A semitransparent particulate photoanode composed of SrTiO3 powder anchored on titania nanosheets

2021 ◽  
Author(s):  
Yosuke Kageshima ◽  
Haruka Momose ◽  
Fumiaki Takagi ◽  
Sora Fujisawa ◽  
Tetsuya Yamada ◽  
...  
Keyword(s):  
Water Splitting ◽  
Bottom Cell ◽  
Pec Cells

The development of semitransparent photoanodes is necessary to permit the construction of tandem-type photoelectrochemical (PEC) cells for water splitting in conjunction with an appropriate photocathode as the bottom cell. The...

scholarly journals Thickness-dependent photoelectrochemical properties of a semitransparent Co3O4 photocathode

2018 ◽  
Vol 9 ◽  
pp. 2432-2442 ◽  
Author(s):  
Malkeshkumar Patel ◽  
Joondong Kim
Keyword(s):  
Water Splitting ◽  
Water Oxidation ◽  
Hydrogen Generation ◽  
Hydrogen Gas ◽  
Generation Rate ◽  
Alkaline Electrolyte ◽  
Stoichiometric Ratio ◽  
Gas Generation ◽  
Pec Cells ◽  
Gas Generation Rate

Co3O4 has been widely studied as a catalyst when coupled with a photoactive material during hydrogen production using water splitting. Here, we demonstrate a photoactive spinel Co3O4 electrode grown by the Kirkendall diffusion thermal oxidation of Co nanoparticles. The thickness-dependent structural, physical, optical, and electrical properties of Co3O4 samples are comprehensively studied. Our analysis shows that two bandgaps of 1.5 eV and 2.1 eV coexist with p-type conductivity in porous and semitransparent Co3O4 samples, which exhibit light-induced photocurrent in photoelectrochemical cells (PEC) containing the alkaline electrolyte. The thickness-dependent properties of Co3O4 related to its use as a working electrode in PEC cells are extensively studied and show potential for the application in water oxidation and reduction processes. To demonstrate the stability, an alkaline cell was composed for the water splitting system by using two Co3O4 photoelectrodes. The oxygen gas generation rate was obtained to be 7.17 mL·h−1 cm−1. Meanwhile, hydrogen gas generation rate was almost twice of 14.35 mL·h−1·cm−1 indicating the stoichiometric ratio of 1:2. We propose that a semitransparent Co3O4 photoactive electrode is a prospective candidate for use in PEC cells via heterojunctions for hydrogen generation.

scholarly journals Synergies of co-doping in ultra-thin hematite photoanodes for solar water oxidation: In and Ti as representative case

RSC Advances ◽  
2020 ◽  
Vol 10 (55) ◽  
pp. 33307-33316
Author(s):  
Aadesh P. Singh ◽  
Camilla Tossi ◽  
Ilkka Tittonen ◽  
Anders Hellman ◽  
Björn Wickman
Keyword(s):  
Thin Film ◽  
Hydrogen Production ◽  
Solar Energy ◽  
Water Splitting ◽  
Water Oxidation ◽  
Representative Case ◽  
Solar Water ◽  
Co Doping ◽  
Pec Cells ◽  
Solar Water Oxidation

Solar energy induced water splitting in photoelectrochemical (PEC) cells is one of the most sustainable ways of hydrogen production. In this work, hematite (α-Fe2O3) thin film were modified by In3+ and Ti4+ co-doping for enhanced PEC performance.

Recent developments in carbon nitride based films for photoelectrochemical water splitting

2020 ◽  
Vol 4 (2) ◽  
pp. 485-503 ◽  
Author(s):  
Wei Xiong ◽  
Fei Huang ◽  
Rui-Qin Zhang
Keyword(s):  
Thermal Stability ◽  
Water Splitting ◽  
Carbon Nitride ◽  
Photoelectrochemical Water Splitting ◽  
Research Attention ◽  
Good Thermal Stability ◽  
Metal Free ◽  
Recent Developments ◽  
Pec Cells

As an emerging semiconductor for PEC cells, metal-free g-CN has generally attracted research attention from the community due to its merits, namely an appropriate bandgap, abundant composition elements, good thermal stability and non-toxicity.

scholarly journals TiO2-coated window for facilitated gas evolution in PEC solar water splitting

RSC Advances ◽  
2017 ◽  
Vol 7 (47) ◽  
pp. 29665-29671 ◽  
Author(s):  
Sérgio Miranda ◽  
António Vilanova ◽  
Tânia Lopes ◽  
Adélio Mendes
Keyword(s):  
Water Splitting ◽  
Gas Bubbles ◽  
Gas Evolution ◽  
Evolved Gas ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Front Window ◽  
Pec Cells

TiO2 films were prepared for facilitating the evolved gas bubbles to slip over the front window of PEC cells resulting in a transparency improvement of up to 10%.

scholarly journals Electrodeposition of cuprous oxide on a porous copper framework for an improved photoelectrochemical performance

2021 ◽  
Author(s):  
Mario Kurniawan ◽  
Michael Stich ◽  
Mayra Marimon ◽  
Magali Camargo ◽  
Ralf Peipmann ◽  
...  
Keyword(s):  
Water Splitting ◽  
Optical Transmittance ◽  
Photoelectrochemical Performance ◽  
Free Standing ◽  
Pore Networks ◽  
Porous Copper ◽  
Cu Substrates ◽  
Feasible Alternative ◽  
Pec Cells ◽  
Pec Water Splitting

Abstract Photoelectrochemical (PEC) water splitting can be an efficient and economically feasible alternative for hydrogen production if easily processed photoelectrodes made of inexpensive and abundant materials are employed. Here, we present the preparation of porous Cu2O photocathodes with good PEC performance using solely inexpensive electrodeposition methods. Firstly, porous Cu structures with delicate pore networks were deposited on flat Cu substrates employing hydrogen-bubble-assisted Cu deposition. In a second electrodeposition step, the porous Cu structures were mechanically reinforced and subsequently detached from the substrates to obtain free-standing porous frameworks. In a third and final step, photoactive Cu2O films were electrodeposited. The PEC water splitting performance in 0.5 M Na2SO4 (pH ∼6) shows that these photocathodes have photocurrents of up to −2.25 mA cm−2 at 0 V versus RHE while maintaining a low dark current. In contrast, the Cu2O deposited on a flat Cu sample showed photocurrents only up to −1.25 mA cm−2. This performance increase results from the significantly higher reactive surface area while maintaining a thin and homogeneous Cu2O layer with small grain sizes and therefore higher hole concentrations as determined by Mott-Schottky analysis. The free-standing porous Cu2O samples show a direct optical transmittance of 23% (λ = 400–800 nm) and can therefore be used in tandem structures with a photoanode in full PEC cells. Graphical abstract

scholarly journals Dye-sensitized PS- b -P2VP-templated nickel oxide films for photoelectrochemical applications

2015 ◽  
Vol 5 (3) ◽  
pp. 20140083 ◽  
Author(s):  
Julien Massin ◽  
Maximilian Bräutigam ◽  
Nicolas Kaeffer ◽  
Nicolas Queyriaux ◽  
Martin J. Field ◽  
...  
Keyword(s):  
Water Splitting ◽  
Materials Science ◽  
Triblock Copolymers ◽  
Molecular Chemistry ◽  
Dye Sensitized ◽  
Overall Performance ◽  
Pec Cells ◽  
Nickel Oxide Films ◽  
Preparation And Evaluation ◽  
Nio Films

Moving from homogeneous water-splitting photocatalytic systems to photoelectrochemical devices requires the preparation and evaluation of novel p -type transparent conductive photoelectrode substrates. We report here on the sensitization of polystyrene- block -poly-(2-vinylpyridine) (PS- b -P2VP) diblock copolymer-templated NiO films with an organic push–pull dye. The potential of these new templated NiO film preparations for photoelectrochemical applications is compared with NiO material templated by F108 triblock copolymers. We conclude that NiO films are promising materials for the construction of dye-sensitized photocathodes to be inserted into photoelectrochemical (PEC) cells. However, a combined effort at the interface between materials science and molecular chemistry, ideally funded within a Global Artificial Photosynthesis Project, is still needed to improve the overall performance of the photoelectrodes and progress towards economically viable PEC devices.

I-III-VI2 (Copper Chalcopyrite-based) Thin Films for Photoelectrochemical Water-Splitting Tandem-Hybrid Photocathode

2011 ◽  
Vol 1324 ◽  
Author(s):  
Jess M. Kaneshiro ◽  
Alexander Deangelis ◽  
Xi Song ◽  
Nicolas Gaillard ◽  
Eric L. Miller
Keyword(s):  
Thin Films ◽  
Water Splitting ◽  
Photoelectrochemical Water Splitting ◽  
Monolithically Integrated ◽  
Pec Cells ◽  
Acidic Electrolyte ◽  
Copper Chalcopyrite ◽  
Splitting Water

ABSTRACTThis presentation will investigate various parameters regarding the use of I-III-VI2 Copper Chalcopyrite-based materials for use in tandem-hybrid photocathodes capable of splitting water into hydrogen and oxygen gases in an acidic electrolyte. Constituent parts (fabricated at HNEI) of a proposed monolithically integrated hybrid photovoltaic/photoelectrochemical (PV/PEC) device were characterized separately and combined theoretically using electronic and optical models to simulate tandem operation to first indicate feasibility of matching existing materials. Robust CGSe2 photocathodes were focused on for the PEC cells and CIGSe2 and CISe2 devices were evaluated for the PV cells. Simulation suggested the hybrid PV/PEC system could pass enough light to produce up to 15.87mA/cm2, validating the feasibility and warranting the fabrication of stacked PV/PEC devices.

scholarly journals Dynamic Phenomenological Modeling of Pec Cells for Water Splitting Under Outdoor Conditions

2012 ◽  
Vol 22 ◽  
pp. 23-34 ◽  
Author(s):  
Luisa Andrade ◽  
Tania Lopes ◽  
Adelio Mendes
Keyword(s):  
Water Splitting ◽  
Phenomenological Modeling ◽  
Pec Cells
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