scholarly journals An experimental and modeling/simulation-based evaluation of the efficiency and operational performance characteristics of an integrated, membrane-free, neutral pH solar-driven water-splitting system

2014 ◽  
Vol 7 (10) ◽  
pp. 3371-3380 ◽  
Author(s):  
Jian Jin ◽  
Karl Walczak ◽  
Meenesh R. Singh ◽  
Chris Karp ◽  
Nathan S. Lewis ◽  
...  
Keyword(s):  
Water Splitting ◽  
Performance Characteristics ◽  
Operational Performance ◽  
Solar Hydrogen ◽  
Modeling Simulation ◽  
Neutral Ph ◽  
System P ◽  
Simulation Based ◽  
Splitting System

An experimental and modeling based evaluation of a solar-hydrogen device that operates in electrolytes buffered at near-neutral pH.

Solar Hydrogen Production: Direct Water Splitting Into Hydrogen and Oxygen by New Photocatalysts Under Visible Light Irradiation

Solar Energy ◽  
2003 ◽  
Author(s):  
Hironori Arakawa ◽  
Zhigang Zou ◽  
Kazuhiro Sayama ◽  
Ryu Abe
Keyword(s):  
Quantum Yield ◽  
Solar Energy ◽  
Visible Light ◽  
Water Splitting ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Solar Hydrogen ◽  
Solar Hydrogen Production ◽  
Natural Photosynthesis ◽  
Splitting System

The photocatalytic splitting of water into hydrogen and oxygen using solar energy is one of the most attractive renewable sources of hydrogen fuel. Therefore, considerable efforts have been paid in developing photocatalysts capable of using visible light, which accounts for about 43% of the solar energy. However such a photocatalyst has not been developed so far. We have developed a new Ni-doped indium-tantalum oxide photocatalyst, In1-xNixTaO4 (x = 0.0∼0.2), which induced direct splitting of water into stoichiometric amount of oxygen and hydrogen under visible light irradiation with a quantum yield of about 0.66% at 420.7 nm. We have also developed a new two-step water splitting system using two different semiconductor photocatalysts, Pt/WO3 photocatalyst for oxygen evolution and Pt/SrTiO3(Cr-Ta-doped) photocatalyst for hydrogen evolution, and a redox mediator, I−/IO3−, mimicking the Z-scheme mechanism of the natural photosynthesis. The quantum yield of this system was about 0.1% at 420.7nm. Both photocatalytic methods are the first examples for visible light water splitting system in the world.

A selectively decorated Ti-FeOOH co-catalyst for a highly efficient porous hematite-based water splitting system

2016 ◽  
Vol 4 (48) ◽  
pp. 18730-18736 ◽  
Author(s):  
Ki-Yong Yoon ◽  
Hyo-Jin Ahn ◽  
Myung-Jun Kwak ◽  
Sun-I. Kim ◽  
Juhyung Park ◽  
...  
Keyword(s):  
Thin Layer ◽  
Water Splitting ◽  
Photoelectrochemical Cell ◽  
Co Catalyst ◽  
Highly Efficient ◽  
System P ◽  
Splitting System

We report an efficient Ti-doped FeOOH (Ti-FeOOH) co-catalyst applied on SiOx thin layer coated Ti-doped porous Fe2O3 (Ti-PH) to realize an excellent water splitting photoelectrochemical cell.

Modeling, Simulation, and Fabrication of a Fully Integrated, Acid-stable, Scalable Solar-Driven Water-Splitting System

ChemSusChem ◽  
2015 ◽  
Vol 8 (3) ◽  
pp. 544-551 ◽  
Author(s):  
Karl Walczak ◽  
Yikai Chen ◽  
Christoph Karp ◽  
Jeffrey W. Beeman ◽  
Matthew Shaner ◽  
...  
Keyword(s):  
Water Splitting ◽  
Fully Integrated ◽  
Modeling Simulation ◽  
Acid Stable ◽  
Splitting System

scholarly journals Wittichenite semiconductor of Cu3BiS3 films for efficient hydrogen evolution from solar driven photoelectrochemical water splitting

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Dingwang Huang ◽  
Lintao Li ◽  
Kang Wang ◽  
Yan Li ◽  
Kuang Feng ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Low Cost ◽  
Solar Hydrogen ◽  
Onset Potential ◽  
Term Stability ◽  
Long Term Stability ◽  
Solar Water Splitting ◽  
Current Densities

AbstractA highly efficient, low-cost and environmentally friendly photocathode with long-term stability is the goal of practical solar hydrogen evolution applications. Here, we found that the Cu3BiS3 film-based photocathode meets the abovementioned requirements. The Cu3BiS3-based photocathode presents a remarkable onset potential over 0.9 VRHE with excellent photoelectrochemical current densities (~7 mA/cm2 under 0 VRHE) and appreciable 10-hour long-term stability in neutral water solutions. This high onset potential of the Cu3BiS3-based photocathode directly results in a good unbiased operating photocurrent of ~1.6 mA/cm2 assisted by the BiVO4 photoanode. A tandem device of Cu3BiS3-BiVO4 with an unbiased solar-to-hydrogen conversion efficiency of 2.04% is presented. This tandem device also presents high stability over 20 hours. Ultimately, a 5 × 5 cm2 large Cu3BiS3-BiVO4 tandem device module is fabricated for standalone overall solar water splitting with a long-term stability of 60 hours.

scholarly journals Emerging Energy Harvesting Technology for Electro/Photo-Catalytic Water Splitting Application

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 142
Author(s):  
Jianfei Tang ◽  
Tianle Liu ◽  
Sijia Miao ◽  
Yuljae Cho
Keyword(s):  
Energy Harvesting ◽  
Water Splitting ◽  
Social Impact ◽  
Electrical Energy ◽  
Future Research ◽  
Daily Lives ◽  
Energy Applications ◽  
Sustainable Environment ◽  
Energy Technologies ◽  
Splitting System

In recent years, we have experienced extreme climate changes due to the global warming, continuously impacting and changing our daily lives. To build a sustainable environment and society, various energy technologies have been developed and introduced. Among them, energy harvesting, converting ambient environmental energy into electrical energy, has emerged as one of the promising technologies for a variety of energy applications. In particular, a photo (electro) catalytic water splitting system, coupled with emerging energy harvesting technology, has demonstrated high device performance, demonstrating its great social impact for the development of the new water splitting system. In this review article, we introduce and discuss in detail the emerging energy-harvesting technology for photo (electro) catalytic water splitting applications. The article includes fundamentals of photocatalytic and electrocatalytic water splitting and water splitting applications coupled with the emerging energy-harvesting technologies using piezoelectric, piezo-phototronic, pyroelectric, triboelectric, and photovoltaic effects. We comprehensively deal with different mechanisms in water splitting processes with respect to the energy harvesting processes and their effect on the water splitting systems. Lastly, new opportunities in energy harvesting-assisted water splitting are introduced together with future research directions that need to be investigated for further development of new types of water splitting systems.

scholarly journals Solar Hydrogen Generation from Water Splitting Using ZnO/CuO Hetero Nanostructures

2014 ◽  
Vol 61 ◽  
pp. 345-348 ◽  
Author(s):  
Qiaobao Zhang ◽  
Daguo Xu ◽  
Xiang Zhou ◽  
Kaili Zhang
Keyword(s):  
Water Splitting ◽  
Hydrogen Generation ◽  
Solar Hydrogen

scholarly journals Modeling, Simulation, and Implementation of Solar-Driven Water-Splitting Devices

2016 ◽  
Vol 55 (42) ◽  
pp. 12974-12988 ◽  
Author(s):  
Chengxiang Xiang ◽  
Adam Z. Weber ◽  
Shane Ardo ◽  
Alan Berger ◽  
YiKai Chen ◽  
...  
Keyword(s):  
Water Splitting ◽  
Modeling Simulation

scholarly journals Design and Demonstration of Large Scale Cu2O Photocathodes with Metal Grid Structure for Photoelectrochemical Water Splitting

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7422
Author(s):  
Min-Kyu Son
Keyword(s):  
Water Splitting ◽  
Large Scale ◽  
Grid Structure ◽  
Large Area ◽  
Intrinsic Conductivity ◽  
Metal Grid ◽  
Splitting System ◽  
Insight Into ◽  
Better Than

Upscaling of photoelectrode for a practical photoelectrochemical (PEC) water splitting system is still challenging because the PEC performance of large-scale photoelectrode is significantly low, compared to the lab scale photoelectrode. In an effort to overcome this challenge, sputtered gold (Au) and copper (Cu) grid lines were introduced to improve the PEC performance of large-scale cuprous oxide (Cu2O) photocathode in this work. It was demonstrated that Cu grid lines are more effective than Au grid lines to improve the PEC performance of large-scale Cu2O photocathode because its intrinsic conductivity and quality of grid lines are better than ones containing Au grid lines. As a result, the PEC performance of a 25-cm2 scaled Cu2O photocathode with Cu grid lines was almost double than one without grid lines, resulting in an improved charge transport in the large area substrate by Cu grid lines. Finally, a 50-cm2 scaled Cu2O photocathode with Cu grid lines was tested in an outdoor condition under natural sun. This is the first outdoor PEC demonstration of large-scale Cu2O photocathode with Cu grid lines, which gives insight into the development of efficient upscaled PEC photoelectrode.

scholarly journals Inside Cover: WO3@α-Fe2O3Heterojunction Arrays with Improved Photoelectrochemical Behavior for Neutral pH Water Splitting (ChemCatChem 17/2016)

ChemCatChem ◽  
2016 ◽  
Vol 8 (17) ◽  
pp. 2734-2734
Author(s):  
Yuan Li ◽  
Lihan Zhang ◽  
Ruirui Liu ◽  
Zhen Cao ◽  
Xiaoming Sun ◽  
...  
Keyword(s):  
Water Splitting ◽  
Neutral Ph
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