The Experts below are selected from a list of 80895 Experts worldwide ranked by ideXlab platform
Thomas F Jaramillo - One of the best experts on this subject based on the ideXlab platform.
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design and fabrication of a precious metal free tandem core shell p n si w doped bivo4 photoanode for unassisted water splitting
Advanced Energy Materials, 2017Co-Authors: Pongkarn Chakthranont, Thomas R Hellstern, Joshua M Mcenaney, Thomas F JaramilloAbstract:Tandem photoelectrochemical water splitting cells utilizing crystalline Si and metal oxide photoabsorbers are promising for low-cost solar Hydrogen production. This study presents a device design and a scalable fabrication scheme for a tandem heterostructure photoanode: p+n black silicon (Si)/SnO2 interface/W-doped bismuth vanadate (BiVO4)/cobalt phosphate (CoPi) catalyst. The black-Si not only provides a substantial photovoltage of 550 mV, but it also serves as a conductive scaffold to decrease charge transport pathlengths within the W-doped BiVO4 shell. When coupled with cobalt phosphide (CoP) nanoparticles as Hydrogen evolution catalysts, the device demonstrates spontaneous water splitting without employing any precious metals, achieving an average solar-to-Hydrogen Efficiency of 0.45% over the course of an hour at pH 7. This fabrication scheme offers the modularity to optimize individual cell components, e.g., Si nanowire dimensions and metal oxide film thickness, involving steps that are compatible with fabricating monolithic devices. This design is general in nature and can be readily adapted to novel, higher performance semiconducting materials beyond BiVO4 as they become available, which will accelerate the process of device realization.
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solar water splitting by photovoltaic electrolysis with a solar to Hydrogen Efficiency over 30
Nature Communications, 2016Co-Authors: Jieyang Jia, Jia Wei Desmond Ng, Linsey C Seitz, Jesse D Benck, Yijie Huo, Yusi Chen, Taner Bilir, J S Harris, Thomas F JaramilloAbstract:In order to be practical for large-scale deployment, the cost of solar Hydrogen generation must be significantly reduced. Here, the authors employ a triple-junction solar cell with two series connected polymer electrolyte membrane electrolysers to achieve solar to Hydrogen Efficiency of 30%.
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solar water splitting by photovoltaic electrolysis with a solar to Hydrogen Efficiency over 30
Nature Communications, 2016Co-Authors: Jieyang Jia, Linsey C Seitz, Jesse D Benck, Yijie Huo, Yusi Chen, Taner Bilir, J S Harris, Thomas F JaramilloAbstract:Hydrogen production via electrochemical water splitting is a promising approach for storing solar energy. For this technology to be economically competitive, it is critical to develop water splitting systems with high solar-to-Hydrogen (STH) efficiencies. Here we report a photovoltaic-electrolysis system with the highest STH Efficiency for any water splitting technology to date, to the best of our knowledge. Our system consists of two polymer electrolyte membrane electrolysers in series with one InGaP/GaAs/GaInNAsSb triple-junction solar cell, which produces a large-enough voltage to drive both electrolysers with no additional energy input. The solar concentration is adjusted such that the maximum power point of the photovoltaic is well matched to the operating capacity of the electrolysers to optimize the system Efficiency. The system achieves a 48-h average STH Efficiency of 30%. These results demonstrate the potential of photovoltaic-electrolysis systems for cost-effective solar energy storage.
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accelerating materials development for photoelectrochemical Hydrogen production standards for methods definitions and reporting protocols
Journal of Materials Research, 2010Co-Authors: Zhebo Chen, Todd G Deutsch, Arnold J. Forman, Thomas F Jaramillo, Alan Kleimanshwarsctein, Nicolas Gaillard, Roxanne Garland, Kazuhiro Takanabe, C Heske, Mahendra K SunkaraAbstract:Photoelectrochemical (PEC) water splitting for Hydrogen production is a promising technology that uses sunlight and water to produce renewable Hydrogen with oxygen as a by-product. In the expanding field of PEC Hydrogen production, the use of standardized © 2010 Materials Research Society screening methods and reporting has emerged as a necessity. This article is intended to provide guidance on key practices in characterization of PEC materials and proper reporting of efficiencies. Presented here are the definitions of various Efficiency values that pertain to PEC, with an emphasis on the importance of solar-to-Hydrogen Efficiency, as well as a flow chart with standard procedures for PEC characterization techniques for planar photoelectrode materials (i.e., not suspensions of particles) with a focus on single band gap absorbers. These guidelines serve as a foundation and prelude to a much more complete and in-depth discussion of PEC techniques and procedures presented elsewhere.
Can Li - One of the best experts on this subject based on the ideXlab platform.
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Transition-Metal-Based Electrocatalysts as Cocatalysts for Photoelectrochemical Water Splitting: A Mini Review.
Small, 2018Co-Authors: Deng Li, Can LiAbstract:: Converting solar energy into Hydrogen via photoelectrochemical (PEC) water splitting is one of the most promising approaches for a sustainable energy supply. Highly active, cost-effective, and robust photoelectrodes are undoubtedly crucial for the PEC technology. To achieve this goal, transition-metal-based electrocatalysts have been widely used as cocatalysts to improve the performance of PEC cells for water splitting. Herein, this Review summarizes the recent progresses of the design, synthesis, and application of transition-metal-based electrocatalysts as cocatalysts for PEC water splitting. Mo, Ni, Co-based electrocatalysts for the Hydrogen evolution reaction (HER) and Co, Ni, Fe-based electrocatalysts for the oxygen evolution reaction (OER) are emphasized as cocatalysts for efficient PEC HER and OER, respectively. Particularly, some most efficient and robust photoelectrode systems with record photocurrent density or durability for the half reactions of HER and OER are highlighted and discussed. In addition, the self-biased PEC devices with high solar-to-Hydrogen Efficiency based on earth-abundant materials are also addressed. Finally, this Review is concluded with a summary and remarks on some challenges and opportunities for the further development of transition-metal-based electrocatalysts as cocatalysts for PEC water splitting.
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mimicking the key functions of photosystem ii in artificial photosynthesis for photoelectrocatalytic water splitting
Journal of the American Chemical Society, 2018Co-Authors: Pingwu Du, Sheng Ye, Ping Fu, Zhiliang Wang, Chunmei Ding, Xiuli Wang, Ruotian Chen, Can LiAbstract:It has been anticipated that learning from nature photosynthesis is a rational and effective way to develop artificial photosynthesis system, but it is still a great challenge. Here, we assembled a photoelectrocatalytic system by mimicking the functions of photosystem II (PSII) with BiVO4 semiconductor as a light harvester protected by a layered double hydroxide (NiFeLDH) as a hole storage layer, a partially oxidized graphene (pGO) as biomimetic tyrosine for charge transfer, and molecular Co cubane as oxygen evolution complex. The integrated system exhibited an unprecedentedly low onset potential (0.17 V) and a high photocurrent (4.45 mA cm–2), with a 2.0% solar to Hydrogen Efficiency. Spectroscopic studies revealed that this photoelectrocatalytic system exhibited superiority in charge separation and transfer by benefiting from mimicking the key functions of PSII. The success of the biomimetic strategy opened up new ways for the rational design and assembly of artificial photosynthesis systems for efficie...
Linsey C Seitz - One of the best experts on this subject based on the ideXlab platform.
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solar water splitting by photovoltaic electrolysis with a solar to Hydrogen Efficiency over 30
Nature Communications, 2016Co-Authors: Jieyang Jia, Jia Wei Desmond Ng, Linsey C Seitz, Jesse D Benck, Yijie Huo, Yusi Chen, Taner Bilir, J S Harris, Thomas F JaramilloAbstract:In order to be practical for large-scale deployment, the cost of solar Hydrogen generation must be significantly reduced. Here, the authors employ a triple-junction solar cell with two series connected polymer electrolyte membrane electrolysers to achieve solar to Hydrogen Efficiency of 30%.
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solar water splitting by photovoltaic electrolysis with a solar to Hydrogen Efficiency over 30
Nature Communications, 2016Co-Authors: Jieyang Jia, Linsey C Seitz, Jesse D Benck, Yijie Huo, Yusi Chen, Taner Bilir, J S Harris, Thomas F JaramilloAbstract:Hydrogen production via electrochemical water splitting is a promising approach for storing solar energy. For this technology to be economically competitive, it is critical to develop water splitting systems with high solar-to-Hydrogen (STH) efficiencies. Here we report a photovoltaic-electrolysis system with the highest STH Efficiency for any water splitting technology to date, to the best of our knowledge. Our system consists of two polymer electrolyte membrane electrolysers in series with one InGaP/GaAs/GaInNAsSb triple-junction solar cell, which produces a large-enough voltage to drive both electrolysers with no additional energy input. The solar concentration is adjusted such that the maximum power point of the photovoltaic is well matched to the operating capacity of the electrolysers to optimize the system Efficiency. The system achieves a 48-h average STH Efficiency of 30%. These results demonstrate the potential of photovoltaic-electrolysis systems for cost-effective solar energy storage.
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Technical and economic feasibility of centralized facilities for solar Hydrogen production via photocatalysis and photoelectrochemistry
Energy and Environmental Science, 2013Co-Authors: Blaise A. Pinaud, Brian D. James, Kevin N. Baum, George N. Baum, Zhebo Chen, Todd G Deutsch, Arnold J. Forman, Linsey C Seitz, Jesse D Benck, Shane ArdoAbstract:Photoelectrochemical water splitting is a promising route for the renewable production of Hydrogen fuel. This work presents the results of a technical and economic feasibility analysis conducted for four hypothetical, centralized, large-scale Hydrogen production plants based on this technology. The four reactor types considered were a single bed particle suspension system, a dual bed particle suspension system, a fixed panel array, and a tracking concentrator array. The current performance of semiconductor absorbers and electrocatalysts were considered to compute reasonable solar-to-Hydrogen conversion efficiencies for each of the four systems. The U.S. Department of Energy H2A model was employed to calculate the levelized cost of Hydrogen output at the plant gate at 300 psi for a 10 tonne per day production scale. All capital expenditures and operating costs for the reactors and auxiliaries (compressors, control systems, etc.) were considered. The final cost varied from $1.60-$10.40 per kg H2 with the particle bed systems having lower costs than the panel-based systems. However, safety concerns due to the cogeneration of O2 and H2 in a single bed system and long molecular transport lengths in the dual bed system lead to greater uncertainty in their operation. A sensitivity analysis revealed that improvement in the solar-to-Hydrogen Efficiency of the panel-based systems could substantially drive down their costs. A key finding is that the production costs are consistent with the Department of Energy's targeted threshold cost of $2.00-$4.00 per kg H2 for dispensed Hydrogen, demonstrating that photoelectrochemical water splitting could be a viable route for Hydrogen production in the future if material performance targets can be met.
Jesse D Benck - One of the best experts on this subject based on the ideXlab platform.
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solar water splitting by photovoltaic electrolysis with a solar to Hydrogen Efficiency over 30
Nature Communications, 2016Co-Authors: Jieyang Jia, Jia Wei Desmond Ng, Linsey C Seitz, Jesse D Benck, Yijie Huo, Yusi Chen, Taner Bilir, J S Harris, Thomas F JaramilloAbstract:In order to be practical for large-scale deployment, the cost of solar Hydrogen generation must be significantly reduced. Here, the authors employ a triple-junction solar cell with two series connected polymer electrolyte membrane electrolysers to achieve solar to Hydrogen Efficiency of 30%.
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solar water splitting by photovoltaic electrolysis with a solar to Hydrogen Efficiency over 30
Nature Communications, 2016Co-Authors: Jieyang Jia, Linsey C Seitz, Jesse D Benck, Yijie Huo, Yusi Chen, Taner Bilir, J S Harris, Thomas F JaramilloAbstract:Hydrogen production via electrochemical water splitting is a promising approach for storing solar energy. For this technology to be economically competitive, it is critical to develop water splitting systems with high solar-to-Hydrogen (STH) efficiencies. Here we report a photovoltaic-electrolysis system with the highest STH Efficiency for any water splitting technology to date, to the best of our knowledge. Our system consists of two polymer electrolyte membrane electrolysers in series with one InGaP/GaAs/GaInNAsSb triple-junction solar cell, which produces a large-enough voltage to drive both electrolysers with no additional energy input. The solar concentration is adjusted such that the maximum power point of the photovoltaic is well matched to the operating capacity of the electrolysers to optimize the system Efficiency. The system achieves a 48-h average STH Efficiency of 30%. These results demonstrate the potential of photovoltaic-electrolysis systems for cost-effective solar energy storage.
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Technical and economic feasibility of centralized facilities for solar Hydrogen production via photocatalysis and photoelectrochemistry
Energy and Environmental Science, 2013Co-Authors: Blaise A. Pinaud, Brian D. James, Kevin N. Baum, George N. Baum, Zhebo Chen, Todd G Deutsch, Arnold J. Forman, Linsey C Seitz, Jesse D Benck, Shane ArdoAbstract:Photoelectrochemical water splitting is a promising route for the renewable production of Hydrogen fuel. This work presents the results of a technical and economic feasibility analysis conducted for four hypothetical, centralized, large-scale Hydrogen production plants based on this technology. The four reactor types considered were a single bed particle suspension system, a dual bed particle suspension system, a fixed panel array, and a tracking concentrator array. The current performance of semiconductor absorbers and electrocatalysts were considered to compute reasonable solar-to-Hydrogen conversion efficiencies for each of the four systems. The U.S. Department of Energy H2A model was employed to calculate the levelized cost of Hydrogen output at the plant gate at 300 psi for a 10 tonne per day production scale. All capital expenditures and operating costs for the reactors and auxiliaries (compressors, control systems, etc.) were considered. The final cost varied from $1.60-$10.40 per kg H2 with the particle bed systems having lower costs than the panel-based systems. However, safety concerns due to the cogeneration of O2 and H2 in a single bed system and long molecular transport lengths in the dual bed system lead to greater uncertainty in their operation. A sensitivity analysis revealed that improvement in the solar-to-Hydrogen Efficiency of the panel-based systems could substantially drive down their costs. A key finding is that the production costs are consistent with the Department of Energy's targeted threshold cost of $2.00-$4.00 per kg H2 for dispensed Hydrogen, demonstrating that photoelectrochemical water splitting could be a viable route for Hydrogen production in the future if material performance targets can be met.
Jieyang Jia - One of the best experts on this subject based on the ideXlab platform.
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solar water splitting by photovoltaic electrolysis with a solar to Hydrogen Efficiency over 30
Nature Communications, 2016Co-Authors: Jieyang Jia, Jia Wei Desmond Ng, Linsey C Seitz, Jesse D Benck, Yijie Huo, Yusi Chen, Taner Bilir, J S Harris, Thomas F JaramilloAbstract:In order to be practical for large-scale deployment, the cost of solar Hydrogen generation must be significantly reduced. Here, the authors employ a triple-junction solar cell with two series connected polymer electrolyte membrane electrolysers to achieve solar to Hydrogen Efficiency of 30%.
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solar water splitting by photovoltaic electrolysis with a solar to Hydrogen Efficiency over 30
Nature Communications, 2016Co-Authors: Jieyang Jia, Linsey C Seitz, Jesse D Benck, Yijie Huo, Yusi Chen, Taner Bilir, J S Harris, Thomas F JaramilloAbstract:Hydrogen production via electrochemical water splitting is a promising approach for storing solar energy. For this technology to be economically competitive, it is critical to develop water splitting systems with high solar-to-Hydrogen (STH) efficiencies. Here we report a photovoltaic-electrolysis system with the highest STH Efficiency for any water splitting technology to date, to the best of our knowledge. Our system consists of two polymer electrolyte membrane electrolysers in series with one InGaP/GaAs/GaInNAsSb triple-junction solar cell, which produces a large-enough voltage to drive both electrolysers with no additional energy input. The solar concentration is adjusted such that the maximum power point of the photovoltaic is well matched to the operating capacity of the electrolysers to optimize the system Efficiency. The system achieves a 48-h average STH Efficiency of 30%. These results demonstrate the potential of photovoltaic-electrolysis systems for cost-effective solar energy storage.
