Remiro BuenamaƱana, Sonia
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- PublicationSqueezing Out Nanoparticles from Perovskites: Controlling Exsolution with Pressure(John Wiley & Sons, 2024-11) LĆ³pez GarcĆa, AndrĆ©s; Remiro BuenamaƱana, Sonia; Neagu, Dragos; Carrillo Del Teso, Alfonso Juan; Serra Alfaro, JosĆ© Manuel; Instituto Universitario Mixto de TecnologĆa QuĆmica; Generalitat Valenciana; Agencia Estatal de InvestigaciĆ³n; FundaciĆ³ BancĆ ria Caixa d'Estalvis i Pensions de Barcelona[EN] Nanoparticle exsolution has emerged as a versatile method to functionalize oxides with robust metallic nanoparticles for catalytic and energy applications. By modifying certain external parameters during thermal reduction (temperature, time, reducing gas), some morphological and/or compositional properties of the exsolved nanoparticles can be tuned. Here, it is shown how the application of high pressure (<100 bar H2) enables the control of the exsolution of ternary FeCoNi alloyed nanoparticles from a double perovskite. H2 pressure affects the lattice expansion and the nanoparticle characteristics (size, population, and composition). The composition of the alloyed nanoparticles could be controlled, showing a reversal of the expected thermodynamic trend at 10 and 50 bar, where Fe becomes the main component instead of Ni. In addition, pressure drastically lowers the exsolution temperature to 300 degrees C, resulting in unprecedented highly-dispersed and small-sized nanoparticles with a similar composition to those obtained at 600 degrees C and 10 bar. The mechanisms behind the effects of pressure on exsolution are discussed, involving kinetic, surface thermodynamics, and lattice-strain factors. A volcano-like trend of the exsolution extent suggests that competing pressure-dependent mechanisms govern the process. Pressure emerges as a new design tool for metallic nanoparticle exsolution enabling novel nanocatalysts and surface-functionalized materials.
- PublicationInfluence of co-catalysts on the photocatalytic activity of MIL-125(Ti)-NH2 in the overall water splitting(Elsevier, 2019-10-05) Remiro BuenamaƱana, Sonia; Cabrero Antonino, MarĆa; MartĆnez-Guanter, Marcos; Ćlvaro RodrĆguez, MarĆa Mercedes; NavalĆ³n Oltra, Sergio; GarcĆa GĆ³mez, Hermenegildo; Instituto Universitario Mixto de TecnologĆa QuĆmica; Departamento de QuĆmica; Escuela TĆ©cnica Superior de IngenierĆa Industrial; Grupo de FotoquĆmica HeterogĆ©nea y Medioambiental; Generalitat Valenciana; FundaciĆ³n RamĆ³n Areces; Ministerio de EconomĆa y Competitividad[EN] Titanium containing aminoterephthalate metal organic framework promotes the photocatalytic overall water splitting into H-2 and O-2 at a rate that depends on the presence of Pt, RuOx and CoOx co-catalyst. The best values of have been obtained for the MIL-125-NH2 material that contains Pt and RuOx, reaching a production of 218 and 85 mu mol/g (-1)(photocataly)(st) at 24 h for H-2 and O-2, respectively.
- PublicationIntensification of catalytic CO2 methanation mediated by in-situ water removal through a high-temperature polymeric thin-film composite membrane(Elsevier, 2022-01) Escorihuela-Roca, Sara; CerdĆ”-Moreno, Cristina; Remiro BuenamaƱana, Sonia; Weigelt, Fynn; EscolĆ”stico RozalĆ©n, Sonia; Tena, Alberto; Shishatskiy, Sergey; Brinkmann, Torsten; Chica Lara, Antonio; Serra Alfaro, JosĆ© Manuel; Instituto Universitario Mixto de TecnologĆa QuĆmica; GVA; MINECO; Universitat PolitĆØcnica de ValĆØncia; Ministerio de EconomĆa y Competitividad; Ministerio de EconomĆa, Industria y Competitividad[EN] Catalytic CO2 methanation technology can be improved by process intensification, i.e. enabling higher energy efficiency and process sustainability. Here, thin-film composite membranes (TFCM) were developed for in-situ water removal in a catalytic membrane reactor (CMR) for the Sabatier process. The selective separation layer (1.4 mu m-thick) of the composite membrane is made of the polyimide 6FDA-6FpDA, a glassy polyimide, which exhibits high permeability and selectivity together with stable function at unprecedented high temperatures (>200 degrees C), compared to polyimides reported until now (90 degrees C), thus matching the temperature range of Sabatier reactors. Remarkably, TFCM developed in this work, allow to extract an outstanding amount of water up to 1 m(3)/(m(2).h.bar) at 260 degrees C. TFCM was implemented for the water removal from the methanation reaction in a CMR operated at 260 degrees C and using Ni-Todomkite as catalyst. The TFCM-mediated water-extraction enabled to raise both catalytic stability and activity during CMR operation. CO2 conversion stability was greatly improved exhibiting a conversion value of 72 % during the course of the reaction (21 % increase in CO2 conversion), with a water removal of 12.5 % and specific flux of similar to 100 g.h(-1) m(-)(2).
- PublicationSubphthalocyanine encapsulated within MIL-101(Cr)-NH2 as a solar light photoredox catalyst for dehalogenation of alpha-haloacetophenones(The Royal Society of Chemistry, 2019-12-28) Santiago-Portillo, Andrea; Remiro BuenamaƱana, Sonia; NavalĆ³n Oltra, Sergio; GarcĆa GĆ³mez, Hermenegildo; Instituto Universitario Mixto de TecnologĆa QuĆmica; Departamento de QuĆmica; Escuela TĆ©cnica Superior de IngenierĆa Industrial; Grupo de FotoquĆmica HeterogĆ©nea y Medioambiental; Generalitat Valenciana; FundaciĆ³n RamĆ³n Areces; Agencia Estatal de InvestigaciĆ³n[EN] Subphthalocyanine has been incorporated into a robust metal-organic framework having amino groups as binding sites. The resulting SubPc@MIL-101(Cr)-NH2 composite has a loading of 2 wt%. Adsorption of subphthalocyanine does not deteriorate host crystallinity, but decreases the surface area and porosity of MIL-101(Cr)-NH2. The resulting SubPc@MIL-101(Cr)-NH2 composite exhibits a 575 nm absorption band responsible for the observed photoredox catalytic activity under simulated sunlight irradiation for hydrogenative dehalogenation of alpha-haloacetophenones and for the coupling of alpha-bromoacetophenone and styrene. The material undergoes a slight deactivation upon reuse. In comparison to the case of phthalocyanines the present study is one of the few cases showing the use of subphthalocyanine as a photoredox catalyst, with its activity derived from site isolation within the MOF cavities.
- PublicationSingle-step hydrogen production from NH3, CH4, and biogas in stacked proton ceramic reactors(American Association for the Advancement of Science (AAAS), 2022-04-22) Clark, Daniel; Malerod-Fjeld, Harald; Budd, Michael; Yuste-Tirados, Irene; Beeaff, Dustin; Aamodt, Simen; Nguyen, Kevin; Ansaloni, Luca; Peters, Thijs; Vestre, Per K.; Pappas, Dimitrios K.; Valls-Esteve, MarĆa Inmaculada; Remiro BuenamaƱana, Sonia; Norby, Truls; Bjorheim, Tor S.; Serra Alfaro, JosĆ© Manuel; Kjolseth, Christian; Instituto Universitario Mixto de TecnologĆa QuĆmica; Gassnova; Saudi Aramco; Research Council of Norway; Ministry of Petroleum and Energy, Norway[EN] Proton ceramic reactors offer efficient extraction of hydrogen from ammonia, methane, and biogas by coupling endothermic reforming reactions with heat from electrochemical gas separation and compression. Preserving this efficiency in scale-up from cell to stack level poses challenges to the distribution of heat and gas flows and electric current throughout a robust functional design. Here, we demonstrate a 36-cell well-balanced reactor stack enabled by a new interconnect that achieves complete conversion of methane with more than 99% recovery to pressurized hydrogen, leaving a concentrated stream of carbon dioxide. Comparable cell performance was also achieved with ammonia, and the operation was confirmed at pressures exceeding 140 bars. The stacking of proton ceramic reactors into practical thermo-electrochemical devices demonstrates their potential in efficient hydrogen production.
- PublicationSingle-step hydrogen production from NH3, CH4, and biogas in stacked proton ceramic reactors (Supplementary data)(2022-04-07T13:30:45Z) Clark, Daniel; MalerĆød-Fjeld, Harald; Budd, Michael; Yuste-Tirados, Irene; Beeaff, Dustin; Aamodt, Simen; Nguyen, Kevin; Ansaloni, Luca; Peters, Thijs; Vestre, Per K.; Pappas, Dimitrios K.; Valls, MarĆa I.; Remiro BuenamaƱana, Sonia; Norby, Truls; BjĆørheim, Tor S.; Serra Jose M.; KjĆølseth, Christian; Instituto Universitario Mixto de TecnologĆa QuĆmicaThis link provide information about: 1. Single cell data 2. High-current data 3. Geometry file for modelling 4. Figure 1C data 5. SEU data