1
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Bonkowski A, Wolf MJ, Wu J, Parker SC, Klein A, De Souza RA. A Single Model for the Thermodynamics and Kinetics of Metal Exsolution from Perovskite Oxides. J Am Chem Soc 2024; 146:23012-23021. [PMID: 39116036 DOI: 10.1021/jacs.4c03412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2024]
Abstract
Exsolution has emerged as an outstanding route for producing oxide-supported metal nanoparticles. For ABO3-perovskite oxides, various late transition-metal cations can be substituted into the lattice under oxidizing conditions and exsolved as metal nanoparticles after reduction. A consistent and comprehensive description of the point-defect thermodynamics and kinetics of this phenomenon is lacking, however. Herein, supported by hybrid density-functional-theory calculations, we propose a single model that explains diverse experimental observations, such as why substituent transition-metal cations (but not host cations) exsolve from perovskite oxides upon reduction; why different substituent transition-metal cations exsolve under different conditions; why the metal nanoparticles are embedded in the surface; why exsolution occurs surprisingly rapidly at relatively low temperatures; and why the reincorporation of exsolved species involves far longer times and much higher temperatures. Our model's foundation is that the substituent transition-metal cations are reduced to neutral species within the perovskite lattice as the Fermi level is shifted upward within the bandgap upon sample reduction. The calculations also indicate unconventional influences of oxygen vacancies and A-site vacancies. Our model thus provides a fundamental basis for improving existing, and creating new, exsolution-generated catalysts.
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Affiliation(s)
- Alexander Bonkowski
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52074 Aachen, Germany
| | - Matthew J Wolf
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52074 Aachen, Germany
| | - Ji Wu
- Department of Chemistry, University of Bath, Claverton Down, BA2 7AY Bath, U.K
| | - Stephen C Parker
- Department of Chemistry, University of Bath, Claverton Down, BA2 7AY Bath, U.K
| | - Andreas Klein
- Institute of Materials Science, Technical University of Darmstadt, Otto-Berndt-Str. 3, 64287 Darmstadt, Germany
| | - Roger A De Souza
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52074 Aachen, Germany
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2
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Jiang Y, Li C, Huang H, Zhang L, Zhang J, Jiang C, Chen Y, Yao Y, Ma J. A-site-deficiency range identified for in situ exsolution from (La 0.4Sr 0.6) 1-αTi 0.95Ni 0.05O 3±δ electrodes for SOFC and SOEC. NANOSCALE 2024; 16:15396-15404. [PMID: 39093055 DOI: 10.1039/d4nr02325k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
Abstract
Modulating the A-site deficiency is a useful method to achieve the exsolution of nanoparticles on the surface of perovskite, improving the catalytic activity. However, rules for designing the deficiency value and its roles on the structure and performance remain unclear. In this study, a wide range of A-site deficiencies of (La0.4Sr0.6)1-αTi0.95Ni0.05O3±δ (LSTN, α = 0.00, 0.13, 0.15, and 0.18) titanate perovskite materials was designed to systematically investigate their crystal structure, binding energy, oxygen vacancy concentration, exsolution process, and electrochemical performance. An extremely high conductivity (e.g., 331.75 S cm-1@800 °C, 5% H2/Ar) was obtained in parallel with enhanced catalytical activity in SOFC and SOEC modes. The A-site-deficient samples displayed a higher conductivity, oxygen vacancy concentration, and power output than the stoichiometric samples (α = 0.00). The best maximum power density of 78.74 mW cm-2 and the highest population density of 25 particles per μm2 were obtained on the deficient LSTN with α = 0.13. These findings suggest that LSTN is an exceptionally promising material for solid oxide cell (SOC) electrodes.
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Affiliation(s)
- Yao Jiang
- School of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong, Sichuan, 643000, PR China.
- Institute for Catalysis and Energy Solutions (ICES), University of South Africa, Roodepoort, 1710, South Africa.
| | - Chengyu Li
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100094, P. R. China.
| | - Haonan Huang
- School of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong, Sichuan, 643000, PR China.
| | - Linxi Zhang
- School of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong, Sichuan, 643000, PR China.
| | - Jingyu Zhang
- School of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong, Sichuan, 643000, PR China.
| | - Cairong Jiang
- School of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong, Sichuan, 643000, PR China.
| | - Yongjin Chen
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100094, P. R. China.
| | - Yali Yao
- Institute for Catalysis and Energy Solutions (ICES), University of South Africa, Roodepoort, 1710, South Africa.
- Zhejiang University of Technology Zhijiang College, Shaoxing, Zhejiang, 312030, P. R. China
| | - Jianjun Ma
- School of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong, Sichuan, 643000, PR China.
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3
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Carrillo AJ, López-García A, Delgado-Galicia B, Serra JM. New trends in nanoparticle exsolution. Chem Commun (Camb) 2024; 60:7987-8007. [PMID: 38899785 DOI: 10.1039/d4cc01983k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
Many relevant high-temperature chemical processes require the use of oxide-supported metallic nanocatalysts. The harsh conditions under which these processes operate can trigger catalyst degradation via nanoparticle sintering, carbon depositions or poisoning, among others. This primarily affects metallic nanoparticles created via deposition methods with low metal-support interaction. In this respect, nanoparticle exsolution has emerged as a promising method for fabricating oxide-supported nanocatalysts with high interaction between the metal and the oxide support. This is due to the mechanism involved in nanoparticle exsolution, which is based on the migration of metal cations in the oxide support to its surface, where they nucleate and grow as metallic nanoparticles partially embedded in the oxide. This anchorage confers high robustness against sintering or coking-related problems. For these reasons, exsolution has attracted great interest in the last few years. Multiple works have been devoted to proving the high catalytic stability of exsolved metallic nanoparticles in several applications for high-temperature energy storage and conversion. Additionally, considerable attention has been directed towards understanding the underlying mechanism of metallic nanoparticle exsolution. However, this growing field has not been limited to these types of studies and recent discoveries at the forefront of materials design have opened new research avenues. In this work, we define six new trends in nanoparticle exsolution, taking a tour through the most important advances that have been recently reported.
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Affiliation(s)
- Alfonso J Carrillo
- Instituto de Tecnología Química, Universitat Politècnica de València, Consejo Superior de Investigaciones Científicas, 46022 Valencia, Spain.
| | - Andrés López-García
- Instituto de Tecnología Química, Universitat Politècnica de València, Consejo Superior de Investigaciones Científicas, 46022 Valencia, Spain.
| | - Blanca Delgado-Galicia
- Instituto de Tecnología Química, Universitat Politècnica de València, Consejo Superior de Investigaciones Científicas, 46022 Valencia, Spain.
| | - Jose M Serra
- Instituto de Tecnología Química, Universitat Politècnica de València, Consejo Superior de Investigaciones Científicas, 46022 Valencia, Spain.
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4
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Timoshenko J, Rettenmaier C, Hursán D, Rüscher M, Ortega E, Herzog A, Wagner T, Bergmann A, Hejral U, Yoon A, Martini A, Liberra E, Monteiro MCDO, Cuenya BR. Reversible metal cluster formation on Nitrogen-doped carbon controlling electrocatalyst particle size with subnanometer accuracy. Nat Commun 2024; 15:6111. [PMID: 39030207 PMCID: PMC11271611 DOI: 10.1038/s41467-024-50379-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Accepted: 07/09/2024] [Indexed: 07/21/2024] Open
Abstract
Copper and nitrogen co-doped carbon catalysts exhibit a remarkable behavior during the electrocatalytic CO2 reduction (CO2RR), namely, the formation of metal nanoparticles from Cu single atoms, and their subsequent reversible redispersion. Here we show that the switchable nature of these species holds the key for the on-demand control over the distribution of CO2RR products, a lack of which has thus far hindered the wide-spread practical adoption of CO2RR. By intermitting pulses of a working cathodic potential with pulses of anodic potential, we were able to achieve a controlled fragmentation of the Cu particles and partial regeneration of single atom sites. By tuning the pulse durations, and by tracking the catalyst's evolution using operando quick X-ray absorption spectroscopy, the speciation of the catalyst can be steered toward single atom sites, ultrasmall metal clusters or large metal nanoparticles, each exhibiting unique CO2RR functionalities.
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Affiliation(s)
- Janis Timoshenko
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Berlin, Germany.
| | - Clara Rettenmaier
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Berlin, Germany
| | - Dorottya Hursán
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Berlin, Germany
| | - Martina Rüscher
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Berlin, Germany
| | - Eduardo Ortega
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Berlin, Germany
| | - Antonia Herzog
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Berlin, Germany
| | - Timon Wagner
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Berlin, Germany
| | - Arno Bergmann
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Berlin, Germany
| | - Uta Hejral
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Berlin, Germany
| | - Aram Yoon
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Berlin, Germany
| | - Andrea Martini
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Berlin, Germany
| | - Eric Liberra
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Berlin, Germany
| | | | - Beatriz Roldan Cuenya
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Berlin, Germany.
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5
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Ul Haq A, Fanelli F, Bekris L, Martin AM, Lee S, Khalid H, Savaniu CD, Kousi K, Metcalfe IS, Irvine JTS, Maguire P, Papaioannou EI, Mariotti D. Dielectric Barrier Plasma Discharge Exsolution of Nanoparticles at Room Temperature and Atmospheric Pressure. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2402235. [PMID: 38965704 DOI: 10.1002/advs.202402235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 04/18/2024] [Indexed: 07/06/2024]
Abstract
Exsolution of metal nanoparticles (NPs) on perovskite oxides has been demonstrated as a reliable strategy for producing catalyst-support systems. Conventional exsolution requires high temperatures for long periods of time, limiting the selection of support materials. Plasma direct exsolution is reported at room temperature and atmospheric pressure of Ni NPs from a model A-site deficient perovskite oxide (La0.43Ca0.37Ni0.06Ti0.94O2.955). Plasma exsolution is carried out within minutes (up to 15 min) using a dielectric barrier discharge configuration both with He-only gas as well as with He/H2 gas mixtures, yielding small NPs (<30 nm diameter). To prove the practical utility of exsolved NPs, various experiments aimed at assessing their catalytic performance for methanation from synthesis gas, CO, and CH4 oxidation are carried out. Low-temperature and atmospheric pressure plasma exsolution are successfully demonstrated and suggest that this approach could contribute to the practical deployment of exsolution-based stable catalyst systems.
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Affiliation(s)
- Atta Ul Haq
- School of Engineering, Ulster University, Belfast, BT37 0QB, UK
| | - Fiorenza Fanelli
- Institute of Nanotechnology (NANOTEC), National Research Council (CNR), via Orabona 4, Bari, 70125, Italy
- Institute of Chemistry of Organometallic Compounds (ICCOM), National Research Council (CNR), via Orabona 4, Bari, 70125, Italy
| | - Leonidas Bekris
- School of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | | | - Steve Lee
- School of Physics and Astronomy, University of St. Andrews, Scotland Fife, St. Andrews, KY16 9SS, UK
| | - Hessan Khalid
- School of Engineering, Ulster University, Belfast, BT37 0QB, UK
| | - Cristian D Savaniu
- School of Chemistry, University of St. Andrews, Scotland Fife, St. Andrews, KY16 9ST, UK
| | - Kalliopi Kousi
- School of Chemistry & Chemical Engineering, University of Surrey, Guildford, Surrey, GU2 7XH, UK
| | - Ian S Metcalfe
- School of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - John T S Irvine
- School of Chemistry, University of St. Andrews, Scotland Fife, St. Andrews, KY16 9ST, UK
| | - Paul Maguire
- School of Engineering, Ulster University, Belfast, BT37 0QB, UK
| | | | - Davide Mariotti
- Department of Design, Manufacturing & Engineering Management, University of Strathclyde, Glasgow, G1 1XJ, UK
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6
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Yun SY, Lee S, Jin X, Soon A, Hwang S. Ammonolysis-Driven Exsolution of Ru Nanoparticle Embedded in Conductive Metal Nitride Matrix to Boost Electrocatalyst Activity. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2309819. [PMID: 38582505 PMCID: PMC11200002 DOI: 10.1002/advs.202309819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/13/2024] [Indexed: 04/08/2024]
Abstract
Exsolution is an effective method for synthesizing robust nanostructured metal-based functional materials. However, no studies have investigated the exsolution of metal nanoparticles into metal nitride substrates. In this study, a versatile nitridation-driven exsolution method is developed for embedding catalytically active metal nanoparticles in conductive metal nitride substrates via the ammonolysis of multimetallic oxides. Using this approach, Ti1-xRuxO2 nanowires are phase-transformed into holey TiN nanotubes embedded with exsolved Ru nanoparticles. These Ru-exsolved holey TiN nanotubes exhibit outstanding electrocatalytic activity for the hydrogen evolution reaction with excellent durability, which is significantly higher than that of Ru-deposited TiN nanotubes. The enhanced stability of the Ru-exsolved TiN nanotubes can be attributed to the Ru nanoparticles embedded in the robust metal nitride matrix and the formation of interfacial Ti3+─N─Ru4+ bonds. Density functional theory calculations reveal that the exsolved Ru nanoparticles have a lower d-band center position and optimized hydrogen affinity than deposited Ru nanoparticles, indicating the superior electrocatalyst performance of the former. In situ Raman spectroscopic analysis reveals that the electron transfer from TiN to Ru nanoparticles is enhanced during the electrocatalytic process. The proposed approach opens a new avenue for stabilizing diverse metal nanostructures in many conductive matrices like metal phosphides and chalcogenides.
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Affiliation(s)
- So Yeon Yun
- Department of Materials Science and EngineeringCollege of EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Sangseob Lee
- Center for Artificial Synesthesia Materials DiscoveryDepartment of Materials Science and EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Xiaoyan Jin
- Department of Applied ChemistryUniversity of SeoulSeoul02504Republic of Korea
| | - Aloysius Soon
- Center for Artificial Synesthesia Materials DiscoveryDepartment of Materials Science and EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Seong‐Ju Hwang
- Department of Materials Science and EngineeringCollege of EngineeringYonsei UniversitySeoul03722Republic of Korea
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7
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Martín-Espejo JL, Merkouri LP, Gándara-Loe J, Odriozola JA, Reina TR, Pastor-Pérez L. Nickel-based cerium zirconate inorganic complex structures for CO 2 valorisation via dry reforming of methane. J Environ Sci (China) 2024; 140:12-23. [PMID: 38331494 DOI: 10.1016/j.jes.2023.01.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/23/2022] [Accepted: 01/16/2023] [Indexed: 02/10/2024]
Abstract
The increasing anthropogenic emissions of greenhouse gases (GHG) is encouraging extensive research in CO2 utilisation. Dry reforming of methane (DRM) depicts a viable strategy to convert both CO2 and CH4 into syngas, a worthwhile chemical intermediate. Among the different active phases for DRM, the use of nickel as catalyst is economically favourable, but typically deactivates due to sintering and carbon deposition. The stabilisation of Ni at different loadings in cerium zirconate inorganic complex structures is investigated in this work as strategy to develop robust Ni-based DRM catalysts. XRD and TPR-H2 analyses confirmed the existence of different phases according to the Ni loading in these materials. Besides, superficial Ni is observed as well as the existence of a CeNiO3 perovskite structure. The catalytic activity was tested, proving that 10 wt.% Ni loading is the optimum which maximises conversion. This catalyst was also tested in long-term stability experiments at 600 and 800°C in order to study the potential deactivation issues at two different temperatures. At 600°C, carbon formation is the main cause of catalytic deactivation, whereas a robust stability is shown at 800°C, observing no sintering of the active phase evidencing the success of this strategy rendering a new family of economically appealing CO2 and biogas mixtures upgrading catalysts.
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Affiliation(s)
- Juan Luis Martín-Espejo
- Department of Inorganic Chemistry and Material Sciences Institute of Seville, University of Seville-CSIC, Seville 41092, Spain
| | | | - Jesús Gándara-Loe
- Department of Inorganic Chemistry and Material Sciences Institute of Seville, University of Seville-CSIC, Seville 41092, Spain
| | - José Antonio Odriozola
- Department of Inorganic Chemistry and Material Sciences Institute of Seville, University of Seville-CSIC, Seville 41092, Spain; Department of Chemical and Process Engineering, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - Tomas Ramirez Reina
- Department of Inorganic Chemistry and Material Sciences Institute of Seville, University of Seville-CSIC, Seville 41092, Spain.
| | - Laura Pastor-Pérez
- Department of Inorganic Chemistry and Material Sciences Institute of Seville, University of Seville-CSIC, Seville 41092, Spain; Department of Chemical and Process Engineering, University of Surrey, Guildford GU2 7XH, United Kingdom.
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8
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Wang X, Santos-Carballal D, de Leeuw NH. Cation doping and oxygen vacancies in the orthorhombic FeNbO4 material for solid oxide fuel cell applications: A density functional theory study. J Chem Phys 2024; 160:154713. [PMID: 38634493 DOI: 10.1063/5.0192749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 03/22/2024] [Indexed: 04/19/2024] Open
Abstract
The orthorhombic phase of FeNbO4, a promising anode material for solid oxide fuel cells (SOFCs), exhibits good catalytic activity toward hydrogen oxidation. However, the low electronic conductivity of the material specifically in the pure structure without defects or dopants limits its practical applications as an SOFC anode. In this study, we have employed density functional theory (DFT + U) calculations to explore the bulk and electronic properties of two types of doped structures, Fe0.9375A0.0625NbO4 and FeNb0.9375B0.0625O4 (A, B = Ti, V, Cr, Mn, Co, Ni) and the oxygen-deficient structures Fe0.9375A0.0625NbO3.9375 and FeNb0.9375B0.0625O3.9375, where the dopant is positioned in the first nearest neighbor site to the oxygen vacancy. Our DFT simulations have revealed that doping in the Fe sites is energetically favorable compared to doping in the Nb site, resulting in significant volume expansion. The doping process generally requires less energy when the O-vacancy is surrounded by one Fe and two Nb ions. The simulated projected density of states of the oxygen-deficient structures indicates that doping in the Fe site, particularly with Ti and V, considerably narrows the bandgap to ∼0.5 eV, whereas doping with Co at the Nb sites generates acceptor levels close to 0 eV. Both doping schemes, therefore, enhance electron conduction during SOFC operation.
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Affiliation(s)
- Xingyu Wang
- School of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom
| | | | - Nora H de Leeuw
- School of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom
- Department of Earth Sciences, Utrecht University, 3584 CB Utrecht, The Netherlands
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9
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Weber ML, Šmíd B, Breuer U, Rose MA, Menzler NH, Dittmann R, Waser R, Guillon O, Gunkel F, Lenser C. Space charge governs the kinetics of metal exsolution. NATURE MATERIALS 2024; 23:406-413. [PMID: 38168807 PMCID: PMC10917682 DOI: 10.1038/s41563-023-01743-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 10/30/2023] [Indexed: 01/05/2024]
Abstract
Nanostructured composite electrode materials play a major role in the fields of catalysis and electrochemistry. The self-assembly of metallic nanoparticles on oxide supports via metal exsolution relies on the transport of reducible dopants towards the perovskite surface to provide accessible catalytic centres at the solid-gas interface. At surfaces and interfaces, however, strong electrostatic gradients and space charges typically control the properties of oxides. Here we reveal that the nature of the surface-dopant interaction is the main determining factor for the exsolution kinetics of nickel in SrTi0.9Nb0.05Ni0.05O3-δ. The electrostatic interaction of dopants with surface space charge regions forming upon thermal oxidation results in strong surface passivation, which manifests in a retarded exsolution response. We furthermore demonstrate the controllability of the exsolution response via engineering of the perovskite surface chemistry. Our findings indicate that tailoring the electrostatic gradients at the perovskite surface is an essential step to improve exsolution-type materials in catalytic converters.
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Affiliation(s)
- Moritz L Weber
- Peter Gruenberg Institute - Electronic Materials (PGI-7), Forschungszentrum Juelich GmbH, Juelich, Germany.
- Institute of Energy and Climate Research - Materials Synthesis and Processing (IEK-1), Forschungszentrum Juelich GmbH, Juelich, Germany.
- Juelich-Aachen Research Alliance (JARA-FIT), Juelich, Germany.
- Institute of Mineral Engineering (GHI), RWTH Aachen University, Aachen, Germany.
| | - Břetislav Šmíd
- Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| | - Uwe Breuer
- Central Institute for Engineering, Electronics and Analytics (ZEA-3), Forschungszentrum Juelich GmbH, Juelich, Germany
| | - Marc-André Rose
- Peter Gruenberg Institute - Electronic Materials (PGI-7), Forschungszentrum Juelich GmbH, Juelich, Germany
- Juelich-Aachen Research Alliance (JARA-FIT), Juelich, Germany
- Institute for Electronic Materials (IWE 2), RWTH Aachen University, Aachen, Germany
| | - Norbert H Menzler
- Institute of Energy and Climate Research - Materials Synthesis and Processing (IEK-1), Forschungszentrum Juelich GmbH, Juelich, Germany
- Institute of Mineral Engineering (GHI), RWTH Aachen University, Aachen, Germany
| | - Regina Dittmann
- Peter Gruenberg Institute - Electronic Materials (PGI-7), Forschungszentrum Juelich GmbH, Juelich, Germany
- Juelich-Aachen Research Alliance (JARA-FIT), Juelich, Germany
| | - Rainer Waser
- Peter Gruenberg Institute - Electronic Materials (PGI-7), Forschungszentrum Juelich GmbH, Juelich, Germany
- Juelich-Aachen Research Alliance (JARA-FIT), Juelich, Germany
- Institute for Electronic Materials (IWE 2), RWTH Aachen University, Aachen, Germany
| | - Olivier Guillon
- Institute of Energy and Climate Research - Materials Synthesis and Processing (IEK-1), Forschungszentrum Juelich GmbH, Juelich, Germany
- Institute of Mineral Engineering (GHI), RWTH Aachen University, Aachen, Germany
- Juelich-Aachen Research Alliance (JARA-Energy), Juelich, Germany
| | - Felix Gunkel
- Peter Gruenberg Institute - Electronic Materials (PGI-7), Forschungszentrum Juelich GmbH, Juelich, Germany.
- Juelich-Aachen Research Alliance (JARA-FIT), Juelich, Germany.
| | - Christian Lenser
- Institute of Energy and Climate Research - Materials Synthesis and Processing (IEK-1), Forschungszentrum Juelich GmbH, Juelich, Germany.
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10
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Zhu S, Fan J, Li Z, Wu J, Xiao M, Du P, Wang X, Jia L. Metal exsolution from perovskite-based anodes in solid oxide fuel cells. Chem Commun (Camb) 2024; 60:1062-1071. [PMID: 38167745 DOI: 10.1039/d3cc05688k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Solid oxide fuel cells (SOFCs) are highly efficient and environmentally friendly devices for converting fuel into electrical energy. In this regard, metal nanoparticles (NPs) loaded onto the anode oxide play a crucial role due to their exceptional catalytic activity. NPs synthesized through exsolution exhibit excellent dispersion and stability, garnering significant attention for comprehending the exsolution process mechanism and consequently improving synthesis effectiveness. This review presents recent advancements in the exsolution process, focusing on the influence of oxygen vacancies, A-site defects, lattice strain, and phase transformation on the variation of the octahedral crystal field in perovskites. Moreover, we offer insights into future research directions to further enhance our understanding of the mechanism and achieve significant exsolution of NPs on perovskites.
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Affiliation(s)
- Shasha Zhu
- School of Materials Science and Engineering, Wuhan Textile University, Wuhan 430200, P. R. China.
| | - Junde Fan
- Yueyang Yumeikang Biotechnology Co., Ltd., Yueyang, 414100, P. R. China
| | - Zongbao Li
- School of Materials Science and Engineering, Wuhan Textile University, Wuhan 430200, P. R. China.
| | - Jun Wu
- School of Materials Science and Engineering, Wuhan Textile University, Wuhan 430200, P. R. China.
| | - Mengqin Xiao
- School of Materials Science and Engineering, Wuhan Textile University, Wuhan 430200, P. R. China.
| | - Pengxuan Du
- School of Materials Science and Engineering, Wuhan Textile University, Wuhan 430200, P. R. China.
| | - Xin Wang
- School of Materials Science and Engineering, Wuhan Textile University, Wuhan 430200, P. R. China.
| | - Lichao Jia
- School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
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11
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Hursán D, Timoshenko J, Ortega E, Jeon HS, Rüscher M, Herzog A, Rettenmaier C, Chee SW, Martini A, Koshy D, Roldán Cuenya B. Reversible Structural Evolution of Metal-Nitrogen-Doped Carbon Catalysts During CO 2 Electroreduction: An Operando X-ray Absorption Spectroscopy Study. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2307809. [PMID: 37994692 DOI: 10.1002/adma.202307809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 11/09/2023] [Indexed: 11/24/2023]
Abstract
Electrochemical CO2 reduction (CO2 RR) is a rising technology, aiming to reduce the energy sector dependence on fossil fuels and to produce carbon-neutral raw materials. Metal-nitrogen-doped carbons (M-N-C) are emerging, cost-effective catalysts for this reaction; however, their long-term stability is a major issue. To overcome this, understanding their structural evolution is crucial, requiring systematic in-depth operando studies. Here a series of M-N-C catalysts (M = Fe, Sn, Cu, Co, Ni, Zn) is investigated using operando X-ray absorption spectroscopy. It is found that the Fe-N-C and Sn-N-C are prone to oxide clusters formation even before CO2 RR. In contrast, the respective metal cations are singly dispersed in the as-prepared Cu-N-C, Co-N-C, Ni-N-C, and (Zn)-N-C. During CO2 RR, metallic clusters/nanoparticles reversibly formed in all catalysts, except for the Ni-N-C. This phenomenon, previously observed only in Cu-N-C, thus is ubiquitous in M-N-C catalysts. The competition between M-O and M-N interactions is an important factor determining the mobility of metal species in M-N-C. Specifically, the strong interaction between the Ni centers and the N-functional groups of the carbon support results in higher stability of the Ni single-sites, leading to the excellent performance of Ni-N-C in the CO2 to CO conversion, in comparison to other transition metals.
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Affiliation(s)
- Dorottya Hursán
- Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
| | - Janis Timoshenko
- Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
| | - Eduardo Ortega
- Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
| | - Hyo Sang Jeon
- Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
| | - Martina Rüscher
- Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
| | - Antonia Herzog
- Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
| | - Clara Rettenmaier
- Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
| | - See Wee Chee
- Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
| | - Andrea Martini
- Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
| | - David Koshy
- Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
| | - Beatriz Roldán Cuenya
- Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
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12
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López-García A, Domínguez-Saldaña A, Carrillo AJ, Navarrete L, Valls MI, García-Baños B, Plaza-Gonzalez PJ, Catala-Civera JM, Serra JM. Microwave-Driven Exsolution of Ni Nanoparticles in A-Site Deficient Perovskites. ACS NANO 2023; 17:23955-23964. [PMID: 37974412 PMCID: PMC10722607 DOI: 10.1021/acsnano.3c08534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 11/08/2023] [Accepted: 11/13/2023] [Indexed: 11/19/2023]
Abstract
Exsolution has emerged as a promising method for generating metallic nanoparticles, whose robustness and stability outperform those of more conventional deposition methods, such as impregnation. In general, exsolution involves the migration of transition metal cations, typically perovskites, under reducing conditions, leading to the nucleation of well-anchored metallic nanoparticles on the oxide surface with particular properties. There is growing interest in exploring alternative methods for exsolution that do not rely on high-temperature reduction via hydrogen. For example, utilizing electrochemical potentials or plasma technologies has shown promising results in terms of faster exsolution, leading to better dispersion of nanoparticles under milder conditions. To avoid limitations in scaling up exhibited by electrochemical cells and plasma-generation devices, we proposed a method based on pulsed microwave (MW) radiation to drive the exsolution of metallic nanoparticles. Here, we demonstrate the H2-free MW-driven exsolution of Ni nanoparticles from lanthanum strontium titanates, characterizing the mechanism that provides control over nanoparticle size and dispersion and enhanced catalytic activity and stability for CO2 hydrogenation. The presented method will enable the production of metallic nanoparticles with a high potential for scalability, requiring short exposure times and low temperatures.
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Affiliation(s)
- Andrés López-García
- Instituto
de Tecnología Química, Universitat
Politècnica de València-Consejo Superior de Investigaciones
Científicas, Av. dels Tarongers, 46022 València, Spain
| | - Aitor Domínguez-Saldaña
- Instituto
de Tecnología Química, Universitat
Politècnica de València-Consejo Superior de Investigaciones
Científicas, Av. dels Tarongers, 46022 València, Spain
| | - Alfonso J. Carrillo
- Instituto
de Tecnología Química, Universitat
Politècnica de València-Consejo Superior de Investigaciones
Científicas, Av. dels Tarongers, 46022 València, Spain
| | - Laura Navarrete
- Instituto
de Tecnología Química, Universitat
Politècnica de València-Consejo Superior de Investigaciones
Científicas, Av. dels Tarongers, 46022 València, Spain
| | - Maria I. Valls
- Instituto
de Tecnología Química, Universitat
Politècnica de València-Consejo Superior de Investigaciones
Científicas, Av. dels Tarongers, 46022 València, Spain
| | - Beatriz García-Baños
- Instituto
ITACA, Universitat Politècnica de
València, Camí de Vera, 46022 València, Spain
| | | | | | - José Manuel Serra
- Instituto
de Tecnología Química, Universitat
Politècnica de València-Consejo Superior de Investigaciones
Científicas, Av. dels Tarongers, 46022 València, Spain
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13
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Kim YH, Jeong H, Won BR, Jeon H, Park CH, Park D, Kim Y, Lee S, Myung JH. Nanoparticle Exsolution on Perovskite Oxides: Insights into Mechanism, Characteristics and Novel Strategies. NANO-MICRO LETTERS 2023; 16:33. [PMID: 38015283 PMCID: PMC10684483 DOI: 10.1007/s40820-023-01258-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 10/19/2023] [Indexed: 11/29/2023]
Abstract
Supported nanoparticles have attracted considerable attention as a promising catalyst for achieving unique properties in numerous applications, including fuel cells, chemical conversion, and batteries. Nanocatalysts demonstrate high activity by expanding the number of active sites, but they also intensify deactivation issues, such as agglomeration and poisoning, simultaneously. Exsolution for bottom-up synthesis of supported nanoparticles has emerged as a breakthrough technique to overcome limitations associated with conventional nanomaterials. Nanoparticles are uniformly exsolved from perovskite oxide supports and socketed into the oxide support by a one-step reduction process. Their uniformity and stability, resulting from the socketed structure, play a crucial role in the development of novel nanocatalysts. Recently, tremendous research efforts have been dedicated to further controlling exsolution particles. To effectively address exsolution at a more precise level, understanding the underlying mechanism is essential. This review presents a comprehensive overview of the exsolution mechanism, with a focus on its driving force, processes, properties, and synergetic strategies, as well as new pathways for optimizing nanocatalysts in diverse applications.
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Affiliation(s)
- Yo Han Kim
- Department of Materials Science and Engineering, Incheon National University, Incheon, 22012, Republic of Korea
| | - Hyeongwon Jeong
- Department of Materials Science and Engineering, Incheon National University, Incheon, 22012, Republic of Korea
| | - Bo-Ram Won
- Department of Materials Science and Engineering, Incheon National University, Incheon, 22012, Republic of Korea
| | - Hyejin Jeon
- Department of Materials Science and Engineering, Incheon National University, Incheon, 22012, Republic of Korea
| | - Chan-Ho Park
- Department of Materials Science and Engineering, Incheon National University, Incheon, 22012, Republic of Korea
| | - Dayoung Park
- Department of Materials Science and Engineering, Incheon National University, Incheon, 22012, Republic of Korea
| | - Yeeun Kim
- Department of Materials Science and Engineering, Incheon National University, Incheon, 22012, Republic of Korea
| | - Somi Lee
- Department of Materials Science and Engineering, Incheon National University, Incheon, 22012, Republic of Korea
| | - Jae-Ha Myung
- Department of Materials Science and Engineering, Incheon National University, Incheon, 22012, Republic of Korea.
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14
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Najimu M, Jo S, Gilliard-AbdulAziz KL. Co-Exsolution of Ni-Based Alloy Catalysts for the Valorization of Carbon Dioxide and Methane. Acc Chem Res 2023; 56:3132-3141. [PMID: 37939260 DOI: 10.1021/acs.accounts.3c00404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
ConspectusThe reversible coexsolution mechanism of perovskite oxides is emerging as an alternative method for synthesizing alloy catalyst nanoparticles. Co-exsolution is a partial decomposition process where multiple B cations diffuse from the bulk of a solid precursor and nucleate on the surface. The unique properties of exsolved alloy catalysts, including improved dispersion, thermal stability, and compositional malleability, make them particularly useful for converting CO2 into chemical commodities and fuels. However, the coexsolution of alloys is still in development, and fundamental insights into the alloying mechanism, formation of nanoparticles, and defect chemistry are needed.This Account examines the solid-state chemistry of perovskite oxide precursors and reaction parameters that can be altered to control the assembly or exsolution of Ni-based alloys. The characteristics of bulk perovskite oxide precursors heavily influence the exsolved alloy catalyst nanoparticle assembly, growth, and composition. Inherent defects, such as oxygen vacancies and grain boundaries, primarily facilitate the transport of catalytic B-cation dopants from the bulk to the surface. An example of how bulk defects can affect the properties of Ni-based alloy catalysts is demonstrated through the formation of NiFe from La(Fe, Ni)O3. The A/B cation ratio plays a significant role in determining the size and composition of NiFe nanoparticles, which directly impacts their catalytic performance. Using in situ X-ray absorption spectroscopy (in situ XAS), the dynamic behavior of exsolved NiFe nanoparticles can be observed in different reaction environments (oxidation, reduction, and dry reforming of methane) by tracking the oxidation state and local environment of the Ni K-edge and Fe K-edge using X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS), respectively. Time-resolved experiments with in situ XAS showed that NiFe nanoparticle growth starts at ∼280 °C and transforms from predominantly Ni to NiFe at higher reduction times and temperatures.The challenges of exsolution of higher-order Ni-based alloys, such as 3(NiFeCo), 4(NiCoCuPd), and 5(NiFeCoCuPd) element nanoparticles, to improve the catalyst properties are discussed. The size, concentration, and reducibility of the dopant cation can alter the exsolution kinetics, alloy nanoparticle growth dynamics, and catalyst performance. The size and composition of exsolved Ni-based alloys affect the effectiveness of catalysts in the dry reforming of methane. Large NiFeCo nanoparticles separated from Pd and Cu can lead to catalyst deactivation, but using a complex alloy with smaller NiFeCoPdCu nanoparticles results in a stable performance. The use of in situ XANES reveals how the dry reforming of methane reaction conditions can induce changes in the NiFe with the rapid redissolution of Fe back into the lattice.The dynamicity of the exsolved Ni-based alloy nanoparticles and implications for their regeneration after aging or exposure to waste gas contaminants are discussed. Finally, we summarize the Account and provide promising future directions.
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Affiliation(s)
- Musa Najimu
- Department of Chemical and Environmental Engineering, University of California-Riverside, Riverside, California 92521, United States
| | - Seongbin Jo
- Department of Chemical and Environmental Engineering, University of California-Riverside, Riverside, California 92521, United States
| | - Kandis Leslie Gilliard-AbdulAziz
- Department of Chemical and Environmental Engineering, University of California-Riverside, Riverside, California 92521, United States
- Department of Material Science and Engineering, University of California-Riverside, Riverside, California 92521, United States
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15
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Drosou C, Nikolaraki E, Georgakopoulou T, Fanourgiakis S, Zaspalis VT, Yentekakis IV. Methane Catalytic Combustion under Lean Conditions over Pristine and Ir-Loaded La 1-xSr xMnO 3 Perovskites: Efficiency, Hysteresis, and Time-on-Stream and Thermal Aging Stabilities. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2271. [PMID: 37570587 PMCID: PMC10420673 DOI: 10.3390/nano13152271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 08/02/2023] [Accepted: 08/03/2023] [Indexed: 08/13/2023]
Abstract
The increasing use of natural gas as an efficient, reliable, affordable, and cleaner energy source, compared with other fossil fuels, has brought the catalytic CH4 complete oxidation reaction into the spotlight as a simple and economic way to control the amount of unconverted methane escaping into the atmosphere. CH4 emissions are a major contributor to the 'greenhouse effect', and therefore, they need to be effectively reduced. Catalytic CH4 oxidation is a promising method that can be used for this purpose. Detailed studies of the activity, oxidative thermal aging, and the time-on-stream (TOS) stability of pristine La1-xSrxMnO3 perovskites (LSXM; X = % substitution of La with Sr = 0, 30, 50 and 70%) and iridium-loaded Ir/La1-xSrxMnO3 (Ir/LSXM) perovskite catalysts were conducted in a temperature range of 400-970 °C to achieve complete methane oxidation under excess oxygen (lean) conditions. The effect of X on the properties of the perovskites, and thus, their catalytic performance during heating/cooling cycles, was studied using samples that were subjected to various pretreatment conditions in order to gain an in-depth understanding of the structure-activity/stability correlations. Large (up to ca. 300 °C in terms of T50) inverted volcano-type differences in catalytic activity were found as a function of X, with the most active catalysts being those where X = 0%, and the least active were those where X = 50%. Inverse hysteresis phenomena (steady-state rate multiplicities) were revealed in heating/cooling cycles under reaction conditions, the occurrence of which was found to depend strongly on the employed catalyst pre-treatment (pre-reduction or pre-oxidation), while their shape and the loop amplitude were found to depend on X and the presence of Ir. All findings were consistently interpreted, which involved a two-term mechanistic model that utilized the synergy of Eley-Rideal and Mars-van Krevelen kinetics.
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Affiliation(s)
- Catherine Drosou
- Laboratory of Physical Chemistry and Chemical Processes, School of Chemical and Environmental Engineering, Technical University of Crete, 731 00 Chania, Crete, Greece; (E.N.); (T.G.); (S.F.)
| | - Ersi Nikolaraki
- Laboratory of Physical Chemistry and Chemical Processes, School of Chemical and Environmental Engineering, Technical University of Crete, 731 00 Chania, Crete, Greece; (E.N.); (T.G.); (S.F.)
| | - Theodora Georgakopoulou
- Laboratory of Physical Chemistry and Chemical Processes, School of Chemical and Environmental Engineering, Technical University of Crete, 731 00 Chania, Crete, Greece; (E.N.); (T.G.); (S.F.)
| | - Sotiris Fanourgiakis
- Laboratory of Physical Chemistry and Chemical Processes, School of Chemical and Environmental Engineering, Technical University of Crete, 731 00 Chania, Crete, Greece; (E.N.); (T.G.); (S.F.)
| | - Vassilios T. Zaspalis
- Department of Chemical Engineering, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece;
- Chemical Process and Energy Resources Institute, Center for Research and Technology Hellas (CPERI/CERTH), 570 01 Thermi, Thessaloniki, Greece
| | - Ioannis V. Yentekakis
- Laboratory of Physical Chemistry and Chemical Processes, School of Chemical and Environmental Engineering, Technical University of Crete, 731 00 Chania, Crete, Greece; (E.N.); (T.G.); (S.F.)
- Institute of GeoEnergy, Foundation for Research and Technology-Hellas (FORTH/IG), 731 00 Chania, Greece
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16
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Lu Y, Huang Y, Xu Z, Yang K, Bao W, Lu Q. Quantifying Electrochemical Driving Force for Exsolution in Perovskite Oxides by Designing Graded Oxygen Chemical Potential. ACS NANO 2023. [PMID: 37390393 DOI: 10.1021/acsnano.3c04008] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/02/2023]
Abstract
Metal nanoparticles exsolved and anchored at the parent perovskite oxide surfaces can greatly enhance the activity and antisintering stability for high-temperature (electro-) chemical catalytic reactions. While exsolution of nanoparticles triggered by using conventional high-temperature thermal reduction suffers from slow kinetics, using an electrochemical driving force can promote the exsolution rate. However, a quantitative correlation between the applied electrochemical driving force and the spatial density of exsolved nanoparticles remains unknown. In this work, we use a specially designed electrochemical device to induce a spatially graded voltage in a La0.43Ca0.37Ti0.94Ni0.06O3-δ electrode, in order to systematically investigate the effect of electrochemical switching on exsolution. With increasing driving force, which leads to decreasing oxygen chemical potential, the density of nanoparticles was observed to increase dramatically, while the average particle size remained roughly constant. We further identified oxygen vacancy pairs or clusters as the preferential nucleation sites for exsolution. Our work provided a high-throughput platform for the systematic study of exsolution of perovskite oxides targeted for fuel electrode materials with improved electrocatalytic performance and stability.
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Affiliation(s)
- Ying Lu
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang 310030, China
- School of Engineering, Westlake University, Hangzhou, Zhejiang 310024, China
| | - Yiwei Huang
- School of Engineering, Westlake University, Hangzhou, Zhejiang 310024, China
| | - Zihan Xu
- School of Engineering, Westlake University, Hangzhou, Zhejiang 310024, China
| | - Kaichuang Yang
- School of Engineering, Westlake University, Hangzhou, Zhejiang 310024, China
| | - Weichao Bao
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China
| | - Qiyang Lu
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang 310030, China
- School of Engineering, Westlake University, Hangzhou, Zhejiang 310024, China
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17
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O'Leary W, Giordano L, Park J, Nonnenmann SS, Shao-Horn Y, Rupp JLM. Influence of Sr-Site Deficiency, Ca/Ba/La Doping on the Exsolution of Ni from SrTiO 3. J Am Chem Soc 2023. [PMID: 37318138 DOI: 10.1021/jacs.2c12011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Cermet catalysts formed via exsolution of metal nanoparticles from perovskites promise to perform better in electro- and thermochemical applications than those synthesized by conventional wet-chemical approaches. However, a shortage of robust material design principles still stands in the way of widespread commercial adoption of exsolution. Working with Ni-doped SrTiO3 solid solutions, we investigated how the introduction of Sr deficiency as well as Ca, Ba, and La doping on the Sr site changed the size and surface density of exsolved Ni nanoparticles. We carried out exsolution on 11 different compositions under fixed conditions. We elucidated the effect of A-site defect size/valence on nanoparticle density and size as well as the effect of composition on nanoparticle immersion and ceramic microstructure. Based on our experimental results, we developed a model that quantitatively predicted a composition's exsolution properties using density functional theory calculations. The model and calculations provide insights into the exsolution mechanism and can be used to find new compositions with high exsolution nanoparticle density.
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Affiliation(s)
- Willis O'Leary
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Livia Giordano
- Department of Materials Science, University of Milano-Bicocca, Milan 20125, Italy
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Jieun Park
- Department of Mechanical and Industrial Engineering, University of Massachusetts─Amherst, Amherst, Massachusetts 01002, United States
| | - Stephen S Nonnenmann
- Department of Mechanical and Industrial Engineering, University of Massachusetts─Amherst, Amherst, Massachusetts 01002, United States
| | - Yang Shao-Horn
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Jennifer L M Rupp
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Department of Chemistry, Technical University of Munich, Garching 85748, Germany
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18
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Mishchenko DD, Vinokurov ZS, Afonasenko TN, Saraev AA, Simonov MN, Gerasimov EY, Bulavchenko OA. Insights into the Contribution of Oxidation-Reduction Pretreatment for Mn 0.2Zr 0.8O 2-δ Catalyst of CO Oxidation Reaction. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16093508. [PMID: 37176389 PMCID: PMC10179886 DOI: 10.3390/ma16093508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 04/22/2023] [Accepted: 04/28/2023] [Indexed: 05/15/2023]
Abstract
A Mn0.2Zr0.8O2-δ mixed oxide catalyst was synthesized via the co-precipitation method and studied in a CO oxidation reaction after different redox pretreatments. The surface and structural properties of the catalyst were studied before and after the pretreatment using XRD, XANES, XPS, and TEM techniques. Operando XRD was used to monitor the changes in the crystal structure under pretreatment and reaction conditions. The catalytic properties were found to depend on the activation procedure: reducing the CO atmosphere at 400-600 °C and the reaction mixture (O2 excess) or oxidative O2 atmosphere at 250-400 °C. A maximum catalytic effect characterized by decreasing T50 from 193 to 171 °C was observed after a reduction at 400 °C and further oxidation in the CO/O2 reaction mixture was observed at 250 °C. Operando XRD showed a reversible reduction-oxidation of Mn cations in the volume of Mn0.2Zr0.8O2-δ solid solution. XPS and TEM detected the segregation of manganese cations on the surface of the mixed oxide. TEM showed that Mn-rich regions have a structure of MnO2. The pretreatment caused the partial decomposition of the Mn0.2Zr0.8O2-δ solid solution and the formation of surface Mn-rich areas that are active in catalytic CO oxidation. In this work it was shown that the introduction of oxidation-reduction pretreatment cycles leads to an increase in catalytic activity due to changes in the origin of active states.
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Affiliation(s)
- Denis D Mishchenko
- Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave., 5, Novosibirsk 630090, Russia
- Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis SB RAS, Nikol'skiy Prospekt 1, Kol'tsovo 630559, Russia
| | - Zakhar S Vinokurov
- Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave., 5, Novosibirsk 630090, Russia
- Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis SB RAS, Nikol'skiy Prospekt 1, Kol'tsovo 630559, Russia
| | - Tatyana N Afonasenko
- Center of New Chemical Technologies, Boreskov Institute of Catalysis SB RAS, Neftezavodskaya, 54, Omsk 644040, Russia
| | - Andrey A Saraev
- Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave., 5, Novosibirsk 630090, Russia
- Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis SB RAS, Nikol'skiy Prospekt 1, Kol'tsovo 630559, Russia
| | - Mikhail N Simonov
- Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave., 5, Novosibirsk 630090, Russia
| | - Evgeny Yu Gerasimov
- Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave., 5, Novosibirsk 630090, Russia
| | - Olga A Bulavchenko
- Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave., 5, Novosibirsk 630090, Russia
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19
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Kim YH, Jeong H, Won BR, Myung JH. Exsolution Modeling and Control to Improve the Catalytic Activity of Nanostructured Electrodes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2208984. [PMID: 36691762 DOI: 10.1002/adma.202208984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 01/17/2023] [Indexed: 06/17/2023]
Abstract
In situ exsolution for nanoscale electrode design has attracted considerable attention because of its promising activity and high stability. However, fundamental research on the mechanisms underlying particle growth remains insufficient. Herein, cation-diffusion-determined exsolution is presented using an analytical model based on classical nucleation and diffusion. In the designed perovskite system, the exsolution trend for particle growth is consistent with this diffusion model, which strongly depends on the initial cation concentration and reduction conditions. Based on the experimental and theoretical results, a highly Ni-doped anode and an electrochemical switching technique are employed to promote exsolution and overcome growth limitations. The optimal cell exhibits an outstanding maximum power density of 1.7 W cm-2 at 900 °C and shows no evident degradation when operating at 800 °C for 240 h under wet H2 . This study provides crucial insights into the developing and tuning of heterogeneous catalysts for energy-conversion applications.
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Affiliation(s)
- Yo Han Kim
- Department of Materials Science and Engineering, Incheon National University, Incheon, 22012, Republic of Korea
| | - Hyeongwon Jeong
- Department of Materials Science and Engineering, Incheon National University, Incheon, 22012, Republic of Korea
| | - Bo-Ram Won
- Department of Materials Science and Engineering, Incheon National University, Incheon, 22012, Republic of Korea
| | - Jae-Ha Myung
- Department of Materials Science and Engineering, Incheon National University, Incheon, 22012, Republic of Korea
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20
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Shah S, Hong J, Cruz L, Wasantwisut S, Bare SR, Gilliard-AbdulAziz KL. Dynamic Tracking of NiFe Smart Catalysts using In Situ X-Ray Absorption Spectroscopy for the Dry Methane Reforming Reaction. ACS Catal 2023. [DOI: 10.1021/acscatal.2c05572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
Affiliation(s)
- Soham Shah
- Department of Chemical and Environmental Engineering, Bourns College of Engineering, University of California Riverside, 446 Winston Chung Hall, 900 University Ave, Riverside, California 92507, United States
| | - Jiyun Hong
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Luz Cruz
- Department of Material Science and Engineering, Bourns College of Engineering, University of California Riverside, Material Science, and Engineering Building, 900 University Ave, Riverside, California 92507, United States
| | - Somchate Wasantwisut
- Department of Chemical and Environmental Engineering, Bourns College of Engineering, University of California Riverside, 446 Winston Chung Hall, 900 University Ave, Riverside, California 92507, United States
| | - Simon R. Bare
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Kandis Leslie Gilliard-AbdulAziz
- Department of Chemical and Environmental Engineering, Bourns College of Engineering, University of California Riverside, 446 Winston Chung Hall, 900 University Ave, Riverside, California 92507, United States
- Department of Material Science and Engineering, Bourns College of Engineering, University of California Riverside, Material Science, and Engineering Building, 900 University Ave, Riverside, California 92507, United States
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21
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Luong J, Wang X, Tsung A, Humphrey N, Guo H, Lam BX, Mallikarjun Sharada S, Bowman WJ. Nanoscale Iron Redistribution during Thermochemical Decomposition of CaTi 1-x Fe x O 3-δ Alters the Electrical Transport Pathway: Implications for Oxygen-Transport Membranes, Electrocatalysis, and Photocatalysis. ACS APPLIED NANO MATERIALS 2023; 6:1620-1630. [PMID: 36818540 PMCID: PMC9926871 DOI: 10.1021/acsanm.2c04537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 01/06/2023] [Indexed: 06/18/2023]
Abstract
Potential applications of the earth-abundant, low-cost, and non-critical perovskite CaTi1-x Fe x O3-δ in electrocatalysis, photocatalysis, and oxygen-transport membranes have motivated research to tune its chemical composition and morphology. However, investigations on the decomposition mechanism(s) of CaTi1-x Fe x O3-δ under thermochemically reducing conditions are limited, and direct evidence of the nano- and atomic-level decomposition process is not available in the literature. In this work, the phase evolution of CaTi1-x Fe x O3-δ (x = 0-0.4) was investigated in a H2-containing atmosphere after heat treatments up to 600 °C. The results show that CaTi1-x Fe x O3-δ maintained a stable perovskite phase at low Fe contents while exhibiting a phase decomposition to Fe/Fe oxide nanoparticles as the Fe content increases. In CaTi0.7Fe0.3O3-δ and CaTi0.6Fe0.4O3-δ, the phase evolution to Fe/Fe oxide was greatly influenced by the temperature: Only temperatures of 300 °C and greater facilitated phase evolution. Fully coherent Fe-rich and Fe-depleted perovskite nanodomains were observed directly by atomic-resolution scanning transmission electron microscopy. Prior evidence for such nanodomain formation was not found, and it is thought to result from a near-surface Kirkendall-like phenomenon caused by Fe migration in the absence of Ca and Ti co-migration. Density functional theory simulations of Fe-doped bulk models reveal that Fe in an octahedral interstitial site is energetically more favorable than in a tetrahedral site. In addition to coherent nanodomains, agglomerated Fe/Fe oxide nanoparticles formed on the ceramic surface during decomposition, which altered the electrical transport mechanism. From temperature-dependent electrical conductivity measurements, it was found that heat treatment and phase decomposition change the transport mechanism from thermally activated p-type electronic conductivity through the perovskite to electronic conduction through the iron oxide formed by thermochemical decomposition. This understanding will be useful to those who are developing or employing this and similar earth-abundant functional perovskites for use under reducing conditions, at elevated temperatures, and when designing materials syntheses and processes.
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Affiliation(s)
- Jason Luong
- Department
of Materials Science and Engineering, University
of California, Irvine, Irvine, California92697, United States
| | - Xin Wang
- Department
of Materials Science and Engineering, University
of California, Irvine, Irvine, California92697, United States
| | - Alicia Tsung
- Mork
Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California90089, United States
| | - Nicholas Humphrey
- Mork
Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California90089, United States
| | - Huiming Guo
- Department
of Materials Science and Engineering, University
of California, Irvine, Irvine, California92697, United States
| | - Benjamin X. Lam
- Department
of Materials Science and Engineering, University
of California, Irvine, Irvine, California92697, United States
| | - Shaama Mallikarjun Sharada
- Mork
Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California90089, United States
- Department
of Chemistry, University of Southern California, Los Angeles, California90089, United States
| | - William J. Bowman
- Department
of Materials Science and Engineering, University
of California, Irvine, Irvine, California92697, United States
- Irvine
Materials Research Institute, University
of California, Irvine, Irvine, California92697, United States
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22
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Rudolph B, Tsiotsias AI, Ehrhardt B, Dolcet P, Gross S, Haas S, Charisou ND, Goula MA, Mascotto S. Nanoparticle Exsolution from Nanoporous Perovskites for Highly Active and Stable Catalysts. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2205890. [PMID: 36683242 PMCID: PMC9951582 DOI: 10.1002/advs.202205890] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 12/02/2022] [Indexed: 06/17/2023]
Abstract
Nanoporosity is clearly beneficial for the performance of heterogeneous catalysts. Although exsolution is a modern method to design innovative catalysts, thus far it is predominantly studied for sintered matrices. A quantitative description of the exsolution of Ni nanoparticles from nanoporous perovskite oxides and their effective application in the biogas dry reforming is here presented. The exsolution process is studied between 500 and 900 °C in nanoporous and sintered La0.52 Sr0.28 Ti0.94 Ni0.06 O3±δ . Using temperature-programmed reduction (TPR) and X-ray absorption spectroscopy (XAS), it is shown that the faster and larger oxygen release in the nanoporous material is responsible for twice as high Ni reduction than in the sintered system. For the nanoporous material, the nanoparticle formation mechanism, studied by in situ TEM and small-angle X-ray scattering (SAXS), follows the classical nucleation theory, while on sintered systems also small endogenous nanoparticles form despite the low Ni concentration. Biogas dry reforming tests demonstrate that nanoporous exsolved catalysts are up to 18 times more active than sintered ones with 90% of CO2 conversion at 800 °C. Time-on-stream tests exhibit superior long-term stability (only 3% activity loss in 8 h) and full regenerability (over three cycles) of the nanoporous exsolved materials in comparison to a commercial Ni/Al2 O3 catalyst.
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Affiliation(s)
- Benjamin Rudolph
- Institut für Anorganische und Angewandte ChemieUniversität HamburgMartin‐Luther‐King‐Platz, 620146HamburgGermany
| | | | - Benedikt Ehrhardt
- Institut für Anorganische und Angewandte ChemieUniversität HamburgMartin‐Luther‐King‐Platz, 620146HamburgGermany
| | - Paolo Dolcet
- Institute for Chemical Technology and Polymer ChemistryKarlsruhe Institute of TechnologyEngesserstrasse 2076133KarlsruheGermany
| | - Silvia Gross
- Institute for Chemical Technology and Polymer ChemistryKarlsruhe Institute of TechnologyEngesserstrasse 2076133KarlsruheGermany
- Dipartimento di Scienze ChimicheUniversità degli Studi di Padovavia Marzolo 1Padova35131Italy
| | - Sylvio Haas
- Deutsches Elektronen Synchrotron (DESY)Notkestr. 8522607HamburgGermany
| | - Nikolaos D. Charisou
- Department of Chemical EngineeringUniversity of Western MacedoniaKoilaKozani50100Greece
| | - Maria A. Goula
- Department of Chemical EngineeringUniversity of Western MacedoniaKoilaKozani50100Greece
| | - Simone Mascotto
- Institut für Anorganische und Angewandte ChemieUniversität HamburgMartin‐Luther‐King‐Platz, 620146HamburgGermany
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23
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Wang J, Kalaev D, Yang J, Waluyo I, Hunt A, Sadowski JT, Tuller HL, Yildiz B. Fast Surface Oxygen Release Kinetics Accelerate Nanoparticle Exsolution in Perovskite Oxides. J Am Chem Soc 2023; 145:1714-1727. [PMID: 36627834 DOI: 10.1021/jacs.2c10256] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Exsolution is a recent advancement for fabricating oxide-supported metal nanoparticle catalysts via phase precipitation out of a host oxide. A fundamental understanding and control of the exsolution kinetics are needed to engineer exsolved nanoparticles to obtain higher catalytic activity toward clean energy and fuel conversion. Since oxygen release via oxygen vacancy formation in the host oxide is behind oxide reduction and metal exsolution, we hypothesize that the kinetics of metal exsolution should depend on the kinetics of oxygen release, in addition to the kinetics of metal cation diffusion. Here, we probe the surface exsolution kinetics both experimentally and theoretically using thin-film perovskite SrTi0.65Fe0.35O3 (STF) as a model system. We quantitatively demonstrated that in this system the surface oxygen release governs the metal nanoparticle exsolution kinetics. As a result, by increasing the oxygen release rate in STF, either by reducing the sample thickness or by increasing the surface reactivity, one can effectively accelerate the Fe0 exsolution kinetics. Fast oxygen release kinetics in STF not only shortened the prereduction time prior to the exsolution onset, but also increased the total quantity of exsolved Fe0 over time, which agrees well with the predictions from our analytical kinetic modeling. The consistency between the results obtained from in situ experiments and analytical modeling provides a predictive capability for tailoring exsolution, and highlights the importance of engineering host oxide surface oxygen release kinetics in designing exsolved nanocatalysts.
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Affiliation(s)
- Jiayue Wang
- Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Dmitri Kalaev
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Jing Yang
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Iradwikanari Waluyo
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York11973, United States
| | - Adrian Hunt
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York11973, United States
| | - Jerzy T Sadowski
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York11973, United States
| | - Harry L Tuller
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Bilge Yildiz
- Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States.,Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
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24
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Fu L, Zhou J, Deng Q, Yang J, Li Q, Zhu Z, Wu K. Interfacial electron transfer in heterojunction nanofibers for highly efficient oxygen evolution reaction. NANOSCALE 2023; 15:677-686. [PMID: 36515280 DOI: 10.1039/d2nr05000e] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Efficient catalysts for the oxygen evolution reaction (OER) are critical to the progress of electrochemical devices for clean energy conversion and storage. Although heterogeneous electrocatalysts have superior activity, it is a great challenge to elucidate electron transfer at surface catalytic sites and intrinsic mechanisms. Herein, we demonstrate a new type of heterostructure electrocatalyst in which Sr0.9Ce0.05Fe0.95Ru0.05O3 fibers are hybridized with in situ grown RuO2 nanoparticles (SCFR-RuO2). We investigate its unique structure, electron transfer mechanisms related to the highly OER activity by combining experimental and theoretical calculations. Remarkably, SCFR-RuO2 shows an optimized OER overpotential of 295 mV at 10 mA cm-2. The promoted electron transfer and OER kinetics are ascribed to the coupling of electronic effects at the SCFR-RuO2 heterostructure. A strong triangular relationship among overpotential-Tafel slope-work function is proposed to be a potential descriptor of OER activity in SCFR-RuO2. These insights provide guidelines for tuning the OER performance via modified work functions in perovskite electrocatalysts.
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Affiliation(s)
- Lei Fu
- Center of Nanomaterials for Renewable Energy, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
| | - Jun Zhou
- Center of Nanomaterials for Renewable Energy, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
| | - Qinyuan Deng
- Center of Nanomaterials for Renewable Energy, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
| | - Jiaming Yang
- Center of Nanomaterials for Renewable Energy, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
| | - Qinghao Li
- Center of Nanomaterials for Renewable Energy, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
| | - Zihe Zhu
- Center of Nanomaterials for Renewable Energy, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
| | - Kai Wu
- Center of Nanomaterials for Renewable Energy, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
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25
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Kim JK, Kim S, Kim S, Kim HJ, Kim K, Jung W, Han JW. Dynamic Surface Evolution of Metal Oxides for Autonomous Adaptation to Catalytic Reaction Environments. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2203370. [PMID: 35738568 DOI: 10.1002/adma.202203370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 06/21/2022] [Indexed: 06/15/2023]
Abstract
Metal oxides possessing distinctive physical/chemical properties due to different crystal structures and stoichiometries play a pivotal role in numerous current technologies, especially heterogeneous catalysis for production/conversion of high-valued chemicals and energy. To date, many researchers have investigated the effect of the structure and composition of these materials on their reactivity to various chemical and electrochemical reactions. However, metal oxide surfaces evolve from their initial form under dynamic reaction conditions due to the autonomous behaviors of the constituent atoms to adapt to the surrounding environment. Such nanoscale surface phenomena complicate reaction mechanisms and material properties, interrupting the clarification of the origin of functionality variations in reaction environments. In this review, the current findings on the spontaneous surface reorganization of metal oxides during reactions are categorized into three types: 1) the appearance of nano-sized second phase from oxides, 2) the (partial) encapsulation of oxide atoms toward supported metal surfaces, and 3) the oxide surface reconstruction with selective cation leaching in aqueous solution. Then their effects on each reaction are summarized in terms of activity and stability, providing novel insight for those who design metal-oxide-based catalytic materials.
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Affiliation(s)
- Jun Kyu Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Sangwoo Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Seunghyun Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Hyung Jun Kim
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, 37673, South Korea
| | - Kyeounghak Kim
- Department of Chemical Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul, 04763, South Korea
| | - WooChul Jung
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Jeong Woo Han
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, 37673, South Korea
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26
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Han L, Zhang J, Zou M, Tong JJ. Toward Superb Perovskite Oxide Electrocatalysts: Engineering of Coupled Nanocomposites. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2204784. [PMID: 36300911 DOI: 10.1002/smll.202204784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 09/06/2022] [Indexed: 06/16/2023]
Abstract
A significant issue that bedeviled the commercialization of renewable energy technologies, ranging from low-temperature water electrolyzers to high-temperature solid oxide cells, is the lack of high-performance catalysts. Among various candidates that could tackle such a challenge, perovskite oxides are rising-star materials because of their unique structural and compositional flexibility. However, single-phase perovskite oxides are challenging to satisfy all the requirements of electrocatalysts concurrently for practical applications, such as high catalytic activity, excellent stability, good ionic and electronic conductivities, and superior chemical/thermo-mechanical robustness. Impressively, perovskite oxides with coupled nanocomposites are emerging as a novel form offering multifunctionality due to their intrinsic features, including infinite interfaces with solid interaction, tunable compositions, flexible configurations, and maximum synergistic effects between assorted components. Considering this new configuration has attracted great attention owing to its promising performances in various energy-related applications, this review timely summarizes the leading-edge development of perovskite oxide-based coupled nanocomposites. Their state-of-art synthetic strategies are surveyed and highlighted, their unique structural advantages are highlighted and illustrated through the typical oxygen reduction reaction and oxygen evolution reactions in both high and low-temperature applications. Opinions on the current critical scientific issues and opportunities in this burgeoning research field are all provided.
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Affiliation(s)
- Liang Han
- Department of Materials Science and Engineering, Clemson University, Clemson, SC, 29634, USA
| | - Jiawei Zhang
- Department of Materials Science and Engineering, Clemson University, Clemson, SC, 29634, USA
| | - Minda Zou
- Department of Materials Science and Engineering, Clemson University, Clemson, SC, 29634, USA
| | - Jianhua Joshua Tong
- Department of Materials Science and Engineering, Clemson University, Clemson, SC, 29634, USA
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27
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Yang Y, Wang S, Tu X, Hu Z, Zhu Y, Guo H, Li Z, Zhang L, Peng M, Jia L, Yang M, Yang G, Qiao X, Sun J, Liang X, Zhang Z, Zhu Y, Shi L, Jiang C, Zhao Y, Li J, Shao Z, Zhang X, Sun Y. Atomic cerium modulated palladium nanoclusters exsolved ferrite catalysts for lean methane conversion. EXPLORATION (BEIJING, CHINA) 2022; 2:20220060. [PMID: 37324800 PMCID: PMC10190994 DOI: 10.1002/exp.20220060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Accepted: 05/31/2022] [Indexed: 06/17/2023]
Abstract
The active and stable palladium (Pd) based catalysts for CH4 conversion are of great environmental and industrial significance. Herein, we employed N2 as an optimal activation agent to develop a Pd nanocluster exsolved Ce-incorporated perovskite ferrite catalyst toward lean methane oxidation. Replacing the traditional initiator of H2, the N2 was found as an effective driving force to selectively touch off the surface exsolution of Pd nanocluster from perovskite framework without deteriorating the overall material robustness. The catalyst showed an outstanding T50 (temperature of 50% conversion) plummeting down to 350°C, outperforming the pristine and H2-activated counterparts. Further, the combined theoretical and experimental results also deciphered the crucial role that the atomically dispersed Ce ions played in both construction of active sites and CH4 conversion. The isolated Ce located at the A-site of perovskite framework facilitated the thermodynamic and kinetics of the Pd exsolution process, lowering its formation temperature and promoting its quantity. Moreover, the incorporation of Ce lowered the energy barrier for cleavage of C─H bond, and was dedicated to the preservation of highly reactive PdOx moieties during stability measurement. This work successfully ventures uncharted territory of in situ exsolution to provide a new design thinking for a highly performed catalytic interface.
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Affiliation(s)
| | - Si Wang
- Beijing State Key Laboratory of Chemical Resource EngineeringBeijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijingChina
| | - Xin Tu
- Department of Electrical Engineering and ElectronicsUniversity of LiverpoolLiverpoolUK
| | - Zhiwei Hu
- Max Planck Institute for Chemical Physics of SolidsDresdenGermany
| | - Yinlong Zhu
- Institute for Frontier ScienceNanjing University of Aeronautics and AstronauticsNanjingChina
| | | | - Zhishan Li
- College of EnergyXiamen UniversityXiamenChina
| | - Li Zhang
- College of EnergyXiamen UniversityXiamenChina
| | - Meilan Peng
- College of EnergyXiamen UniversityXiamenChina
| | - Lichao Jia
- School of Materials Science and Engineering, State Key Lab of Material Processing and Die & Mould TechnologyHuazhong University of Science and TechnologyWuhanChina
| | - Meiting Yang
- State Key Laboratory of Materials‐Oriented Chemical Engineering, College of Chemical EngineeringNanjing Tech UniversityNanjingChina
| | - Guangming Yang
- State Key Laboratory of Materials‐Oriented Chemical Engineering, College of Chemical EngineeringNanjing Tech UniversityNanjingChina
| | - Xurong Qiao
- State Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong UniversityXi'anChina
| | - Jiahui Sun
- State Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong UniversityXi'anChina
| | - Xiaolu Liang
- State Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong UniversityXi'anChina
| | - Zhen Zhang
- State Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong UniversityXi'anChina
| | - Yanru Zhu
- Beijing State Key Laboratory of Chemical Resource EngineeringBeijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijingChina
| | - Lei Shi
- School of Chemical EngineeringDalian University of TechnologyDalianChina
| | | | - Yingru Zhao
- College of EnergyXiamen UniversityXiamenChina
| | - Jianhui Li
- National Engineering Laboratory for Green Chemical Productions of Alcohols‐Ethers‐Esters, College of Chemistry and Chemical EngineeringXiamen UniversityXiamenChina
| | - Zongping Shao
- State Key Laboratory of Materials‐Oriented Chemical Engineering, College of Chemical EngineeringNanjing Tech UniversityNanjingChina
| | - Xin Zhang
- Beijing State Key Laboratory of Chemical Resource EngineeringBeijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijingChina
| | - Yifei Sun
- Beijing State Key Laboratory of Chemical Resource EngineeringBeijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijingChina
- State Key Laboratory of Physical Chemistry of Solid SurfaceXiamen UniversityXiamenChina
- Shenzhen Research Institute of Xiamen UniversityShenzhenGuangdongChina
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28
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Li Y, Liu F, Chen Z, Shi L, Zhang Z, Gong Y, Zhang Y, Tian X, Zhang Y, Qiu X, Ding X, Bai X, Jiang H, Zhu Y, Zhu J. Perovskite-Socketed Sub-3 nm Copper for Enhanced CO 2 Electroreduction to C 2. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2206002. [PMID: 36070620 DOI: 10.1002/adma.202206002] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 09/05/2022] [Indexed: 06/15/2023]
Abstract
In situ socketing metal nanoparticles onto perovskite oxides has shown great potential in heterogeneous catalysis, but its employment in boosting ambient CO2 electroreduction (CER) is unexplored. Here, a CER catalyst of perovskite-socketed sub-3 nm Cu equipped with strong metal-support interactions (SMSIs) is constructed to promote efficient and stable CO2 -to-C2+ conversion. For such a catalyst, plentiful sub-3 nm ellipsoid Cu particles are homogeneously and epitaxially anchored on the perovskite backbones, with concomitant creation of significant SMSIs. These SMSIs are able to not only modulate electronic structure of active Cu and facilitate adsorption/activation of key intermediates, but also to strengthen perovskite-Cu adhesion and intensify resistance to structural degradation. Beneficial from these advantageous merits, when evaluated in CER, it performs comparably to or better than most reported Cu-based heteronanostructures. Relative to a physical-mixture counterpart, it features marked improvements (up to 6.2 folds) in activity and selectivity for C2+ , together with greatly boosted stability (>80 h). This work gives a new avenue to rationally design more advanced Cu-based heteronanostructures for CER.
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Affiliation(s)
- Yuxi Li
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China
| | - Fuzhu Liu
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Zitao Chen
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Lei Shi
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China
| | - Zhenbao Zhang
- School of Chemistry and Chemical Engineering, Linyi University, Linyi, 276005, China
| | - Yue Gong
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, China
| | - Yu Zhang
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Xuezeng Tian
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Yu Zhang
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Xiaoyu Qiu
- School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, China
| | - Xiangdong Ding
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Xuedong Bai
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Heqing Jiang
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Yongfa Zhu
- Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Jiawei Zhu
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China
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29
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Guo J, Cai R, Cali E, Wilson GE, Kerherve G, Haigh SJ, Skinner SJ. Low-Temperature Exsolution of Ni-Ru Bimetallic Nanoparticles from A-Site Deficient Double Perovskites. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2107020. [PMID: 35182013 DOI: 10.1002/smll.202107020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 01/07/2022] [Indexed: 06/14/2023]
Abstract
Exsolution of stable metallic nanoparticles for use as efficient electrocatalysts has been of increasing interest for a range of energy technologies. Typically, exsolved nanoparticles show higher thermal and coarsening stability compared to conventionally deposited catalysts. Here, A-site deficient double perovskite oxides, La2- x NiRuO6- δ (x = 0.1 and 0.15), are designed and subjected to low-temperature reduction leading to exsolution. The reduced double perovskite materials are shown to exsolve nanoparticles of 2-6 nm diameter during the reduction in the low-temperature range of 350-450 °C. The nanoparticle sizes are found to increase after reduction at the higher temperature (450 °C), suggesting diffusion-limited particle growth. Interestingly, both nickel and ruthenium are co-exsolved during the reduction process. The formation of bimetallic nanoparticles at such low temperatures is rare. From the in situ impedance spectroscopy measurements of the double perovskite electrode layers, the onset of the exsolution process is found to be within the first few minutes of the reduction reaction. In addition, the area-specific resistance of the electrode layers is found to decrease by 90% from 291 to 29 Ω cm2 , suggesting encouraging prospects for these low-temperature rapidly exsolved Ni/Ru alloy nanoparticles in a range of catalytic applications.
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Affiliation(s)
- Jia Guo
- Department of Materials, Imperial College London, Exhibition Road, London, SW7 2AZ, UK
| | - Rongsheng Cai
- Department of Materials, University of Manchester, Manchester, M13 9PL, UK
| | - Eleonora Cali
- Department of Materials, Imperial College London, Exhibition Road, London, SW7 2AZ, UK
| | - George E Wilson
- Department of Materials, Imperial College London, Exhibition Road, London, SW7 2AZ, UK
| | - Gwilherm Kerherve
- Department of Materials, Imperial College London, Exhibition Road, London, SW7 2AZ, UK
| | - Sarah J Haigh
- Department of Materials, University of Manchester, Manchester, M13 9PL, UK
| | - Stephen J Skinner
- Department of Materials, Imperial College London, Exhibition Road, London, SW7 2AZ, UK
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30
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Boosting the stability of perovskites with exsolved nanoparticles by B-site supplement mechanism. Nat Commun 2022; 13:4618. [PMID: 35941119 PMCID: PMC9359987 DOI: 10.1038/s41467-022-32393-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 07/29/2022] [Indexed: 11/08/2022] Open
Abstract
Perovskites with exsolved nanoparticles (P-eNs) have immense potentials for carbon dioxide (CO2) reduction in solid oxide electrolysis cell. Despite the recent achievements in promoting the B-site cation exsolution for enhanced catalytic activities, the unsatisfactory stability of P-eNs at high voltages greatly impedes their practical applications and this issue has not been elucidated. In this study, we reveal that the formation of B-site vacancies in perovskite scaffold is the major contributor to the degradation of P-eNs; we then address this issue by fine-regulating the B-site supplement of the reduced Sr2Fe1.3Ni0.2Mo0.5O6-δ using foreign Fe sources, achieving a robust perovskite scaffold and prolonged stability performance. Furthermore, the degradation mechanism from the perspective of structure stability of perovskite has also been proposed to understand the origins of performance deterioration. The B-site supplement endows P-eNs with the capability to become appealing electrocatalysts for CO2 reduction and more broadly, for other energy storage and conversion systems.
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Exsolution-like synthesis of Ni/(Nd2O3,CaO) nanocomposites from Nd2-xCaxNiO4 precursors for catalytic applications. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123267] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Wang J, Kumar A, Wardini JL, Zhang Z, Zhou H, Crumlin EJ, Sadowski JT, Woller KB, Bowman WJ, LeBeau JM, Yildiz B. Exsolution-Driven Surface Transformation in the Host Oxide. NANO LETTERS 2022; 22:5401-5408. [PMID: 35771744 DOI: 10.1021/acs.nanolett.2c01439] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Exsolution synthesizes self-assembled metal nanoparticle catalysts via phase precipitation. An overlooked aspect in this method thus far is how exsolution affects the host oxide surface chemistry and structure. Such information is critical as the oxide itself can also contribute to the overall catalytic activity. Combining X-ray and electron probes, we investigated the surface transformation of thin-film SrTi0.65Fe0.35O3 during Fe0 exsolution. We found that exsolution generates a highly Fe-deficient near-surface layer of about 2 nm thick. Moreover, the originally single-crystalline oxide near-surface region became partially polycrystalline after exsolution. Such drastic transformations at the surface of the oxide are important because the exsolution-induced nonstoichiometry and grain boundaries can alter the oxide ion transport and oxygen exchange kinetics and, hence, the catalytic activity toward water splitting or hydrogen oxidation reactions. These findings highlight the need to consider the exsolved oxide surface, in addition to the metal nanoparticles, in designing the exsolved nanocatalysts.
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Affiliation(s)
- Jiayue Wang
- Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Abinash Kumar
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Jenna L Wardini
- Department of Materials Science & Engineering, University of California, Irvine, California 92697, United States
| | - Zhan Zhang
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Hua Zhou
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Ethan J Crumlin
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Jerzy T Sadowski
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Kevin B Woller
- Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - William J Bowman
- Department of Materials Science & Engineering, University of California, Irvine, California 92697, United States
| | - James M LeBeau
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Bilge Yildiz
- Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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Tsiotsias AI, Ehrhardt B, Rudolph B, Nodari L, Kim S, Jung W, Charisiou ND, Goula MA, Mascotto S. Bimetallic Exsolved Heterostructures of Controlled Composition with Tunable Catalytic Properties. ACS NANO 2022; 16:8904-8916. [PMID: 35709497 DOI: 10.1021/acsnano.1c11111] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
In this paper, we show how the composition of bimetallic Fe-Ni exsolution can be controlled by the nature and concentration of oxygen vacancies in the parental matrix and how this is used to modify the performance of CO2-assisted ethane conversion. Mesoporous A-site-deficient La0.4Sr0.6-αTi0.6Fe0.35Ni0.05O3±δ (0 ≤ α ≤ 0.2) perovskites with substantial specific surface area (>40 m2/g) enabled fast exsolution kinetics (T < 500 °C, t < 1 h) of bimetallic Fe-Ni nanoparticles of increasing size (3-10 nm). Through the application of a multitechnique approach we found that the A-site deficiency determined the concentration of oxygen vacancies associated with iron, which controlled the Fe reduction. Instead of homogeneous bimetallic nanoparticles, the increasing Fe fraction from 37 to 57% led to the emergence of bimodal Fe/Ni3Fe systems. Catalytic tests showed superior stability of our catalysts with respect to commercial Ni/Al2O3. Ethane reforming was found to be the favored pathway, but an increase in selectivity toward ethane dehydrogenation occurred for the systems with a low metallic Fe fraction. The chance to control the reduction and growth processes of bimetallic exsolution offers interesting prospects for the design of advanced catalysts based on bimodal nanoparticle heterostructures.
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Affiliation(s)
- Anastasios I Tsiotsias
- Institut für Anorganische und Angewandte Chemie, Universität Hamburg, Martin-Luther-King Platz 6, 20146 Hamburg, Germany
- Department of Chemical Engineering, University of Western Macedonia, 50100 Koila, Kozani, Greece
| | - Benedikt Ehrhardt
- Institut für Anorganische und Angewandte Chemie, Universität Hamburg, Martin-Luther-King Platz 6, 20146 Hamburg, Germany
| | - Benjamin Rudolph
- Institut für Anorganische und Angewandte Chemie, Universität Hamburg, Martin-Luther-King Platz 6, 20146 Hamburg, Germany
| | - Luca Nodari
- Department of Chemical Science, University of Padua, Via F. Marzolo, 1, 35122 Padova, Italy
- Institute of Condensed Matter Chemistry and Technologies for Energy, National Research Council. C.so Stati Uniti 4, 35127 Padova, Italy
| | - Seunghyun Kim
- Department of Materials Science and Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - WooChul Jung
- Department of Materials Science and Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Nikolaos D Charisiou
- Department of Chemical Engineering, University of Western Macedonia, 50100 Koila, Kozani, Greece
| | - Maria A Goula
- Department of Chemical Engineering, University of Western Macedonia, 50100 Koila, Kozani, Greece
| | - Simone Mascotto
- Institut für Anorganische und Angewandte Chemie, Universität Hamburg, Martin-Luther-King Platz 6, 20146 Hamburg, Germany
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Yentekakis IV, Georgiadis AG, Drosou C, Charisiou ND, Goula MA. Selective Catalytic Reduction of NO x over Perovskite-Based Catalysts Using C xH y(O z), H 2 and CO as Reducing Agents-A Review of the Latest Developments. NANOMATERIALS 2022; 12:nano12071042. [PMID: 35407160 PMCID: PMC9000253 DOI: 10.3390/nano12071042] [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: 02/22/2022] [Revised: 03/16/2022] [Accepted: 03/18/2022] [Indexed: 12/04/2022]
Abstract
Selective catalytic reduction (SCR) is probably the most widespread process for limiting NOx emissions under lean conditions (O2 excess) and, in addition to the currently used NH3 or urea as a reducing agent, many other alternative reductants could be more promising, such as CxHy/CxHyOz, H2 and CO. Different catalysts have been used thus far for NOx abatement from mobile (automotive) and stationary (fossil fuel combustion plants) sources, however, perovskites demand considerable attention, partly due to their versatility to combine and incorporate various chemical elements in their lattice that favor deNOx catalysis. In this work, the CxHy/CxHyOz−, H2−, and CO-SCR of NOx on perovskite-based catalysts is reviewed, with particular emphasis on the role of the reducing agent nature and perovskite composition. An effort has also been made to further discuss the correlation between the physicochemical properties of the perovskite-based catalysts and their deNOx activity. Proposed kinetic models are presented as well, that delve deeper into deNOx mechanisms over perovskite-based catalysts and potentially pave the way for further improving their deNOx efficiency.
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Affiliation(s)
- Ioannis V. Yentekakis
- Laboratory of Physical Chemistry & Chemical Processes, School of Chemical & Environmental Engineering, Technical University of Crete, 73100 Chania, Greece;
- Foundation for Research and Technology—Hellas/Institute of Geoenergy (FORTH/IG), Technical University of Crete, Building M1, University Campus, 73100 Chania, Greece
- Correspondence: (I.V.Y.); (M.A.G.); Tel.: +30-28210-37752 (I.V.Y.); +30-24610-68296 (M.A.G.)
| | - Amvrosios G. Georgiadis
- Laboratory of Alternative Fuels and Environmental Catalysis (LAFEC), Department of Chemical Engineering, University of Western Macedonia, Koila, 50100 Kozani, Greece; (A.G.G.); (N.D.C.)
| | - Catherine Drosou
- Laboratory of Physical Chemistry & Chemical Processes, School of Chemical & Environmental Engineering, Technical University of Crete, 73100 Chania, Greece;
| | - Nikolaos D. Charisiou
- Laboratory of Alternative Fuels and Environmental Catalysis (LAFEC), Department of Chemical Engineering, University of Western Macedonia, Koila, 50100 Kozani, Greece; (A.G.G.); (N.D.C.)
| | - Maria A. Goula
- Laboratory of Alternative Fuels and Environmental Catalysis (LAFEC), Department of Chemical Engineering, University of Western Macedonia, Koila, 50100 Kozani, Greece; (A.G.G.); (N.D.C.)
- Correspondence: (I.V.Y.); (M.A.G.); Tel.: +30-28210-37752 (I.V.Y.); +30-24610-68296 (M.A.G.)
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Li Z, Yang Y, Tian J, Li J, Chen G, Zhou L, Sun Y, Qiu Y. Selective Photocatalytic Reduction of CO 2 to Syngas Over Tunable Metal-Perovskite Interface. CHEMSUSCHEM 2022; 15:e202102729. [PMID: 35102710 DOI: 10.1002/cssc.202102729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 01/17/2022] [Indexed: 06/14/2023]
Abstract
The extensive emission of CO2 results in critical environmental issues, such as global warming. Photocatalytic CO2 conversion is a meaningful route to convert CO2 into useful chemicals. However, the highly selective reduction of CO2 with the avoidance of hydrogen evolution is still challenging. Herein, the photocatalytic reduction CO2 to synthesis gas (syngas) was achieved on a metal Ag socketed perovskite LaFeO3 (LFO) catalytic interface prepared by an in-situ exsolution method. The conduction band of Ag-exsolved LFO is more negative than LFO, benefiting efficient CO2 reduction. By tuning the dopant Ag cation in the lattice to nanoparticles pinned on the surface, the CO formation rate was improved around five-fold from 0.51 to 2.41 μmol g-1 h-1 . Meanwhile, the H2 /CO molar ratio also showed strong dependence on the modality of Ag at the metal-perovskite interface. The design offers a promising pathway for transforming CO2 to valuable chemicals based on efficient photocatalysts design.
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Affiliation(s)
- Zhang Li
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, Guangdong, 523808, P.R. China
- College of Energy, Xiamen University, Xiamen, 361005, P.R. China
| | - Yanling Yang
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, Guangdong, 523808, P.R. China
- College of Energy, Xiamen University, Xiamen, 361005, P.R. China
| | - Jinshu Tian
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Jianhui Li
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P.R. China
| | - Gui Chen
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, Guangdong, 523808, P.R. China
| | - Liujiang Zhou
- School of Physics, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| | - Yifei Sun
- College of Energy, Xiamen University, Xiamen, 361005, P.R. China
| | - Yongfu Qiu
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, Guangdong, 523808, P.R. China
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Wang M, Zhang B, Ding J, Zhang F, Tu R, Bernards MT, He Y, Xie P, Shi Y. A Robust Approach to In Situ Exsolve Highly Dispersed and Stable Electrocatalysts. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2105741. [PMID: 35038227 DOI: 10.1002/smll.202105741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 11/25/2021] [Indexed: 06/14/2023]
Abstract
Catalysts made of in situ exsolved metal nanoparticles often demonstrate promising activity and high stability in many applications. However, the traditional approach is limited by perovskites as prevailing precursor and requires high temperature typically above 900 K. Here, with the guidance of theoretical calculation, an unprecedented and substantially facile technique is demonstrated for Cu nanoparticles exsolved from interstitially Cu cations doped nickel-based hydroxide, which is accomplished swiftly at room temperature and results in metal nanoparticles with a quasi-uniform size of 4 nm, delivering an exceptional CO faradaic efficiency of 95.6% for the electrochemical reduction of CO2 with a notable durability. This design principle is further proven to be generally applicable to other metals and foregrounded for guiding the development of advanced catalytic materials.
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Affiliation(s)
- Mengchu Wang
- College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Zhejiang University-Quzhou, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, P. R. China
| | - Bike Zhang
- College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Zhejiang University-Quzhou, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, P. R. China
| | - Jiaqi Ding
- College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Zhejiang University-Quzhou, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, P. R. China
| | - Fanxing Zhang
- College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Zhejiang University-Quzhou, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, P. R. China
| | - Rui Tu
- College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Zhejiang University-Quzhou, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, P. R. China
| | - Matthew T Bernards
- Department of Chemical and Biological Engineering, University of Idaho, Moscow, ID, 83844, USA
| | - Yi He
- College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Zhejiang University-Quzhou, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, P. R. China
- Department of Chemical Engineering, University of Washington, Seattle, WA, 98195, USA
| | - Pengfei Xie
- College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Zhejiang University-Quzhou, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, P. R. China
| | - Yao Shi
- College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Zhejiang University-Quzhou, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, P. R. China
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Exploring the Stability of Fe–Ni Alloy Nanoparticles Exsolved from Double-Layered Perovskites for Dry Reforming of Methane. Catalysts 2021. [DOI: 10.3390/catal11060741] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Exsolution is emerging as a promising route for the creation of nanoparticles that remain anchored to the oxide support, imparting remarkable stability in high temperature chemical processes such as dry reforming of methane. This process takes place at temperatures around 850 °C, which causes sintering-related issues in catalysts prepared using conventional impregnation methods, which could be overcome by using exsolution functionalized oxides. In this work, FeNi3 alloy nanoparticles exsolved from Sr2FexNi1-xMoO6-δ double-layered perovskites were evaluated as a dry reforming catalyst, paying special attention to structure–activity relationships. Our results indicate that increasing the Ni content favors the nanoparticle dispersion, eventually leading to increased CO2 and CH4 conversions. The exsolved nanoparticles presented remarkable nanoparticle size (ca. 30 nm) stability after the 10 h treatment, although the formation of some phase segregations over the course of the reaction caused a minor decrease in the nanoparticle population. Overall, the results presented here serve as materials processing guidelines that could find further potential use in the design of more efficient (electro)catalysts in other fuel production or energy conversion technologies.
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Liu W. Controlling lattice oxygen activity of oxygen carrier materials by design: a review and perspective. REACT CHEM ENG 2021. [DOI: 10.1039/d1re00209k] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The lattice oxygen activity of oxygen carriers is critical to chemical looping processes and can be effectively controlled with prepared (i) solid solution mixtures, (ii) ternary oxide phases or (iii) core–shell structured oxygen carriers.
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Affiliation(s)
- Wen Liu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
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