Single-crystal N-doped SiC nanochannel array photoanode for efficient photoelectrochemical water splitting

2019 ◽  
Vol 7 (11) ◽  
pp. 3173-3180 ◽  
Author(s):  
Shanliang Chen ◽  
Lianfu Zhao ◽  
Lin Wang ◽  
Fengmei Gao ◽  
Weiyou Yang
Keyword(s):  
Single Crystal ◽  
Water Splitting ◽  
Photocurrent Density ◽  
Photoelectrochemical Water Splitting ◽  
Nanochannel Array

We investigated the photoelectrochemical water splitting of N-doped 4H-SiC nanochannel array photoanode with high photocurrent density and fast photoresponse.

Enhancing the quasi-theoretical photocurrent density of ZnO nanorods via a lukewarm hydrothermal method

Nanoscale ◽  
2020 ◽  
Vol 12 (23) ◽  
pp. 12292-12299
Author(s):  
Ying-Chu Chen ◽  
Zhi-Jie Wu ◽  
Yu-Kuei Hsu
Keyword(s):  
Hydrothermal Method ◽  
Water Splitting ◽  
Light Harvesting ◽  
Zno Nanorods ◽  
Photocurrent Density ◽  
Photoelectrochemical Water Splitting ◽  
Harvesting Efficiency ◽  
Light Harvesting Efficiency

Anti-reflection enhanced the light harvesting efficiency of a ∼10-μm-long 1D ZnO NRA, which is evidently manifested in the quasi-theoretical photocurrent density that reached ∼0.9 mA cm−2 for solar photoelectrochemical water splitting.

A g-C3N4/WO3 photoanode with exceptional ability for photoelectrochemical water splitting

2017 ◽  
Vol 1 (2) ◽  
pp. 338-342 ◽  
Author(s):  
Haibo Li ◽  
Fengyi Zhao ◽  
Jincheng Zhang ◽  
Lei Luo ◽  
Xujing Xiao ◽  
...  
Keyword(s):  
Water Splitting ◽  
Photocurrent Density ◽  
Photoelectrochemical Water Splitting ◽  
Pec Water Splitting

g-C3N4/WO3 heterojunctions with exceptional ability and stability for photoelectrochemical (PEC) water splitting which achieved a high photocurrent density.

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.

Sandwich structured WO3 nanoplatelets for highly efficient photoelectrochemical water splitting

2019 ◽  
Vol 7 (45) ◽  
pp. 26077-26088 ◽  
Author(s):  
Guangwei Zheng ◽  
Jinshu Wang ◽  
Guannan Zu ◽  
Haibing Che ◽  
Chen Lai ◽  
...  
Keyword(s):  
Water Splitting ◽  
Photocurrent Density ◽  
Photoelectrochemical Water Splitting ◽  
Highly Efficient ◽  
Pec Water Splitting

Promising PEC water splitting activity with a photocurrent density of 3.16 mA cm−2 at 1.23 V vs. RHE was demonstrated in sandwich structured WO3 with exposed highly reactive (002) facet and superior crystallinity of 2-D nanoplatelets.

scholarly journals Effects of flux synthesis on SrNbO2N particles for photoelectrochemical water splitting

2016 ◽  
Vol 4 (20) ◽  
pp. 7658-7664 ◽  
Author(s):  
Masanori Kodera ◽  
Haruki Urabe ◽  
Masao Katayama ◽  
Takashi Hisatomi ◽  
Tsutomu Minegishi ◽  
...  
Keyword(s):  
Water Splitting ◽  
Photocurrent Density ◽  
Photoelectrochemical Water Splitting ◽  
Flux Synthesis ◽  
P Flux

Flux synthesized SrNbO2N photoanode exhibited a photocurrent density of 1.5 mA cm−2 at 1.23 VRHE under AM 1.5G irradiation.

Single-Crystal Integrated Photoanodes Based on 4H-SiC Nanohole Arrays for Boosting Photoelectrochemical Water Splitting Activity

2020 ◽  
Vol 12 (18) ◽  
pp. 20469-20478
Author(s):  
Shang Xu ◽  
Fulin Jiang ◽  
Fengmei Gao ◽  
Lin Wang ◽  
Jie Teng ◽  
...  
Keyword(s):  
Single Crystal ◽  
Water Splitting ◽  
Photoelectrochemical Water Splitting ◽  
Nanohole Arrays

scholarly journals Transferred monolayer MoS2 onto GaN for heterostructure photoanode: Toward stable and efficient photoelectrochemical water splitting

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Mostafa Afifi Hassan ◽  
Min-Woo Kim ◽  
Muhammad Ali Johar ◽  
Aadil Waseem ◽  
Min-Ki Kwon ◽  
...  
Keyword(s):  
Water Splitting ◽  
Alternative Energy ◽  
Chemical Vapor ◽  
Photocurrent Density ◽  
Charge Transfer Resistance ◽  
Photoelectrochemical Water Splitting ◽  
Organic Chemical ◽  
Transfer Resistance ◽  
Alternative Energy Sources ◽  
New Perspective

AbstractSolar-driven photoelectrochemical water splitting (PEC-WS) using semiconductor photoelectrodes is considered a promising solution for sustainable, renewable, clean, safe and alternative energy sources such as hydrogen. Here, we report the synthesis and characterization of a novel heterostructure MoS2/GaN to be used as a photoanode for PEC-WS. The heterostructure was synthesized by metal-organic chemical vapor deposition of single crystalline GaN onto a c-plane sapphire substrate, followed by the deposition of a visible light responding MoS2 monolayer (Eg = 1.9 eV) formed by a Mo-sulfurization technique. Our experimental results reveal that MoS2/GaN photoanode achieved efficient light harvesting with photocurrent density of 5.2 mA cm−2 at 0 V vs Ag/AgCl, which is 2.6 times higher than pristine GaN. Interestingly, MoS2/GaN exhibited a significantly enhanced applied-bias-photon-to-current conversion efficiency of 0.91%, whereas reference GaN yielded an efficiency of 0.32%. The superior PEC performance of the MoS2/GaN photoelectrode is mainly related to the enhanced light absorption due to excellent photocatalytic behavior of MoS2, which reduces charge transfer resistance between the semiconductor and electrolyte interface, and the improvement of charge separation and transport. This result gives a new perspective on the importance of MoS2 as a cocatalyst coated onto GaN to synthesize photoelectrodes for efficient solar energy conversion devices.

Assembling of Bi atoms on TiO2 nanorods boosts photoelectrochemical water splitting of semiconductors

Nanoscale ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 4302-4308 ◽  
Author(s):  
Yajun Pang ◽  
Wenjie Zang ◽  
Zongkui Kou ◽  
Lei Zhang ◽  
Guangqing Xu ◽  
...  
Keyword(s):  
Water Splitting ◽  
Photocurrent Density ◽  
Tio2 Nanorods ◽  
Photoelectrochemical Water Splitting ◽  
Co Catalyst ◽  
Pec Water Splitting

Atom-dispersed Bi metal along the TiO2 nanorods is properly designed as an efficiency co-catalyst to boost the photoelectrochemical (PEC) water splitting with a three-fold enhancement on photocurrent density.

scholarly journals Efficient Photoelectrochemical Water Splitting by Tailoring MoS2/CoTe Heterojunction in a Photoelectrochemical Cell

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2341
Author(s):  
Effat Sitara ◽  
Habib Nasir ◽  
Asad Mumtaz ◽  
Muhammad Fahad Ehsan ◽  
Manzar Sohail ◽  
...  
Keyword(s):  
Water Splitting ◽  
Electrochemical Impedance ◽  
Linear Sweep Voltammetry ◽  
Photocurrent Density ◽  
Photoelectrochemical Water Splitting ◽  
Photoelectrochemical Cell ◽  
Electron Hole ◽  
Pair Separation ◽  
Electron Hole Pair ◽  
Electrochemical Impedance Spectroscopic

Solar energy conversion through photoelectrochemical water splitting (PEC) is an upcoming promising technique. MoS2/CoTe heterostructures were successfully prepared and utilized for PEC studies. MoS2 and CoTe were prepared by a hydrothermal method which were then ultrasonicated with wt. % ratios of 1:3, 1:1 and 3:1 to prepare MoS2/CoTe (1:3), MoS2/CoTe (1:1) and MoS2/CoTe (3:1) heterostructure, respectively. The pure materials and heterostructures were characterized by XRD, UV–vis-DRS, SEM, XPS, PL and Raman spectroscopy. Photoelectrochemical measurements were carried out by linear sweep voltammetry and electrochemical impedance spectroscopic measurements. A maximum photocurrent density of 2.791 mA/cm2 was observed for the MoS2/CoTe (1:1) heterojunction which is about 11 times higher than the pristine MoS2. This current density was obtained at an applied bias of 0.62 V vs. Ag/AgCl (1.23 V vs. RHE) under the light intensity of 100 mW/cm2 of AM 1.5G illumination. The enhanced photocurrent density may be attributed to the efficient electron–hole pair separation. The solar to hydrogen conversion efficiency was found to be 0.84% for 1:1 MoS2/CoTe, signifying the efficient formation of the p-n junction. This study offers a novel heterojunction photocatalyst, for PEC water splitting.

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