
Collapse
Affiliation(s)
| | - Jeroen A. van Bokhoven
- Paul Scherrer Institute
- 5232 Villigen PSI
- Switzerland
- ETH Zürich
- Institute for Chemical and Bioengineering
| |
Collapse
|