An on-demand solar hydrogen-evolution system for unassisted high-efficiency pure-water splitting

2019 ◽  
Vol 7 (29) ◽  
pp. 17315-17323 ◽  
Author(s):  
Wei Che ◽  
Hui Su ◽  
Xu Zhao ◽  
Yuanli Li ◽  
Hui Zhang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Charge Separation ◽  
High Efficiency ◽  
Pure Water ◽  
Evolution System ◽  
Solar Hydrogen ◽  
On Demand ◽  
Surface Hydroxylation

A surface hydroxylation structure of g-C3N3.5(O0.5H0.5) photocatalyst was designed to concurrently increase the toxicity resistance and maximize the charge separation for H2 evolution.

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.

Fe-Co-P multi-heterostructure arrays for efficient electrocatalytic water splitting

2021 ◽  
Author(s):  
Hanwen Xu ◽  
Jiawei Zhu ◽  
Pengyan Wang ◽  
Ding Chen ◽  
Chengtian Zhang ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Oxygen Evolution Reaction ◽  
Rational Design ◽  
Large Scale ◽  
High Efficiency ◽  
Bifunctional Catalysts

Rational design and construction of high-efficiency bifunctional catalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is crucial for large-scale hydrogen production by water splitting. Herein, by a...

scholarly journals Mechanism for spontaneous oxygen and hydrogen evolution reactions on CoO nanoparticles

2019 ◽  
Vol 7 (12) ◽  
pp. 6708-6719 ◽  
Author(s):  
Kyoung-Won Park ◽  
Alexie M. Kolpak
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
High Efficiency ◽  
Applied Bias ◽  
Co Catalyst ◽  
Photocatalytic Water Splitting ◽  
Overall Water Splitting ◽  
Nanoparticle Suspensions ◽  
Hydrogen Evolution Reactions ◽  
Coo Nanoparticles

Overall photocatalytic water splitting with a high efficiency has recently been observed for CoO nanoparticle suspensions in the absence of an applied bias or co-catalyst. This study clarifies the mechanism of spontaneous overall water splitting with the prominent efficiency observed on the CoO nanoparticle.

A facile in situ approach to fabricate N,S-TiO2/g-C3N4 nanocomposite with excellent activity for visible light induced water splitting for hydrogen evolution

2015 ◽  
Vol 17 (12) ◽  
pp. 8070-8077 ◽  
Author(s):  
Soumyashree Pany ◽  
K. M. Parida
Keyword(s):  
Visible Light ◽  
Specific Surface ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Charge Separation ◽  
Small Crystallite Size ◽  
Excellent Activity ◽  
Efficient Charge ◽  
Small Crystallite

The efficient charge separation, small crystallite size and enhanced specific surface area in N,S-TiO2/g-C3N4 nanocomposites make the system pivotal and unique for hydrogen evolution.

Ultrasmall diiron phosphide nanodots anchored on graphene sheets with enhanced electrocatalytic activity for hydrogen production via high-efficiency water splitting

2016 ◽  
Vol 4 (41) ◽  
pp. 16028-16035 ◽  
Author(s):  
Huawei Huang ◽  
Chang Yu ◽  
Juan Yang ◽  
Xiaotong Han ◽  
Changtai Zhao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Active Site ◽  
Electrocatalytic Activity ◽  
High Efficiency ◽  
Graphene Sheets

Active site-enriched Fe2P nanodots anchored on graphene sheets (Fe2P-ND/FG) exhibit enhanced catalytic activity and stability for the hydrogen evolution reaction.

Extending the π-electron conjugation in 2D planar graphitic carbon nitride: efficient charge separation for overall water splitting

2019 ◽  
Vol 7 (8) ◽  
pp. 3757-3771 ◽  
Author(s):  
Sankeerthana Bellamkonda ◽  
Ramasamy Shanmugam ◽  
Ranga Rao Gangavarapu
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Charge Separation ◽  
Carbon Nitride ◽  
Pure Water ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Aromatic Rings ◽  
Overall Water Splitting ◽  
Efficient Charge

We report direct overall pure water splitting by visible light excited graphitic carbon nitride incorporated with conjugated aromatic rings without using sacrificial agents.

Hybridization of brookite TiO2 with g-C3N4: a visible-light-driven photocatalyst for As3+ oxidation, MO degradation and water splitting for hydrogen evolution

2014 ◽  
Vol 2 (38) ◽  
pp. 15774-15780 ◽  
Author(s):  
Yipeng Zang ◽  
Liping Li ◽  
Yangsen Xu ◽  
Ying Zuo ◽  
Guangshe Li
Keyword(s):  
Visible Light ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
High Efficiency ◽  
Visible Light Driven

A visible-light-driven photocatalyst of brookite TiO2 coupled with g-C3N4 exhibited high efficiency for As3+ oxidation, MO degradation, and hydrogen evolution.

Co-Doped FeS2 with a porous structure for efficient electrocatalytic overall water splitting

2020 ◽  
Vol 44 (5) ◽  
pp. 1711-1718 ◽  
Author(s):  
Lingfeng Gao ◽  
Chengying Guo ◽  
Xuejing Liu ◽  
Xiaojing Ma ◽  
Mingzhu Zhao ◽  
...  
Keyword(s):  
Porous Structure ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Oxygen Evolution Reaction ◽  
High Efficiency ◽  
Overall Water Splitting ◽  
Earth Abundant ◽  
Low Activity ◽  
Co Doped

The development of earth-abundant and high-efficiency electrocatalysts for overall water splitting is highly fascinating and still presents a challenge caused by the low activity for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) at the same time.

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