Demonstration of enhanced carrier transport, charge separation, and long-term stability for photocatalytic water splitting by a rapid hot pressing process

2017 ◽  
Vol 5 (21) ◽  
pp. 10687-10695 ◽  
Author(s):  
Wei-Hsuan Hung ◽  
Kun-Lin Yang ◽  
Sz-Nian Lai ◽  
Chin-Ru Yang ◽  
Jing-Jong Shyue ◽  
...  
Keyword(s):  
Water Splitting ◽  
Applied Voltage ◽  
Charge Separation ◽  
Hot Pressing ◽  
Carrier Transport ◽  
Untreated Sample ◽  
Photocatalytic Water Splitting ◽  
Term Stability ◽  
Long Term Stability

The hot pressed sample demonstrated more than 6-fold enhancement compared to the untreated sample at an applied voltage of 1.2 V.

scholarly journals Wittichenite semiconductor of Cu3BiS3 films for efficient hydrogen evolution from solar driven photoelectrochemical water splitting

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Dingwang Huang ◽  
Lintao Li ◽  
Kang Wang ◽  
Yan Li ◽  
Kuang Feng ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Low Cost ◽  
Solar Hydrogen ◽  
Onset Potential ◽  
Term Stability ◽  
Long Term Stability ◽  
Solar Water Splitting ◽  
Current Densities

AbstractA highly efficient, low-cost and environmentally friendly photocathode with long-term stability is the goal of practical solar hydrogen evolution applications. Here, we found that the Cu3BiS3 film-based photocathode meets the abovementioned requirements. The Cu3BiS3-based photocathode presents a remarkable onset potential over 0.9 VRHE with excellent photoelectrochemical current densities (~7 mA/cm2 under 0 VRHE) and appreciable 10-hour long-term stability in neutral water solutions. This high onset potential of the Cu3BiS3-based photocathode directly results in a good unbiased operating photocurrent of ~1.6 mA/cm2 assisted by the BiVO4 photoanode. A tandem device of Cu3BiS3-BiVO4 with an unbiased solar-to-hydrogen conversion efficiency of 2.04% is presented. This tandem device also presents high stability over 20 hours. Ultimately, a 5 × 5 cm2 large Cu3BiS3-BiVO4 tandem device module is fabricated for standalone overall solar water splitting with a long-term stability of 60 hours.

Graphene oxide in carbon nitride: from easily processed precursors to a composite material with enhanced photoelectrochemical activity and long-term stability

2019 ◽  
Vol 7 (19) ◽  
pp. 11718-11723 ◽  
Author(s):  
Guiming Peng ◽  
Jiani Qin ◽  
Michael Volokh ◽  
Chong Liu ◽  
Menny Shalom
Keyword(s):  
Composite Material ◽  
Graphene Oxide ◽  
Charge Separation ◽  
Carbon Nitride ◽  
Photoelectrochemical Activity ◽  
Term Stability ◽  
Long Term Stability ◽  
Transfer Properties

Herein we report a facile method to grow an ordered carbon nitride (CN) layer with improved charge separation and transfer properties under illumination.

scholarly journals Amorphous outperforms crystalline nanomaterials: surface modifications of molecularly derived CoP electro(pre)catalysts for efficient water-splitting

2019 ◽  
Vol 7 (26) ◽  
pp. 15749-15756 ◽  
Author(s):  
Rodrigo Beltrán-Suito ◽  
Prashanth W. Menezes ◽  
Matthias Driess
Keyword(s):  
Water Splitting ◽  
Crystalline Phase ◽  
Surface Modifications ◽  
Term Stability ◽  
Long Term Stability ◽  
Overall Water Splitting ◽  
Low Overpotential

Amorphous CoP outperforms the crystalline phase in the OER, HER and overall water splitting with low overpotential and remarkable long-term stability.

Atomic-Scale Origin of Long-Term Stability and High Performance ofp-GaN Nanowire Arrays for Photocatalytic Overall Pure Water Splitting

2016 ◽  
Vol 28 (38) ◽  
pp. 8388-8397 ◽  
Author(s):  
Md Golam Kibria ◽  
Ruimin Qiao ◽  
Wanli Yang ◽  
Idris Boukahil ◽  
Xianghua Kong ◽  
...  
Keyword(s):  
Water Splitting ◽  
High Performance ◽  
Pure Water ◽  
Nanowire Arrays ◽  
Atomic Scale ◽  
Term Stability ◽  
Long Term Stability ◽  
Gan Nanowire

Ultrathin Ir nanowires as high-performance electrocatalysts for efficient water splitting in acidic media

Nanoscale ◽  
2018 ◽  
Vol 10 (4) ◽  
pp. 1892-1897 ◽  
Author(s):  
Luhong Fu ◽  
Fulin Yang ◽  
Gongzhen Cheng ◽  
Wei Luo
Keyword(s):  
Water Splitting ◽  
High Performance ◽  
Acidic Media ◽  
Term Stability ◽  
Long Term Stability ◽  
Overall Water Splitting ◽  
Chemical Approach ◽  
Wet Chemical ◽  
Attachment Mechanism

Ultrathin Ir wavy nanowires with a diameter of 1.7 nm are prepared by a simple wet-chemical approach through a nanoparticle attachment mechanism, and further used as electrocatalysts due to their superior activity and long-term stability toward overall water splitting in acidic media.

Enhanced oxygen and hydrogen evolution performance by carbon-coated CoS2–FeS2 nanosheets

2020 ◽  
Vol 49 (38) ◽  
pp. 13352-13358 ◽  
Author(s):  
Wenpin Wang ◽  
Yue Xu ◽  
Jiali Yao ◽  
Xien Liu ◽  
Zhengmao Yin ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Carbon Layer ◽  
Term Stability ◽  
Long Term Stability ◽  
Overall Water Splitting ◽  
Carbon Coated

A facile one-spot strategy to prepare carbon-layer-coated CoS2–FeS2 heterojunction nanosheets was developed; it exhibited excellent overall water splitting activity with 1.66 V at 10 mA cm−2 and maintained the long-term stability over 26 h.

Ultrasmall Ir nanoparticles for efficient acidic electrochemical water splitting

2018 ◽  
Vol 5 (5) ◽  
pp. 1121-1125 ◽  
Author(s):  
Luhong Fu ◽  
Xiang Zeng ◽  
Chaozhang Huang ◽  
Ping Cai ◽  
Gongzhen Cheng ◽  
...  
Keyword(s):  
Water Splitting ◽  
Synthetic Method ◽  
Acidic Media ◽  
Term Stability ◽  
Long Term Stability ◽  
Overall Water Splitting ◽  
Electrochemical Water Splitting

1.8 nm monodisperse Ir nanoparticles have been prepared through a colloidal synthetic method, and further used as electrocatalysts for superior activity and long-term stability toward overall water splitting in acidic media.

scholarly journals Helical cobalt borophosphates to master durable overall water-splitting

2019 ◽  
Vol 12 (3) ◽  
pp. 988-999 ◽  
Author(s):  
Prashanth W. Menezes ◽  
Arindam Indra ◽  
Ivelina Zaharieva ◽  
Carsten Walter ◽  
Stefan Loos ◽  
...  
Keyword(s):  
Water Splitting ◽  
Electrocatalytic Oxidation ◽  
Energetic Efficiency ◽  
Term Stability ◽  
Long Term Stability ◽  
Overall Water Splitting

A unique class of bifunctional robust materials was discovered which not only facilitates both the electrocatalytic oxidation and reduction of water to oxygen and hydrogen but also combines outstanding performance and energetic efficiency with remarkable long-term stability.

Bismuth iron molybdenum oxide solid solution: a novel and durable electrocatalyst for overall water splitting

2020 ◽  
Vol 56 (53) ◽  
pp. 7293-7296
Author(s):  
Sakila Khatun ◽  
Poulomi Roy
Keyword(s):  
Solid Solution ◽  
Water Splitting ◽  
Alkaline Medium ◽  
Molybdenum Oxide ◽  
Term Stability ◽  
Long Term Stability ◽  
Overall Water Splitting ◽  
Oxide Solid Solution ◽  
First Time

Bismuth iron molybdenum oxide solid solution has been identified as a potential electrocatalyst for the first time. Besides its outstanding electrocatalytic performance, the material withstands highly alkaline medium, showing long-term stability.

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