Towards zero bias photoelectrochemical water splitting: onset potential improvement on a Mg:GaN modified-Ta3N5 photoanode

2018 ◽  
Vol 6 (31) ◽  
pp. 15265-15273 ◽  
Author(s):  
Ela Nurlaela ◽  
Yutaka Sasaki ◽  
Mamiko Nakabayashi ◽  
Naoya Shibata ◽  
Taro Yamada ◽  
...  
Keyword(s):  
Water Splitting ◽  
Photoelectrochemical Water Splitting ◽  
Electron Hole ◽  
Zero Bias ◽  
Hole Transfer ◽  
Potential Shift ◽  
Onset Potential ◽  
Potential Improvement ◽  
Mg Doped

A remarkable onset potential shift has been demonstrated on Ta3N5 modified with a Mg:GaN layer. The Mg-doped GaN band positions facilitate more efficient electron/hole transfer to/from Ta3N5, inducing a negative onset potential shift to 0 vs. RHE.

Mo-doped BiVO4 thin films – high photoelectrochemical water splitting performance achieved by a tailored structure and morphology

2017 ◽  
Vol 1 (8) ◽  
pp. 1830-1846 ◽  
Author(s):  
Martin Rohloff ◽  
Björn Anke ◽  
Siyuan Zhang ◽  
Ulrich Gernert ◽  
Christina Scheu ◽  
...  
Keyword(s):  
Thin Films ◽  
Water Splitting ◽  
Sol Gel ◽  
Surface Recombination ◽  
Photoelectrochemical Water Splitting ◽  
Transfer Efficiency ◽  
Hole Transfer ◽  
Structure And Morphology ◽  
Sol Gel Synthesis ◽  
Reduced Surface

Facile sol–gel synthesis of Mo:BiVO4 thin films with optimized morphology results in reduced surface recombination and enhanced hole transfer efficiency.

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.

Serial hole transfer layers for a BiVO4 photoanode with enhanced photoelectrochemical water splitting

Nanoscale ◽  
2018 ◽  
Vol 10 (38) ◽  
pp. 18378-18386 ◽  
Author(s):  
Linsen Li ◽  
Jinhua Li ◽  
Jing Bai ◽  
Qingyi Zeng ◽  
Ligang Xia ◽  
...  
Keyword(s):  
Water Splitting ◽  
Photoelectrochemical Water Splitting ◽  
Hole Transfer

The performance of BiVO4 was highly enhanced by serial hole transfer layers of Fe2O3 and NiOOH/FeOOH.

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.

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

Collision induced charge separation in ground-state water splitting dynamics

2018 ◽  
Vol 20 (17) ◽  
pp. 12229-12240 ◽  
Author(s):  
Kentaro Yamamoto ◽  
Kazuo Takatsuka
Keyword(s):  
Water Splitting ◽  
Ground State ◽  
Charge Separation ◽  
Electron Hole ◽  
Hole Transfer ◽  
State Water ◽  
Induced Charge ◽  
State Charge

The pathway of one-way electron–hole transfer induced by proton reciprocating motions, thereby realizing the collision induced ground-state charge separation.

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.

Characteristics of crystalline sputtered LaFeO3 thin films as photoelectrochemical water splitting photocathodes

Nanoscale ◽  
2020 ◽  
Vol 12 (17) ◽  
pp. 9653-9660 ◽  
Author(s):  
Min-Kyu Son ◽  
Hyunwoong Seo ◽  
Motonori Watanabe ◽  
Masaharu Shiratani ◽  
Tatsumi Ishihara
Keyword(s):  
Thin Films ◽  
Water Splitting ◽  
Early Onset ◽  
Photoelectrochemical Water Splitting ◽  
Onset Potential

A transparent crystalline sputtered LaFeO3 photocathode with an early onset potential for stable photoelectrochemical water splitting.

scholarly journals Radiative and Non-Radiative Recombination Pathways in Mixed-Phase TiO2 Nanotubes for PEC Water-Splitting

Catalysts ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 204 ◽  
Author(s):  
Rambabu Yalavarthi ◽  
Alberto Naldoni ◽  
Štěpán Kment ◽  
Luca Mascaretti ◽  
Hana Kmentová ◽  
...  
Keyword(s):  
Water Splitting ◽  
Water Oxidation ◽  
Transfer Rate ◽  
Electrochemical Impedance ◽  
Mixed Phase ◽  
Transfer Efficiency ◽  
Electron Hole ◽  
Surface Trap ◽  
Hole Transfer ◽  
Recombination Processes

Anatase and rutile mixed-phase TiO2 with an ideal ratio has been proven to significantly enhance photoelectrochemical (PEC) activity in water-splitting applications due to suppressing the electron–hole recombination. However, the mechanism of this improvement has not been satisfactory described yet. The PEC water oxidation (oxygen evolution) at the interface of TiO2 photoanode and electrolyte solution is determined by the fraction of the photogenerated holes that reach the solution and it is defined as the hole transfer efficiency. The surface and bulk recombination processes in semiconductor photoanodes majorly influence the hole transfer efficiency. In this work, we study the hole transfer process involved in mixed-phase TiO2 nanotube arrays/solution junction using intensity-modulated photocurrent and photovoltage spectroscopy (IMPS and IMVS); then, we correlate the obtained hole transfer rate constants to (photo)electrochemical impedance spectroscopy (PEIS) measurements. The results suggest that the enhanced performance of the TiO2 mixed-phase is due to the improved hole transfer rate across the TiO2/liquid interface as well as to the decrease in the surface trap recombination of the holes.

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