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Wu K, Zanina A, Kondratenko VA, Xu L, Li J, Chen J, Lund H, Bartling S, Li Y, Jiang G, Kondratenko EV. Fundamentals of Unanticipated Efficiency of Gd 2O 3-based Catalysts in Oxidative Coupling of Methane. Angew Chem Int Ed Engl 2024; 63:e202319192. [PMID: 38271543 DOI: 10.1002/anie.202319192] [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: 12/12/2023] [Accepted: 01/24/2024] [Indexed: 01/27/2024]
Abstract
Improving the selectivity in the oxidative coupling of methane to ethane/ethylene poses a significant challenge for commercialization. The required improvements are hampered by the uncertainties associated with the reaction mechanism due to its complexity. Herein, we report about 90 % selectivity to the target products at 11 % methane conversion over Gd2O3-based catalysts at 700 °C using N2O as the oxidant. Sophisticated kinetic studies have suggested the nature of adsorbed oxygen species and their binding strength as key parameters for undesired methane oxidation to carbon oxides. These descriptors can be controlled by a metal oxide promoter for Gd2O3.
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Affiliation(s)
- Kai Wu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, China
- Department of Advanced methods for applied catalysis, Leibniz-Institut für Katalyse e.V., Albert-Einstein-Str. 29a, 18059, Rostock, Germany
| | - Anna Zanina
- Department of Advanced methods for applied catalysis, Leibniz-Institut für Katalyse e.V., Albert-Einstein-Str. 29a, 18059, Rostock, Germany
| | - Vita A Kondratenko
- Department of Advanced methods for applied catalysis, Leibniz-Institut für Katalyse e.V., Albert-Einstein-Str. 29a, 18059, Rostock, Germany
| | - Lin Xu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, China
- Department of Advanced methods for applied catalysis, Leibniz-Institut für Katalyse e.V., Albert-Einstein-Str. 29a, 18059, Rostock, Germany
| | - Jianshu Li
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, China
| | - Juan Chen
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, China
| | - Henrik Lund
- Department of Advanced methods for applied catalysis, Leibniz-Institut für Katalyse e.V., Albert-Einstein-Str. 29a, 18059, Rostock, Germany
| | - Stephan Bartling
- Department of Advanced methods for applied catalysis, Leibniz-Institut für Katalyse e.V., Albert-Einstein-Str. 29a, 18059, Rostock, Germany
| | - Yuming Li
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, China
| | - Guiyuan Jiang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, China
| | - Evgenii V Kondratenko
- Department of Advanced methods for applied catalysis, Leibniz-Institut für Katalyse e.V., Albert-Einstein-Str. 29a, 18059, Rostock, Germany
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2
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D'Andria M, Krumeich F, Yao Z, Wang FR, Güntner AT. Structure-Function Relationship of Highly Reactive CuO x Clusters on Co 3 O 4 for Selective Formaldehyde Sensing at Low Temperatures. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2308224. [PMID: 38143268 PMCID: PMC10933674 DOI: 10.1002/advs.202308224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 12/08/2023] [Indexed: 12/26/2023]
Abstract
Designing reactive surface clusters at the nanoscale on metal-oxide supports enables selective molecular interactions in low-temperature catalysis and chemical sensing. Yet, finding effective material combinations and identifying the reactive site remains challenging and an obstacle for rational catalyst/sensor design. Here, the low-temperature oxidation of formaldehyde with CuOx clusters on Co3 O4 nanoparticles is demonstrated yielding an excellent sensor for this critical air pollutant. When fabricated by flame-aerosol technology, such CuOx clusters are finely dispersed, while some Cu ions are incorporated into the Co3 O4 lattice enhancing thermal stability. Importantly, infrared spectroscopy of adsorbed CO, near edge X-ray absorption fine structure spectroscopy and temperature-programmed reduction in H2 identified Cu+ and Cu2+ species in these clusters as active sites. Remarkably, the Cu+ surface concentration correlated with the apparent activation energy of formaldehyde oxidation (Spearman's coefficient ρ = 0.89) and sensor response (0.96), rendering it a performance descriptor. At optimal composition, such sensors detected even the lowest formaldehyde levels of 3 parts-per-billion (ppb) at 75°C, superior to state-of-the-art sensors. Also, selectivity to other aldehydes, ketones, alcohols, and inorganic compounds, robustness to humidity and stable performance over 4 weeks are achieved, rendering such sensors promising as gas detectors in health monitoring, air and food quality control.
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Affiliation(s)
- Matteo D'Andria
- Human‐centered Sensing Laboratory, Department of Mechanical and Process Engineering, ETH ZurichZurichCH‐8092Switzerland
| | - Frank Krumeich
- Department of Chemistry and Applied BiosciencesLaboratory of Inorganic Chemistry, ETH ZurichZurichCH‐8093Switzerland
| | - Zhangyi Yao
- Department of Chemical EngineeringUniversity College LondonLondonWC1E 7JEUK
| | - Feng Ryan Wang
- Department of Chemical EngineeringUniversity College LondonLondonWC1E 7JEUK
| | - Andreas T. Güntner
- Human‐centered Sensing Laboratory, Department of Mechanical and Process Engineering, ETH ZurichZurichCH‐8092Switzerland
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3
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Yang Q, Surin I, Geiger J, Eliasson H, Agrachev M, Kondratenko VA, Zanina A, Krumeich F, Jeschke G, Erni R, Kondratenko EV, López N, Pérez-Ramírez J. Lattice-Stabilized Chromium Atoms on Ceria for N 2O Synthesis. ACS Catal 2023; 13:15977-15990. [PMID: 38125976 PMCID: PMC10728900 DOI: 10.1021/acscatal.3c04463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 11/14/2023] [Accepted: 11/15/2023] [Indexed: 12/23/2023]
Abstract
The development of selective catalysts for direct conversion of ammonia into nitrous oxide, N2O, will circumvent the conventional five-step manufacturing process and enable its wider utilization in oxidation catalysis. Deviating from commonly accepted catalyst design principles for this reaction, reliant on manganese oxide, we herein report an efficient system comprised of isolated chromium atoms (1 wt %) stabilized in the ceria lattice by coprecipitation. The latter, in contrast to a simple impregnation approach, ensures firm metal anchoring and results in stable and selective N2O production over 100 h on stream up to 79% N2O selectivity at full NH3 conversion. Raman, electron paramagnetic resonance, and in situ UV-vis spectroscopies reveal that chromium incorporation enhances the density of oxygen vacancies and the rate of their generation and healing. Accordingly, temporal analysis of products, kinetic studies, and atomistic simulations show lattice oxygen of ceria to directly participate in the reaction, establishing the cocatalytic role of the carrier. Coupled with the dynamic restructuring of chromium sites to stabilize intermediates of N2O formation, these factors enable catalytic performance on par with or exceeding benchmark systems. These findings demonstrate how nanoscale engineering can elevate a previously overlooked metal into a highly competitive catalyst for selective ammonia oxidation to N2O, paving the way toward industrial implementation.
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Affiliation(s)
- Qingxin Yang
- Institute
for Chemical and Bioengineering, Department of Chemistry and Applied
Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093 Zürich, Switzerland
| | - Ivan Surin
- Institute
for Chemical and Bioengineering, Department of Chemistry and Applied
Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093 Zürich, Switzerland
| | - Julian Geiger
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Henrik Eliasson
- Electron
Microscopy Center, Empa - Swiss Federal
Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Mikhail Agrachev
- Laboratory
of Physical Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Vita A. Kondratenko
- Advanced
Methods for Applied Catalysis, Leibniz-Institut
für Katalyse e. V., Albert Einstein-Str. 29a, 18059 Rostock, Germany
| | - Anna Zanina
- Advanced
Methods for Applied Catalysis, Leibniz-Institut
für Katalyse e. V., Albert Einstein-Str. 29a, 18059 Rostock, Germany
| | - Frank Krumeich
- Laboratory
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093 Zürich, Switzerland
| | - Gunnar Jeschke
- Laboratory
of Physical Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Rolf Erni
- Electron
Microscopy Center, Empa - Swiss Federal
Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Evgenii V. Kondratenko
- Advanced
Methods for Applied Catalysis, Leibniz-Institut
für Katalyse e. V., Albert Einstein-Str. 29a, 18059 Rostock, Germany
| | - Núria López
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Javier Pérez-Ramírez
- Institute
for Chemical and Bioengineering, Department of Chemistry and Applied
Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093 Zürich, Switzerland
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4
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Eliasson H, Niu Y, Palmer RE, Grönbeck H, Erni R. Support-facet-dependent morphology of small Pt particles on ceria. NANOSCALE 2023; 15:19091-19098. [PMID: 37929917 DOI: 10.1039/d3nr04701f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2023]
Abstract
Direct atomic scale information on how the structure of supported nanoparticles is affected by the metal-support interaction is rare. Using scanning transmission electron microscopy, we provide direct evidence of a facet-dependent support interaction for Pt nanoparticles on CeO2, governing the dimensionality of small platinum particles. Our findings indicate that particles consisting of less than ∼130 atoms prefer a 3D shape on CeO2(111) facets, while 2D raft structures are favored on CeO2(100) facets. Measurements of stationary particles on both surface facets are supplemented by time resolved measurements following a single particle with atomic resolution as it migrates from CeO2(111) to CeO2(100), undergoing a dimensionality change from 3D to 2D. The intricate transformation mechanism reveals how the 3D particle disassembles and completely wets a neighboring CeO2(100) facet. Density functional theory calculations confirm the structure-trend and reveal the thermodynamic driving force for the migration of small particles. Knowledge of the presented metal-support interactions is crucial to establish structure-function relationships in a range of applications based on supported nanostructures.
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Affiliation(s)
- Henrik Eliasson
- Electron Microscopy Center, Empa - Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland.
| | - Yubiao Niu
- Nanomaterials Lab, Faculty of Science and Engineering, Swansea University, Bay Campus, Swansea, SA1 8EN, UK
| | - Richard E Palmer
- Nanomaterials Lab, Faculty of Science and Engineering, Swansea University, Bay Campus, Swansea, SA1 8EN, UK
| | - Henrik Grönbeck
- Department of Physics and Competence Centre for Catalysis, Chalmers University of Technology, SE-41296 Göteborg, Sweden
| | - Rolf Erni
- Electron Microscopy Center, Empa - Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland.
- Department of Materials, ETH Zurich, CH-8093 Zurich, Switzerland
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5
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Kim D, Dimitrakopoulos G, Yildiz B. Controlling the Size of Au Nanoparticles on Reducible Oxides with the Electrochemical Potential. J Am Chem Soc 2022; 144:21926-21938. [PMID: 36441525 DOI: 10.1021/jacs.2c08422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Controlling the size of Au nanoparticles (NPs) and their interaction with the oxide support is important for their catalytic performance in chemical reactions, such as CO oxidation and water-gas shift. It is known that the oxygen vacancies at the surface of support oxides form strong chemical bonding with the Au NPs and inhibit their coarsening and deactivation. The resulting Au/oxygen vacancy interface also acts as an active site for oxidation reactions. Hence, small Au NPs are needed to increase the density of the Au/oxide interface. A dynamic way to control the size of the Au NPs on an oxide support is desirable but has been missing in the field. Here, we demonstrate an electrochemical method to control the size of the Au NPs by controlling the surface oxygen vacancy concentration of the support oxide. Oxides with different reducibilities, La0.8Ca0.2MnO3±δ and Pr0.1Ce0.9O2-δ, are used as model support oxides. By applying the electrochemical potential, we achieve a wide range of effective oxygen pressures, pO2 (10-37-1014 atm), in the support oxides. Applying the cathodic potential creates a high concentration of oxygen vacancies and forms finely distributed Au NPs with sizes of 7-13 nm at 700-770 °C in 10 min, while the anodic potential oxidizes the surface and increases the size of the Au NPs. The onset cathodic potential required to create small Au NPs depends strongly on the reducibility of the support oxide. The Au NPs did not undergo sintering even at 700-770 °C under the cathodic potential and also were stable in catalytically relevant conditions without potential.
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Affiliation(s)
- Dongha Kim
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Georgios Dimitrakopoulos
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Bilge Yildiz
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.,Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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Monreal Corona R, Besalu E, Pla Quintana A, Poater A. A Predictive Chemistry DFT Study of the N 2O Functionalization for the Preparation of Triazolopyridine and Triazoloquinoline Scaffolds. Org Chem Front 2022. [DOI: 10.1039/d2qo00589a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The whole reaction mechanism of the functionalization of N2O for the synthesis of triazolopyridine and triazoloquinoline scaffolds has been unveiled by means of DFT calculations. The rate determining step of...
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