Aitor Hornes

Aitor Hornes
IREC Catalonia Institute for Energy Research | IREC · Department of Advanced Materials for Energy

PhD

About

33
Publications
3,677
Reads
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1,141
Citations
Citations since 2017
8 Research Items
506 Citations
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2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
Introduction
My research interests are in the field of Energy generation devices, i.e. Fuel Cells, and the development of efficient catalytic materials for energy production and storage. Currently, I am involved in Cell3Ditor project aiming for the development of multi-material 3D printed SOFC stacks.
Additional affiliations
November 2014 - present
IREC Catalonia Institute for Energy Research
Position
  • Researcher
September 2012 - September 2014
German Aerospace Center (DLR)
Position
  • PostDoc Position
September 2012 - October 2014
German Aerospace Center (DLR)
Position
  • Researcher

Publications

Publications (33)
Article
3D printing technologies are being called on to revolutionize the manufacturing industry of the energy sector, especially when involving functional materials and complete devices. These additive manufacturing technologies show competitive advantages over conventional processes, however only a few studies have assessed their environmental implicatio...
Chapter
Fuel cell and electrolysis systems are highly efficient energy technologies based on hydrogen for clean power generation and chemical storage, respectively. This chapter reviews the existing literature and prospecting future advances of the use of 3D printing technologies for fuel cell and electrolysis systems. Solid oxide cells are ceramic‐based e...
Article
Full-text available
3D printing of functional materials will revolutionize the energy sector by introducing complex shapes and novel functionalities never explored before. This will give rise to the next generation of enhanced devices ready for mass customization. Among others, electroceramic-based energy devices like Solid Oxide Fuel and Electrolysis Cells are promis...
Article
Mesoporous ceria possesses high potential as a functional material for high-temperature energy applications, owing to an ordered percolating network for oxygen ion conductivity, to a good catalytic activity towards solid/gas reactions and to a maximized porosity in the nanometric range. Here we developed highly performing gadolinium-doped mesoporou...
Article
Ion transport in solid-state devices is of great interest for current and future energy and information technologies. A superior enhancement of several orders of magnitude of the oxygen diffusivity has been recently reported for grain boundaries in lanthanum-strontium manganites. However, the significance and extent of this unique phenomenon are no...
Article
The degradation mechanism of micro-tubular Solid oxide fuel cells (mSOFC) has been studied as a function of the fuel utilization (FU from 40 to 80%) along the tube (inlet, center and outlet). La0.6Sr0.4Co0.5Fe0.5O3/Sm0.2Ce0.8O2/8YSZ/Ni-YSZ pristine cells undergone to different galvanostatic tests were carefully characterized by Raman spectroscopy a...
Article
This work evaluates the relevance of the carrier gas in the performance of micro-tubular SOFCs and describes its role in improving the fuel cell efficiency of these systems. Initial dual operation mode analyses revealed a strong influence of the carrier gas flow on the fuel cell degradation rate, showing a higher degradation rate when low fuel util...
Article
In the present contribution, we combine modeling and experimental study of electrochemical hydrogen oxidation at an alternative perovskite based mixed-conducting SOFC anode. Composite electrodes were produced by conventional wet ceramic processing (screen printing – spraying) and sintering on YSZ electrolytes (La0.1Sr0.9TiO3-α-Ce1-xGdxO2-α|YSZ) wit...
Conference Paper
The current paper reports self-healing plasma sprayed Mgspinel (MgAl2O4) coatings. The coatings were used for electrical insulation in high temperature fuel cells. A range of potential self-healing additives consisting of SiC+X (where X was BaO, CaO, ZnO, Y2O3, GeO2, Ta2O5, V2O5) were characterized and SiC+Y2O3 was initially selected for coating de...
Article
Ni/YSZ composite materials have shown the tremendous success over past years for application as SOFC anodes. One of the biggest advantages of Ni/YSZ SOFC anode is its ability of direct utilization of various fuel types, i.e. H 2 /H 2 O, CO/CO 2 and hydrocarbons. It is, however, well known that operation of those anodes upon various fuels could caus...
Conference Paper
This work investigates the impact of the exposition to SOFC anode operating conditions on SrTiO3-based compounds, with A-site or B-site substitution: 10 at.% lanthanum or 20 at.% niobium, respectively. Structural and surface stability of the materials after the reaction was examined (post-mortem analysis) using X-ray diffraction (XRD) and X-ray pho...
Article
A CuNi-CeO2/YSZ/LSF solid oxide fuel cell has been fabricated and tested with respect to its electrochemical activity for direct oxidation of dry methane. The electrodes have been prepared by impregnation of corresponding porous YSZ layers, using reverse microemulsions as impregnating medium for the anode (constituted by Cu-Ni at 1:1 atomic ratio i...
Article
Full-text available
This article reviews work done at authors' laboratories about catalysts based on combinations between copper and ceria for preferential oxidation of CO in H-2-rich streams (CO-PROX). The main focus of this review is the characterization of active sites for the process on the basis of spectroscopic analysis of the systems under reaction conditions (...
Article
A brief review of the status of fuel cell technology for use in the transport sector and power generation is presented. This chapter briefly describes these applications and their special requirements, technical and price objectives to be met prior to large commercialization, as well as the current market status and prospective. A brief summary of...
Article
a b s t r a c t Two catalysts combining Cu–Ni with CeO 2 and Gd-doped CeO 2 , respectively, are comparatively exam-ined with respect to redox and catalytic properties towards interaction with CH 4 . For this, catalysts in oxidised starting states are explored by means of CH 4 -TPR tests up to 973 K. Characterization of ini-tial and final states of...
Article
The present work analyses bimetallic Cu-Fe formulations combined with CeO2 or other structurally related mixed oxides resulting from doping of the former with Gd or Tb, focusing to its possible use as anodes of solid oxide fuel cells (SOFC) for direct oxidation of methane. The main objective is the characterization of the various formulations at st...
Article
A series of catalysts based on combinations between copper and cerium oxides, in which the former has been modified by doping with Co, Zn and Sn, have been prepared by a microemulsion method and characterized by XRD and SBET measurements. Their catalytic activity as well as details of redox processes taking place during the course of the reaction h...
Article
An inverse powder system composed of CeO2 nanoparticles dispersed over a CuO−Cu matrix is proposed as a novel catalyst for the water−gas shift reaction. This inverse CeO2/CuO−Cu catalyst exhibits a higher activity than standard Cu/CeO2 catalysts. In situ synchrotron characterization techniques were employed to follow the structural changes of CeO2/...
Article
Full-text available
Molten Sn and Bi were examined at 973 and 1073 K for use as anodes in solid oxide fuel cells with yttria-stabilized zirconia (YSZ) electrolytes. Cells were operated under "battery" conditions, with dry He flow in the anode compartment, to characterize the electrochemical oxidation of the metals at the YSZ interface. For both metals, the open-circui...
Article
Catalysts of copper oxide supported on CeO2 and Ce1−xTbxO2−y have been studied by temperature-programmed reduction employing CO as a reductant (CO-TPR) using a diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) cell as well as conventional tubular reactors in order to get insights into redox changes occurring in the course of inte...
Article
A novel inverse CeO(2)/CuO catalyst for preferential oxidation of CO in H(2)-rich stream (CO-PROX) has been developed on the basis of a hypothesis extracted from previous work of the group (JACS 2007, 129, 12064). Possible separation of the two competing oxidation reactions involved in the process (of CO and H(2), respectively) is the key to modula...
Article
A series of oxidised copper-ceria catalysts with varying copper loadings and prepared by two different methods (impregnation of ceria and coprecipitation of the two components within reverse microemulsions) have been examined with the aim of determining the nature of active entities for the two main (CO and H2) competing oxidation reactions that ta...
Article
Full-text available
a b s t r a c t The present work analyses bimetallic Cu–Ni formulations, in comparison to monometallic Cu ones, com-bined with CeO 2 or other structurally related mixed oxides resulting from doping of the former with Gd or Tb, focusing to its possible use as anodes of solid oxide fuel cells (SOFC) for direct oxidation of methane. The main objective...
Article
A ceria-supported copper oxide catalyst has been examined with respect to interaction with CO by means of CO-TPR tests employing a DRIFTS cell as reactor. Parallel analysis of isotopic shifts in the DRIFTS spectra obtained upon interaction of the catalysts with either 12 CO or 13 CO allows unambiguous assignment of the various carbonyl and carbonat...
Article
Four nanostructured oxidised copper-cerium catalysts prepared by two different methods (impregnation of ceria and coprecipitation of the two components within reverse microemulsions) with varying copper loadings have been examined with the aim of establishing correlations between redox and catalytic properties for preferential oxidation of CO in H2...
Article
Full-text available
CuFe-Ce 0.9 Gd 0.1 O 2-δ (CF-CG) was prepared in order to explore its potential as anode material for Intermediate Temperature Fuel Cell (IT-SOFC) for direct oxidation of methane. In this work, the catalytic activity, the thermal expansion coefficient, the morphology, the electrical conductivity and the chemical compatibility of this anode material...
Article
Nanostructured catalysts based on combinations between oxidised copper and cerium entities prepared by two different methods (impregnation of ceria and coprecipitation of the two components within reverse microemulsions) have been examined with respect to their catalytic performance for preferential oxidation of CO in a H2-rich stream (CO-PROX). Co...
Article
The present contribution analyses the possibilities of both Cu and bimetallic Cu-Ni formulations combined with CeO2-based oxides for their use as anodes of solid-oxide fuel cells (SOFC) for direct oxidation of methane. The main objective is related to examining how the metals combination and the presence of dopants like Gd and Tb into the ceria str...
Article
Tesis doctoral inédita. Universidad Autónoma de Madrid, Facultad de Ciencias, Departamento de Química Física Aplicada. Fecha de lectura: 17-12-2010

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Projects

Projects (4)
Archived project
SAFARI aims to design, optimise and build 5 100We SOFC stacks, and to integrate then into 2 truck cab power systems comprising both rapid heating planar SOFC from ALM and microtubular SOFC from ADE, together with a battery and appliances found in a modern truck manufactured by IVECO. Additional components of the system are a gas processor to clean up the molecules from liquefied natural gas (LNG) plus other equipment for Balance of Plant (BoP) and heater/chiller. All these components will be constituents of a fuel cell unit which will first be tested in the lab and , after further miniaturisation, in a truck platform. SAFARI is primarily focussed on trucks at HAR who run a fleet of LNG trucks, but the project will also consiser other options including buses and delivery vehicles using LNG. Trials will be undertaken in the UK especially to comply with approvals for codes and standards, as well as assessing the economic fleet potential. LNG was selected as the fuel because it is increasing in importance for trucks across the EU, with lower costs and much lower emissions than diesel trucks. Also, LNG is widely available throughout the EU with long-term supplies guaranteed for the next two centuries. The SOFC was chosen because it can operate readily on LNG, while providing low emissions, low noise and good heat/chilling available. In addition it is modular with potential for extending truck applications. The main benefit for the truck maufacturer is reduced emissions fom LNG boil-off.
Archived project
Archived project