scholarly journals Tunning of Templated CuWO4 Nanorods Arrays Thickness to Improve Photoanode Water Splitting

Molecules ◽  
2021 ◽  
Vol 26 (10) ◽  
pp. 2900
Author(s):  
Nasori Nasori ◽  
Dawei Cao ◽  
Zhijie Wang ◽  
Ulya Farahdina ◽  
Agus Rubiyanto ◽  
...  
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Anodic Aluminum Oxide ◽  
Flat Band ◽  
Nanorod Arrays ◽  
Solar Simulator ◽  
Anodic Aluminum ◽  
Effectiveness And Efficiency ◽  
First Time ◽  
A Current

The fabrication of the photoanode of the n-type CuWO4 nanorod arrays was successfully carried out through electrochemical deposition using anodic aluminum oxide (AAO) control templates and for the first time produced distinct gaps between the nanorod arrays. The effectiveness and efficiency of the resulting deposition was shown by the performance of the photoelectrochemical (PEC) procedure with a current density of 1.02 mA cm−2 with irradiation using standard AM 1.5G solar simulator and electron changed radiation of 0.72% with a bias potential of 0.71 V (vs. Ag/AgCl). The gap between each nanorod indicated an optimization of the electrolyte penetration on the interface, which resulted in the expansion of the current density as much as 0.5 × 1024 cm−3 with a flat band potential of 0.14 V vs. Ag/AgCl and also a peak quantum efficiency of wavelength 410 nm. Thus, also indicating the gaps between the nanorod arrays is a promising structure to optimize the performance of the PEC water splitting procedure as a sustainable energy source.

scholarly journals Nanocrystalline TiO2Electrodes Exhibiting High Storage Capacity and Stability in Rechargeable Lithium Batteries

1995 ◽  
Vol 18 (1) ◽  
pp. 23-30 ◽  
Author(s):  
Sui-Yang Huang ◽  
Ladislav Kavan ◽  
Andreas Kay ◽  
Michael Grätzel ◽  
Ivan Exnar
Keyword(s):  
Current Density ◽  
High Current Density ◽  
Discharge Voltage ◽  
Unit Weight ◽  
Nanocrystalline Films ◽  
Rechargeable Lithium Batteries ◽  
Capacity Loss ◽  
High Storage Capacity ◽  
First Time ◽  
A Current

Nanocrystalline TiO2films were explored for the first time as electrode material for a rechargeable lithium intercalation cell, i.e., Li/LiCF3SO3+ PC/TiO2. Two kinds of nanocrystalline films, TiO2F387 (Degussa) and TiO2colloid-240, were investigated. These films exhibited excellent performance renderings them a promising choice for secondary battery applications. At a current density of 0.01 mA/cm2, two voltage plateaus at 1.78 and 1.89 V were observed for TiO2F387 films during charge and discharge, respectively. The TiO2electrode charge capacity per unit weight rose with decreasing current density. The highest capacity, obtained at a current density of 0.005 mA/cm2and a final discharge voltage of 1.4 V, was 265 mAh/g corresponding to a lithium insertion ratio ofx= 0.8. Nanocrystalline TiO2colloid-240 films showed a similar performance. The cycle life of a TiO2colloid-240 cell at a high current density was found to be excellent; a capacity loss lower than 14% has been observed over 100 charge/discharge cycles.

Controlled synthesis of Co3O4@NiMoO4 core–shell nanorod arrays for efficient water splitting

2018 ◽  
Vol 47 (35) ◽  
pp. 12071-12074 ◽  
Author(s):  
Xiaoqiang Du ◽  
Nai Li ◽  
Xiaoshuang Zhang
Keyword(s):  
Water Splitting ◽  
Nickel Foam ◽  
Core Shell ◽  
Controlled Synthesis ◽  
Nanorod Arrays ◽  
Earth Abundant ◽  
First Time

We reported for the first time the development of Co3O4@NiMoO4 nanorod arrays on nickel foam (Co3O4@NiMoO4/NF) as a robust Earth-abundant electrocatalyst for water splitting.

An advanced and highly efficient Ce assisted NiFe-LDH electrocatalyst for overall water splitting

2020 ◽  
Vol 4 (1) ◽  
pp. 312-323 ◽  
Author(s):  
Harsharaj S. Jadhav ◽  
Animesh Roy ◽  
Bezawit Z. Desalegan ◽  
Jeong Gil Seo
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Room Temperature ◽  
Cell Voltage ◽  
Highly Efficient ◽  
Overall Water Splitting ◽  
A Cell ◽  
A Current

A room-temperature synthesized NiFeCe2 electrocatalyst delivered a current density of 10 mA cm−2 at a cell voltage of 1.59 V when used as the electrolyzer.

Efficient bifunctional catalysts for overall water splitting: porous Fe–Mo oxide hybrid nanorods

Nanoscale ◽  
2020 ◽  
Vol 12 (13) ◽  
pp. 7116-7123 ◽  
Author(s):  
Wei Chen ◽  
Guangfu Qian ◽  
Qinglian Xu ◽  
Chen Yu ◽  
Mengya Yu ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Water Splitting ◽  
Current Density ◽  
Bifunctional Catalysts ◽  
Binary Metal ◽  
Overall Water Splitting ◽  
Binary Metal Oxide ◽  
A Current

In this work, binary metal oxide porous nanorods are synthesized and exhibit evidently small overpotentials for OER and HER. They also display remarkable stability by holding a current density of ±200 mA cm−2 for 85 h for OER/HER.

Research on Effect of Erbium Salt in the Anodization of Aluminum

2011 ◽  
Vol 413 ◽  
pp. 300-303
Author(s):  
Xiao Zhen Liu ◽  
Liang Wei Zhu ◽  
Gang Wang ◽  
Ling Ling Song ◽  
Xiao Yun Tang
Keyword(s):  
Heat Treatment ◽  
Acid Solution ◽  
Aluminum Oxide ◽  
Heat Treatment Temperature ◽  
Anodic Aluminum Oxide ◽  
Sulphuric Acid Solution ◽  
Treatment Temperature ◽  
Anodic Aluminum ◽  
First Time ◽  
Anodization Method

Erbium salt was used as additives for the first time in preparing anodic aluminum oxide (AAO) films to improve its performance. AAO films were prepared from a 15 vol. % sulphuric acid solution containing erbium salt by anodization method; the effects of concentration of erbium on microhardness and thickness of AAO film were researched, respectively. The effect of heat treatment temperature on structure of AAO film was researched. AAO films were characterized by XRD, EDAX and SEM techniques, respectively. The microhardness and thickness of AAO film were 378.5HV and 82μm respectively, which were higher 12.99% and 17.14% than those of the film prepared in electrolyte of nothing addition erbium salt respectively. The aperture of AAO film was more uniform and the surface of AAO film was smoother than those of films prepared in electrolyte of nothing addition erbium salt. The apertures of AAO film were in 25~30nm. There was not erbium in AAO film. AAO films were amorphous when heat treatment temperatures of AAO film were below 800°C, when heat treatment temperature of AAO film were 850°C and 1000°C respectively, and AAO films were γ-Al2O3and α-Al2O3film respectively.

High-performance overall water splitting based on amorphous iron doped cobalt tungstate via facile co-precipitation

2021 ◽  
Vol 9 (15) ◽  
pp. 9753-9760
Author(s):  
Jin Wu ◽  
Renjie Xie ◽  
Xiangchen Hu ◽  
Zhiwei Nie ◽  
Yanuo Shi ◽  
...  
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
High Performance ◽  
Amorphous Iron ◽  
Bifunctional Electrocatalyst ◽  
Overall Water Splitting ◽  
Iron Doped ◽  
Cobalt Tungstate ◽  
Co Precipitation ◽  
A Current

The as-prepared amorphous Fe-doped CoWO4 bifunctional electrocatalyst shows a low overpotential of 259 and 118 mV to reach a current density of 10 mA cm−2 for the OER and HER in 1 M KOH, respectively.

scholarly journals Анодный оксид алюминия, сформированный в водных растворах хелатных комплексных соединений цинка и кобальта

2021 ◽  
Vol 91 (10) ◽  
pp. 1479
Author(s):  
А.А. Позняк ◽  
G.H. Knornschild ◽  
А.Н. Плиговка ◽  
Т.Д. Ларин
Keyword(s):  
Aluminum Oxide ◽  
Current Density ◽  
High Purity ◽  
Anodic Aluminum Oxide ◽  
Complex Compounds ◽  
Electrochemical Process ◽  
Anodic Aluminum ◽  
High Purity Aluminum ◽  
Ir Spectroscopic ◽  
Kinetic Features

The galvanostatic anodizing results of specially prepared high-purity aluminum in aqueous solutions of complex compounds K3[Co(C2O4)3] and K2[Zn(edta)] of various concentrations in the current density ranges 1.5–1.10·102 and 1.5−30 mA·сm−2, respectively. The kinetic features of anodizing have been established, indicating the occurrence of an oscillatory electrochemical process. Morphological features of a flaky and loose nature for K2[Zn(edta)] and monolithic for K3[Co(C2O4)3], uncharacteristic for anodic aluminum oxide, were revealed. The elemental composition, IR spectroscopic and photoluminescent characteristics of the formed oxides are shown.

scholarly journals TiO2 Nanorods Prepared from Anodic Aluminum Oxide Template and their Applications in Dye-Sensitized Solar Cells

2015 ◽  
Vol 46 ◽  
pp. 30-36 ◽  
Author(s):  
Methawee Nukunudompanich ◽  
Surawut Chuangchote ◽  
Jatuporn Wootthikanokkhan ◽  
Yoshikazu Suzuki
Keyword(s):  
Aluminum Oxide ◽  
Current Density ◽  
Anodic Aluminum Oxide ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Precursor Solution ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Dye Sensitized ◽  
Anodic Aluminum

Anodic aluminum oxide (AAO) was used as a template coupled with liquid process for synthesis of TiO2 nanorods. Immersion setting (IS) was carried out to insert a TiO2 precursor solution into AAO pore. With the calcination and NaOH treatment to remove AAO, SEM characterization revealed that TiO2 nanorods with diameter around 100-200 nm were successfully fabricated from AAO commercial templates. The synthesized nanorods mixed with commercial TiO2 nanoparticles (P-25) with a mixing ratio of 5:95 (by mass) were used as an electrode in a dye-sensitized solar cell (DSSC), The photoelectrodes made with nanorods showed a better performance than the cells used of only pristine TiO2 nanoparticles. The results from current density-voltage (J-V) characteristics of DSSCs showed that short-circuit current density (JSC), open-circuit voltage (VOC), fill factor (FF), and power conversion efficiency (PCE) are 11.78 mA/cm2, 0.72 V, 0.55, and 4.68%, respectively. Due to the effects of one-dimensional (1-D) nanostructure, the electron expressway concept was achieved in this research.

Industrially promising NiCoP nanorod arrays tailored with trace W and Mo atoms for boosting large-current-density overall water splitting

Nanoscale ◽  
2021 ◽  
Author(s):  
Xin Guo ◽  
Menggang Li ◽  
Lin He ◽  
Shuo Geng ◽  
Fenyang Tian ◽  
...  
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Nanorod Arrays ◽  
Overall Water Splitting ◽  
Large Current ◽  
Large Current Density ◽  
High Overpotentials ◽  
Current Densities

Nanoarray catalysts supported on the substrates provide an opportunity for industrially promising overall water splitting at large-current-densities. However, most of the present electrocatalysts show high overpotentials at a large current...

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