Fabrication of nanostructured α-Fe2O3 electrodes using ferrocene for solar hydrogen generation

Saremi‐Yarahmadi, Sina; Tahir, Asif Ali; Vaidhyanathan, Bala; Wijayantha, K. G. Upul

doi:10.1016/j.matlet.2008.11.011

Cited by 54 publications

(37 citation statements)

References 18 publications

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“…[69,113] In continuing work with this deposition technique ferrocene and tetramethyl orthosilicate (TMOS) were found to be viable sources of iron and silicon, respectively. [117][118] The use of ferrocene is notable for replacing the toxic iron pentacarbonyl, however the photocurrent density obtained remained less than 1 mA cm…”

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confidence: 99%

Solar Water Splitting: Progress Using Hematite (α‐Fe₂O₃) Photoelectrodes

2011

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Photoelectrochemical (PEC) cells offer the ability to convert electromagnetic energy from our largest renewable source, the Sun, to stored chemical energy through the splitting of water into molecular oxygen and hydrogen. Hematite (α-Fe(2)O(3)) has emerged as a promising photo-electrode material due to its significant light absorption, chemical stability in aqueous environments, and ample abundance. However, its performance as a water-oxidizing photoanode has been crucially limited by poor optoelectronic properties that lead to both low light harvesting efficiencies and a large requisite overpotential for photoassisted water oxidation. Recently, the application of nanostructuring techniques and advanced interfacial engineering has afforded landmark improvements in the performance of hematite photoanodes. In this review, new insights into the basic material properties, the attractive aspects, and the challenges in using hematite for photoelectrochemical (PEC) water splitting are first examined. Next, recent progress enhancing the photocurrent by precise morphology control and reducing the overpotential with surface treatments are critically detailed and compared. The latest efforts using advanced characterization techniques, particularly electrochemical impedance spectroscopy, are finally presented. These methods help to define the obstacles that remain to be surmounted in order to fully exploit the potential of this promising material for solar energy conversion.

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confidence: 99%

Solar Water Splitting: Progress Using Hematite (α‐Fe₂O₃) Photoelectrodes

2011

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“…Apart from the nitrate salt, ferrocene is another Fe source that has been studied in various applications. Saremi Yarahmadi et al [33] found that the thin films prepared using ferrocene has increased the optical absorption due to higher packing density, and improved the measured photocurrent density.…”

Section: Ng Et Al: Fabrication and Characterization Of Fe-doped Tungsmentioning

confidence: 99%

FABRICATION AND CHARACTERIZATION OF Fe-DOPED TUNGSTEN TRIOXIDE PHOTOELECTRODES IN AQUEOUS MEDIUM USING TUNGSTIC ACID AND FERROCENE AS STARTING MATERIALS

Hang

Jaafar

Minggu³

et al. 2016

MJAS

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Different compositions of Fe-doped tungsten trioxide thin films were synthesized on fluorine-doped tin oxide (FTO) glass substrate by sol-gel method, with ferrocene and tungstic acid as starting materials. The synthesized thin films was characterized with X-ray diffraction (XRD), scanning electron microscope (SEM), UV/Vis spectrophotometer and photoelectrochemical (PEC) analysis. The results show that the surface morphology of the thin films became rough and the grain size increased along with the concentration of Fe. Monoclinic structure of tungsten trioxide was obtained for all doped and undoped WO 3 and red-shift can be observed from UV-vis spectrum. Band gap reduced from 2.74 eV of undoped WO 3 thin films to 2.60 eV of 20 % Fe-doped WO 3 thin films. Photoactivities of all Fe-doped WO 3 are higher than undoped thin films. The highest photoactivities contributed by 5 % Fe-doped WO 3 films with photocurrent densities measured was 0.148 mA/cm 2 , which is 3 times higher compared to undoped WO 3 .Keywords: Fe-doped WO 3 , direct water splitting, photoelectrochemical cell, photoanode Abstrak Filem nipis tungsten trioksida terdop Fe berbagai komposisi telah disediakan di atas kaca substrat FTO (fluorine-doped tin oxide) dengan kaedah sol-gel, dengan menggunakan ferosin dan asid tingstik sebagai bahan pemula. Filem nipis yang terhasil kemudiannya dicirikan dengan pembelauan sinar X (XRD), mikroskopi elektron pengimbasan (SEM), UV/Vis spektrofotometer dan analisis fotoelektrokimia. Keputusan menunjukkan bahawa morfologi permukaan filem nipis menjadi kasar dan saiz butiran bertambah dengan penambahan kepekatan Fe. Tungsten trioksida yang berstruktur monoklinik telah dihasilkan dan anjakan merah telah diperhatikan di dalam spectrum UV-vis. Jurang tenaga telah berkurang dari 2.74 eV (WO 3 tulen) kepada 2.60 eV (20 % Fe-dop WO 3 ). Fotoaktiviti WO 3 terdop Fe adalah lebih tinggi berbanding WO 3 tulen. Fotoaktiviti yang tertinggi dicatatkan oleh filem 5 % WO 3 terdop Fe dengan ketumpatan fotoarus 0.148 mA/cm 2 . Ia adalah 3 kali ganda lebih tinggi berbanding WO 3 tulen.Kata kunci: Fe-dop WO 3 , pembelahan air secara langsung, sel fotoelektrokimia, fotoanod

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“…In the rubber industry and construction engineering industry, Fe 2 O 3 can be used as colorant [7] of artificial marble, terrazzo floor, wall finishing paint. In the electronic telecommunications industry it is an important raw material in the manufacture of the ferrite element [8] . In the chemical industry, it is a catalyst [9] and chemical raw materials of the other iron production.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of α-Fe₂O₃Superfine Powders with Steel Pickling Waste Water and Dust Water in the Production of Bleaching Powder

Chen

et al. 2016

MATEC Web Conf.

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Abstract.A simple method of resource processing was developed by applying the material preparation technology to hazardous waste utilization. The iron oxide was synthesized by this method with steel pickling waste water and dust water in the production of bleaching powder. The effect of temperature on the synthesis was studied. X-Ray diffraction (XRD), transmission electron microscope (TEM) showed that the iron oxide samples are bright red and spherical Į-Fe 2 O 3 powders, and the particle size analysis exhibited that the size of samples prepared at 70 and 80 were between 250-300nm.

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Fabrication of nanostructured α-Fe2O3 electrodes using ferrocene for solar hydrogen generation

Cited by 54 publications

References 18 publications

Solar Water Splitting: Progress Using Hematite (α‐Fe₂O₃) Photoelectrodes

Solar Water Splitting: Progress Using Hematite (α‐Fe₂O₃) Photoelectrodes

FABRICATION AND CHARACTERIZATION OF Fe-DOPED TUNGSTEN TRIOXIDE PHOTOELECTRODES IN AQUEOUS MEDIUM USING TUNGSTIC ACID AND FERROCENE AS STARTING MATERIALS

Synthesis of α-Fe₂O₃Superfine Powders with Steel Pickling Waste Water and Dust Water in the Production of Bleaching Powder

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Fabrication of nanostructured α-Fe2O3 electrodes using ferrocene for solar hydrogen generation

Cited by 54 publications

References 18 publications

Solar Water Splitting: Progress Using Hematite (α‐Fe2O3) Photoelectrodes

Solar Water Splitting: Progress Using Hematite (α‐Fe2O3) Photoelectrodes

FABRICATION AND CHARACTERIZATION OF Fe-DOPED TUNGSTEN TRIOXIDE PHOTOELECTRODES IN AQUEOUS MEDIUM USING TUNGSTIC ACID AND FERROCENE AS STARTING MATERIALS

Synthesis of α-Fe2O3Superfine Powders with Steel Pickling Waste Water and Dust Water in the Production of Bleaching Powder

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Product

Resources

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Solar Water Splitting: Progress Using Hematite (α‐Fe₂O₃) Photoelectrodes

Solar Water Splitting: Progress Using Hematite (α‐Fe₂O₃) Photoelectrodes

Synthesis of α-Fe₂O₃Superfine Powders with Steel Pickling Waste Water and Dust Water in the Production of Bleaching Powder