1
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Zhang Y, Levin N, Kang L, Müller F, Zobel M, DeBeer S, Leitner W, Bordet A. Design and Understanding of Adaptive Hydrogenation Catalysts Triggered by the H 2/CO 2-Formic Acid Equilibrium. J Am Chem Soc 2024. [PMID: 39322628 DOI: 10.1021/jacs.4c06765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/27/2024]
Abstract
An adaptive catalytic system for selective hydrogenation was developed exploiting the H2 + CO2 ⇔ HCOOH equilibrium for reversible, rapid, and robust on/off switch of the ketone hydrogenation activity of ruthenium nanoparticles (Ru NPs). The catalyst design was based on mechanistic studies and DFT calculations demonstrating that adsorption of formic acid to Ru NPs on silica results in surface formate species that prevent C═O hydrogenation. Ru NPs were immobilized on readily accessible silica supports modified with guanidinium-based ionic liquid phases (Ru@SILPGB) to generate in situ sufficient amounts of HCOOH when CO2 was introduced into the H2 feed gas for switching off ketone hydrogenation while maintaining the activity for hydrogenation of olefinic and aromatic C═C bonds. Upon shutting down the CO2 supply, the C═O hydrogenation activity was restored in real time due to the rapid decarboxylation of the surface formate species without the need for any changes in the reaction conditions. Thus, the newly developed Ru@SILPGB catalysts allow controlled and alternating production of either saturated alcohols or ketones from unsaturated substrates depending on the use of H2 or H2/CO2 as feed gas. The major prerequisite for design of adaptive catalytic systems based on CO2 as trigger is the ability to shift the H2 + CO2 ⇔ HCOOH equilibrium sufficiently to exploit competing adsorption of surface formate and targeted functional groups. Thus, the concept can be expected to be more generally applicable beyond ruthenium as the active metal, paving the way for next-generation adaptive catalytic systems in hydrogenation reactions more broadly.
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Affiliation(s)
- Yuyan Zhang
- Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Natalia Levin
- Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Liqun Kang
- Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Felix Müller
- Institute of Crystallography, RWTH Aachen University, 52074 Aachen, Germany
| | - Mirijam Zobel
- Institute of Crystallography, RWTH Aachen University, 52074 Aachen, Germany
| | - Serena DeBeer
- Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Walter Leitner
- Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470 Mülheim an der Ruhr, Germany
- Institute for Technical and Macromolecular Chemistry, RWTH Aachen University, 52074 Aachen, Germany
| | - Alexis Bordet
- Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470 Mülheim an der Ruhr, Germany
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2
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Lan Y, Tang R, Ye R, Su M, Lei Q, Li F, Tian X, Song J, Zhou L. Unraveling CO adsorption behaviors and its poisoning effects on ZrCo surface. Phys Chem Chem Phys 2024; 26:9617-9627. [PMID: 38466129 DOI: 10.1039/d3cp06251a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
Theoretical calculations are performed to elucidate the adsorption behaviors and poisoning effects of CO gas on the ZrCo surface, which drastically limits its application in hydrogen isotopic storage. Specifically, the ionic Zr-Co bond on the surface leads to unique CO adsorption structures on different sites. The CO molecule tends to prefer a tilted adsorption configuration on the Co-Co bridge site. The electronic structures, charge distributions, and bonding characteristics are further explored to study the CO adsorption properties, which obey the electron density donation and back-donation mechanism. For different CO coverages, the stepwise adsorption energies of CO increase with the increasing of coverage, reaching the saturated coverage at nCO = 11. Then, the effects of temperature and partial pressure on CO coverage are evaluated using atomic thermodynamics. The computed phase diagram shows that the ZrCo(110) surface has a stable coverage of nCO = 6 at ambient temperature under ultrahigh vacuum conditions. The pre-adsorbed CO molecules lead to the charge redistribution and the d-band center downshift on the surface, which significantly affect hydrogen adsorption and dissociation. Our results provide insights into the poisoning mechanisms of the impurity gas on ZrCo alloys, which can be beneficial for designing high-performance ZrCo-based alloys with improved poisoning tolerance.
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Affiliation(s)
- Yuejing Lan
- College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu, 610059, China.
- Institute of Materials, China Academy of Engineering Physics, Mianyang, 621907, China.
| | - Ru Tang
- Institute of Materials, China Academy of Engineering Physics, Mianyang, 621907, China.
| | - Rongxing Ye
- Institute of Materials, China Academy of Engineering Physics, Mianyang, 621907, China.
| | - Minan Su
- Institute of Materials, China Academy of Engineering Physics, Mianyang, 621907, China.
| | - Qianghua Lei
- Institute of Materials, China Academy of Engineering Physics, Mianyang, 621907, China.
| | - Fei Li
- College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu, 610059, China.
| | - Xiaofeng Tian
- College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu, 610059, China.
| | - Jiangfeng Song
- Institute of Materials, China Academy of Engineering Physics, Mianyang, 621907, China.
| | - Linsen Zhou
- Institute of Materials, China Academy of Engineering Physics, Mianyang, 621907, China.
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3
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High-efficiency destruction of aromatic VOC mixtures in a MoS2 cocatalytic Fe3+/PMS reaction. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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4
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Dissociative adsorption of H2 on metal cluster and (1 1 1) surface of Ag, Co, Cu and Ru. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2022.111546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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5
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Zhao P, Ehara M, Satsuma A, Sakaki S. Theoretical insight into oxidation catalysis of chromite spinel MCr2O4 (M = Mg, Co, Cu, and Zn): Volcano plot for oxygen-vacancy formation and catalytic activity. J Catal 2021. [DOI: 10.1016/j.jcat.2020.11.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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Wang WY, Wang GC. The first-principles-based microkinetic simulation of the dry reforming of methane over Ru(0001). Catal Sci Technol 2021. [DOI: 10.1039/d0cy01942a] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
As the temperature was increased, the generation rate of H2 and CO in the DRM reaction on Ru(0001) gradually increased along with the ratio of H2/CO generation rate.
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Affiliation(s)
- Wan-Ying Wang
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) and
- The Tianjin Key Lab and Molecule-based Material Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
| | - Gui-Chang Wang
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) and
- The Tianjin Key Lab and Molecule-based Material Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
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7
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Xu S, Chansai S, Xu S, Stere CE, Jiao Y, Yang S, Hardacre C, Fan X. CO Poisoning of Ru Catalysts in CO 2 Hydrogenation under Thermal and Plasma Conditions: A Combined Kinetic and Diffuse Reflectance Infrared Fourier Transform Spectroscopy–Mass Spectrometry Study. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03620] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Shanshan Xu
- Department of Chemical Engineering and Analytical Science, School of Engineering, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Sarayute Chansai
- Department of Chemical Engineering and Analytical Science, School of Engineering, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Shaojun Xu
- UK Catalysis Hub, Research Complex at Harwell, Didcot OX11 0FA, United Kingdom
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff CF10 3AT, United Kingdom
| | - Cristina E. Stere
- Department of Chemical Engineering and Analytical Science, School of Engineering, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Yilai Jiao
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
| | - Sihai Yang
- Department of Chemistry, School of Natural Science, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Christopher Hardacre
- Department of Chemical Engineering and Analytical Science, School of Engineering, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Xiaolei Fan
- Department of Chemical Engineering and Analytical Science, School of Engineering, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
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8
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Wang M, Zhou C, Akter N, Tysoe WT, Boscoboinik JA, Lu D. Mechanism of the Accelerated Water Formation Reaction under Interfacial Confinement. ACS Catal 2020. [DOI: 10.1021/acscatal.9b05289] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Mengen Wang
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
- Materials Science and Chemical Engineering Department, Stony Brook University, Stony Brook, New York 11790, United States
| | - Chen Zhou
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
- Materials Science and Chemical Engineering Department, Stony Brook University, Stony Brook, New York 11790, United States
| | - Nusnin Akter
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
- Materials Science and Chemical Engineering Department, Stony Brook University, Stony Brook, New York 11790, United States
| | - Wilfred T. Tysoe
- Department of Chemistry and Biochemistry and Laboratory for Surface Studies, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, United States
| | - J. Anibal Boscoboinik
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Deyu Lu
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
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9
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Liu C, Zhu L, Wen X, Yang Y, Li YW, Jiao H. Exploring direct and hydrogen-assisted CO activation on iridium surfaces – surface dependent activity. Catal Sci Technol 2020. [DOI: 10.1039/c9cy02559f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
To understand CO activation on iridium surfaces, direct dissociation, H-assisted activation and hydrogenation to methanol were computed on the flat Ir(111) and Ir(100), corrugated Ir(110) and Ir(210), and stepped Ir(311) and Ir(221) surfaces.
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Affiliation(s)
- Chunli Liu
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan
- China
| | - Ling Zhu
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan
- China
| | - Xiaodong Wen
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan
- China
| | - Yong Yang
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan
- China
| | - Yong-Wang Li
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan
- China
| | - Haijun Jiao
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan
- China
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10
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Henß AK, Sakong S, Messer PK, Wiechers J, Schuster R, Lamb DC, Groß A, Wintterlin J. Density fluctuations as door-opener for diffusion on crowded surfaces. Science 2019; 363:715-718. [PMID: 30765561 DOI: 10.1126/science.aav4143] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 12/26/2018] [Indexed: 11/02/2022]
Abstract
How particles can move on a catalyst surface that, under the conditions of an industrial process, is highly covered by adsorbates and where most adsorption sites are occupied has remained an open question. We have studied the diffusion of O atoms on a fully CO-covered Ru(0001) surface by means of high-speed/variable-temperature scanning tunneling microscopy combined with density functional theory calculations. Atomically resolved trajectories show a surprisingly fast diffusion of the O atoms, almost as fast as on the clean surface. This finding can be explained by a "door-opening" mechanism in which local density fluctuations in the CO layer intermittently create diffusion pathways on which the O atoms can move with low activation energy.
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Affiliation(s)
- Ann-Kathrin Henß
- Department of Chemistry, Ludwig-Maximilians-Universität München, Germany
| | - Sung Sakong
- Institute of Theoretical Chemistry, University of Ulm, Ulm, Germany
| | - Philipp K Messer
- Department of Chemistry, Ludwig-Maximilians-Universität München, Germany
| | | | - Rolf Schuster
- Institute of Physical Chemistry, Karlsruher Institut für Technologie, Karlsruhe, Germany
| | - Don C Lamb
- Department of Chemistry, Ludwig-Maximilians-Universität München, Germany
| | - Axel Groß
- Institute of Theoretical Chemistry, University of Ulm, Ulm, Germany
| | - Joost Wintterlin
- Department of Chemistry, Ludwig-Maximilians-Universität München, Germany.
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11
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Zhao P, Cao Z, Liu X, Ren P, Cao DB, Xiang H, Jiao H, Yang Y, Li YW, Wen XD. Morphology and Reactivity Evolution of HCP and FCC Ru Nanoparticles under CO Atmosphere. ACS Catal 2019. [DOI: 10.1021/acscatal.8b05074] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Peng Zhao
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, P.R. China
| | - Zhi Cao
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| | - Xingchen Liu
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| | - Pengju Ren
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| | - Dong-Bo Cao
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| | - Hongwei Xiang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| | - Haijun Jiao
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein Strasse 29a, 18059 Rostock, Germany
| | - Yong Yang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| | - Yong-Wang Li
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| | - Xiao-Dong Wen
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
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12
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Phase Controlled Synthesis of Pt Doped Co Nanoparticle Composites Using a Metal-Organic Framework for Fischer–Tropsch Catalysis. Catalysts 2019. [DOI: 10.3390/catal9020156] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Recently, metal nanoparticles embedded in porous carbon composite materials have been playing a significant role in a variety of fields as catalyst supports, sensors, absorbents, and in energy storage. Porous carbon composite materials can be prepared using various synthetic methods; recent efforts provide a facile way to prepare the composites from metal-organic frameworks (MOFs) by pyrolysis. However, it is usually difficult to control the phase of metal or metal oxides during the synthetic process. Among many types of MOF, recently, cobalt-based MOFs have attracted attention due to their unique catalytic and magnetic properties. Herein, we report the synthesis of a Pt doped cobalt based MOF, which is subsequently converted into cobalt nanoparticle-embedded porous carbon composites (Pt@Co/C) via pyrolysis. Interestingly, the phase of the cobalt metal nanoparticles (face centered cubic (FCC) or hexagonal closest packing (HCP)) can be controlled by tuning the synthetic conditions, including the temperature, duration time, and dosage of the reducing agent (NaBH4). The Pt doped Co/C was characterized using various techniques including PXRD (powder X-ray diffraction), XPS (X-ray photoelectron spectroscopy), gas sorption analysis, TEM (transmission electron microscopy), and SEM (scanning electron microscopy). The composite was applied as a phase transfer catalyst (PTC). The Fischer-Tropsch catalytic activity of the Pt@Co/C (10:1:2.4) composite shows 35% CO conversion under a very low pressure of syngas (1 MPa). This is one of the best reported conversion rates at low pressure. The 35% CO conversion leads to the generation of various hydrocarbons (C1, C2–C4, C5, and waxes). This catalyst may also prove useful for energy and environmental applications.
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13
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Liu J, Hibbitts D, Iglesia E. Dense CO Adlayers as Enablers of CO Hydrogenation Turnovers on Ru Surfaces. J Am Chem Soc 2017; 139:11789-11802. [PMID: 28825476 DOI: 10.1021/jacs.7b04606] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
High CO* coverages lead to rates much higher than Langmuirian treatments predict because co-adsorbate interactions destabilize relevant transition states less than their bound precursors. This is shown here by kinetic and spectroscopic data-interpreted by rate equations modified for thermodynamically nonideal surfaces-and by DFT treatments of CO-covered Ru clusters and lattice models that mimic adlayer densification. At conditions (0.01-1 kPa CO; 500-600 K) which create low CO* coverages (0.3-0.8 ML from in situ infrared spectra), turnover rates are accurately described by Langmuirian models. Infrared bands indicate that adlayers nearly saturate and then gradually densify as pressure increases above 1 kPa CO, and rates become increasingly larger than those predicted from Langmuir treatments (15-fold at 25 kPa and 70-fold at 1 MPa CO). These strong rate enhancements are described here by adapting formalisms for reactions in nonideal and nearly incompressible media (liquids, ultrahigh-pressure gases) to handle the strong co-adsorbate interactions within the nearly incompressible CO* adlayer. These approaches show that rates are enhanced by densifying CO* adlayers because CO hydrogenation has a negative activation area (calculated by DFT), analogous to how increasing pressure enhances rates for liquid-phase reactions with negative activation volumes. Without these co-adsorbate effects and the negative activation area of CO activation, Fischer-Tropsch synthesis would not occur at practical rates. These findings and conceptual frameworks accurately treat dense surface adlayers and are relevant in the general treatment of surface catalysis as it is typically practiced at conditions leading to saturation coverages of reactants or products.
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Affiliation(s)
- Jianwei Liu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum , Qingdao 266580, China.,Department of Chemical and Biomolecular Engineering, University of California , Berkeley, California 94720, United States
| | - David Hibbitts
- Department of Chemical and Biomolecular Engineering, University of California , Berkeley, California 94720, United States.,Department of Chemical Engineering, University of Florida , Gainesville, Florida 32611, United States
| | - Enrique Iglesia
- Department of Chemical and Biomolecular Engineering, University of California , Berkeley, California 94720, United States
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14
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Pachecka M, Sturm JM, Lee CJ, Bijkerk F. Adsorption and Dissociation of CO 2 on Ru(0001). THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2017; 121:6729-6735. [PMID: 28413569 PMCID: PMC5388902 DOI: 10.1021/acs.jpcc.7b00021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Revised: 03/02/2017] [Indexed: 06/07/2023]
Abstract
The adsorption and dissociation of carbon dioxide on a Ru(0001) single crystal surface was investigated by reflection-absorption infrared spectroscopy (RAIRS) and temperature-programmed desorption (TPD) spectroscopy for CO2 adsorbed at 85 K. RAIRS spectroscopy shows that the adsorption of CO2 on a Ru(0001) single crystal is partially dissociative, resulting in CO2 and CO. The CO vibrational mode was also observed to split into two distinct modes, indicating two general populations of CO present at the surface. Furthermore, a time-dependent blue-shift is observed, which is characteristic of increasing CO surface coverage. TPD showed that coverages of up to 0.3 ML were obtained, and no evidence for chemisorption of oxygen on ruthenium was found.
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15
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Tian X, Wang T, Jiao H. Mechanism of coverage dependent CO adsorption and dissociation on the Mo(100) surface. Phys Chem Chem Phys 2017; 19:2186-2192. [PMID: 28045154 DOI: 10.1039/c6cp08129k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanism of coverage dependent CO adsorption and dissociation on the Mo(100) surface was investigated using periodic density functional theory. Structure optimization and frequency calculation were carried out using the GGA-PBE method and a p(3 × 3) supercell model. Energetic data have been obtained using the revised PBE method and the PBE optimized structures. CO adsorption prefers tilted adsorption configuration at the 4-fold hollow sites at low coverage and tilted and atop configurations at high coverage. The computed C-O stretching frequencies of the tilted and atop adsorbed CO molecules agree very well with the experimental results. Starting from the saturation coverage, five binding states have been found: two for molecular (α) CO adsorption and three for dissociative (β) CO adsorption, which are in agreement with the temperature-programmed desorption experiments. In addition, CO prefers dissociation with very low barriers in all coverages as long as free sites are available and is coverage independent; this nicely explains the observed CO dissociation at very low temperatures. All such agreements validate our computational methods and provide the basis of further studies.
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Affiliation(s)
- Xinxin Tian
- Institute of Molecular Science, Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, Shanxi University, Taiyuan 030006, China
| | - Tao Wang
- Univ Lyon, Ens de Lyon, CNRS, Université Lyon 1, Laboratoire de Chimie UMR 5182, F-69342, Lyon, France
| | - Haijun Jiao
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein Strasse 29a, 18059 Rostock, Germany.
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16
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Yang K, Zhang M, Yu Y. Theoretical insights into the effect of terrace width and step edge coverage on CO adsorption and dissociation over stepped Ni surfaces. Phys Chem Chem Phys 2017; 19:17918-17927. [DOI: 10.1039/c7cp03050a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We rationalized Ni(211) as a representative model for stepped surfaces and explored the effect of coverage on CO activation.
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Affiliation(s)
- Kuiwei Yang
- Key Laboratory for Green Chemical Technology of Ministry of Education
- R&D Center for Petrochemical Technology
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Minhua Zhang
- Key Laboratory for Green Chemical Technology of Ministry of Education
- R&D Center for Petrochemical Technology
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Yingzhe Yu
- Key Laboratory for Green Chemical Technology of Ministry of Education
- R&D Center for Petrochemical Technology
- Tianjin University
- Tianjin 300072
- P. R. China
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17
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Wang T, Tian X, Yang Y, Li YW, Wang J, Beller M, Jiao H. Co-adsorption and mutual interaction of nCO +mH2 on the Fe(1 1 0) and Fe(1 1 1) surfaces. Catal Today 2016. [DOI: 10.1016/j.cattod.2015.07.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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18
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Wijzenbroek M, Kroes GJ. An ab initio molecular dynamics study of D2 dissociation on CO-precovered Ru(0001). Phys Chem Chem Phys 2016; 18:21190-201. [DOI: 10.1039/c6cp00291a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In dynamics studies of hydrogen dissociation on CO pre-covered Ru(0001) the simulation cell size is important for describing energy exchange.
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Affiliation(s)
- M. Wijzenbroek
- Leiden Institute of Chemistry
- Gorlaeus Laboratories
- Leiden University
- Leiden
- The Netherlands
| | - G. J. Kroes
- Leiden Institute of Chemistry
- Gorlaeus Laboratories
- Leiden University
- Leiden
- The Netherlands
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