Sentences with word «photoanode»

Development of Solar Fuels Photoanodes through Combinatorial Integration of Ni - La - Co-Ce and Ni - Fe - Co-Ce Oxide Catalysts on BiVO4.

Topics of research in the program include: investigations of novel materials as photoanodes for water oxidation and photocathodes for hydrogen production and carbon dioxide reduction, design of protection schemes against photocorrosion, theoretical modeling and computational simulations of band gaps and corrosion behavior, and development of new experimental techniques for characterization of optoelectronic properties of semiconductors.

Joel A. Haber, «Development of Solar Fuels Photoanodes through Combinatorial Integration of Ni - La - Co-Ce Oxide and Ni - Fe - Co-Ce Oxide Catalysts on BiVO4»

Discovery of Solar Fuels Photoanode Materials by Integrating High - Throughput Theory and Experiment.

Although metal oxides that absorb visible light are attractive for use as photoanodes in photoelectrosynthetic cells, their performance is often limited by poor charge carrier transport.

Reactive Sputtering of Bismuth Vanadate Photoanodes for Solar Water Splitting.

The second, which details the creation of photoanodes, appears in ACS Nano.

The team was able to produce a hybrid silicon - based photoanode structure that evolves oxygen at current densities above 15 mA / cm2.

Stable solar - driven oxidation of water by semiconducting photoanodes protected by transparent catalytic nickel oxide films.

Dr. Ager's research interests include the fundamental electronic and transport characteristics of photovoltaic materials, development of new photoanodes and photocathodes based on abundant elements for solar fuels production, and the development of new oxide - and sulfide - based transparent conductors.

Solar fuels photoanodes prepared by inkjet printing of copper vanadates.

Nanoscale Imaging of Charge Carrier Transport in Monoclinic Bismuth Vanadate Photoanodes via Atomic Force Microscopy.

P - type transparent conducting oxides (p - TCOs) coupled to semiconductor absorbers create efficient and stable water oxidation photoanodes with predicted multi-year operational stability

The promise of generating renewable energy from sunlight, carbon dioxide, and water can be realized through the discovery of efficient and robust photoelectrochemical (PEC) cell materials, specifically photoanodes.

Mechanistic Insights into Chemical and Photochemical Transformations of Bismuth Vanadate Photoanodes F. M. Toma, J. K. Cooper, V. Kunzelmann, M. T. McDowell, J. Yu, D. Larson, N. J. Borys, J. W. Beeman, F. A. Houle, K. A. Oersson, and I. D. Sharp

High - Throughput NEXAFS Study and First - Principles Calculations of Mixed Anion Photoanode Materials Showing 2 eV Band Gap Tuning S. W. Fackler, S. Suram, L. Zhou, A. N'Diaye, W. Drisdell, E. Arenholz, D. Prendergast, J. M. Gregoire, and J. Yano

(Invited) Chemical and Photochemical Transformations of Bismuth Vanadate and Catalyst Integration for Stable Photoanodes.

Optical, morphological, and electrochemical multimodal characterization for integrated BiVO4 photoanodes.

«Today, bismuth vanadate is one of the best materials available for constructing photoanodes,» said Sharp.

Quantification of the Loss Mechanisms in Emerging Water Splitting Photoanodes through Empirical Extraction of the Spatial Charge Collection Efficiency Gideon Segev, Chang - Ming Jiang, Hen Dotan, Jason Cooper, Jeffery Beeman, Daniel Grave, Ian Sharp, Avner Rothschild

The team is also excited that the collective effort provides not only the discovery of high - performance materials, but also the advancement in scientific understanding of metal oxide photoanodes.

Protection and Photovoltage Improvement of N - Type Semiconductor Photoanode for Water Oxidation by Atomic - Layer Deposition of Cobalt Oxide Xinghao Zhou, Rui Liu, Ke Sun, Kimberly Papadantonakis, Bruce Brunschwig, Nathan Lewis

In an integrated solar - fuels device with tandem light absorber PEC architecture, the ideal photoanode candidates are semiconductors, which have band gaps between 1.6 and 2 eV and a valence band energy that allows efficient photoelectrocatalysis of the oxygen evolution reaction (OER).

Amorphous TiO2 coatings stabilize Si, GaAs, and GaP photoanodes for efficient water oxidation.

Within JCAP, Dr. Haber's research focus surrounds the application of high - throughput methods to integrate promising lead materials into functional assemblies, such as integration of electrocatalyst libraries with light absorbers to produce functional photoanode and photocathode assemblies.

Effect of Tin Doping on alpha - Fe2O3 Photoanodes for Water Splitting.

To this end, once photoanodes have used solar energy to split water molecules, JCAP scientists need high performance semiconductor photocathodes that can use solar energy to catalyze fuel production.

Bottom: Solar driven water oxidation performance of 25 mA · cm − 2 at 1.23 V vs. RHE is among the highest reported for a Si - based photoanode; inset shows stable operation for at least 100 hours.

They then selected the ones that seemed most promising as photoanodes and used experiments to determine whether their calculations were right.

In two years, the scientists have already pinpointed 12 new photoanodes.

Solar Fuels Photoanodes Prepared by Inkjet Printing of Copper Vanadates P. Newhouse, D. Boyd, A. Shinde, D. Guevarra, L. Zhou, E. Soedarmadji, G. Li, J. B. Neaton, and J. M. Gregoire

Nanoscale imaging of charge carrier transport in bismuth vanadate photoanodes via photoconductive atomic force microscopy.

Combining high throughput experimentation with theory enabled discovery of a unique solar fuels photoanode with remarkable stability.

In collaboration with the Materials Project, JCAP's high - throughput experimentation team, led by John Gregoire (Caltech), and a theory team, led by Jeff Neaton and Kristin Persson (LBNL), now have a defined means for rapid identification of the most promising classes of photoanodes.

Development of solar fuels photoanodes through combinatorial integration of multifunctional Fe - Ce oxide coatings on BiVO4 as a function of coating composition, loading, and electrolyte J. Haber, D. Guevarra, A. Shinde, L. Zhou, F. Toma, J. Gregoire

Development of solar fuels photoanodes through combinatorial integration of Ni - La - Co-Ce oxide and Ni - Fe - Co-Ce oxide catalysts on BiVO4.

The combined material, called a photoanode, showed excellent stability while reaching a current density of 10 milliamps per square centimeter, the researchers reported.

«Without a membrane, the photoanode and photocathode are close enough to each other to conduct electricity, and if you also have bubbles of highly reactive hydrogen and oxygen gases being produced in the same place at the same time, that is a recipe for disaster,» Lewis says.

The photoanode uses sunlight to oxidize water molecules to generate oxygen gas, protons, and electrons, while the photocathode recombines the protons and electrons to form hydrogen gas.

«The job of the photoanode is to absorb sunlight and then use that energy to oxidize water — essentially splitting apart the H2O molecule and rearranging the atoms to form a fuel.

Photoanodes are key to this procedure.

The technique used to identify the photoanodes uses a combination of theory and practice — the scientists worked with a supercomputer and a database of around 60,000 materials, and used quantum mechanics to predict the properties of each material.

And because this photoanode material needs to have the right sunlight absorption and catalytic properties, they're very rare,» explained Gregoire.

However, this requires a «photoanode» — a sort of catalyst that can set the ball rolling — and researchers have had a tough time identifying them in the past.

The final product, Gregoire said, would look something like a solar panel and involve three components: the photoanode, a photocathode, which forms the fuel, and a membrane that separates the two.