Photoelectrochemical water splitting at low applied potential using a NiOOH coated codoped (Sn, Zr) α-Fe2O3 photoanode

2015 ◽  
Vol 3 (11) ◽  
pp. 5949-5961 ◽  
Author(s):  
Andebet Gedamu Tamirat ◽  
Wei-Nien Su ◽  
Amare Aregahegn Dubale ◽  
Hung-Ming Chen ◽  
Bing-Joe Hwang
Keyword(s):  
Water Splitting ◽  
Photoelectrochemical Water Splitting ◽  
Applied Potential ◽  
Photoelectrochemical Performance ◽  
Onset Potential

We synthesized a NiOOH decorated codoped (Sn, Zr) α-Fe2O3 photoanode that results in enhanced photoelectrochemical performance and drastically lower onset potential.

One-Dimensional TiO2@GaON Core-Shell Nanowires with Controlled Shell Thickness from Atomic Layer Deposition for Stable and Efficient Photoelectrochemical Water Splitting

2019 ◽  
Author(s):  
Jiajia Tao ◽  
Hong-Ping Ma ◽  
Kaiping Yuan ◽  
Yang Gu ◽  
Jianwei Lian ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Band Gap ◽  
Water Splitting ◽  
Atomic Layer ◽  
Photoelectrochemical Water Splitting ◽  
Core Shell ◽  
Photoelectrochemical Performance ◽  
Highly Efficient ◽  
Layer Deposition ◽  
Shell Nanowires

<div>As a promising oxygen evolution reaction semiconductor, TiO2 has been extensively investigated for solar photoelectrochemical water splitting. Here, a highly efficient and stable strategy for rationally preparing GaON cocatalysts on TiO2 by atomic layer deposition is demonstrated, which we show significantly enhances the</div><div>photoelectrochemical performance compared to TiO2-based photoanodes. For TiO2@20 nm-GaON core-shell nanowires a photocurrent density up to 1.10 mA cm-2 (1.23 V vs RHE) under AM 1.5 G irradiation (100 mW cm-2) has been achieved, which is 14 times higher than that of TiO2 NWs. Furthermore, the oxygen vacancy formation on GaON as well as the band gap matching with TiO2 not only provides more active sites for water oxidation but also enhances light absorption to promote interfacial charge separation and migration. Density functional theory studies of model systems of GaON-modified TiO2 confirm the band gap reduction, high reducibility and ability to activate water. The highly efficient and stable systems of TiO2@GaON core-shell nanowires provide a deeper understanding and universal strategy for enhancing photoelectrochemical performance of photoanodes now available. </div>

Defective Fe3+ self-doped spinel ZnFe2O4 with oxygen vacancies for highly efficient photoelectrochemical water splitting

2019 ◽  
Vol 48 (31) ◽  
pp. 11934-11940 ◽  
Author(s):  
Jianmin Wang ◽  
Yunan Wang ◽  
Xinchao Xv ◽  
Yan Chen ◽  
Xi Yang ◽  
...  
Keyword(s):  
Water Splitting ◽  
Oxygen Vacancies ◽  
Photoelectrochemical Water Splitting ◽  
Photoelectrochemical Performance ◽  
Highly Efficient

Defective Fe3+ self-doped spinel ZnFe2O4 with abundant oxygen vacancies exhibits largely enhanced photoelectrochemical performance.

Cadmium Sulphide Sensitized Crystal Facet Tailored Nanostructured Nickel Ferrite @ Hematite Core-Shell Ternary Heterojunction Photoanode for Photoelectrochemical Water Splitting

MRS Advances ◽  
2020 ◽  
Vol 5 (50) ◽  
pp. 2585-2593
Author(s):  
Soumyajit Maitra ◽  
Arundhati Sarkar ◽  
Toulik Maitra ◽  
Somoprova Halder ◽  
Subhasis Roy ◽  
...  
Keyword(s):  
Water Splitting ◽  
Cadmium Sulphide ◽  
Band Alignment ◽  
Photoelectrochemical Water Splitting ◽  
Cds Nanoparticles ◽  
Core Shell ◽  
Xenon Lamp ◽  
Photoelectrochemical Performance ◽  
Crystal Facet ◽  
Hydrothermal Approach

AbstractDesign of composite semiconductor nanostructures with proper band alignment for efficient charge separation and carrier transport has been at the center of research for photoelectrochemical water splitting. This work demonstrates the deposition of a NiFe2O4 @Fe2O3 core-shell nanostructured film sensitized with CdS to form a ternary heterojunction for cascade type electron transfer. The hematite nanostructures were grown by hydrothermal approach through dipping into a solution of Nickel Nitrate yielded anchoring of Ni2+ ions on the outer surface. The films were then annealed at 650 0C for the diffusion of Ni2+ ions into the hematite lattice which forms core-shell NiFe2O4 @Fe2O3 heterojunction. The films were further sensitized with CdS nanoparticles deposited by a hydrothermal approach to form the final ternary heterojunction photoanode. Several different nanostructures were grown and the effect of crystal facet tailoring was observed on Ni loading and photoelectrochemical performance. The photoelectrochemical measurements were carried out using a potentiostat under 100 mW/cm2 light source (150W Xenon Lamp) with Pt counter electrode and 0.5 M Na2S and 0.5 M Na2SO3 electrolyte. A current density of 3.47 mA/cm2 was observed at 1.23 V (vs Ag/AgCl). An Applied Bias to Photocurrent Efficiency (ABPE) of 1.8 % photoconversion efficiency was observed using the fabricated electrodes at 0.288V (vs Ag/AgCl).

Orientation modulated charge transport in hematite for photoelectrochemical water splitting

2016 ◽  
Vol 09 (03) ◽  
pp. 1650047 ◽  
Author(s):  
Jiajia Cai ◽  
Yinglei Liu ◽  
Song Li ◽  
Meiqi Gao ◽  
Dunwei Wang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Single Crystal ◽  
Charge Transport ◽  
Water Splitting ◽  
High Magnetic Field ◽  
Current Method ◽  
Photoelectrochemical Water Splitting ◽  
Photoelectrochemical Performance

Hematite is currently considered one of the most promising photoanode materials for light-driven water splitting. The photoelectrochemical performance of hematite is limited by its low conductivity. In this work, we demonstrate that the conductivity of hematite films can be tuned by controlling the orientation of hematite crystals. By applying a high magnetic field (up to 10 T) during the drop-casting preparation, hematite films composed of single crystal particles show featured texture by promoting those particles alignment with (001) normal to the substrate. By enhancing the photocurrent densities with tuned hematite orientation, the current method provides an effective way for increasing the number of carriers that can reach the surface.

scholarly journals A significant cathodic shift in the onset potential of photoelectrochemical water splitting for hematite nanostructures grown from Fe–Si alloys

2014 ◽  
Vol 1 (3) ◽  
pp. 344-347 ◽  
Author(s):  
Lei Wang ◽  
Chong-Yong Lee ◽  
Robin Kirchgeorg ◽  
Helga Hildebrand ◽  
Julian Müller ◽  
...  
Keyword(s):  
Thermal Oxidation ◽  
Water Splitting ◽  
Photoelectrochemical Water Splitting ◽  
Onset Potential

Thermal oxidation of Fe to nanostructured hematite (wires, flakes) is currently widely investigated to produce efficient photoanodes for photoelectrochemical water splitting.

Morphology-tunable synthesis of ZnO nanoforest and its photoelectrochemical performance

Nanoscale ◽  
2014 ◽  
Vol 6 (15) ◽  
pp. 8769-8780 ◽  
Author(s):  
Xing Sun ◽  
Qiang Li ◽  
Jiechao Jiang ◽  
Yuanbing Mao
Keyword(s):  
Water Splitting ◽  
Photoelectrochemical Water Splitting ◽  
Controlled Synthesis ◽  
Zno Nanostructures ◽  
Photoelectrochemical Performance ◽  
Hydrothermal Route ◽  
Facile Hydrothermal Route ◽  
Architectural Characteristics

The morphology-controlled synthesis of ZnO nanoforests is achieved via a facile hydrothermal route based on the respective and synergistic influence of polyethylenimine (PEI) and ammonia. More importantly, the unique architectural characteristics endow the willow-like ZnO nanoforest with prominent photoelectrochemical water splitting performance, which leads to the realm of homogeneous ZnO nanostructures.

Mg–Zr Cosubstituted Ta3N5 Photoanode for Lower-Onset-Potential Solar-Driven Photoelectrochemical Water Splitting

2015 ◽  
Vol 137 (40) ◽  
pp. 12780-12783 ◽  
Author(s):  
Jeongsuk Seo ◽  
Tsuyoshi Takata ◽  
Mamiko Nakabayashi ◽  
Takashi Hisatomi ◽  
Naoya Shibata ◽  
...  
Keyword(s):  
Water Splitting ◽  
Photoelectrochemical Water Splitting ◽  
Onset Potential

Overall photoelectrochemical water splitting at low applied potential over ZnO quantum dots/nanorods homojunction

2019 ◽  
Vol 368 ◽  
pp. 746-753 ◽  
Author(s):  
Ying-Chu Chen ◽  
Kun-Hao Yang ◽  
Chun-Yuan Huang ◽  
Zhi-Jie Wu ◽  
Yu-Kuei Hsu
Keyword(s):  
Quantum Dots ◽  
Water Splitting ◽  
Photoelectrochemical Water Splitting ◽  
Applied Potential ◽  
Zno Quantum Dots

scholarly journals A nanostructured NiO/cubic SiC p–n heterojunction photoanode for enhanced solar water splitting

2019 ◽  
Vol 7 (9) ◽  
pp. 4721-4728 ◽  
Author(s):  
Jingxin Jian ◽  
Yuchen Shi ◽  
Sebastian Ekeroth ◽  
Julien Keraudy ◽  
Mikael Syväjärvi ◽  
...  
Keyword(s):  
Water Splitting ◽  
Fill Factor ◽  
Photoelectrochemical Water Splitting ◽  
Onset Potential ◽  
Solar Water ◽  
Solar Water Splitting

A 3C-SiC/NiO p–n heterojunction photoanode exhibits a substantially improved photoelectrochemical water-splitting performance in terms of photocurrent, onset potential and fill-factor.

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