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Song L, Chen D, Pan J, Hu X, Shen X, Huan Y, Wei T. B-Site Super-Excess Design Sr 2V 0.4Fe 0.9Mo 0.7O 6-δ-Ni 0.4 as a Highly Active and Redox-Stable Solid Oxide Fuel Cell Anode. ACS APPLIED MATERIALS & INTERFACES 2023; 15:48296-48303. [PMID: 37812387 DOI: 10.1021/acsami.3c11271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
In-situ exsolution type perovskites as solid oxide fuel cell (SOFCs) anode materials have received widespread attention because of their excellent catalytic activity. In this study, excessive NiO is introduced to the Sr2V0.4Fe0.9Mo0.7O6-δ (SVFMO) perovskite with the B-site excess design, and in-situ growth of FeNi3 alloy nanoparticles is induced in the reducing atmosphere to form the Sr2V0.4Fe0.9Mo0.7O6-δ-Ni0.4 (SVFMO-Ni0.4) composite anode. Here, with H2 or CH4 as SOFCs fuel gas, the formation of FeNi3 nanoparticles further enhances the catalytic ability. Compared with SVFMO, the maximum power density (Pmax) of Sr2V0.4Fe0.9Mo0.7O6-δ-Ni0.4 (SVFMO-Ni0.4) increases from 538 to 828 mW cm-2 at 850 °C with hydrogen as the fuel gas, and the total polarization resistance (RP) decreases from 0.23 to 0.17 Ω cm2. In addition, the long-term operational stability of the SVFMO-Ni0.4 anode shows no apparent performance degradation for more than 300 h. Compared with SVFMO, the Pmax of SVFMO-Ni0.4 increases from 138 to 464 mW cm-2 with methane as fuel gas, and the RP decreases from 1.21 to 0.29 Ω cm2.
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Affiliation(s)
- Lemei Song
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
| | - Dezhi Chen
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
| | - Jianlong Pan
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
| | - Xun Hu
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
| | - Xuesong Shen
- Shandong Guochuang Fuel Cell Technology Innovation Center Co., Ltd., Weifang, Shandong 261061, China
| | - Yu Huan
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
| | - Tao Wei
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
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2
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Asencios YJO, Yigit N, Wicht T, Stöger-Pollach M, Lucrédio AF, Marcos FCF, Assaf EM, Rupprechter G. Partial Oxidation of Bio-methane over Nickel Supported on MgO-ZrO 2 Solid Solutions. Top Catal 2023; 66:1539-1552. [PMID: 37830054 PMCID: PMC10564672 DOI: 10.1007/s11244-023-01822-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/19/2023] [Indexed: 10/14/2023]
Abstract
Syngas can be produced from biomethane via Partial Oxidation of Methane (POM), being an attractive route since it is ecofriendly and sustainable. In this work, catalysts of Ni supported on MgO-ZrO2 solid solutions, prepared by a one-step polymerization method, were characterized by HRTEM/EDX, XRD, XPS, H2-TPR, and in situ XRD. All catalysts, including Ni/ZrO2 and Ni/MgO as reference, were tested for POM (CH4:O2 molar ratio 2, 750 ºC, 1 atm). NiO/MgO/ZrO2 contained two solid-solutions, MgO-ZrO2 and NiO-MgO, as revealed by XRD and XPS. Ni (30 wt%) supported on MgO-ZrO2 solid solution exhibited high methane conversion and hydrogen selectivity. However, depending on the MgO amount (0, 4, 20, 40, 100 molar percent) major differences in NiO reducibility, growth of Ni0 crystallite size during H2 reduction and POM, and in carbon deposition rates were observed. Interestingly, catalysts with lower MgO content achieved the highest CH4 conversion (~ 95%), high selectivity to H2 (1.7) and CO (0.8), and low carbon deposition rates (0.024 g carbon.gcat-1 h-1) with Ni4MgZr (4 mol% MgO) turning out to be the best catalyst. In situ XRD during POM indicated metallic Ni nanoparticles (average crystallite size of 31 nm), supported by MgO-ZrO2 solid solution, with small amounts of NiO-MgO being present as well. The presence of MgO also influenced the morphology of the carbon deposits, leading to filaments instead of amorphous carbon. A combustion-reforming mechanism is suggested and using a MgO-ZrO2 solid solution support strongly improves catalytic performance, which is attributed to effective O2, CO2 and H2O activation at the Ni/MgO-ZrO2 interface.
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Affiliation(s)
- Yvan J. O. Asencios
- Institute of Materials Chemistry, Technische Universität Wien, Getreidemarkt 9/BC/01, 1060 Vienna, Austria
- Institute of Marine Sciences, Universidade Federal de São Paulo, R. Maria Máximo 168, Santos, SP 11030-100 Brazil
| | - Nevzat Yigit
- Institute of Materials Chemistry, Technische Universität Wien, Getreidemarkt 9/BC/01, 1060 Vienna, Austria
| | - Thomas Wicht
- Institute of Materials Chemistry, Technische Universität Wien, Getreidemarkt 9/BC/01, 1060 Vienna, Austria
| | - Michael Stöger-Pollach
- University Service Center for Transmission Electron Microscopy, Technische Universität Wien, Austria, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria
| | - Alessandra F. Lucrédio
- São Carlos Institute of Chemistry, Universidade de São Paulo, Av. Trab. São Carlense 400, São Carlos, SP 13566-590 Brazil
| | - Francielle C. F. Marcos
- São Carlos Institute of Chemistry, Universidade de São Paulo, Av. Trab. São Carlense 400, São Carlos, SP 13566-590 Brazil
| | - Elisabete M. Assaf
- São Carlos Institute of Chemistry, Universidade de São Paulo, Av. Trab. São Carlense 400, São Carlos, SP 13566-590 Brazil
| | - Günther Rupprechter
- Institute of Materials Chemistry, Technische Universität Wien, Getreidemarkt 9/BC/01, 1060 Vienna, Austria
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Yang Z, Liu X, Jia L, wang F, Liu T, Xia Y, Xue H. Regulation of Oxygen Vacancies in Ceria-Zirconia Nanocatalysts by Pluronic P123-Templated for Room Temperature Formaldehyde Total Oxidation. Catal Letters 2023. [DOI: 10.1007/s10562-023-04321-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
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Dry Reforming of Methane with Mesoporous Ni/ZrO2 Catalyst. INTERNATIONAL JOURNAL OF CHEMICAL ENGINEERING 2022. [DOI: 10.1155/2022/3139696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Dry reforming of methane has exhibited significant environmental benefits as it utilizes two major greenhouse gases (CO2 and CH4) to produce synthesis gas, a major building block for hydrocarbons. This process has gained industrial attention as catalyst deactivation due to coke deposition being a major hindrance. The present study focuses on the dry reforming of methane over Ni-supported mesoporous zirconia support. Ni metal was loaded over in-house synthesized mesoporous zirconia within the 0–15 wt% range using the wet impregnation method. The physicochemical properties of the synthesized catalysts were studied using various characterization techniques, namely, XRD, SEM, FTIR, TGA, and N2 adsorption-desorption techniques. The activity of all the catalysts was evaluated at 750°C and gas hourly space velocity (GHSV) of 72000 ml/h/gcat for 9 hours (540 min). The deactivation factor indicating a loss in conversion with time is reported for each catalyst. 10 wt% Ni/ZrO2 showed the highest feed conversion of about 68.8% for methane and 70.2% for carbon dioxide and the highest stability (15.1% deactivation factor and 21% weight loss) for dry reforming of methane to synthesis gas.
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Pham CQ, Nguyen VP, Van TT, Phuong PT, Pham PT, Trinh TH, Nguyen TM. Syngas Production from Biogas Reforming: Role of the Support in Nickel-based Catalyst Performance. Top Catal 2022. [DOI: 10.1007/s11244-022-01750-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Haug L, Thurner C, Bekheet MF, Bischoff B, Gurlo A, Kunz M, Sartory B, Penner S, Klötzer B. Zirconium Carbide Mediates Coke‐Resistant Methane Dry Reforming on Nickel‐Zirconium Catalysts. Angew Chem Int Ed Engl 2022; 61:e202213249. [PMID: 36379010 PMCID: PMC10100075 DOI: 10.1002/anie.202213249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Indexed: 11/16/2022]
Abstract
Graphitic deposits anti-segregate into Ni0 nanoparticles to provide restored CH4 adsorption sites and near-surface/dissolved C atoms, which migrate to the Ni0 /ZrO2 interface and induce local Zrx Cy formation. The resulting oxygen-deficient carbidic phase boundary sites assist in the kinetically enhanced CO2 activation toward CO(g). This interface carbide mechanism allows for enhanced spillover of carbon to the ZrO2 support, and represents an alternative catalyst regeneration pathway with respect to the reverse oxygen spillover on Ni-CeZrx Oy catalysts. It is therefore rather likely on supports with limited oxygen storage/exchange kinetics but significant carbothermal reducibility.
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Affiliation(s)
- Leander Haug
- Institute of Physical Chemistry University of Innsbruck Innrain 52 c 6020 Innsbruck Austria
| | - Christoph Thurner
- Institute of Physical Chemistry University of Innsbruck Innrain 52 c 6020 Innsbruck Austria
| | - Maged F. Bekheet
- Fachgebiet Keramische Werkstoffe Institut für Werkstoffwissenschaften und -technologien Technische Universität Berlin, Straße des 17. Juni 135 10623 Berlin Germany
| | - Benjamin Bischoff
- Fachgebiet Keramische Werkstoffe Institut für Werkstoffwissenschaften und -technologien Technische Universität Berlin, Straße des 17. Juni 135 10623 Berlin Germany
| | - Aleksander Gurlo
- Fachgebiet Keramische Werkstoffe Institut für Werkstoffwissenschaften und -technologien Technische Universität Berlin, Straße des 17. Juni 135 10623 Berlin Germany
| | - Martin Kunz
- Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
| | - Bernhard Sartory
- Materials Center Leoben Forschung GmbH Roseggerstrasse 12 8700 Leoben Austria
| | - Simon Penner
- Institute of Physical Chemistry University of Innsbruck Innrain 52 c 6020 Innsbruck Austria
| | - Bernhard Klötzer
- Institute of Physical Chemistry University of Innsbruck Innrain 52 c 6020 Innsbruck Austria
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Haug L, Thurner C, Bekheet MF, Bischoff B, Gurlo A, Kunz M, Sartory B, Penner S, Klötzer B. Zirkonkarbid ermöglicht verkokungsresistente Methan‐Trockenreformierung auf Nickel‐Zirkon‐Katalysatoren. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202213249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Leander Haug
- Institut für Physikalische Chemie Universität Innsbruck Innrain 52 c 6020 Innsbruck Österreich
| | - Christoph Thurner
- Institut für Physikalische Chemie Universität Innsbruck Innrain 52 c 6020 Innsbruck Österreich
| | - Maged F. Bekheet
- Fachgebiet Keramische Werkstoffe Institut für Werkstoffwissenschaften und -technologien Technische Universität Berlin, Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Benjamin Bischoff
- Fachgebiet Keramische Werkstoffe Institut für Werkstoffwissenschaften und -technologien Technische Universität Berlin, Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Aleksander Gurlo
- Fachgebiet Keramische Werkstoffe Institut für Werkstoffwissenschaften und -technologien Technische Universität Berlin, Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Martin Kunz
- Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
| | - Bernhard Sartory
- Materials Center Leoben Forschung GmbH Roseggerstrasse 12 8700 Leoben Österreich
| | - Simon Penner
- Institut für Physikalische Chemie Universität Innsbruck Innrain 52 c 6020 Innsbruck Österreich
| | - Bernhard Klötzer
- Institut für Physikalische Chemie Universität Innsbruck Innrain 52 c 6020 Innsbruck Österreich
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Smal E, Bespalko Y, Arapova M, Fedorova V, Valeev K, Eremeev N, Sadovskaya E, Krieger T, Glazneva T, Sadykov V, Simonov M. Carbon Formation during Methane Dry Reforming over Ni-Containing Ceria-Zirconia Catalysts. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12203676. [PMID: 36296866 PMCID: PMC9607641 DOI: 10.3390/nano12203676] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/14/2022] [Accepted: 10/17/2022] [Indexed: 06/12/2023]
Abstract
Two series of Ni/Ce(Ti/Nb)ZrO2 catalysts were prepared using citrate route and original solvothermal continuous flow synthesis in supercritical isopropanol and studied in dry reforming of methane (DRM). TEM, XPS and FTIRS of adsorbed CO confirm influence of support composition and preparation method on the catalysts' morphology and surface features. The oxygen mobility was studied by isotope heteroexchange with C18O2. After testing in DRM, carbon deposits after catalysts' testing in DRM were investigated by temperature-programmed oxidation with thermo-gravimetric analysis. The lowest amounts of carbon deposits were obtained for unmodified Ni-CeZr and Ni-CeNbZr compositions. Ti addition lead to an increased amount of carbon, which was removed at higher temperatures. The use of supercritical supports also resulted in the formation of a higher amount of coke. Catalysts prepared by the supercritical synthesis were tested in DRM for 25 h. The highest activity drop was observed in the first three hours. For all compositions, close values of carbon deposits were revealed.
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Shi Y, Han K, Wang F. Ni-Cu Alloy Nanoparticles Confined by Physical Encapsulation with SiO 2 and Chemical Metal-Support Interaction with CeO 2 for Methane Dry Reforming. Inorg Chem 2022; 61:15619-15628. [PMID: 36129231 DOI: 10.1021/acs.inorgchem.2c02466] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Fabrication of sintering- and carbon-free Ni catalysts for methane dry reforming (MDR), which is attractive to upgrade greenhouse gases CH4 and CO2, is challenging. In this work, we innovatively synthesized Ni-Cu alloy nanoparticles confined by physical encapsulation and chemical metal-support interaction (MSI); the synergism of alloy effect, size effect, MSI, and confinement effect in the catalysts gave high rates of CH4 and CO2 of 6.98 and 7.16 mmol/(gNis), respectively, at 1023 K for 50 h. The rates were 2-3 times enhanced compared to those in the literature. XRD, TEM, H2-TPR, and so forth revealed that the alloy effect, size effect, and MSI of Ni-Cu and CeO2 enhanced the MDR activity; MSI promoted the ceria surface lattice oxygen mobility and generated more oxygen vacancies, almost completely gasifying carbon deposits; chemical confinement from MSI and physical confinement from SiO2 nanospheres realized sintering-free alloys and CeO2 nanoparticles. The synergistic approach provides a universal strategy for sintering- and carbon-free Ni catalyst design for MDR reaction.
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Affiliation(s)
- Yu Shi
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 202123, China
| | - Kaihang Han
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 202123, China
| | - Fagen Wang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 202123, China.,Chinese Academy of Sciences Key Laboratory of Renewable Energy, Guangzhou 510640, China
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Zhao Y, Qi L, Cheng Z, Zhou Z. Syngas Production via Combined Steam and Carbon Dioxide Reforming of Methane over Ni-Ce xM 1–xO 2 (M = Ti or Zr) Catalysts. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yue Zhao
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Lin Qi
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Zhenmin Cheng
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Zhiming Zhou
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
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Nemiwal M, Sillanpaa M, Banat F, Kumar D. CeO2-encapsulated metal nanoparticles: Synthesis, properties and catalytic applications. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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12
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High performance Ni-catalysts supported on rare-earth zirconates (La and Y) for hydrogen production through ethanol steam reforming. Characterization and assay. Catal Today 2022. [DOI: 10.1016/j.cattod.2021.07.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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13
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Vikanova KV, Redina EA, Kapustin GI, Mishin IV, Davshan NA, Kustov LM. Selective hydrogenation of α,β-unsaturated aldehydes over Pt supported on cerium–zirconium mixed oxide of different composition. MENDELEEV COMMUNICATIONS 2022. [DOI: 10.1016/j.mencom.2022.07.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Ni-CeO2/SBA-15 Catalyst Prepared by Glycine-Assisted Impregnation Method for Low-Temperature Dry Reforming of Methane. CRYSTALS 2022. [DOI: 10.3390/cryst12050713] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Developing low-temperature nickel-based catalysts with good resistance to coking and sintering for dry reforming of methane (DRM) is of great significance. In this work, Ni (5 wt%) and CeO2 (5 wt%) were supported on SBA-15 porous material by glycine-assisted impregnation method to obtain Ni-CeO2/SBA-15-G catalyst. XRD and TEM results showed that the addition of glycine can effectively promote the dispersion of NiO and CeO2 in the pores of SBA-15. H2-TPR and XPS results confirmed the formation of stronger metal-support interaction. In addition, after the addition of glycine, the NixCe1−xOy solid solution content was increased significantly, meanwhile, the Ce3+ concentration was increased from 31% to 49%, accompanied by more oxygen vacancies and generation of active oxygen species. For the above reasons, Ni-CeO2/SBA-15-G had better catalytic performance in the low-temperature DRM test (20 h, 600 °C) with high GHSV (600,000 mL/gcat/h), its CH4 conversion after reaction of 20 h was 2 times that of Ni-CeO2/SBA-15-C catalyst prepared by a conventional impregnation method. TGA-DTA test also proved that Ni-CeO2/SBA-15-G almost completely eliminated carbon deposition. The above advantages of the Ni-CeO2/SBA-15-G catalyst may have originated from the complexation of glycine with metal cations and can prevent them from gathering.
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Al-Fatesh AS, Patel R, Srivastava VK, Ibrahim AA, Naeem MA, Fakeeha AH, Abasaeed AE, Alquraini AA, Kumar R. Barium-Promoted Yttria-Zirconia-Supported Ni Catalyst for Hydrogen Production via the Dry Reforming of Methane: Role of Barium in the Phase Stabilization of Cubic ZrO 2. ACS OMEGA 2022; 7:16468-16483. [PMID: 35601323 PMCID: PMC9118375 DOI: 10.1021/acsomega.2c00471] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Accepted: 04/20/2022] [Indexed: 06/15/2023]
Abstract
Developing cost-effective nonprecious active metal-based catalysts for syngas (H2/CO) production via the dry reforming of methane (DRM) for industrial applications has remained a challenge. Herein, we utilized a facile and scalable mechanochemical method to develop Ba-promoted (1-5 wt %) zirconia and yttria-zirconia-supported Ni-based DRM catalysts. BET surface area and porosity measurements, infrared, ultraviolet-visible, and Raman spectroscopy, transmission electron microscopy, and temperature-programmed cyclic (reduction-oxidation-reduction) experiments were performed to characterize and elucidate the catalytic performance of the synthesized materials. Among different catalysts tested, the inferior catalytic performance of 5Ni/Zr was attributed to the unstable monoclinic ZrO2 support and weakly interacting NiO species whereas the 5Ni/YZr system performed better because of the stable cubic ZrO2 phase and stronger metal-support interaction. It is established that the addition of Ba to the catalysts improves the oxygen-endowing capacity and stabilization of the cubic ZrO2 and BaZrO3 phases. Among the Ba-promoted catalysts, owing to the optimal active metal particle size and excess ionic CO3 2- species, the 5Ni4Ba/YZr catalyst demonstrated a high, stable H2 yield (i.e., 79% with a 0.94 H2/CO ratio) for up to 7 h of time on stream. The 5Ni4Ba/YZr catalyst had the highest H2 formation rate, 1.14 mol g-1 h-1 and lowest apparent activation energy, 20.07 kJ/mol, among all zirconia-supported Ni catalyst systems.
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Affiliation(s)
- Ahmed Sadeq Al-Fatesh
- Chemical Engineering
Department, College of Engineering, King
Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
| | - Rutu Patel
- Department of Chemistry, Sankalchand Patel
University, Visnagar, Gujarat, India 384315
| | | | - Ahmed Aidid Ibrahim
- Chemical Engineering
Department, College of Engineering, King
Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
| | - Muhammad Awais Naeem
- ETH Zürich, Department of Mechanical and Process Engineering, CH 8092 Zürich, Switzerland
| | - Anis Hamza Fakeeha
- Chemical Engineering
Department, College of Engineering, King
Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
| | - Ahmed Elhag Abasaeed
- Chemical Engineering
Department, College of Engineering, King
Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
| | - Abdullah Ali Alquraini
- Chemical Engineering
Department, College of Engineering, King
Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
| | - Rawesh Kumar
- Department of Chemistry, Indus
University, Ahmedabad, Gujarat, India 382115
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Sophiana IC, Iskandar F, Devianto H, Nishiyama N, Budhi YW. Coke-Resistant Ni/CeZrO 2 Catalysts for Dry Reforming of Methane to Produce Hydrogen-Rich Syngas. NANOMATERIALS 2022; 12:nano12091556. [PMID: 35564265 PMCID: PMC9101300 DOI: 10.3390/nano12091556] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 04/16/2022] [Accepted: 04/27/2022] [Indexed: 02/06/2023]
Abstract
Dry reforming of methane was studied over high-ratio zirconia in ceria-zirconia-mixed oxide-supported Ni catalysts. The catalyst was synthesized using co-precipitation and impregnation methods. The effects of the catalyst support and Ni composition on the physicochemical characteristics and performance of the catalysts were investigated. Characterization of the physicochemical properties was conducted using X-ray diffraction (XRD), N2-physisorption, H2-TPR, and CO2-TPD. The results of the activity and stability evaluations of the synthesized catalysts over a period of 240 min at a temperature of 700 °C, atmospheric pressure, and WHSV of 60,000 mL g−1 h−1 showed that the 10%Ni/CeZrO2 catalyst exhibited the highest catalytic performance, with conversions of CH4 and CO2 up to 74% and 55%, respectively, being reached. The H2/CO ratio in the product was 1.4, which is higher than the stoichiometric ratio of 1, indicating a higher formation of H2. The spent catalysts showed minimal carbon deposition based on the thermo-gravimetry analysis, which was <0.01 gC/gcat, so carbon deposition could be neglected.
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Affiliation(s)
- Intan Clarissa Sophiana
- Department of Chemical Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Bandung 40132, Indonesia; (I.C.S.); (H.D.)
- Research Center for Nanoscience and Nanotechnology, Institut Teknologi Bandung, Bandung 40132, Indonesia
| | - Ferry Iskandar
- Research Center for Nanoscience and Nanotechnology, Institut Teknologi Bandung, Bandung 40132, Indonesia
- Department of Physics, Faculty of Mathematics and Natural Science, Institut Teknologi Bandung, Bandung 40132, Indonesia;
| | - Hary Devianto
- Department of Chemical Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Bandung 40132, Indonesia; (I.C.S.); (H.D.)
| | - Norikazu Nishiyama
- Department of Chemical Engineering, Engineering Science School, Osaka University, Osaka 565-0871, Japan;
| | - Yogi Wibisono Budhi
- Department of Chemical Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Bandung 40132, Indonesia; (I.C.S.); (H.D.)
- Research Center for Nanoscience and Nanotechnology, Institut Teknologi Bandung, Bandung 40132, Indonesia
- Correspondence:
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Sustainable Synthesis of a Highly Stable and Coke-Free Ni@CeO2 Catalyst for the Efficient Carbon Dioxide Reforming of Methane. Catalysts 2022. [DOI: 10.3390/catal12040423] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
A facile and green synthetic strategy is developed in this paper for the construction of an efficient catalyst for the industrially important carbon dioxide reforming of methane, which is also named the dry reforming of methane (DRM). Through controlling the synthetic strategy and Ni content, a high-performance Ni@CeO2 catalyst was successfully fabricated. The catalyst showed superb efficiency for producing the syngas with high and stable conversions at prolonged operating conditions. Incorporating Ni during the ceria (CeO2) crystallization resulted in a more stable structure and smaller nanoparticle (NP) size with a more robust interaction with the support than loading Ni on CeO2 supports by the conventional impregnation method. The H2/CO ratio was almost 1.0, indicating the promising applicability of utilizing the obtained syngas for the Fischer–Tropsch process to produce worthy chemicals. No carbon deposits were observed over the as-synthesized catalyst after operating the DRM reaction for 50.0 h, even at a more coke-favoring temperature (700 ∘C). Owing to the superb resistance to coke and sintering, control of the size of the Ni-NPs, uniform dispersion of the active phase, and potent metal interaction with the support, the synthesized catalyst achieved a magnificent catalytic activity and durability during serving for the DRM reaction for extended operating periods.
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Kurdi AN, Ibrahim AA, Al-Fatesh AS, Alquraini AA, Abasaeed AE, Fakeeha AH. Hydrogen production from CO 2 reforming of methane using zirconia supported nickel catalyst. RSC Adv 2022; 12:10846-10854. [PMID: 35424981 PMCID: PMC8988273 DOI: 10.1039/d2ra00789d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Accepted: 04/01/2022] [Indexed: 11/24/2022] Open
Abstract
The use of hydrogen as an alternative fuel is an attractive and promising technology as it contributes to the reduction of environmentally harmful gases. Finding environmentally friendly cheap active metal-based catalysts for H2 rich syngas via dry reforming of methane (DRM) for industrial applications has posed a challenge. In this paper, H2 production via CO2 reforming of methane was investigated over 5Ni/ZrO2 catalysts. The catalytic performance of all prepared catalysts was evaluated in a microtubular fixed bed reactor under similar reaction conditions (i.e., activation temperature at 700 °C, feed flow rate of 70 ml min−1, reaction temperature 700 °C for 440 min reaction time) of CO2 reforming of methane. Different characterization techniques such as; BET, CO2-TPD, TGA, XRPD, Raman, and TEM, were used. The study of the textural properties of catalysts established that the BET of pristine catalyst (5NiZr) was enhanced by the addition of modifiers and promoters. A bimodal TPR distribution in the reduction temperature range of 250–550 °C was recorded. In the CO2-TPD analysis, the strength of basicity came in this order: 5Ni15YZr > 5Ni10YZr > 5Ni5YZr > 5NiZr > 5Ni20YZr. The investigation of catalyst modifiers (MgO and Y2O3) resulted in the Y2O3 modifier improving the activity and catalytic performance better than MgO, which generated a hydrogen yield of 22%. 15% Y2O3 modifier loading gave the highest H2 yield 53% in the phase of different loadings of yttria. The study of the influence of promoters (Cs, Ga, and Sr) revealed that the catalytic performance of 5Ni15YZr catalysts promoted with Sr towards the H2 yield enhanced the activity to 62%. The promoted catalysts displayed lower carbon deposition compared to the unpromoted catalyst, which provided 25.6 wt% weight loss. The use of hydrogen as an alternative fuel is an attractive and promising technology as it contributes to the reduction of environmentally harmful gases.![]()
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Affiliation(s)
- Abdulrahman N Kurdi
- Chemical Engineering Department, College of Engineering, King Saud University P. O. Box 800 Riyadh 11421 Saudi Arabia +966-11-467-6859, +966-11-467-6856
| | - Ahmed A Ibrahim
- Chemical Engineering Department, College of Engineering, King Saud University P. O. Box 800 Riyadh 11421 Saudi Arabia +966-11-467-6859, +966-11-467-6856
| | - Ahmed S Al-Fatesh
- Chemical Engineering Department, College of Engineering, King Saud University P. O. Box 800 Riyadh 11421 Saudi Arabia +966-11-467-6859, +966-11-467-6856
| | - Abdullah A Alquraini
- Chemical Engineering Department, College of Engineering, King Saud University P. O. Box 800 Riyadh 11421 Saudi Arabia +966-11-467-6859, +966-11-467-6856
| | - Ahmed E Abasaeed
- Chemical Engineering Department, College of Engineering, King Saud University P. O. Box 800 Riyadh 11421 Saudi Arabia +966-11-467-6859, +966-11-467-6856
| | - Anis H Fakeeha
- Chemical Engineering Department, College of Engineering, King Saud University P. O. Box 800 Riyadh 11421 Saudi Arabia +966-11-467-6859, +966-11-467-6856
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19
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Jeon OS, Lee H, Lee KS, Paidi VK, Ji Y, Kwon OC, Kim JP, Myung JH, Park SY, Yoo YJ, Lee JG, Lee SY, Shul YG. Harnessing Strong Metal-Support Interaction to Proliferate the Dry Reforming of Methane Performance by In Situ Reduction. ACS APPLIED MATERIALS & INTERFACES 2022; 14:12140-12148. [PMID: 35238550 DOI: 10.1021/acsami.1c20889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The strong bonding at the interface between the metal and the support, which can inhibit the undesirable aggregation of metal nanoparticles and carbon deposition from reforming of hydrocarbon, is well known as the classical strong metal-support interaction (SMSI). SMSI of nanocatalysts was significantly affected by heat treatment and reducing conditions during catalyst preparation.the heat treatment and reduction conditions during catalyst preparation. SMSI can be weakened by the decrement of metal-doped sites in the supporting oxide and can often deactivate catalysts by the encapsulation of active sites through these processes. To retain SMSI near the active sites and to enhance the catalytic activity of the nanocatalyst, it is essential to increase the number of surficial metal-doped sites between nanometal and the support. Herein, we propose a mild reduction process using dry methane (CH4/CO2) gas that suppresses the aggregation of nanoparticles and increases the exposed interface between the metal and support, Ni and cerium oxide. The effects of mild reduction on the chemical state of Ni-cerium oxide nanocatalysts were specifically investigated in this study. As a result, mild reduction led to form large amounts of the Ni3+ phase at the catalyst surface of which SMSI was significantly enhanced. It can be easily fabricated while the dry reforming of methane (DRM) reaction is on stream. The superior performance of the catalyst achieved a considerably high CH4 conversion rate of approximately 60% and stable operation up to 550 h at a low temperature, 600 °C.
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Affiliation(s)
- Ok Sung Jeon
- Department of Chemical and Bio-Molecular Engineering, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Republic of Korea
- Advanced Institutes of Convergence Technology, Seoul National University, Suwon 443-270, Republic of Korea
| | - Hyesung Lee
- Department of Chemical and Bio-Molecular Engineering, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Republic of Korea
| | - Kug-Seung Lee
- Pohang Accelerator Laboratory (PAL), Pohang University of Science and Technology (POSTECH), Pohang 37673, South Korea
| | - Vinod K Paidi
- Pohang Accelerator Laboratory (PAL), Pohang University of Science and Technology (POSTECH), Pohang 37673, South Korea
| | - Yunseong Ji
- Department of Chemical and Bio-Molecular Engineering, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Republic of Korea
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 31116, Republic of Korea
| | - Oh Chan Kwon
- Department of Chemical and Bio-Molecular Engineering, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Republic of Korea
| | - Jeong Pil Kim
- Department of Chemical and Bio-Molecular Engineering, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Republic of Korea
| | - Jae-Ha Myung
- Department of Materials Science and Engineering, Incheon National University, Incheon 22012, Republic of Korea
| | - Sang Yoon Park
- Advanced Institutes of Convergence Technology, Seoul National University, Suwon 443-270, Republic of Korea
| | - Young Joon Yoo
- Advanced Institutes of Convergence Technology, Seoul National University, Suwon 443-270, Republic of Korea
| | - Jin Goo Lee
- Advanced Energy Materials and Components R&D Group, Dongnam Division, Korea Institute of Industrial Technology, 33-1, Jungang-ro, Yangsan, Gyeongsangnam-do 50623, Republic of Korea
| | - Sang-Yup Lee
- Department of Chemical and Bio-Molecular Engineering, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Republic of Korea
| | - Yong Gun Shul
- Department of Chemical and Bio-Molecular Engineering, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Republic of Korea
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20
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Jocz JN, Lyu Y, Hare BJ, Sievers C. Characterization of Surface Species during Benzene Hydroxylation over a NiO-Ceria-Zirconia Catalyst. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:458-471. [PMID: 34936356 DOI: 10.1021/acs.langmuir.1c02833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
NiO/ceria-zirconia (CZ) is a promising catalyst for the selective oxidation of benzene, as the Lewis-acidic NiO clusters can activate C-H bonds and the redox-active CZ support can activate O2 and supply active oxygen species for the reaction. In this study, we used transmission in situ infrared (IR) spectroscopy to examine surface species formed from benzene, water, oxygen, phenol, and catechol on a NiO/CZ catalyst. The formation of surface species from benzene and phenol was compared at different temperatures in the range of 50-200 °C in the presence and absence of water vapor. We also examined the role of the NiO clusters and the CZ support during benzene activation by comparing the surface species formed on NiO-CZ with those formed on a Ni-free CZ support and on a NiO/SiO2 catalyst. The spectrum of surface species from dosing benzene at 180 °C provides evidence for C-H bond activation. Specifically, the observation of C-O stretching vibrations indicates the formation of phenolate species. Introduction of water enhances these IR signals and introduces several additional peaks, indicating that a variety of different surface species are formed. These results show that NiO/CZ could catalyze direct conversion of benzene to phenol.
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Affiliation(s)
- Jennifer N Jocz
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30309, United States
| | - Yimeng Lyu
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30309, United States
| | - Bryan J Hare
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30309, United States
| | - Carsten Sievers
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30309, United States
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21
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22
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Agueniou F, Vidal H, Yeste MP, Hernández-Garrido JC, Cauqui MA, Rodríguez-Izquierdo JM, Calvino JJ, Gatica JM. Honeycomb monolithic design to enhance the performance of Ni-based catalysts for dry reforming of methane. Catal Today 2022. [DOI: 10.1016/j.cattod.2020.07.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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23
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Biliškov N. Infrared spectroscopic monitoring of solid-state processes. Phys Chem Chem Phys 2022; 24:19073-19120. [DOI: 10.1039/d2cp01458k] [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
We put a spotlight on IR spectroscopic investigations in materials science by providing a critical insight into the state of the art, covering both fundamental aspects, examples of its utilisation, and current challenges and perspectives focusing on the solid state.
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Affiliation(s)
- Nikola Biliškov
- Rudjer Bošković Institute, Bijenička c. 54, 10000 Zagreb, Croatia
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC, H3A 0B8, Canada
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24
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Yang H, Wang H, Wei L, Yang Y, Li YW, Wen XD, Jiao H. Simple mechanisms of CH 4 reforming with CO 2 and H 2O on a supported Ni/ZrO 2 catalyst. Phys Chem Chem Phys 2021; 23:26392-26400. [PMID: 34792065 DOI: 10.1039/d1cp04048k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To understand the metal-support interaction of oxide supported transition metal catalysts, we computed the reaction mechanisms of dry and steam reforming of methane on a tetragonal ZrO2(101) supported Ni catalyst. Based on the limited number of active sites on the surface, an irregular and non-ideal Ni13 cluster on ZrO2(101) is identified as a catalyst. A simple reaction mechanism is proposed, and the first direct dissociation step of CO2, CH4 and H2O is the most difficult based on the computed Gibbs free energies and no surface CHXO and CHXOH intermediates are involved, different from that on the flat Ni(111) surface. Analysis of other supported nickel catalysts shows that not only the support but also the size and shape of the metal clusters play an important role in the reaction mechanisms and kinetics.
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Affiliation(s)
- Hui Yang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China. .,National Energy Center for Coal to Liquids, Synfuels China Co., Ltd, Huairou District, Beijing, 101400, China.,University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China
| | - Hui Wang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China. .,National Energy Center for Coal to Liquids, Synfuels China Co., Ltd, Huairou District, Beijing, 101400, China.,University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China
| | - Lisha Wei
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China. .,National Energy Center for Coal to Liquids, Synfuels China Co., Ltd, Huairou District, Beijing, 101400, China.,University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China
| | - Yong Yang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China. .,National Energy Center for Coal to Liquids, Synfuels China Co., Ltd, Huairou District, Beijing, 101400, China
| | - Yong-Wang Li
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China. .,National Energy Center for Coal to Liquids, Synfuels China Co., Ltd, Huairou District, Beijing, 101400, China
| | - Xiao-Dong Wen
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China. .,National Energy Center for Coal to Liquids, Synfuels China Co., Ltd, Huairou District, Beijing, 101400, China
| | - Haijun Jiao
- Leibniz-Institut für Katalyse e. V., Albert-Einstein-Str. 29a, Rostock, 18059, Germany
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25
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Penner S. How the in situ monitoring of bulk crystalline phases during catalyst activation results in a better understanding of heterogeneous catalysis. CrystEngComm 2021; 23:6470-6480. [PMID: 34602861 PMCID: PMC8474056 DOI: 10.1039/d1ce00817j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 08/06/2021] [Indexed: 12/03/2022]
Abstract
The present Highlight article shows the importance of the in situ monitoring of bulk crystalline compounds for a more thorough understanding of heterogeneous catalysts at the intersection of catalysis, materials science, crystallography and inorganic chemistry. Although catalytic action is widely regarded as a purely surface-bound phenomenon, there is increasing evidence that bulk processes can detrimentally or beneficially influence the catalytic properties of various material classes. Such bulk processes include polymorphic transformations, formation of oxygen-deficient structures, transient phases and the formation of a metal-oxide composite. The monitoring of these processes and the subsequent establishment of structure-property relationships are most effective if carried out in situ under real operation conditions. By focusing on synchrotron-based in situ X-ray diffraction as the perfect tool to follow the evolution of crystalline species, we exemplify the strength of the concept with five examples from various areas of catalytic research. As catalyst activation studies are increasingly becoming a hot topic in heterogeneous catalysis, the (self-)activation of oxide- and intermetallic compound-based materials during methanol steam and methane dry reforming is highlighted. The perovskite LaNiO3 is selected as an example to show the complex structural dynamics before and during methane dry reforming, which is only revealed upon monitoring all intermediate crystalline species in the transformation from LaNiO3 into Ni/La2O3/La2O2CO3. ZrO2-based materials form the second group, indicating the in situ decomposition of the intermetallic compound Cu51Zr14 into an epitaxially stabilized Cu/tetragonal ZrO2 composite during methanol steam reforming, the stability of a ZrO0.31C0.69 oxycarbide and the gas-phase dependence of the tetragonal-to-monoclinic ZrO2 polymorphic transformation. The latter is the key parameter to the catalytic understanding of ZrO2 and is only appreciated in full detail once it is possible to follow the individual steps of the transformation between the crystalline polymorphic structures. A selected example is devoted to how the monitoring of crystalline reactive carbon during methane dry reforming operation aids in the mechanistic understanding of a Ni/MnO catalyst. The most important aspect is the strict use of in situ monitoring of the structural changes occurring during (self-)activation to establish meaningful structure-property relationships allowing conclusions beyond isolated surface chemical aspects.
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Affiliation(s)
- Simon Penner
- Institute of Physical Chemistry, University of Innsbruck Innrain 52c A-6020 Innsbruck Austria +4351250758003
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26
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Marinho AL, Rabelo-Neto RC, Epron F, Bion N, Noronha FB, Toniolo FS. Pt nanoparticles embedded in CeO2 and CeZrO2 catalysts for biogas upgrading: Investigation on carbon removal mechanism by oxygen isotopic exchange and DRIFTS. J CO2 UTIL 2021. [DOI: 10.1016/j.jcou.2021.101572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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27
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Rupprechter G. Operando Surface Spectroscopy and Microscopy during Catalytic Reactions: From Clusters via Nanoparticles to Meso-Scale Aggregates. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2004289. [PMID: 33694320 DOI: 10.1002/smll.202004289] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 02/16/2021] [Indexed: 05/16/2023]
Abstract
Operando characterization of working catalysts, requiring per definitionem the simultaneous measurement of catalytic performance, is crucial to identify the relevant catalyst structure, composition and adsorbed species. Frequently applied operando techniques are discussed, including X-ray absorption spectroscopy, near ambient pressure X-ray photoelectron spectroscopy and infrared spectroscopy. In contrast to these area-averaging spectroscopies, operando surface microscopy by photoemission electron microscopy delivers spatially-resolved data, directly visualizing catalyst heterogeneity. For thorough interpretation, the experimental results should be complemented by density functional theory. The operando approach enables to identify changes of cluster/nanoparticle structure and composition during ongoing catalytic reactions and reveal how molecules interact with surfaces and interfaces. The case studies cover the length-scales from clusters via nanoparticles to meso-scale aggregates, and demonstrate the benefits of specific operando methods. Restructuring, ligand/atom mobility, and surface composition alterations during the reaction may have pronounced effects on activity and selectivity. The nanoscale metal/oxide interface steers catalytic performance via a long ranging effect. Combining operando spectroscopy with switching gas feeds or concentration-modulation provides further mechanistic insights. The obtained fundamental understanding is a prerequisite for improving catalytic performance and for rational design.
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Affiliation(s)
- Günther Rupprechter
- Institute of Materials Chemistry, Technische Universität Wien, Getreidemarkt 9/BC/01, Vienna, 1060, Austria
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28
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Fakeeha AH, Al-Fatesh AS, Ibrahim AA, Abasaeed AE. CO2 reforming of CH4 over Ni-catalyst supported on yttria stabilized zirconia. JOURNAL OF SAUDI CHEMICAL SOCIETY 2021. [DOI: 10.1016/j.jscs.2021.101244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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29
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Penner S, Kheyrollahi Nezhad PD. Steering the Catalytic Properties of Intermetallic Compounds and Alloys in Reforming Reactions by Controlled in Situ Decomposition and Self-Activation. ACS Catal 2021; 11:5271-5286. [PMID: 34055455 PMCID: PMC8154320 DOI: 10.1021/acscatal.1c00718] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 04/08/2021] [Indexed: 12/28/2022]
Abstract
Based on the increasing importance of intermetallic compounds and alloys in heterogeneous catalysis, we explore the possibilities of using selected intermetallic compounds and alloy structures and phases as catalyst precursors to prepare highly active and CO2-selective methanol steam reforming (MSR) as well as dry reforming of methane (DRM) catalyst entities by controlled in situ decomposition and self-activation. The exemplary discussed examples (Cu51Zr14, CuZn, Pd2Zr, GaPd2, Cu2In, ZnPd, and InPd) show both the advantages and pitfalls of this approach and how the concept can be generalized to encompass a wider set of intermetallic compounds and alloy structures. Despite the common feature of all systems being the more or less pronounced decomposition of the intermetallic compound surface and bulk structure and the in situ formation of much more complex catalyst entities, differences arise due to the oxidation propensity and general thermodynamic stability of the chosen intermetallic compound/alloy and their constituents. The metastability and intrinsic reactivity of the evolving oxide polymorph introduced upon decomposition and the surface and bulk reactivity of carbon, governed by the nature of the metal/intermetallic compound-oxide interfacial sites, are of equal importance. Structural and chemical rearrangements, dictating the catalytic performance of the resulting entity, are present in the form of a complete destruction of the intermetallic compound bulk structure (Cu51Zr14) and the formation of an metal/oxide (Cu51Zr14, InPd) or intermetallic compound/oxide (ZnPd, Cu2In, CuZn) interface or the intertranformation of intermetallic compounds with varying composition (Pd2Zr) before the formation of Pd/ZrO2. In this Perspective, the prerequisites to obtain a leading theme for pronounced CO2 selectivity and high activity will be reviewed. Special focus will be put on raising awareness of the intrinsic properties of the discussed catalyst systems that need to be controlled to obtain catalytically prospective materials. The use of model systems to bridge the material's gap in catalysis will also be highlighted for selected examples.
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Affiliation(s)
- Simon Penner
- Department
of Physical Chemistry, University of Innsbruck, Innrain 52c, A-6020 Innsbruck, Austria
| | - Parastoo Delir Kheyrollahi Nezhad
- Department
of Physical Chemistry, University of Innsbruck, Innrain 52c, A-6020 Innsbruck, Austria
- Reactor
and Catalyst Research Lab, Department of Chemical Engineering, University of Tabriz, Tabriz, Iran
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Dry Reforming of Methane over Carbon Fibre-Supported CeZrO2, Ni-CeZrO2, Pt-CeZrO2 and Pt-Ni-CeZrO2 Catalysts. Catalysts 2021. [DOI: 10.3390/catal11050563] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Dry reforming of methane (DRM) is one of the most important processes allowing transformation of two most potent greenhouse gases into a synthesis gas. The CH4 and CO2 are converted at high temperatures in the presence of a metal catalyst (usually Ni, also promoted with noble metals, supported over various oxides). The DRM process is not widely used in the gas processing industry because of prompt deactivation of the catalyst owing to carbon deposition and the blockage of the metal active sites. This problem can be hindered by proper design of the catalyst in terms, e.g., of its composition and by providing strong interaction between active metal and catalytic support. The properties of the latter are also crucial for the catalyst’s performance in DRM and the occurrence of parallel reactions such as reverse water gas shift, CO2 deoxidation or carbon formation. In this paper we show for the first time the DRM performance of the ceria-zirconia and metal (Ni and/or Pt) supported on carbon fibres. The obtained Ni and Ni-Pt containing catalysts showed relatively high activity in the studied reaction and high resistance towards carbon deposition.
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31
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Phichairatanaphong O, Teepakakorn P, Poo-arporn Y, Chareonpanich M, Donphai W. Infiltrate Mesoporous Silica-Aluminosilicate Structure Improves Hydrogen Production via Methane Decomposition over a Nickel-Based Catalyst. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c06355] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Orrakanya Phichairatanaphong
- KU-Green Catalysts Group, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
| | - Pornphrom Teepakakorn
- KU-Green Catalysts Group, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
| | | | - Metta Chareonpanich
- KU-Green Catalysts Group, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
- Research Network of NANOTEC − KU on NanoCatalysts and NanoMaterials for Sustainable Energy and Environment, Kasetsart University, Bangkok 10900, Thailand
| | - Waleeporn Donphai
- KU-Green Catalysts Group, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
- Research Network of NANOTEC − KU on NanoCatalysts and NanoMaterials for Sustainable Energy and Environment, Kasetsart University, Bangkok 10900, Thailand
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33
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Shahnazi A, Firoozi S. Improving the catalytic performance of LaNiO3 perovskite by manganese substitution via ultrasonic spray pyrolysis for dry reforming of methane. J CO2 UTIL 2021. [DOI: 10.1016/j.jcou.2021.101455] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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Zhang F, Gutiérrez RA, Lustemberg PG, Liu Z, Rui N, Wu T, Ramírez PJ, Xu W, Idriss H, Ganduglia-Pirovano MV, Senanayake SD, Rodriguez JA. Metal-Support Interactions and C1 Chemistry: Transforming Pt-CeO 2 into a Highly Active and Stable Catalyst for the Conversion of Carbon Dioxide and Methane. ACS Catal 2021; 11:1613-1623. [PMID: 34164226 PMCID: PMC8210818 DOI: 10.1021/acscatal.0c04694] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 12/22/2020] [Indexed: 12/21/2022]
Abstract
![]()
There
is an ongoing search for materials which can accomplish the
activation of two dangerous greenhouse gases like carbon dioxide and
methane. In the area of C1 chemistry, the reaction between CO2 and CH4 to produce syngas (CO/H2),
known as methane dry reforming (MDR), is attracting a lot of interest
due to its green nature. On Pt(111), high temperatures must be used
to activate the reactants, leading to a substantial deposition of
carbon which makes this metal surface useless for the MDR process.
In this study, we show that strong metal–support interactions
present in Pt/CeO2(111) and Pt/CeO2 powders
lead to systems which can bind CO2 and CH4 well
at room temperature and are excellent and stable catalysts for the
MDR process at moderate temperature (500 °C). The behavior of
these systems was studied using a combination of in situ/operando methods (AP-XPS, XRD, and XAFS) which pointed to an active Pt-CeO2-x interface. In this interface, the
oxide is far from being a passive spectator. It modifies the chemical
properties of Pt, facilitating improved methane dissociation, and
is directly involved in the adsorption and dissociation of CO2 making the MDR catalytic cycle possible. A comparison of
the benefits gained by the use of an effective metal-oxide interface
and those obtained by plain bimetallic bonding indicates that the
former is much more important when optimizing the C1 chemistry associated
with CO2 and CH4 conversion. The presence of
elements with a different chemical nature at the metal-oxide interface
opens the possibility for truly cooperative interactions in the activation
of C–O and C–H bonds.
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Affiliation(s)
- Feng Zhang
- Department of Materials Science and Chemical Engineering, SUNY at Stony Brook, Stony Brook, New York 11794, United States
| | - Ramón A. Gutiérrez
- Facultad de Ciencias, Universidad Central de Venezuela, Caracas 1020-A, Venezuela
| | - Pablo G. Lustemberg
- Instituto de Física Rosario (IFIR), CONICET-UNR, Bv. 27 de Febrero 210bis, Rosario, Santa Fe S2000EZP, Argentina
- Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, Madrid 28049, Spain
| | - Zongyuan Liu
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Ning Rui
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Tianpin Wu
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Pedro J. Ramírez
- Facultad de Ciencias, Universidad Central de Venezuela, Caracas 1020-A, Venezuela
- Zoneca-CENEX, R&D Laboratories, Alta Vista, Monterrey 64770, México
| | - Wenqian Xu
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Hicham Idriss
- SABIC Corporate Research & Development (CRD), KAUST, Thuwal 29355, Saudi Arabia
| | | | - Sanjaya D. Senanayake
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - José A. Rodriguez
- Department of Materials Science and Chemical Engineering, SUNY at Stony Brook, Stony Brook, New York 11794, United States
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
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35
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Wei X, Rang X, Zhu W, Xiang M, Deng Y, Jiang F, Mao R, Zhang Z, Kong X, Wang F. Morphology effect of CeO2 on Ni/CeO2 catalysts for selective hydrogenation of cinnamaldehyde. Chem Phys 2021. [DOI: 10.1016/j.chemphys.2020.111079] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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36
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Study of the perovskite-type catalysts 40LaNi0.75Fe0.25−X MXO3/SiO2 (M=Ce, Zr) for the dry reforming of methane. REACTION KINETICS MECHANISMS AND CATALYSIS 2021. [DOI: 10.1007/s11144-021-01926-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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37
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Bahamon D, Khalil M, Belabbes A, Alwahedi Y, Vega LF, Polychronopoulou K. A DFT study of the adsorption energy and electronic interactions of the SO 2 molecule on a CoP hydrotreating catalyst. RSC Adv 2021; 11:2947-2957. [PMID: 35424234 PMCID: PMC8693793 DOI: 10.1039/c9ra10634k] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 12/16/2020] [Indexed: 01/10/2023] Open
Abstract
The adsorption energy and electronic properties of sulfur dioxide (SO2) adsorbed on different low-Miller index cobalt phosphide (CoP) surfaces were examined using density functional theory (DFT). Different surface atomic terminations and initial molecular orientations were systematically investigated in detail to determine the most active and stable surface for use as a hydrotreating catalyst. It was found that the surface catalytic reactivity of CoP and its performance were highly sensitive to the crystal plane, where the surface orientation/termination had a remarkable impact on the interfacial chemical bonding and electronic states toward the adsorption of the SO2 molecule. Specifically, analysis of the surface energy adsorption revealed that SO2 on Co-terminated surfaces, especially in (010), (101) and (110) facets, is energetically more favorable compared to other low index surfaces. Charge density difference, density of states (DOS) and Gibbs free energy studies were also carried out to further understand the bonding mechanism and the electronic interactions with the adsorbate. It is anticipated that the current findings will support experimental research towards the design of catalysts for SO2 hydrodesulfurization based on cobalt phosphide nanoparticles.
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Affiliation(s)
- Daniel Bahamon
- Department of Chemical Engineering, Khalifa University P. O. Box 127788 Abu Dhabi UAE
- Center on Catalysis and Separation (CeCaS), Khalifa University P. O. Box 127788 Abu Dhabi UAE
- Research and Innovation Center on CO2 and H2 (RICH), Khalifa University P. O. 127788 Abu Dhabi UAE
| | - Malathe Khalil
- Center on Catalysis and Separation (CeCaS), Khalifa University P. O. Box 127788 Abu Dhabi UAE
- Department of Mechanical Engineering, Khalifa University P. O. Box 127788 Abu Dhabi UAE
| | - Abderrezak Belabbes
- Center on Catalysis and Separation (CeCaS), Khalifa University P. O. Box 127788 Abu Dhabi UAE
- Department of Mechanical Engineering, Khalifa University P. O. Box 127788 Abu Dhabi UAE
| | - Yasser Alwahedi
- Department of Chemical Engineering, Khalifa University P. O. Box 127788 Abu Dhabi UAE
- Center on Catalysis and Separation (CeCaS), Khalifa University P. O. Box 127788 Abu Dhabi UAE
| | - Lourdes F Vega
- Department of Chemical Engineering, Khalifa University P. O. Box 127788 Abu Dhabi UAE
- Center on Catalysis and Separation (CeCaS), Khalifa University P. O. Box 127788 Abu Dhabi UAE
- Research and Innovation Center on CO2 and H2 (RICH), Khalifa University P. O. 127788 Abu Dhabi UAE
| | - Kyriaki Polychronopoulou
- Center on Catalysis and Separation (CeCaS), Khalifa University P. O. Box 127788 Abu Dhabi UAE
- Department of Mechanical Engineering, Khalifa University P. O. Box 127788 Abu Dhabi UAE
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38
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Razmgar K, Altarawneh M, Oluwoye I, Senanayake G. Ceria-Based Catalysts for Selective Hydrogenation Reactions: A Critical Review. CATALYSIS SURVEYS FROM ASIA 2021. [DOI: 10.1007/s10563-020-09319-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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39
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Dry reforming of methane over Pt-Ni/CeO2 catalysts: Effect of the metal composition on the stability. Catal Today 2021. [DOI: 10.1016/j.cattod.2019.06.018] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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40
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Lee KM, Kwon G, Hwang S, Boscoboinik JA, Kim T. Investigation of the NO reduction by CO reaction over oxidized and reduced NiO x/CeO 2 catalysts. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01215k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
NO reduction by CO reaction was investigated by NiOx/CeO2 catalysts with different pretreatment conditions. Surface area, oxygen defect sites, and CeO2 crystallite size are closely related to the catalytic performance.
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Affiliation(s)
- Kyung-Min Lee
- Materials Science and Chemical Engineering Department, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Gihan Kwon
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973, USA
| | - Sooyeon Hwang
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973, USA
| | | | - Taejin Kim
- Materials Science and Chemical Engineering Department, Stony Brook University, Stony Brook, NY, 11794, USA
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41
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Chemical and Laser Ablation Synthesis of Monometallic and Bimetallic Ni-Based Nanoparticles. Catalysts 2020. [DOI: 10.3390/catal10121453] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The catalytic properties of nanoparticles depend on their size, shape and surface/defect structure, with the entire catalyst performance being governed by the corresponding distributions. Herein, we present two routes of mono- and bimetallic nanoparticle synthesis that enable control of the structural parameters, i.e., wet-chemical synthesis and laser ablation in liquid-phase. The latter is particularly suited to create defect-rich nanoparticles. Impregnation routes were applied to prepare Ni and NiCu nanoparticles, whereas nano- and femtosecond laser ablation in liquid-phase were employed to prepare Ni and NiAu nanoparticles. The effects of the Ni:Cu ratio in impregnation and of laser fluence and liquid-medium on laser ablation are discussed. The atomic structure and (surface) composition of the nanoparticles were characterized by electron microscopic (BF-TEM, DF-TEM, HRTEM) and spectroscopic/diffraction techniques (EDX, SAED, XPS, IR), complemented by theory (DFT). The chemically synthesized bimetallic NiCu nanoparticles initially had Cu-rich surfaces, which changed to Ni-rich upon reaction. For laser ablation, depending on conditions (fluence, type of liquid), highly defective, ordered, or core/shell-like nanoparticles were produced. The case studies highlight the specific benefits of each preparation method for catalyst synthesis and discuss the potential of nanoparticles produced by pulsed laser ablation for catalytic applications.
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42
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le Saché E, Pastor-Pérez L, Garcilaso V, Watson D, Centeno M, Odriozola J, Reina T. Flexible syngas production using a La2Zr2-xNixO7-δ pyrochlore-double perovskite catalyst: Towards a direct route for gas phase CO2 recycling. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.05.039] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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43
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Musso M, Romero M, Faccio R, Bussi J. Catalytic assessment of a Ni-La-Sn ternary metallic system in ethanol steam reforming and the influence of the Sn/La atomic ratio in the catalytic performance. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.05.043] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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44
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Kaplin IY, Lokteva ES, Golubina EV, Lunin VV. Template Synthesis of Porous Ceria-Based Catalysts for Environmental Application. Molecules 2020; 25:E4242. [PMID: 32947806 PMCID: PMC7570565 DOI: 10.3390/molecules25184242] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 09/14/2020] [Accepted: 09/14/2020] [Indexed: 01/30/2023] Open
Abstract
Porous oxide materials are widely used in environmental catalysis owing to their outstanding properties such as high specific surface area, enhanced mass transport and diffusion, and accessibility of active sites. Oxides of metals with variable oxidation state such as ceria and double oxides based on ceria also provide high oxygen storage capacity which is important in a huge number of oxidation processes. The outstanding progress in the development of hierarchically organized porous oxide catalysts relates to the use of template synthetic methods. Single and mixed oxides with enhanced porous structure can serve both as supports for the catalysts of different nature and active components for catalytic oxidation of volatile organic compounds, soot particles and other environmentally dangerous components of exhaust gases, in hydrocarbons reforming, water gas shift reaction and photocatalytic transformations. This review highlights the recent progress in synthetic strategies using different types of templates (artificial and biological, hard and soft), including combined ones, in the preparation of single and mixed oxide catalysts based on ceria, and provides examples of their application in the main areas of environmental catalysis.
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Affiliation(s)
| | - Ekaterina S. Lokteva
- Chemistry Department, Lomonosov Moscow State University, Leninskie Gory 1/3, 119991 Moscow, Russia; (I.Yu.K.); (E.V.G.); (V.V.L.)
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45
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Lyu Y, Jocz J, Xu R, Stavitski E, Sievers C. Nickel Speciation and Methane Dry Reforming Performance of Ni/CexZr1–xO2 Prepared by Different Synthesis Methods. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02426] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yimeng Lyu
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Jennifer Jocz
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Rui Xu
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Eli Stavitski
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Carsten Sievers
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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46
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Wongsartsai C, Tongnan V, Sornchamni T, Siri-nguan N, Laosiripojana N, Hartley M, Hartley UW. CO2 utilization via methanation using 40%Ni/CexCr1-xO2 as a novel catalyst: a comparative study of packed-bed and micro-channel reactors. REACTION KINETICS MECHANISMS AND CATALYSIS 2020. [DOI: 10.1007/s11144-020-01853-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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47
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Carbide-Modified Pd on ZrO2 as Active Phase for CO2-Reforming of Methane—A Model Phase Boundary Approach. Catalysts 2020. [DOI: 10.3390/catal10091000] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Starting from subsurface Zr0-doped “inverse” Pd and bulk-intermetallic Pd0Zr0 model catalyst precursors, we investigated the dry reforming reaction of methane (DRM) using synchrotron-based near ambient pressure in-situ X-ray photoelectron spectroscopy (NAP-XPS), in-situ X-ray diffraction and catalytic testing in an ultrahigh-vacuum-compatible recirculating batch reactor cell. Both intermetallic precursors develop a Pd0–ZrO2 phase boundary under realistic DRM conditions, whereby the oxidative segregation of ZrO2 from bulk intermetallic PdxZry leads to a highly active composite layer of carbide-modified Pd0 metal nanoparticles in contact with tetragonal ZrO2. This active state exhibits reaction rates exceeding those of a conventional supported Pd–ZrO2 reference catalyst and its high activity is unambiguously linked to the fast conversion of the highly reactive carbidic/dissolved C-species inside Pd0 toward CO at the Pd/ZrO2 phase boundary, which serves the role of providing efficient CO2 activation sites. In contrast, the near-surface intermetallic precursor decomposes toward ZrO2 islands at the surface of a quasi-infinite Pd0 metal bulk. Strongly delayed Pd carbide accumulation and thus carbon resegregation under reaction conditions leads to a much less active interfacial ZrO2–Pd0 state.
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48
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Yang J, Ding H, Wang J, Yigit N, Xu J, Rupprechter G, Zhang M, Li Z. Energy-Guided Shape Control Towards Highly Active CeO2. Top Catal 2020. [DOI: 10.1007/s11244-020-01357-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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49
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Spectroscopic and kinetic insights into the methane reforming over Ce-pyrochlores. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.110964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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50
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Structural, Textural, and Catalytic Properties of Ni-CexZr1−xO2 Catalysts for Methane Dry Reforming Prepared by Continuous Synthesis in Supercritical Isopropanol. ENERGIES 2020. [DOI: 10.3390/en13143728] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A series of 5%Ni-CexZr1−xO2 (x = 0.3, 0.5, 0.7) catalysts has been prepared via one-pot solvothermal continuous synthesis in supercritical isopropanol and incipient wetness impregnation of CexZr1−xO2 obtained by the same route. The textural, structural, red-ox, and catalytic properties in methane dry reforming (MDR) of Ni-modified Ce-Zr oxides synthesized by two routes have been compared. It was shown by XRD, TEM, and Raman spectroscopy that the method of Ni introduction does not affect the phase composition of the catalysts, but determines the dispersion of NiO. Despite a high dispersion of NiO and near-uniform distribution of Ni within Ce-Zr particles observed for the one-pot catalysts, they have shown a lower activity and stability in MDR as compared with impregnated ones. This is a result of a low Ni concentration in the surface layer due to segregation of Ce and decoration of nickel nanoparticles with support species.
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