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Lado JJ, García-Quismondo E, Fombona-Pascual A, Mavrandonakis A, de la Cruz C, Oropeza FE, de la Peña O'Shea VA, de Smet LCPM, Palma J. Tuning mono-divalent cation water composition by the capacitive ion-exchange mechanism. Water Res 2024; 255:121469. [PMID: 38493740 DOI: 10.1016/j.watres.2024.121469] [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] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 03/01/2024] [Accepted: 03/12/2024] [Indexed: 03/19/2024]
Abstract
Soil salinization poses a significant challenge to agricultural activities. To address this, the agricultural industry seeks an irrigation water solution that reduces both ionic conductivity and sodium adsorption rate (SAR), thereby diminishing the risks of soil sodification and fostering sustainable crop production. Capacitive deionization (CDI) is an attractive electrochemical technology to advance this search. Recently, a one-dimensional transient CDI model unveiled a capacitive ion-exchange mechanism presenting the potential to adjust the treated water composition by modifying monovalent and divalent cation concentrations, thereby influencing the SAR index. This behavior would be achieved by using electrodes rich in surface functional groups able to efficiently capture divalent cations during conditioning and releasing them during charging while capturing monovalent ions. Beyond the theoretical modelling, the current experimental research demonstrates, for the first time, the effectiveness of the capacitive ion-exchange mechanism in a CDI pilot plant using real water samples spiked with solutions containing specific mono and divalent ions. Electrosorption experiments and computational modeling, specifically Density-Functional Theory (DFT), were used along with the analysis of the surface functional groups present in the electrodes to describe the capacitive ion-exchange phenomenon and validate the steps involved on it, highlighting the conditioning as a critical step. Various operational and flow modes confirm the versatility of CDI technology, achieving separation factors (RMg/Na) of 5-6 in batch, raising production from 0.5 to 0.8 L m-2 h-1 (batch) to 8.0-8.1 L m-2 h-1 when using single pass although reducing RMg/Na to 2. The reliability of the CDI technology in reducing SAR was also successfully tested with different influent compositions, including magnesium and calcium. Finally, the robustness of the capacitive ion-exchange mechanism was validated by a second CDI laboratory 9-cell stack cycled over 350 cycles. Our results confirm the reported theoretical model and expands the conclusions through the experiments in a pilot plant showing direct implications for employing CDI in agricultural applications.
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Affiliation(s)
- Julio J Lado
- Electrochemical Processes Unit, IMDEA Energy Institute, Avda. Ramón de la Sagra 3, Móstoles 28935, Madrid, Spain.
| | - Enrique García-Quismondo
- Electrochemical Processes Unit, IMDEA Energy Institute, Avda. Ramón de la Sagra 3, Móstoles 28935, Madrid, Spain
| | - Alba Fombona-Pascual
- Electrochemical Processes Unit, IMDEA Energy Institute, Avda. Ramón de la Sagra 3, Móstoles 28935, Madrid, Spain
| | - Andreas Mavrandonakis
- Electrochemical Processes Unit, IMDEA Energy Institute, Avda. Ramón de la Sagra 3, Móstoles 28935, Madrid, Spain
| | - Carlos de la Cruz
- Electrochemical Processes Unit, IMDEA Energy Institute, Avda. Ramón de la Sagra 3, Móstoles 28935, Madrid, Spain
| | - Freddy E Oropeza
- Photoactivated Processes Unit, IMDEA Energy Institute, Avda. Ramón de la Sagra 3, Móstoles, 28935, Madrid, Spain
| | - Victor A de la Peña O'Shea
- Photoactivated Processes Unit, IMDEA Energy Institute, Avda. Ramón de la Sagra 3, Móstoles, 28935, Madrid, Spain
| | - Louis C P M de Smet
- Advanced Interfaces & Materials, Laboratory of Organic Chemistry, Wageningen University, Stippeneng 4, Wageningen 6708 WE, the Netherlands
| | - Jesús Palma
- Electrochemical Processes Unit, IMDEA Energy Institute, Avda. Ramón de la Sagra 3, Móstoles 28935, Madrid, Spain
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2
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Bezerra LS, Belhout SA, Wang S, Quiroz J, de Oliveira PFM, Shetty S, Rocha G, Santos HLS, Frindy S, Oropeza FE, de la Peña O'Shea VA, Kallio AJ, Huotari S, Huo W, Camargo PHC. Triple Play of Band Gap, Interband, and Plasmonic Excitations for Enhanced Catalytic Activity in Pd/H xMoO 3 Nanoparticles in the Visible Region. ACS Appl Mater Interfaces 2024; 16:11467-11478. [PMID: 38382920 DOI: 10.1021/acsami.3c17101] [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] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
Plasmonic photocatalysis has been limited by the high cost and scalability of plasmonic materials, such as Ag and Au. By focusing on earth-abundant photocatalyst/plasmonic materials (HxMoO3) and Pd as a catalyst, we addressed these challenges by developing a solventless mechanochemical synthesis of Pd/HxMoO3 and optimizing photocatalytic activities in the visible range. We investigated the effect of HxMoO3 band gap excitation (at 427 nm), Pd interband transitions (at 427 nm), and HxMoO3 localized surface plasmon resonance (LSPR) excitation (at 640 nm) over photocatalytic activities toward the hydrogen evolution and phenylacetylene hydrogenation as model reactions. Although both excitation wavelengths led to comparable photoenhancements, a 110% increase was achieved under dual excitation conditions (427 + 640 nm). This was assigned to a synergistic effect of optical excitations that optimized the generation of energetic electrons at the catalytic sites. These results are important for the development of visible-light photocatalysts based on earth-abundant components.
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Affiliation(s)
- Leticia S Bezerra
- Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, PO Box 55, Helsinki 00014, Finland
| | - Samir A Belhout
- Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, PO Box 55, Helsinki 00014, Finland
| | - Shiqi Wang
- Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, PO Box 55, Helsinki 00014, Finland
| | - Jhon Quiroz
- Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, PO Box 55, Helsinki 00014, Finland
| | - Paulo F M de Oliveira
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo. Av. Lineu Prestes 748, São Paulo 05508000, Brazil
| | - Shwetha Shetty
- Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, PO Box 55, Helsinki 00014, Finland
| | - Guilherme Rocha
- Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, PO Box 55, Helsinki 00014, Finland
| | - Hugo L S Santos
- Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, PO Box 55, Helsinki 00014, Finland
| | - Sana Frindy
- Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, PO Box 55, Helsinki 00014, Finland
| | - Freddy E Oropeza
- Photoactivated Processes Unit, IMDEA Energy Institute, Avda. Ramón de la Sagra 3, Mostoles, Madrid 28935, Spain
| | - Víctor A de la Peña O'Shea
- Photoactivated Processes Unit, IMDEA Energy Institute, Avda. Ramón de la Sagra 3, Mostoles, Madrid 28935, Spain
| | - Antti-Jussi Kallio
- Department of Physics, University of Helsinki, P.O. Box 64, Helsinki 00014, Finland
| | - Simo Huotari
- Department of Physics, University of Helsinki, P.O. Box 64, Helsinki 00014, Finland
| | - Wenyi Huo
- College of Mechanical and Electrical Engineering, Nanjing Forestry University, Nanjing 210037, P. R. China
- NOMATEN Centre of Excellence, National Centre for Nuclear Research. Otwock 05-400, Poland
| | - Pedro H C Camargo
- Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, PO Box 55, Helsinki 00014, Finland
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3
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Wang H, Wang Y, Lin Y, Huang X, García-Tecedor M, de la Peña O'Shea VA, Murrill C, Lazarov VK, Oropeza FE, Zhang KHL. Impact of NiCo 2O 4/SrTiO 3 p-n Heterojunctions on the Interface of Photoelectrochemical Water Oxidation. ACS Appl Mater Interfaces 2023. [PMID: 37253189 DOI: 10.1021/acsami.3c02783] [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] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Forming semiconductor heterojunctions is a promising strategy to boost the efficiency of solar-driven photoelectrochemical (PEC) water splitting by accelerating the separation and transport of photogenerated charge carriers via an interfacial electric field. However, there is limited research considering the influence of electrolytes on the band alignment of the heterojunction under PEC conditions. In this work, we use a single crystal NiCo2O4/SrTiO3 (NCO/STO) heterojunction with atomic-precision controlled thickness as a model photoelectrode to study the band structure modulations upon getting in contact with the electrolyte and the correlation with the PEC activity. It is found that the band alignment can be tuned by the control of p-n heterojunction film thickness and regulated by the water redox potential (Eredox). When the Fermi level (EF) of the heterojunction is higher/lower than the Eredox, the band bending at the NCO/STO-electrolyte interface will increase/decrease after contacting with the electrolyte. However, when the band bending width of the NCO layer is thinner than its thickness, the electrolyte will not influence the band alignment at the NCO/STO interface. In addition, PEC characterization results show that the 1 nm NCO/STO heterojunction photoanode exhibits superior water-splitting performance, owing to the optimum band structure of the p-n heterojunction and the shorter charge transfer distance.
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Affiliation(s)
- Hongxia Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Yan Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Yumei Lin
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Xiaochun Huang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Miguel García-Tecedor
- Photoactivated Processes Unit, IMDEA Energy Institute, Avda. Ramón de la Sagra 3, 28935 Móstoles Madrid, Spain
| | - Víctor A de la Peña O'Shea
- Photoactivated Processes Unit, IMDEA Energy Institute, Avda. Ramón de la Sagra 3, 28935 Móstoles Madrid, Spain
| | - Connor Murrill
- Physics, Engineering and Technology School, University of York, Heslington, York YO10 5DD, U.K
| | - Vlado K Lazarov
- Physics, Engineering and Technology School, University of York, Heslington, York YO10 5DD, U.K
- The York JEOL Nanocentre, York Science Park, Heslington, YO10 5BR York, U.K
| | - Freddy E Oropeza
- Photoactivated Processes Unit, IMDEA Energy Institute, Avda. Ramón de la Sagra 3, 28935 Móstoles Madrid, Spain
| | - Kelvin H L Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
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4
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Del Castillo-Velilla I, Sousaraei A, Romero-Muñiz I, Castillo-Blas C, S J Méndez A, Oropeza FE, de la Peña O'Shea VA, Cabanillas-González J, Mavrandonakis A, Platero-Prats AE. Synergistic binding sites in a metal-organic framework for the optical sensing of nitrogen dioxide. Nat Commun 2023; 14:2506. [PMID: 37130858 PMCID: PMC10154382 DOI: 10.1038/s41467-023-38170-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 04/19/2023] [Indexed: 05/04/2023] Open
Abstract
Luminescent metal-organic frameworks are an emerging class of optical sensors, able to capture and detect toxic gases. Herein, we report the incorporation of synergistic binding sites in MOF-808 through post-synthetic modification with copper for optical sensing of NO2 at remarkably low concentrations. Computational modelling and advanced synchrotron characterization tools are applied to elucidate the atomic structure of the copper sites. The excellent performance of Cu-MOF-808 is explained by the synergistic effect between the hydroxo/aquo-terminated Zr6O8 clusters and the copper-hydroxo single sites, where NO2 is adsorbed through combined dispersive- and metal-bonding interactions.
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Affiliation(s)
- Isabel Del Castillo-Velilla
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Ahmad Sousaraei
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Ignacio Romero-Muñiz
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Celia Castillo-Blas
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Alba S J Méndez
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607, Hamburg, Germany
| | - Freddy E Oropeza
- Photoactivated Processes Unit, IMDEA Energy, Parque Tecnológico de Móstoles, Avenida Ramón de la Sagra 3, 28935, Móstoles, Madrid, Spain
| | - Víctor A de la Peña O'Shea
- Photoactivated Processes Unit, IMDEA Energy, Parque Tecnológico de Móstoles, Avenida Ramón de la Sagra 3, 28935, Móstoles, Madrid, Spain
| | - Juan Cabanillas-González
- Madrid Institute for Advanced Studies, IMDEA Nanociencia, c/ Faraday 9, Campus de Cantoblanco, 28049, Madrid, Spain
| | - Andreas Mavrandonakis
- Electrochemical Processes Unit, IMDEA Energy, Parque Tecnológico de Móstoles, Avda. Ramón de la Sagra 3, 28935, Móstoles, Spain.
| | - Ana E Platero-Prats
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049, Madrid, Spain.
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049, Madrid, Spain.
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain.
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5
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Alvarez-Galvan C, Lustemberg PG, Oropeza FE, Bachiller-Baeza B, Dapena Ospina M, Herranz M, Cebollada J, Collado L, Campos-Martin JM, de la Peña-O’Shea V, Alonso JA, Ganduglia-Pirovano MV. Highly Active and Stable Ni/La-Doped Ceria Material for Catalytic CO 2 Reduction by Reverse Water-Gas Shift Reaction. ACS Appl Mater Interfaces 2022; 14:50739-50750. [PMID: 36321841 PMCID: PMC9673058 DOI: 10.1021/acsami.2c11248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 10/18/2022] [Indexed: 06/16/2023]
Abstract
The design of an active, effective, and economically viable catalyst for CO2 conversion into value-added products is crucial in the fight against global warming and energy demand. We have developed very efficient catalysts for reverse water-gas shift (rWGS) reaction. Specific conditions of the synthesis by combustion allow the obtention of macroporous materials based on nanosized Ni particles supported on a mixed oxide of high purity and crystallinity. Here, we show that Ni/La-doped CeO2 catalysts─with the "right" Ni and La proportions─have an unprecedented catalytic performance per unit mass of catalyst for the rWGS reaction as the first step toward CO2 valorization. Correlations between physicochemical properties and catalytic activity, obtained using a combination of different techniques such as X-ray and neutron powder diffraction, Raman spectroscopy, in situ near ambient pressure X-ray photoelectron spectroscopy, electron microscopy, and catalytic testing, point out to optimum values for the Ni loading and the La proportion. Density functional theory calculations of elementary steps of the reaction on model Ni/ceria catalysts aid toward the microscopic understanding of the nature of the active sites. This finding offers a fundamental basis for developing economical catalysts that can be effectively used for CO2 reduction with hydrogen. A catalyst based on Ni0.07/(Ce0.9La0.1Ox)0.93 shows a CO production of 58 × 10-5 molCO·gcat-1·s-1 (700 °C, H2/CO2 = 2; selectivity to CO > 99.5), being stable for 100 h under continuous reaction.
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Affiliation(s)
| | - Pablo G. Lustemberg
- Instituto
de Catálisis y Petroleoquímica (CSIC), Cantoblanco, Madrid28049, Spain
- Instituto
de Física Rosario (IFIR), CONICET-UNR, Rosario, Santa Fe2000EZP, Argentina
| | - Freddy E. Oropeza
- Photoactivated
Processes Unit, IMDEA Energy Institute, Avda. Ramón de la Sagra 3, Móstoles, Madrid28935, Spain
| | | | - Martin Dapena Ospina
- Instituto
de Catálisis y Petroleoquímica (CSIC), Cantoblanco, Madrid28049, Spain
| | - María Herranz
- Instituto
de Catálisis y Petroleoquímica (CSIC), Cantoblanco, Madrid28049, Spain
| | - Jesús Cebollada
- Instituto
de Catálisis y Petroleoquímica (CSIC), Cantoblanco, Madrid28049, Spain
| | - Laura Collado
- Photoactivated
Processes Unit, IMDEA Energy Institute, Avda. Ramón de la Sagra 3, Móstoles, Madrid28935, Spain
| | | | - Víctor
A. de la Peña-O’Shea
- Photoactivated
Processes Unit, IMDEA Energy Institute, Avda. Ramón de la Sagra 3, Móstoles, Madrid28935, Spain
| | - José A. Alonso
- Instituto
de Ciencia de Materiales de Madrid (CSIC), Cantoblanco, Madrid28049, Spain
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6
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Wu X, Oropeza FE, den Boer D, Kleinschmidt P, Hannappel T, Hetterscheid DGH, Hensen EJM, Hofmann JP. Thermally induced oxygen vacancies in BiOCl nanosheets and their impact on photoelectrochemical performance. CHEMPHOTOCHEM 2022. [DOI: 10.1002/cptc.202200192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xiaofeng Wu
- Technical University of Darmstadt: Technische Universitat Darmstadt Materials and Earth Sciences Surface Science LaboratoryOtto-Berndt-Strasse 3 64287 Darmstadt GERMANY
| | - Freddy E. Oropeza
- IMDEA Energia: Instituto IMDEA Energia Photoactivated Processes group SPAIN
| | - Daan den Boer
- Leiden University: Universiteit Leiden Leiden Institute of Chemistry NETHERLANDS
| | - Peter Kleinschmidt
- Ilmenau University of Technology: Technische Universitat Ilmenau Physics GERMANY
| | | | | | - Emiel J. M. Hensen
- University of Technology Eindhoven: Technische Universiteit Eindhoven Chemical Engineering and Chemistry NETHERLANDS
| | - Jan Philipp Hofmann
- Technical University of Darmstadt: Technische Universitat Darmstadt Materials and Earth Sciences Surface Science LaboratoryOtto-Berndt-Strasse 3 64287 Darmstadt GERMANY
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7
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Wang H, Cui M, Fu G, Zhang J, Ding X, Azaceta I, Bugnet M, Kepaptsoglou DM, Lazarov VK, de la Peña O’Shea VA, Oropeza FE, Zhang KHL. Vertically aligned Ni/NiO nanocomposites with abundant oxygen deficient hetero-interfaces for enhanced overall water splitting. Sci China Chem 2022. [DOI: 10.1007/s11426-022-1326-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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López-García C, Canossa S, Hadermann J, Gorni G, Oropeza FE, de la Peña O'Shea VA, Iglesias M, Angeles Monge M, Gutiérrez-Puebla E, Gándara F. Heterometallic Molecular Complexes Act as Messenger Building Units to Encode Desired Metal-Atom Combinations to Multivariate Metal-Organic Frameworks. J Am Chem Soc 2022; 144:16262-16266. [PMID: 35960870 PMCID: PMC9479064 DOI: 10.1021/jacs.2c06142] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel synthetic approach is described for the targeted preparation of multivariate metal-organic frameworks (MTV-MOFs) with specific combinations of metal elements. This methodology is based on the use of molecular complexes that already comprise desired metal-atom combinations, as building units for the MTV-MOF synthesis. These units are transformed into the MOF structural constituents through a ligand/linker exchange process that involves structural modifications while preserving their originally encoded atomic combination. Thus, through the use of heterometallic ring-shaped molecules combining gallium and nickel or cobalt, we have obtained MOFs with identical combinations of the metal elements, now incorporated in the rod-shaped secondary building unit, as confirmed with a combination of X-ray and electron diffraction, electron microscopy, and X-ray absorption spectroscopy techniques.
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Affiliation(s)
- Clara López-García
- Materials Science Institute of Madrid - Spanish National Research Council (ICMM-CSIC), Calle Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - Stefano Canossa
- EMAT, Department of Physics, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Joke Hadermann
- EMAT, Department of Physics, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Giulio Gorni
- CELLS-ALBA Synchrotron, carrer de la Llum 2-26, 08290, Cerdanyola del Vallès, Barcelona Spain
| | - Freddy E Oropeza
- Photoactivated Processes Unit IMDEA Energy Institute, Móstoles Technology Park, Avenida Ramón de la Sagra 3, Móstoles, Madrid 28935, Spain
| | - Víctor A de la Peña O'Shea
- Photoactivated Processes Unit IMDEA Energy Institute, Móstoles Technology Park, Avenida Ramón de la Sagra 3, Móstoles, Madrid 28935, Spain
| | - Marta Iglesias
- Materials Science Institute of Madrid - Spanish National Research Council (ICMM-CSIC), Calle Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - M Angeles Monge
- Materials Science Institute of Madrid - Spanish National Research Council (ICMM-CSIC), Calle Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - Enrique Gutiérrez-Puebla
- Materials Science Institute of Madrid - Spanish National Research Council (ICMM-CSIC), Calle Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - Felipe Gándara
- Materials Science Institute of Madrid - Spanish National Research Council (ICMM-CSIC), Calle Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
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9
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Barawi M, Gomez-Mendoza M, Oropeza FE, Gorni G, Villar-Garcia IJ, Giménez S, de la Peña O'Shea VA, García-Tecedor M. Laser-Reduced BiVO 4 for Enhanced Photoelectrochemical Water Splitting. ACS Appl Mater Interfaces 2022; 14:33200-33210. [PMID: 35849480 DOI: 10.1021/acsami.2c07451] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The present study proposes a laser irradiation method to superficially reduce BiVO4 photoelectrodes and boost their water oxidation reaction performance. The origin of this enhanced performance toward oxygen evolution reaction (OER) was studied using a combination of a suite of structural, chemical, and mechanistic advanced characterization techniques including X-ray photoelectron (XPS), X-ray absorption spectroscopy (XAS), electrochemical impedance spectroscopy (EIS), and transient absorption spectroscopy (TAS), among others. We found that the reduction of the material is localized at the surface of the sample and that this effect creates effective n-type doping and a shift to more favorable energy band positions toward water oxidation. This thermodynamic effect, together with the change in sample morphology to larger and denser domains, results in an extended lifetime of the photogenerated carriers and improved charge extraction. In addition, the stability of the reduced sample in water was also confirmed. All of these effects result in a two-fold increase in the photocurrent density of the laser-treated samples.
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Affiliation(s)
- Mariam Barawi
- Photoactivated Processes Unit, IMDEA Energy, Avda. Ramón de La Sagra, 3, Móstoles 28935, Spain
| | - Miguel Gomez-Mendoza
- Photoactivated Processes Unit, IMDEA Energy, Avda. Ramón de La Sagra, 3, Móstoles 28935, Spain
| | - Freddy E Oropeza
- Photoactivated Processes Unit, IMDEA Energy, Avda. Ramón de La Sagra, 3, Móstoles 28935, Spain
| | - Giulio Gorni
- CLÆSS Beamline, ALBA Synchrotron, Carrer de La Llum 2-26, Cerdanyola del Valles 08290, Spain
| | - Ignacio J Villar-Garcia
- NAPP Endstation, CIRCE Beamline, ALBA Synchrotron, Carrer de La Llum 2-26, Cerdanyola del Valles 08290, Spain
| | - Sixto Giménez
- Institute of Advanced Materials (INAM), Universitat Jaume I, Avda. Vicente Sos Baynat, S/N, Castelló 12006, Spain
| | | | - Miguel García-Tecedor
- Photoactivated Processes Unit, IMDEA Energy, Avda. Ramón de La Sagra, 3, Móstoles 28935, Spain
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10
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Reñones P, Fresno F, Oropeza FE, de la Peña O’Shea VA. Improved Methane Production by Photocatalytic CO 2 Conversion over Ag/In 2O 3/TiO 2 Heterojunctions. Materials (Basel) 2022; 15:ma15030843. [PMID: 35160788 PMCID: PMC8837040 DOI: 10.3390/ma15030843] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 01/14/2022] [Accepted: 01/20/2022] [Indexed: 02/06/2023]
Abstract
In this work, the role of In2O3 in a heterojunction with TiO2 is studied as a way of increasing the photocatalytic activity for gas-phase CO2 reduction using water as the electron donor and UV irradiation. Depending on the nature of the employed In2O3, different behaviors appear. Thus, with the high crystallite sizes of commercial In2O3, the activity is improved with respect to TiO2, with modest improvements in the selectivity to methane. On the other hand, when In2O3 obtained in the laboratory, with low crystallite size, is employed, there is a further change in selectivity toward CH4, even if the total conversion is lower than that obtained with TiO2. The selectivity improvement in the heterojunctions is attributed to an enhancement in the charge transfer and separation with the presence of In2O3, more pronounced when smaller particles are used as in the case of laboratory-made In2O3, as confirmed by time-resolved fluorescence measurements. Ternary systems formed by these heterojunctions with silver nanoparticles reflect a drastic change in selectivity toward methane, confirming the role of silver as an electron collector that favors the charge transfer to the reaction medium.
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11
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Carnis J, Kshirsagar AR, Wu L, Dupraz M, Labat S, Texier M, Favre L, Gao L, Oropeza FE, Gazit N, Almog E, Campos A, Micha JS, Hensen EJM, Leake SJ, Schülli TU, Rabkin E, Thomas O, Poloni R, Hofmann JP, Richard MI. Twin boundary migration in an individual platinum nanocrystal during catalytic CO oxidation. Nat Commun 2021; 12:5385. [PMID: 34508094 PMCID: PMC8433154 DOI: 10.1038/s41467-021-25625-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Accepted: 08/23/2021] [Indexed: 02/08/2023] Open
Abstract
At the nanoscale, elastic strain and crystal defects largely influence the properties and functionalities of materials. The ability to predict the structural evolution of catalytic nanocrystals during the reaction is of primary importance for catalyst design. However, to date, imaging and characterising the structure of defects inside a nanocrystal in three-dimensions and in situ during reaction has remained a challenge. We report here an unusual twin boundary migration process in a single platinum nanoparticle during CO oxidation using Bragg coherent diffraction imaging as the characterisation tool. Density functional theory calculations show that twin migration can be correlated with the relative change in the interfacial energies of the free surfaces exposed to CO. The x-ray technique also reveals particle reshaping during the reaction. In situ and non-invasive structural characterisation of defects during reaction opens new avenues for understanding defect behaviour in confined crystals and paves the way for strain and defect engineering.
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Affiliation(s)
- Jérôme Carnis
- grid.496914.70000 0004 0385 8635Aix Marseille Université, Université de Toulon, CNRS, IM2NP, Marseille, France ,grid.5398.70000 0004 0641 6373ID01/ESRF, The European Synchrotron, Grenoble, France ,grid.7683.a0000 0004 0492 0453Present Address: Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany
| | - Aseem Rajan Kshirsagar
- grid.5676.20000000417654326Grenoble-INP, SIMaP, University of Grenoble-Alpes, CNRS, Grenoble, France
| | - Longfei Wu
- grid.496914.70000 0004 0385 8635Aix Marseille Université, Université de Toulon, CNRS, IM2NP, Marseille, France ,grid.5398.70000 0004 0641 6373ID01/ESRF, The European Synchrotron, Grenoble, France
| | - Maxime Dupraz
- grid.496914.70000 0004 0385 8635Aix Marseille Université, Université de Toulon, CNRS, IM2NP, Marseille, France ,grid.5398.70000 0004 0641 6373ID01/ESRF, The European Synchrotron, Grenoble, France
| | - Stéphane Labat
- grid.496914.70000 0004 0385 8635Aix Marseille Université, Université de Toulon, CNRS, IM2NP, Marseille, France
| | - Michaël Texier
- grid.496914.70000 0004 0385 8635Aix Marseille Université, Université de Toulon, CNRS, IM2NP, Marseille, France
| | - Luc Favre
- grid.496914.70000 0004 0385 8635Aix Marseille Université, Université de Toulon, CNRS, IM2NP, Marseille, France
| | - Lu Gao
- grid.6852.90000 0004 0398 8763Laboratory for Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Freddy E. Oropeza
- grid.6852.90000 0004 0398 8763Laboratory for Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Nimrod Gazit
- grid.6451.60000000121102151Department of Materials Science and Engineering, Technion-Israel Institute of Technology, Haifa, Israel
| | - Ehud Almog
- grid.6451.60000000121102151Department of Materials Science and Engineering, Technion-Israel Institute of Technology, Haifa, Israel
| | - Andrea Campos
- grid.5399.60000 0001 2176 4817Aix Marseille Univ, CNRS, Centrale Marseille, FSCM (FR1739), CP2M, Marseille, France
| | - Jean-Sébastien Micha
- CRG-IF BM32 beamline at the European Synchrotron (ESRF), CS40220, Grenoble Cedex 9, France
| | - Emiel J. M. Hensen
- grid.6852.90000 0004 0398 8763Laboratory for Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Steven J. Leake
- grid.5398.70000 0004 0641 6373ID01/ESRF, The European Synchrotron, Grenoble, France
| | - Tobias U. Schülli
- grid.5398.70000 0004 0641 6373ID01/ESRF, The European Synchrotron, Grenoble, France
| | - Eugen Rabkin
- grid.6451.60000000121102151Department of Materials Science and Engineering, Technion-Israel Institute of Technology, Haifa, Israel
| | - Olivier Thomas
- grid.496914.70000 0004 0385 8635Aix Marseille Université, Université de Toulon, CNRS, IM2NP, Marseille, France
| | - Roberta Poloni
- grid.5676.20000000417654326Grenoble-INP, SIMaP, University of Grenoble-Alpes, CNRS, Grenoble, France
| | - Jan P. Hofmann
- grid.6852.90000 0004 0398 8763Laboratory for Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands ,grid.6546.10000 0001 0940 1669Present Address: Surface Science Laboratory, Department of Materials and Earth Sciences, Technical University of Darmstadt, Darmstadt, Germany
| | - Marie-Ingrid Richard
- grid.496914.70000 0004 0385 8635Aix Marseille Université, Université de Toulon, CNRS, IM2NP, Marseille, France ,grid.5398.70000 0004 0641 6373ID01/ESRF, The European Synchrotron, Grenoble, France ,grid.457348.9Present Address: Univ. Grenoble Alpes, CEA Grenoble, IRIG, MEM, NRS, Grenoble, France
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12
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Oropeza FE, Dzade NY, Pons-Martí A, Yang Z, Zhang KHL, de Leeuw NH, Hensen EJM, Hofmann JP. Electronic Structure and Interface Energetics of CuBi 2O 4 Photoelectrodes. J Phys Chem C Nanomater Interfaces 2020; 124:22416-22425. [PMID: 33193938 PMCID: PMC7659311 DOI: 10.1021/acs.jpcc.0c08455] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Indexed: 05/03/2023]
Abstract
CuBi2O4 exhibits significant potential for the photoelectrochemical (PEC) conversion of solar energy into chemical fuels, owing to its extended visible-light absorption and positive flat band potential vs the reversible hydrogen electrode. A detailed understanding of the fundamental electronic structure and its correlation with PEC activity is of significant importance to address limiting factors, such as poor charge carrier mobility and stability under PEC conditions. In this study, the electronic structure of CuBi2O4 has been studied by a combination of hard X-ray photoemission spectroscopy, resonant photoemission spectroscopy, and X-ray absorption spectroscopy (XAS) and compared with density functional theory (DFT) calculations. The photoemission study indicates that there is a strong Bi 6s-O 2p hybrid electronic state at 2.3 eV below the Fermi level, whereas the valence band maximum (VBM) has a predominant Cu 3d-O 2p hybrid character. XAS at the O K-edge supported by DFT calculations provides a good description of the conduction band, indicating that the conduction band minimum is composed of unoccupied Cu 3d-O 2p states. The combined experimental and theoretical results suggest that the low charge carrier mobility for CuBi2O4 derives from an intrinsic charge localization at the VBM. Also, the low-energy visible-light absorption in CuBi2O4 may result from a direct but forbidden Cu d-d electronic transition, leading to a low absorption coefficient. Additionally, the ionization potential of CuBi2O4 is higher than that of the related binary oxide CuO or that of NiO, which is commonly used as a hole transport/extraction layer in photoelectrodes. This work provides a solid electronic basis for topical materials science approaches to increase the charge transport and improve the photoelectrochemical properties of CuBi2O4-based photoelectrodes.
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Affiliation(s)
- Freddy E. Oropeza
- Laboratory
of Inorganic Materials and Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
- IMDEA
Energy Institute, Avenida
Ramón de la Sagra, 3, 28935 Móstoles, MadridSpain
- F.E.O.
| | - Nelson Y. Dzade
- School
of Chemistry, Cardiff University, Main Building, Park Place, CF10 3AT Cardiff, U.K.
| | - Amalia Pons-Martí
- Laboratory
of Inorganic Materials and Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Zhenni Yang
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, College of
Chemistry and Chemical Engineering, Xiamen
University, Xiamen 361005, P.R. China
| | - Kelvin H. L. Zhang
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, College of
Chemistry and Chemical Engineering, Xiamen
University, Xiamen 361005, P.R. China
| | - Nora H. de Leeuw
- School
of Chemistry, Cardiff University, Main Building, Park Place, CF10 3AT Cardiff, U.K.
- School
of Chemistry, University of Leeds, Leeds LS2 9JT, U.K.
- Department
of Earth Sciences, Utrecht University, Princetonlaan 8a, 3584 CB Utrecht, The Netherlands
| | - Emiel J. M. Hensen
- Laboratory
of Inorganic Materials and Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Jan P. Hofmann
- Laboratory
of Inorganic Materials and Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
- Surface Science
Laboratory, Department of Materials and Earth Sciences, Technical University of Darmstadt, Otto-Berndt-Strasse 3, 64287 Darmstadt, Germany
- J.P.H.
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13
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López-Calixto CG, Barawi M, Gomez-Mendoza M, Oropeza FE, Fresno F, Liras M, de la Peña O'Shea VA. Hybrids Based on BOPHY-Conjugated Porous Polymers as Photocatalysts for Hydrogen Production: Insight into the Charge Transfer Pathway. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01346] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Carmen G. López-Calixto
- Photoactivated Processes Unit, IMDEA Energy, Avda. Ramón de la Sagra, 3, 28935 Móstoles, Madrid, Spain
| | - Mariam Barawi
- Photoactivated Processes Unit, IMDEA Energy, Avda. Ramón de la Sagra, 3, 28935 Móstoles, Madrid, Spain
| | - Miguel Gomez-Mendoza
- Photoactivated Processes Unit, IMDEA Energy, Avda. Ramón de la Sagra, 3, 28935 Móstoles, Madrid, Spain
| | - Freddy E. Oropeza
- Photoactivated Processes Unit, IMDEA Energy, Avda. Ramón de la Sagra, 3, 28935 Móstoles, Madrid, Spain
| | - Fernando Fresno
- Photoactivated Processes Unit, IMDEA Energy, Avda. Ramón de la Sagra, 3, 28935 Móstoles, Madrid, Spain
| | - Marta Liras
- Photoactivated Processes Unit, IMDEA Energy, Avda. Ramón de la Sagra, 3, 28935 Móstoles, Madrid, Spain
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14
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Reñones P, Collado L, Iglesias-Juez A, Oropeza FE, Fresno F, de la Peña O’Shea VA. Silver–Gold Bimetal-Loaded TiO2 Photocatalysts for CO2 Reduction. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c01034] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Patricia Reñones
- Photoactivated Processes Unit, IMDEA Energy Institute, Parque Tecnológico de Móstoles, Avda. Ramón de la Sagra 3, 28935 Móstoles, Madrid, Spain
- Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, C/Tulipán s/n, 28933 Móstoles, Madrid, Spain
| | - Laura Collado
- Photoactivated Processes Unit, IMDEA Energy Institute, Parque Tecnológico de Móstoles, Avda. Ramón de la Sagra 3, 28935 Móstoles, Madrid, Spain
- Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, C/Tulipán s/n, 28933 Móstoles, Madrid, Spain
| | - Ana Iglesias-Juez
- Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049 Madrid, Spain
| | - Freddy E. Oropeza
- Photoactivated Processes Unit, IMDEA Energy Institute, Parque Tecnológico de Móstoles, Avda. Ramón de la Sagra 3, 28935 Móstoles, Madrid, Spain
| | - Fernando Fresno
- Photoactivated Processes Unit, IMDEA Energy Institute, Parque Tecnológico de Móstoles, Avda. Ramón de la Sagra 3, 28935 Móstoles, Madrid, Spain
| | - Víctor A. de la Peña O’Shea
- Photoactivated Processes Unit, IMDEA Energy Institute, Parque Tecnológico de Móstoles, Avda. Ramón de la Sagra 3, 28935 Móstoles, Madrid, Spain
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15
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Ding X, Li W, Kuang H, Qu M, Cui M, Zhao C, Qi DC, Oropeza FE, Zhang KHL. An Fe stabilized metallic phase of NiS 2 for the highly efficient oxygen evolution reaction. Nanoscale 2019; 11:23217-23225. [PMID: 31782464 DOI: 10.1039/c9nr07832k] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This work reports a fundamental study on the relationship of the electronic structure, catalytic activity and surface reconstruction process of Fe doped NiS2 (FexNi1-xS2) for the oxygen evolution reaction (OER). A combined photoemission and X-ray absorption spectroscopic study reveals that Fe doping introduces more occupied Fe 3d6 states at the top of the valence band and thereby induces a metallic phase. Meanwhile, Fe doping also significantly increases the OER activity and results in much better stability with the optimum found for Fe0.1Ni0.9S2. More importantly, we performed detailed characterization to track the evolution of the structure and composition of the catalysts after different cycles of OER testing. Our results further confirmed that the catalysts gradually transform into amorphous (oxy)hydroxides which are the actual active species for the OER. However, a fast phase transformation in NiS2 is accompanied by a decrease of OER activity, because of the formation of a thick insulating NiOOH layer limiting electron transfer. On the other hand, Fe doping retards the process of transformation, because of a shorter Fe-S bond length (2.259 Å) than Ni-S (2.400 Å), explaining the better electrochemical stability of Fe0.1Ni0.9S2. These results suggest that the formation of a thin surface layer of NiFe (oxy)hydroxide as an active OER catalyst and the remaining Fe0.1Ni0.9S2 as a conductive core for fast electron transfer is the base for the high OER activity of FexNi1-xS2. Our work provides important insight and design principle for metal chalcogenides as highly active OER catalysts.
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Affiliation(s)
- Xingyu Ding
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P.R. China.
| | - Weiwei Li
- Department of Materials Science & Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK
| | - Haipeng Kuang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P.R. China.
| | - Mei Qu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P.R. China.
| | - Meiyan Cui
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P.R. China.
| | - Chenhao Zhao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P.R. China.
| | - Dong-Chen Qi
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland 4001, Australia
| | - Freddy E Oropeza
- Laboratory of Inorganic Materials Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P. O. Box 513, 5600MB Eindhoven, The Netherlands.
| | - Kelvin H L Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P.R. China.
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16
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Garcia-Torregrosa I, Wijten JHJ, Zanoni S, Oropeza FE, Hofmann JP, Hensen EJM, Weckhuysen BM. Template-Free Nanostructured Fluorine-Doped Tin Oxide Scaffolds for Photoelectrochemical Water Splitting. ACS Appl Mater Interfaces 2019; 11:36485-36496. [PMID: 31523952 PMCID: PMC6790916 DOI: 10.1021/acsami.9b05176] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 09/16/2019] [Indexed: 06/10/2023]
Abstract
The synthesis and characterization of highly stable and conductive F:SnO2 (FTO) nanopyramid arrays are investigated, and their use as scaffolds for water splitting is demonstrated. Current densities during the oxygen evolution reaction with a NiFeOx catalyst at 2 V vs reversible hydrogen electrode were increased 5-fold when substituting commercial FTO (TEC 15) by nanostructured FTO scaffolds. In addition, thin α-Fe2O3 films (∼50 nm thick) were employed as a proof of concept to show the effect of our nanostructured scaffolds during photoelectrochemical water splitting. Double-layer capacitance measurements showed a drastic increase of the relative electrochemically active surface area for the nanostructured samples, in agreement with the observed photocurrent enhancement, whereas UV-vis spectroscopy indicates full absorption of visible light at wavelengths below 600 nm.
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Affiliation(s)
- Ivan Garcia-Torregrosa
- Inorganic Chemistry
and Catalysis Group, Debye Institute for Nanomaterials Science, Faculty
of Science, Utrecht University, Universiteitsweg 99, 3584 CA Utrecht, The Netherlands
| | - Jochem H. J. Wijten
- Inorganic Chemistry
and Catalysis Group, Debye Institute for Nanomaterials Science, Faculty
of Science, Utrecht University, Universiteitsweg 99, 3584 CA Utrecht, The Netherlands
| | - Silvia Zanoni
- Inorganic Chemistry
and Catalysis Group, Debye Institute for Nanomaterials Science, Faculty
of Science, Utrecht University, Universiteitsweg 99, 3584 CA Utrecht, The Netherlands
| | - Freddy E. Oropeza
- Laboratory for Inorganic Materials and
Catalysis, Department of Chemistry and Chemical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Jan P. Hofmann
- Laboratory for Inorganic Materials and
Catalysis, Department of Chemistry and Chemical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Emiel J. M. Hensen
- Laboratory for Inorganic Materials and
Catalysis, Department of Chemistry and Chemical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Bert M. Weckhuysen
- Inorganic Chemistry
and Catalysis Group, Debye Institute for Nanomaterials Science, Faculty
of Science, Utrecht University, Universiteitsweg 99, 3584 CA Utrecht, The Netherlands
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17
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van Oversteeg CM, Oropeza FE, Hofmann JP, Hensen EJM, de Jongh PE, de Mello Donega C. Water-Dispersible Copper Sulfide Nanocrystals via Ligand Exchange of 1-Dodecanethiol. Chem Mater 2019; 31:541-552. [PMID: 30686859 PMCID: PMC6345102 DOI: 10.1021/acs.chemmater.8b04614] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 12/18/2018] [Indexed: 05/16/2023]
Abstract
In colloidal Cu2-x S nanocrystal synthesis, thiols are often used as organic ligands and the sulfur source, as they yield high-quality nanocrystals. However, thiol ligands on Cu2-x S nanocrystals are difficult to exchange, limiting the applications of these nanocrystals in photovoltaics, biomedical sensing, and photocatalysis. Here, we present an effective and facile procedure to exchange native 1-dodecanethiol on Cu2-x S nanocrystals by 3-mercaptopropionate, 11-mercaptoundecanoate, and S2- in formamide under inert atmosphere. The product hydrophilic Cu2-x S nanocrystals have excellent colloidal stability in formamide. Furthermore, the size, shape, and optical properties of the nanocrystals are not significantly affected by the ligand exchange. Water-dispersible Cu2-x S nanocrystals are easily obtained by precipitation of the nanocrystals capped by S2-, 3-mercaptopropionate, or 11-mercaptoundecanoate from formamide, followed by redispersion in water. Interestingly, the ligand exchange rates for Cu2-x S nanocrystals capped with 1-dodecanethiol are observed to depend on the preparation method, being much slower for Cu2-x S nanocrystals prepared through heating-up than through hot-injection synthesis protocols. XPS studies reveal that the differences in the ligand exchange rates are due to the surface chemistry of the Cu2-x S nanocrystals, where the nanocrystals prepared via hot-injection synthesis have a less dense ligand layer due to the presence of trioctylphosphine oxide during synthesis. A model is proposed that explains the observed differences in the ligand exchange rates. The facile ligand exchange procedures reported here enable the use of high-quality colloidal Cu2-x S nanocrystals prepared in the presence of 1-dodecanethiol in various applications.
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Affiliation(s)
- Christina
H. M. van Oversteeg
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
- Inorganic
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Freddy E. Oropeza
- Laboratory
of Inorganic Materials Chemistry, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, Postbox 513, 5600 MB Eindhoven, The Netherlands
| | - Jan P. Hofmann
- Laboratory
of Inorganic Materials Chemistry, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, Postbox 513, 5600 MB Eindhoven, The Netherlands
| | - Emiel J. M. Hensen
- Laboratory
of Inorganic Materials Chemistry, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, Postbox 513, 5600 MB Eindhoven, The Netherlands
| | - Petra E. de Jongh
- Inorganic
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Celso de Mello Donega
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
- (Celso de Mello Donega) E-mail:
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18
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Geonmonond RS, Quiroz J, Rocha GFSR, Oropeza FE, Rangel CJ, Rodrigues TS, Hofmann JP, Hensen EJM, Ando RA, Camargo PHC. Marrying SPR excitation and metal-support interactions: unravelling the contribution of active surface species in plasmonic catalysis. Nanoscale 2018; 10:8560-8568. [PMID: 29694475 DOI: 10.1039/c8nr00934a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Plasmonic catalysis takes advantage of the surface plasmon resonance (SPR) excitation to drive or accelerate chemical transformations. In addition to the plasmonic component, the control over metal-support interactions in these catalysts is expected to strongly influence the performances. For example, CeO2 has been widely employed towards oxidation reactions due to its oxygen mobility and storage properties, which allow for the formation of Ce3+ sites and adsorbed oxygen species from metal-support interactions. It is anticipated that these species may be activated by the SPR excitation and contribute to the catalytic activity of the material. Thus, a clear understanding of the role played by the SPR-mediated activation of surface oxide species at the metal-support interface is needed in order to take advantage of this phenomenon. Herein, we describe and quantify the contribution from active surface oxide species at the metal-support interface (relative to O2 from air) to the activities in green SPR-mediated oxidation reactions. We employed CeO2 decorated with Au NPs (Au/CeO2) as a model plasmonic catalyst and the oxidation of p-aminothiophenol (PATP) and aniline as proof-of-concept transformations. We compared the results with SiO2 decorated with Au NPs (Au/SiO2), in which the formation of surface oxide species at the metal-support interface is not expected. We found that the SPR-mediated activation of surface oxide species at the metal-support interface in Au/CeO2 played a pivotal role in the detected activities, being even higher than the contribution coming from the activation of O2 from air.
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Affiliation(s)
- Rafael S Geonmonond
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000, São Paulo-SP, Brazil.
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19
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Zhang KHL, Wu R, Tang F, Li W, Oropeza FE, Qiao L, Lazarov VK, Du Y, Payne DJ, MacManus-Driscoll JL, Blamire MG. Electronic Structure and Band Alignment at the NiO and SrTiO 3 p-n Heterojunctions. ACS Appl Mater Interfaces 2017; 9:26549-26555. [PMID: 28695740 DOI: 10.1021/acsami.7b06025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Understanding the energetics at the interface, including the alignment of valence and conduction bands, built-in potentials, and ionic and electronic reconstructions, is an important challenge in designing oxide interfaces that have controllable multifunctionalities for novel (opto-)electronic devices. In this work, we report detailed investigations on the heterointerface of wide-band-gap p-type NiO and n-type SrTiO3 (STO). We show that despite a large lattice mismatch (∼7%) and dissimilar crystal structure, high-quality NiO and Li-doped NiO (LNO) thin films can be epitaxially grown on STO(001) substrates through a domain-matching epitaxy mechanism. X-ray photoelectron spectroscopy studies indicate that NiO/STO heterojunctions form a type II "staggered" band alignment. In addition, a large built-in potential of up to 0.97 eV was observed at the interface of LNO and Nb-doped STO (NbSTO). The LNO/NbSTO p-n heterojunctions exhibit not only a large rectification ratio of 2 × 103 but also a large ideality factor of 4.3. The NiO/STO p-n heterojunctions have important implications for applications in photocatalysis and photodetectors as the interface provides favorable energetics for facile separation and transport of photogenerated electrons and holes.
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Affiliation(s)
- Kelvin H L Zhang
- Department of Materials Science & Metallurgy, University of Cambridge , 27 Charles Babbage Road, Cambridge CB3 0FS, U.K
| | - Rui Wu
- Department of Materials Science & Metallurgy, University of Cambridge , 27 Charles Babbage Road, Cambridge CB3 0FS, U.K
| | - Fengzai Tang
- Department of Materials Science & Metallurgy, University of Cambridge , 27 Charles Babbage Road, Cambridge CB3 0FS, U.K
| | - Weiwei Li
- Department of Materials Science & Metallurgy, University of Cambridge , 27 Charles Babbage Road, Cambridge CB3 0FS, U.K
| | - Freddy E Oropeza
- Department of Materials, Imperial College London , Exhibition Road, London SW7 2AZ, U.K
| | - Liang Qiao
- School of Materials, The University of Manchester , Manchester M13 9PL, U.K
| | - Vlado K Lazarov
- Department of Physics, University of York , Heslington, York YO10 5DD, U.K
| | - Yingge Du
- Physical Sciences Division, Physical & Computational Sciences Directorate, Pacific Northwest National Laboratory , Richland, Washington 99352, United States
| | - David J Payne
- Department of Materials, Imperial College London , Exhibition Road, London SW7 2AZ, U.K
| | - Judith L MacManus-Driscoll
- Department of Materials Science & Metallurgy, University of Cambridge , 27 Charles Babbage Road, Cambridge CB3 0FS, U.K
| | - Mark G Blamire
- Department of Materials Science & Metallurgy, University of Cambridge , 27 Charles Babbage Road, Cambridge CB3 0FS, U.K
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Kahk JM, Poll CG, Oropeza FE, Ablett JM, Céolin D, Rueff JP, Agrestini S, Utsumi Y, Tsuei KD, Liao YF, Borgatti F, Panaccione G, Regoutz A, Egdell RG, Morgan BJ, Scanlon DO, Payne DJ. Understanding the electronic structure of IrO2 using hard-X-ray photoelectron spectroscopy and density-functional theory. Phys Rev Lett 2014; 112:117601. [PMID: 24702416 DOI: 10.1103/physrevlett.112.117601] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Indexed: 05/27/2023]
Abstract
The electronic structure of IrO2 has been investigated using hard x-ray photoelectron spectroscopy and density-functional theory. Excellent agreement is observed between theory and experiment. We show that the electronic structure of IrO2 involves crystal field splitting of the iridium 5d orbitals in a distorted octahedral field. The behavior of IrO2 closely follows the theoretical predictions of Goodenough for conductive rutile-structured oxides [J. B. Goodenough, J. Solid State Chem. 3, 490 (1971).
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Affiliation(s)
- J M Kahk
- Department of Materials, Imperial College London, Exhibition Road, London SW7 2AZ, United Kingdom
| | - C G Poll
- Department of Materials, Imperial College London, Exhibition Road, London SW7 2AZ, United Kingdom
| | - F E Oropeza
- Department of Materials, Imperial College London, Exhibition Road, London SW7 2AZ, United Kingdom
| | - J M Ablett
- Synchrotron SOLEIL, L'Orme des Merisiers, BP 48 Saint-Aubin, 91192 Gif-sur-Yvette, France
| | - D Céolin
- Synchrotron SOLEIL, L'Orme des Merisiers, BP 48 Saint-Aubin, 91192 Gif-sur-Yvette, France
| | - J-P Rueff
- Synchrotron SOLEIL, L'Orme des Merisiers, BP 48 Saint-Aubin, 91192 Gif-sur-Yvette, France
| | - S Agrestini
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzerstr. 40, 01187 Dresden, Germany
| | - Y Utsumi
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzerstr. 40, 01187 Dresden, Germany
| | - K D Tsuei
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu 30077, Taiwan
| | - Y F Liao
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu 30077, Taiwan
| | - F Borgatti
- Consiglio Nazionale delle Ricerche, Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN), via P. Gobetti n.101, I-40129 Bologna, Italy
| | - G Panaccione
- Istituto Officina dei Materiali (IOM)-CNR, Laboratorio TASC, in Area Science Park, S.S.14, Km 163.5, I-34149 Trieste, Italy
| | - A Regoutz
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - R G Egdell
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - B J Morgan
- Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom
| | - D O Scanlon
- University College London, Kathleen Lonsdale Materials Chemistry, Department of Chemistry, 20 Gordon Street, London WC1H 0AJ, United Kingdom and Diamond Light Source Ltd., Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, United Kingdom
| | - D J Payne
- Department of Materials, Imperial College London, Exhibition Road, London SW7 2AZ, United Kingdom
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21
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Zhang KHL, Lazarov VK, Veal TD, Oropeza FE, McConville CF, Egdell RG, Walsh A. Thickness dependence of the strain, band gap and transport properties of epitaxial In2O3 thin films grown on Y-stabilised ZrO2(111). J Phys Condens Matter 2011; 23:334211. [PMID: 21813945 DOI: 10.1088/0953-8984/23/33/334211] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Epitaxial films of In(2)O(3) have been grown on Y-stabilised ZrO(2)(111) substrates by molecular beam epitaxy over a range of thicknesses between 35 and 420 nm. The thinnest films are strained, but display a 'cross-hatch' morphology associated with a network of misfit dislocations which allow partial accommodation of the lattice mismatch. With increasing thickness a 'dewetting' process occurs and the films break up into micron sized mesas, which coalesce into continuous films at the highest coverages. The changes in morphology are accompanied by a progressive release of strain and an increase in carrier mobility to a maximum value of 73 cm(2) V(-1) s(-1). The optical band gap in strained ultrathin films is found to be smaller than for thicker films. Modelling of the system, using a combination of classical pair-wise potentials and ab initio density functional theory, provides a microscopic description of the elastic contributions to the strained epitaxial growth, as well as the electronic effects that give rise to the observed band gap changes. The band gap increase induced by the uniaxial compression is offset by the band gap reduction associated with the epitaxial tensile strain.
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Affiliation(s)
- K H L Zhang
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK
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Oropeza FE, Davies B, Palgrave RG, Egdell RG. Electronic basis of visible region activity in high area Sn-doped rutile TiO2 photocatalysts. Phys Chem Chem Phys 2011; 13:7882-91. [DOI: 10.1039/c0cp02639e] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Oropeza FE, Harmer J, Egdell RG, Palgrave RG. A critical evaluation of the mode of incorporation of nitrogen in doped anatase photocatalysts. Phys Chem Chem Phys 2010; 12:960-9. [DOI: 10.1039/b914733k] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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