Listar por autoría "2c9dffb6-d56f-4e5f-87a3-4f2e25574c10"
Mostrando ítems 1-14 de 14
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Chromium doped copper vanadate photoanodes for water splitting
Cardenas-Morcoso, Drialys; Peiro-Franch, Anna; Herraiz Cardona, Isaac; Giménez Juliá, Sixto Elsevier (2017-07-15)Solar hydrogen obtained from photoelectrochemical water splitting offers a versatile approach towards the substitution of fossil fuels by decentralized and sustainable resources, like water and sun. In the present study ... -
Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting
Hegner, Franziska; Herraiz Cardona, Isaac; Cardenas-Morcoso, Drialys; López, Núria; Galan-Mascaros, Jose Ramon; Giménez Juliá, Sixto (2017-11-01)The efficient integration of photoactive and catalytic materials is key to promoting photoelectrochemical water splitting as a sustainable energy technology built on solar power. Here, we report highly stable water splitting ... -
Controlled Carbon Nitride Growth on Surfaces for Hydrogen Evolution Electrodes
Shalom, Menny; Giménez Juliá, Sixto; Schipper, Florian; Herraiz Cardona, Isaac; Bisquert, Juan; Antonietti, Markus Wiley (2014-04-01)Efficient and low-cost electrocatalysts for the hydrogen evolution reaction are highly desired for future renewable energy systems. Described herein is the reduction of water to hydrogen using a metal-free carbon nitride ... -
Cooperative Catalytic Effect of ZrO2 and a-Fe2O3 Nanoparticles on BiVO4 Photoanodes for Enhanced Photoelectrochemical Water Splitting
Shaddad, Maged; Ghanem, Mohamed A.; Al-Mayouf, Abdullah; Giménez Juliá, Sixto; Bisquert, Juan; Herraiz Cardona, Isaac Wiley (2016-09)Photoelectrochemical water splitting with metal oxide semiconductors offers a cost-competitive alternative for the generation of solar fuels. Most of the materials studied so far suffer from poor charge-transfer kinetics ... -
Hole conductivity and acceptor density of p-type CuGaO2 nanoparticles determined by impedance spectroscopy: The effect of Mg doping
Herraiz Cardona, Isaac; Fabregat-Santiago, Francisco; Renaud, Adèle; Julian-Lopez, Beatriz; Odobel, Fabrice; Carioc, Laurent; Jobic, Stéphane; Giménez Juliá, Sixto Elsevier (2013)Delafossite materials like CuGaO2 have appeared as promising p-type semiconductor materials for their exploitation in tandem dye sensitized solar cells and water splitting photoelectrochemical cells. However, the intrinsic ... -
Near-complete suppression of surface losses and total internal quantum efficiency in BiVO4 photoanodes
Trzesniewski, Bartek J.; Digdaya, Ibadillah; Nagaki, Tetsuro; Ravishankar, Sandheep; Herraiz Cardona, Isaac; Vermaas, David; Longo, Alessandro; Giménez Juliá, Sixto; Smith, Wilson A. Royal Society of Chemistry (2017-05-26)Bismuth vanadate (BiVO4) is one of the most efficient light absorbing metal oxides for solar water splitting. BiVO4 photoanodes immersed in an electrolyte in an open circuit configuration and exposed to simulated solar ... -
Plasmonic versus catalytic effect of gold nanoparticles on mesoporous TiO2 electrodes for water splitting
Haro, Marta; Abargues, Rafael; Herraiz Cardona, Isaac; Martínez-Pastor, Juan P.; Giménez Juliá, Sixto Elsevier (2014-10)Solar water splitting with metal oxide semiconductors constitutes a promising approach to the conversion of solar energy into chemical energy stored in the atomic bonds of hydrogen molecules. In the present study, we ... -
Relaxation of Electron Carriers in the Density of States of Nanocrystalline TiO2
Bertoluzzi, Luca; Herraiz Cardona, Isaac; Gottesman, Ronen; Zaban, Arie; Bisquert, Juan American Chemical Society (2014-01)Band gap localized states and surface states play a dominant role in the application of nanocrystalline metal oxides to photovoltaics and solar fuel production. Electrons injected in nanocrystalline TiO2 by voltage or ... -
Solar Energy Storage by a Heterostructured BiVO4–PbOx Photocapacitive Device
Safshekan, Saeid; Herraiz Cardona, Isaac; Cardenas-Morcoso, Drialys; Ojani, Reza; Haro, Marta; Giménez Juliá, Sixto American Chemical Society (2017)The development of solar energy storage strategies is a key step for handling the inherent variability of sunlight within a global solar-based energy model. In the present study, we have developed a photocapacitive device ... -
Stability of 3D-porous Ni/Cu cathodes under real alkaline electrolyzer operating conditions and its effect on catalytic activity
Valero-Vidal, Carlos; Herraiz Cardona, Isaac; Pérez-Herranz, Valentín; Igual-Muñoz, Anna Elsevier (2016)Despite the development and synthesis of new electrode materials for hydrogen generation in alkaline water electrolyzers has been a research topic widely exploited in the last years, stability tests on the obtained cathodes ... -
Study of the catalytic activity of 3D macroporous Ni and NiMo cathodes for hydrogen production by alkaline water electrolysis
González Buch, Cristina; Herraiz Cardona, Isaac; Ortega, Emma; García-Antón, J.; Pérez-Herranz, Valentín Springer Verlag (2016)Platinum is the electrode material with the highest catalytic activity for the hydrogen evolution reaction (HER). However, its high cost and scarcity are the two major barriers for its usage in the industrial alkaline water ... -
Synthesis and characterization of Au-modified macroporous Ni electrocatalysts for alkaline water electrolysis
González Buch, Cristina; Herraiz Cardona, Isaac; Ortega, Emma; Mestre Beltrán, Sergio; Pérez-Herranz, Valentín Elsevier (2016-01)Au nanoparticles (Au-NPs) were successfully synthesized and incorporated into the surface of a macroporous Ni electrode fabricated via galvanostatic electrodeposition at high current densities in order to produce hydrogen ... -
The Complex Role of Carbon Nitride as a Sensitizer in Photoelectrochemical Cells
Herraiz Cardona, Isaac; Yang, Xiaofei; Giménez Juliá, Sixto; Antonietti, Markus; Shalom, Menny; Xu, Jingsan Wiley (2015-08)The role of carbon nitride (C3N4) as an absorber in a photoelectrochemical cell is reported. C3N4-sensitized TiO2 mesoporous film created via in-situ, vapor-transport growth results in a direct Ti–O–C bonding. The material ... -
Understanding the Role of Underlayers and Overlayers in Thin Film Hematite Photoanodes
Steier, Ludmila; Herraiz Cardona, Isaac; Fabregat-Santiago, Francisco; Bisquert, Juan; Tilley, S. David; Grätzel, Michael Wiley (2014-12-23)Recent research on photoanodes for photoelectrochemical water splitting has introduced the concept of under- and overlayers for the activation of ultrathin hematite films. Their effects on the photocatalytic behavior were ...