Co–Mo–Se ternary chalcogenide thin film coated p-Si photocathode for efficient solar hydrogen production

2020 ◽  
pp. 2151002
Author(s):  
Cihan Kuru
Keyword(s):  
Thin Film ◽  
Hydrogen Production ◽  
Photocurrent Density ◽  
Superior Performance ◽  
Great Promise ◽  
High Catalytic Activity ◽  
Hydrogen Electrode ◽  
Onset Potential ◽  
Ternary Chalcogenide ◽  
Chalcogenide Thin Film

Photoelectrochemical (PEC) water splitting holds a great promise for clean and sustainable hydrogen production. In this study, the PEC performance of Co–Mo–Se ternary chalcogenide thin film coated Si photocathodes is investigated. The Co–Mo–Se films with various Co/Mo atomic ratios were prepared by thermal selenization of sputter deposited Co–Mo alloy films. Among the photocathodes, the Co–Mo–Se (3:10)/[Formula: see text]-Si surpasses the PEC performance of the MoSe2/[Formula: see text]-Si with an onset potential of +124 mV vs. reversible hydrogen electrode (RHE), a photocurrent density of −22.68 mA/cm2 at zero overpotential and good stability over 6 h period of test. The superior performance of the Co–Mo–Se (3:10)/[Formula: see text]-Si is ascribed to the high catalytic activity of the film in hydrogen evolution reaction (HER) and efficient collection of photogenerated charge carriers. Such ternary chalcogenide thin films offer exciting opportunities for many applications in which the physicochemical properties can be tuned by changing the relative amount of the solute atoms.

Development of Chalcogenide Thin Film Materials for Photoelectrochemical Hydrogen Production

2013 ◽  
Vol 1558 ◽  
Author(s):  
Nicolas Gaillard ◽  
Dixit Prasher ◽  
Jess Kaneshiro ◽  
Stewart Mallory ◽  
Marina Chong
Keyword(s):  
Thin Film ◽  
Hydrogen Production ◽  
Counter Electrode ◽  
Present Communication ◽  
Microstructural Characteristics ◽  
Faradaic Efficiency ◽  
Si Solar Cells ◽  
Copper Gallium Diselenide ◽  
Photoelectrochemical Hydrogen Production ◽  
Chalcogenide Thin Film

ABSTRACTIn the present communication, we report our efforts to integrate chalcogenide-based photoelectrochemical (PEC) materials into a standalone device capable of water-splitting using sunlight as the only source of energy. More specifically, the PEC performances of copper gallium diselenide are presented. First, a brief introduction to the material microstructural characteristics is presented. Then, the PEC properties are discussed, including incident-photonto-current efficiency (>60% in the visible), Faradaic efficiency (uncatalyzed, 86%) and durability (400 hours). Finally, we report the solar-to-hydrogen benchmark efficiency (3.7%) of a device made of a CuGaSe2 photocathode and a-Si solar cells measured in a 2-electrode configuration using a RuO2 counter electrode.

scholarly journals Highly Efficient Nanostructured Bi2WO6 Thin Film Electrodes for Photoelectrochemical and Environment Remediation

Nanomaterials ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 755 ◽  
Author(s):  
Bandar Y. Alfaifi ◽  
Hossein Bayahia ◽  
Asif Ali. Tahir
Keyword(s):  
Thin Film ◽  
Solar Energy ◽  
Energy Conversion ◽  
Dye Degradation ◽  
Chemical Vapor ◽  
Solar Energy Conversion ◽  
Deposition Process ◽  
Photocurrent Density ◽  
Onset Potential ◽  
Thin Film Electrodes

Nanostructured Bi2WO6 thin film electrodes with enhanced solar energy conversion and photocatalytic properties have been fabricated using Aerosol-Assisted Chemical Vapor Deposition (AACVD). By conveniently controlling the deposition process parameters, Bi2WO6 electrodes were fabricated with nanoplates and hierarchical buckyball-shaped microsphere structures morphology. A detailed study has been conducted to correlate the structure and morphology with the photoelectrochemical (PEC) and photocatalytic dye degradation performance. The PEC investigations revealed that the hierarchical buckyball-shaped microsphere structured Bi2WO6 electrodes have shown the photocurrent density of 220 μAcm−2 while nanoplates have a photocurrent density of 170 μAcm−2 at 0.23 V (vs. Ag/AgCl/3M KCl) under AM1.5 illumination. The PEC characterization of Bi2WO6 electrodes also reveals that the photocurrent density and photocurrent onset potential is strongly dependent on the orientation and morphology, hence the deposition parameters. Similarly, the methylene blue (MB) and rhodamine B (RhB) photodegradation performance of Bi2WO6 electrodes also show a strong correlation with morphology. This finding provides an appropriate route to engineer the energetic and interfacial properties of Bi2WO6 electrode to enhance solar energy conversion and the photocatalytic performance of semiconductor materials.

Surface Modification to a-SiC Photocathode Using Ruthenium Nanoparticles

2013 ◽  
Vol 1539 ◽  
Author(s):  
Feng Zhu ◽  
Ilvydas Matulionis ◽  
Nicolas Gaillard ◽  
Yuancheng Chang ◽  
Jian Hu ◽  
...  
Keyword(s):  
Surface Modification ◽  
Hydrogen Production ◽  
Water Splitting ◽  
Aqueous Electrolyte ◽  
Photocurrent Density ◽  
Ruthenium Nanoparticles ◽  
Onset Potential ◽  
Ru Nanoparticles

AbstractIn this paper we described using ruthenium (Ru) nanoparticles for surface modification on our hybrid PV/a-SiC photocathode for hydrogen production by water splitting under sunlight. Ru nanoparticles with size less than 5nm in diameter made the photocathode showed promising results: in an aqueous electrolyte an anodic shift of photocurrent onset potential around 450 mV and an increase in the photocurrent density up to 1.8mA/cm2 from a negligible value. Initial discussion the influence of Ru nanoparticles is presented.

scholarly journals High-performance and stable photoelectrochemical water splitting cell with organic-photoactive-layer-based photoanode

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Je Min Yu ◽  
Jungho Lee ◽  
Yoon Seo Kim ◽  
Jaejung Song ◽  
Jiyeon Oh ◽  
...  
Keyword(s):  
Water Splitting ◽  
Organic Semiconductors ◽  
High Performance ◽  
Energy Levels ◽  
Photocurrent Density ◽  
Hydrogen Electrode ◽  
Photoactive Layer ◽  
Onset Potential ◽  
The Stability ◽  
Double Hydroxides

Abstract Considering their superior charge-transfer characteristics, easy tenability of energy levels, and low production cost, organic semiconductors are ideal for photoelectrochemical (PEC) hydrogen production. However, organic-semiconductor-based photoelectrodes have not been extensively explored for PEC water-splitting because of their low stability in water. Herein, we report high-performance and stable organic-semiconductors photoanodes consisting of p-type polymers and n-type non-fullerene materials, which is passivated using nickel foils, GaIn eutectic, and layered double hydroxides as model materials. We achieve a photocurrent density of 15.1 mA cm−2 at 1.23 V vs. reversible hydrogen electrode (RHE) with an onset potential of 0.55 V vs. RHE and a record high half-cell solar-to-hydrogen conversion efficiency of 4.33% under AM 1.5 G solar simulated light. After conducting the stability test at 1.3 V vs. RHE for 10 h, 90% of the initial photocurrent density are retained, whereas the photoactive layer without passivation lost its activity within a few minutes.

scholarly journals Synthesis of ZnIn2S4@Co3S4 particles derived from ZIF-67 for photocatalytic hydrogen production

RSC Advances ◽  
2021 ◽  
Vol 11 (16) ◽  
pp. 9296-9302
Author(s):  
Ganyu Wang ◽  
Wenqian Chen ◽  
Yu Zhang ◽  
Qinshang Xu ◽  
Yirui Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Superior Performance ◽  
High Catalytic Activity ◽  
Photocatalytic Hydrogen Production ◽  
Photocatalytic Hydrogen Evolution ◽  
Adsorption Sites ◽  
Morphology And Structure ◽  
Hydrogen Evolution Reactions

Appropriate morphology and structure can provide more charge adsorption sites which contribute to high catalytic activity, ZnIn2S4 with the coupling amount of 5% Co3S4 displays superior performance in the photocatalytic hydrogen evolution reactions.

scholarly journals Plasma-Deposited Ru-Based Thin Films for Photoelectrochemical Water Splitting

Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 278 ◽  
Author(s):  
Lukasz Jozwiak ◽  
Jacek Balcerzak ◽  
Jacek Tyczkowski
Keyword(s):  
Water Splitting ◽  
Photoelectron Spectroscopy ◽  
Chemical Vapor ◽  
Linear Sweep Voltammetry ◽  
Photocurrent Density ◽  
Electrochemical Process ◽  
High Catalytic Activity ◽  
Metallic State ◽  
Hydrogen Electrode ◽  
Interesting Candidate

Plasma-enhanced chemical vapor deposition (PECVD) was used to produce new Ru-based thin catalytic films. The surface molecular structure of the films was examined by X-ray photoelectron spectroscopy (XPS). To determine the electro- and photoelectrochemical properties, the oxygen evolution reaction (OER) process was investigated by linear sweep voltammetry (LSV) at pH = 13.6. It was found that Ru atoms were mainly in the metallic state (Ru0) in the as-deposited films, whereas after the electrochemical stabilization, higher oxidation states, mainly Ru+4 (RuO2), were formed. The stabilized films exhibited high catalytic activity in OER—for the electrochemical process, the onset and η10 overpotentials were approx. 220 and 350 mV, respectively, while for the photoelectrochemical process, the pure photocurrent density of about 160 mA/cm2 mg was achieved at 1.6 V (vs. reversible hydrogen electrode (RHE)). The plasma-deposited RuOX catalyst appears to be an interesting candidate for photoanode material for photoelectrochemical (PEC) water splitting.

scholarly journals Room Temperature Surface Modification of Ultrathin FeOOH Cocatalysts on Fe2O3 Photoanodes for High Photoelectrochemical Water Splitting

2020 ◽  
Vol 2020 ◽  
pp. 1-7 ◽  
Author(s):  
Yiqing Wei ◽  
Aizhen Liao ◽  
Lu Wang ◽  
Xiaoyong Wang ◽  
Dunhui Wang ◽  
...  
Keyword(s):  
Water Splitting ◽  
Room Temperature ◽  
Photocurrent Density ◽  
Reversible Hydrogen Electrode ◽  
Interfacial Resistance ◽  
Hydrogen Electrode ◽  
Onset Potential ◽  
Temperature Surface ◽  
Excellent Stability ◽  
Pec Water Splitting

An ultrathin FeOOH cocatalyst is deposited on α-Fe2O3 photoanodes in a simple room temperature immersion process for efficient photoelectrochemical (PEC) water splitting. The prepared FeOOH/Fe2O3 photoanode has a photocurrent density of up to 2.4 mA/cm2 at 1.23 V versus reversible hydrogen electrode (RHE), and the photocurrent density is increased by about 160% compared to the bare Fe2O3 of 1.55 mA/cm2. An obvious cathodic shift of the photocurrent onset potential from 0.661 to 0.582 V was also observed, and excellent stability was maintained with almost no deterioration for 5 h. The enhanced PEC performance is attributed to the decrease of the interfacial resistance between electrode and electrolyte and the increase of the injection efficiency of holes in Fe2O3.

Fabrication of 3D hierarchical Fe2O3/SnO2 photoanode for enhanced photoelectrochemical performance

2022 ◽  
Author(s):  
Xing Zhang ◽  
Hao Chen ◽  
Wei Zhang ◽  
Lina Zhang ◽  
Xinyu Liu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Photocurrent Density ◽  
Annealing Process ◽  
High Catalytic Activity ◽  
X Ray Diffraction ◽  
Photoelectrochemical Performance ◽  
Hydrothermal Route ◽  
Hydrogen Electrode ◽  
X Ray ◽  
Transmission Electron

Abstract Exploring and fabricating a suitable photoanode with high catalytic activity is critical for enhancing photoelectrochemical (PEC) performance. Herein, a novel 3D hierarchical Fe2O3/SnO2 photoanode was fabricated by a hydrothermal route, combining with an annealing process. The morphology, crystal structure were studied by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photon spectroscopy (XPS), and X-ray diffraction (XRD), respectively. The results reveal the successful preparation of Fe2O3 nanothorns on the surface of SnO2 nanosheets. The as-fabricated 3D Fe2O3/SnO2 photoanode yields obviously promoted PEC performance with a photocurrent density of approximate 5.85 mA cm-2, measured in a mixture of Na2S (0.25 M) and Na2SO3 (0.35 M) aqueous solution at 1.23 V (vs. reversible hydrogen electrode, RHE). This value of photocurrent is about 53 times higher than that of the bare SnO2 photoanode. The obvious improved PEC properties can be attributed to the 3D Fe2O3/SnO2 heterostructures that offer outstanding light harvesting ability as well as improved charge transport and separation. These results suggest that exploring a suitable 3D hierarchical photoanode is an effective approach to boost PEC performance.approach to boost PEC performance.

scholarly journals Dye-Sensitized Nanocrystalline ZnO Solar Cells Based on Ruthenium(II) Phendione Complexes

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Hashem Shahroosvand ◽  
Parisa Abbasi ◽  
Mohsen Ameri ◽  
Mohammad Reza Riahi Dehkordi
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Conversion Efficiency ◽  
Short Circuit ◽  
Photocurrent Density ◽  
Open Circuit ◽  
Zno Thin Film ◽  
Photovoltaic Properties ◽  
Dye Sensitized ◽  
Ft Ir

The metal complexes ( (phen)2(phendione))(PF6)2(1), [ (phen)(bpy)(phendione))(PF6)2(2), and ( (bpy)2(phendione))(PF6)2(3) (phen = 1,10-phenanthroline, bpy = 2,2′-bipyridine and phendione = 1,10-phenanthroline-5,6-dione) have been synthesized as photo sensitizers for ZnO semiconductor in solar cells. FT-IR and absorption spectra showed the favorable interfacial binding between the dye-molecules and ZnO surface. The surface analysis and size of adsorbed dye on nanostructure ZnO were further examined with AFM and SEM. The AFM images clearly show both, the outgrowth of the complexes which are adsorbed on ZnO thin film and the depression of ZnO thin film. We have studied photovoltaic properties of dye-sensitized nanocrystalline semiconductor solar cells based on Ru phendione complexes, which gave power conversion efficiency of (η) of 1.54% under the standard AM 1.5 irradiation (100 mW cm−2) with a short-circuit photocurrent density () of 3.42 mA cm−2, an open-circuit photovoltage () of 0.622 V, and a fill factor (ff) of 0.72. Monochromatic incident photon to current conversion efficiency was 38% at 485 nm.

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