A5013970392- Catalytic Processes in Materials Science
- Electrocatalysts for Energy Conversion
- Catalysis and Oxidation Reactions
- Fuel Cells and Related Materials
- Catalysts for Methane Reforming
- Advanced battery technologies research
- Catalysis and Hydrodesulfurization Studies
- Embedded Systems Design Techniques
- Electrochemical Analysis and Applications
- Advancements in Solid Oxide Fuel Cells
- Formal Methods in Verification
- Magnetic and transport properties of perovskites and related materials
- Heart Rate Variability and Autonomic Control
- CO2 Reduction Techniques and Catalysts
- Phonocardiography and Auscultation Techniques
- ECG Monitoring and Analysis
- VLSI and Analog Circuit Testing
- Layered Double Hydroxides Synthesis and Applications
- Real-Time Systems Scheduling
- Complex Systems and Time Series Analysis
- Electronic and Structural Properties of Oxides
- Catalysis for Biomass Conversion
- Industrial Gas Emission Control
- Nanomaterials for catalytic reactions
- Neonatal and fetal brain pathology
University of Concepción
2025
Instituto de Catálisis y Petroleoquímica
2014-2023
Institute of Catalysis and Petrochemistry
2021-2023
Massachusetts General Hospital
2021
University of Chile
2008-2021
Tufts University
2020
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2019
University of Zulia
2018
Consejo Superior de Investigaciones Científicas
2003-2014
Universidad Autónoma Metropolitana
2002-2012
Abstract The design of active and durable catalysts for the H 2 O/O interconversion is one major challenges electrocatalysis renewable energy. oxygen evolution reaction (OER) catalyzed by SrRuO 3 with low potentials (ca. 1.35 V RHE ), but catalyst’s durability insufficient. Here we show that Na doping enhances both activity in acid media. DFT reveals whereas binds intermediates too strongly, ~0.125 leads to nearly optimal OER activity. increases oxidation state Ru, thereby displacing...
Perovskites (ABO3) with transition metals in active B sites are considered alternative catalysts for the water oxidation to oxygen through evolution reaction (OER) and reduction (ORR) back water. We have synthesized a double perovskite (A2BB'O6) different cations A, B, B' sites, namely, (La1.5Sr0.5)A(Ni0.5Mn0.5)B(Ni0.5Ru0.5)B'O6 (LSNMR), which displays an outstanding OER/ORR bifunctional performance. The composition structure of oxide has been determined by powder X-ray diffraction, neutron...
Proton exchange membrane water electrolysis is a promising technology to produce green hydrogen from renewables, as it can efficiently achieve high current densities. Lowering iridium amount in oxygen evolution reaction electrocatalysts critical for achieving cost-effective production of hydrogen. In this work, we develop catalysts Ir double perovskites. Sr
The production of green hydrogen in water electrolyzers is limited by the oxygen evolution reaction (OER). State-of-the-art electrocatalysts are based on Ir. Ru a suitable alternative provided their performance improved. Here we show that low-Ru-content pyrochlores (R2MnRuO7, R = Y, Tb and Dy) display high activity durability for OER acidic media. Y2MnRuO7 most stable catalyst, displaying 1.5 V at 10 mA cm-2 40 h, or 5000 cycles up to 1.7 V. Computational experimental results owed sites...
Pt and Au are not miscible within a whole range of concentrations. To obtain PtAu alloys, severe thermal treatments required that to provide aggregation phenomena. However, it is possible synthesize bimetallic nanoparticles provided the proper synthesis route employed. When they prepared from water-in-oil microemulsions or with impregnation technique, nanosized particles. In contrast, other colloidal routes have been seen be adequate for Pt-based particles, affording segregated samples Pt-...
Click to increase image sizeClick decrease sizeKeywords: Methane activationMethanol and formaldehydeMechanismsHomogeneous heterogeneous reactions Acknowledgments This work was partially supported by the New Energy Industrial Technology Department Organization (NEDO) under Environmental Catalyst Research Project (Japan), Interministerial Commission of Science (Spain) QUI98-0877.
Carbon-supported PtRu—MoOx nanoparticles with significant CO tolerance were prepared by a new two-step procedure: in the first step, molybdenum oxide was deposited on carbon substrate (MoOx/C) impregnation, and second one, Pt Ru incorporated following colloidal method NaHSO3. The composition, particle size, crystallinity of catalysts determined X-ray analytical methods (X-ray diffraction (XRD), photoelectron spectroscopy (XPS), total-reflection fluorescence (TXRF)), transmission electron...
TiC, TiCN, and TiN supported Pt nanoparticles have been investigated as anode electrocatalytic materials for direct methanol fuel cells. The catalysts were studied in acidic alkaline media compared with platinum on carbon black. CO oxidation by voltammetry chronoamperometry techniques. Transmission electron microscopy, X-ray photoelectron spectroscopy diffraction analysis employed to characterize the novel catalysts. Results show that a carbon-supported catalyst is mainly formed long (111)...