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Zhao M, Li C, Gómez D, Gonell F, Diaconescu VM, Simonelli L, Haro ML, Calvino JJ, Meira DM, Concepción P, Corma A. Low-temperature hydroformylation of ethylene by phosphorous stabilized Rh sites in a one-pot synthesized Rh-(O)-P-MFI zeolite. Nat Commun 2023; 14:7174. [PMID: 37935688 PMCID: PMC10630368 DOI: 10.1038/s41467-023-42938-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 10/26/2023] [Indexed: 11/09/2023] Open
Abstract
Zeolites containing Rh single sites stabilized by phosphorous were prepared through a one-pot synthesis method and are shown to have superior activity and selectivity for ethylene hydroformylation at low temperature (50 °C). Catalytic activity is ascribed to confined Rh2O3 clusters in the zeolite which evolve under reaction conditions into single Rh3+ sites. These Rh3+ sites are effectively stabilized in a Rh-(O)-P structure by using tetraethylphosphonium hydroxide as a template, which generates in situ phosphate species after H2 activation. In contrast to Rh2O3, confined Rh0 clusters appear less active in propanal production and ultimately transform into Rh(I)(CO)2 under similar reaction conditions. As a result, we show that it is possible to reduce the temperature of ethylene hydroformylation with a solid catalyst down to 50 °C, with good activity and high selectivity, by controlling the electronic and morphological properties of Rh species and the reaction conditions.
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Affiliation(s)
- Minjie Zhao
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avenida de los Naranjos s/n, 46022, Valencia, Spain
| | - Chengeng Li
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avenida de los Naranjos s/n, 46022, Valencia, Spain
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, 100029, Beijing, P. R. China
| | - Daviel Gómez
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avenida de los Naranjos s/n, 46022, Valencia, Spain
| | - Francisco Gonell
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avenida de los Naranjos s/n, 46022, Valencia, Spain
| | - Vlad Martin Diaconescu
- CELLS - ALBA Synchrotron Radiation Facility, Carrer de la Llum 2-26, 08290, Cerdanyola del Vallès, Spain
| | - Laura Simonelli
- CELLS - ALBA Synchrotron Radiation Facility, Carrer de la Llum 2-26, 08290, Cerdanyola del Vallès, Spain
| | - Miguel Lopez Haro
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica. Facultad Ciencias, Universidad de Cádiz, Campus Rio San Pedro, Puerto Real, 11510-Cádiz, Spain
| | - Jose Juan Calvino
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica. Facultad Ciencias, Universidad de Cádiz, Campus Rio San Pedro, Puerto Real, 11510-Cádiz, Spain
| | - Debora Motta Meira
- Debora CLS@APS, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois, 60439, USA
- Canadian Light Source Inc., 44 Innovation Boulevard, Saskatoon, Saskatchewan, S7N 2V3, Canada
| | - Patricia Concepción
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avenida de los Naranjos s/n, 46022, Valencia, Spain.
| | - Avelino Corma
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avenida de los Naranjos s/n, 46022, Valencia, Spain.
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Tébar-Soler C, Martin-Diaconescu V, Simonelli L, Missyul A, Perez-Dieste V, Villar-García IJ, Brubach JB, Roy P, Haro ML, Calvino JJ, Concepción P, Corma A. Low-oxidation-state Ru sites stabilized in carbon-doped RuO 2 with low-temperature CO 2 activation to yield methane. Nat Mater 2023:10.1038/s41563-023-01540-1. [PMID: 37142737 DOI: 10.1038/s41563-023-01540-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 03/22/2023] [Indexed: 05/06/2023]
Abstract
The generation of methane fuel using surplus renewable energy with CO2 as the carbon source enables both the decarbonization and substitution of fossil fuel feedstocks. However, high temperatures are usually required for the efficient activation of CO2. Here we present a solid catalyst synthesized using a mild, green hydrothermal synthesis that involves interstitial carbon doped into ruthenium oxide, which enables the stabilization of Ru cations in a low oxidation state and a ruthenium oxycarbonate phase to form. The catalyst shows an activity and selectivity for the conversion of CO2 into methane at lower temperatures than those of conventional catalysts, with an excellent long-term stability. Furthermore, this catalyst is able to operate under intermittent power supply conditions, which couples very well with electricity production systems based on renewable energies. The structure of the catalyst and the nature of the ruthenium species were acutely characterized by combining advanced imaging and spectroscopic tools at the macro and atomic scales, which highlighted the low-oxidation-state Ru sites (Run+, 0 < n < 4) as responsible for the high catalytic activity. This catalyst suggests alternative perspectives for materials design using interstitial dopants.
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Affiliation(s)
- Carmen Tébar-Soler
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Valencia, Spain
| | | | - Laura Simonelli
- CELLS-ALBA Synchrotron Radiation Facility, Cerdanyola del Vallès, Spain
| | - Alexander Missyul
- CELLS-ALBA Synchrotron Radiation Facility, Cerdanyola del Vallès, Spain
| | | | | | - Jean-Blaise Brubach
- Synchrotron SOLEIL, AILES Beamline, L'Orme des Merisiers, Saint Aubin, France
| | - Pascale Roy
- Synchrotron SOLEIL, AILES Beamline, L'Orme des Merisiers, Saint Aubin, France
| | - Miguel Lopez Haro
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Facultad Ciencias, Universidad de Cádiz, Cádiz, Spain
| | - Jose Juan Calvino
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Facultad Ciencias, Universidad de Cádiz, Cádiz, Spain
| | - Patricia Concepción
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Valencia, Spain.
| | - Avelino Corma
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Valencia, Spain.
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Gonçalves LL, Haro ML, Tagüeña-Martínez J. Relaxation in kinetic models on alternating linear chains. Phys Rev E Stat Nonlin Soft Matter Phys 2001; 63:026114. [PMID: 11308549 DOI: 10.1103/physreve.63.026114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2000] [Indexed: 05/23/2023]
Abstract
A restricted dynamics, previously introduced in a kinetic model for relaxation phenomena in linear polymer chains, is used to study the dynamic critical exponent of one-dimensional Ising models. Both an alternating isotopic chain and an alternating-bond chain are considered. In contrast with what occurs for Glauber dynamics, in these two models the dynamic critical exponent turns out to be the same. The alternating isotopic chain with the restricted dynamics is shown to lead to Nagel scaling for temperatures above some critical value. Further support is given relating the Nagel scaling to the existence of multiple (simultaneous) relaxation processes, the dynamics apparently not playing the most important role in determining such scaling.
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Affiliation(s)
- L L Gonçalves
- Departamento de Fisica, Universidade Federal do Ceará, Campus do Pici, Caixa Postal 6030, 60451-970 Fortaleza, Ceará, Brazil
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