Direct solar-to-hydrogen generation by quasi-artificial leaf approach: possibly scalable and economical device

2019 ◽  
Vol 7 (7) ◽  
pp. 3179-3189 ◽  
Author(s):  
Kshirodra Kumar Patra ◽  
Pradnya Arunrao Bharad ◽  
Vanshika Jain ◽  
Chinnakonda S. Gopinath
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Generation ◽  
Solar Light ◽  
Co Catalyst

Instant hydrogen evolution occurs on shining solar light on to an artificial leaf device made of TiO2/Mn–CdS with a Pt or NiCu-alloy co-catalyst.

Photocatalytic hydrogen evolution using nanocrystalline gallium oxynitride spinel

2014 ◽  
Vol 2 (45) ◽  
pp. 19247-19252 ◽  
Author(s):  
H. A. Naveen Dharmagunawardhane ◽  
William R. Woerner ◽  
Quiyan Wu ◽  
Huafeng Huang ◽  
Xianyin Chen ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Light Irradiation ◽  
Solar Light ◽  
Catalyst Loading ◽  
Co Catalyst ◽  
Photocatalytic Hydrogen Evolution ◽  
Simulated Solar Light ◽  
Solar Light Irradiation

Photocatalytic hydrogen evolution from water was observed over nanocrystalline gallium oxynitride spinel under simulated solar light irradiation (320 nm <λ< 800 nm). Up to 8 μmol h−1of H2was evolved without co-catalyst loading.

Efficient solar light-driven H2 production: post-synthetic encapsulation of a Cu2O co-catalyst in a metal–organic framework (MOF) for boosting the effective charge carrier separation

2018 ◽  
Vol 8 (13) ◽  
pp. 3286-3294 ◽  
Author(s):  
Peramaiah Karthik ◽  
Ekambaram Balaraman ◽  
Bernaurdshaw Neppolian
Keyword(s):  
Charge Carrier ◽  
Effective Charge ◽  
Hydrogen Generation ◽  
Metal Organic Framework ◽  
H2 Production ◽  
Solar Light ◽  
Catalytic Systems ◽  
Co Catalyst ◽  
Metal Organic ◽  
Carrier Separation

The development of new and efficient catalytic systems for solar light-driven hydrogen generation is one of the prime focuses of contemporary chemical sciences.

Photocatalytic Hydrogen Evolution over Pt/Co-TiO2 Photocatalysts

2020 ◽  
Vol 01 ◽  
Author(s):  
S. Akel ◽  
R. Dillert ◽  
D.W. Bahnemann
Keyword(s):  
Photocatalytic Activity ◽  
Band Gap ◽  
Hydrogen Evolution ◽  
Molecular Hydrogen ◽  
Hydrogen Generation ◽  
Solar Light ◽  
Tio2 Photocatalysts ◽  
Photocatalytic Hydrogen Evolution ◽  
Doped Tio2 ◽  
Simulated Solar Light

Aims: cobalt doped TiO2 composites were synthesized with the aim to decrease the TiO2 band gap which results in enhanced visible absorption and then loaded with 1 wt.% of platinum for promoting the formation of molecular hydrogen. Background: Controversial results of the cobalt-based compounds create doubts about the photocatalytic activity of the cobalt doped TiO2 materials. Thus, cobalt doped TiO2 composites were synthesized, and the photocatalytic activity was checked for the hydrogen generation. Objective: The objective of this study is the synthesis of photocatalysts that are highly active for the photocatalytic hydrogen evolution. Methods: The TiO2 and Co-TiO2 photocatalysts were synthesized using two different methods that are reflux and hydrothermal synthesis. Additionally, The Pt deposition on the prepared TiO2 and Co-TiO2 catalysts (1 wt.% Pt) was performed by the photoplatinization method. Result: The results showed that the reduction of protons over bare TiO2 and Co-TiO2 materials is possible from the thermodynamic point of view. The evolution of molecular hydrogen from aqueous methanol employing 1 wt.% platinum loaded on 0.5 wt.% Co-TiO2 photocatalysts under simulated solar light irradiation was investigated. The platinized CoTiO2 composites along with the platinized TiO2 samples have shown high photocatalytic hydrogen evolution. Higher hydrogen evolution rates were determined in the presence of all platinized materials, and a maximum of 317 μmol h-1 is observed on a Pt/Co-TiO2 photocatalyst prepared by a hydrothermal method. Conclusion: EPR results confirmed that the defects observed in the sample prepared within the hydrothermal processing were in the surface and have better crystallinity, while the defects detected on the samples prepared by reflux synthesis were less crystalline. The nature of semiconductor materials was explored through the determination of the flatband potential using the Mott–Schottky equation. The Mott−Schottky analysis of electrochemical impedance measurements showed that all semiconductors were n-type semiconductors and that cobalt doping induces impurity level within the band gap of TiO2. The experimental results of photocatalytic hydrogen generation from methanol-reforming showed that the Co- doping does not affect the photocatalytic activity of both Pt/Co-TiO2 catalysts. Despite that, the Pt/Co-TiO2-HT was the best photocatalyst under simulated solar light and show a maximum hydrogen evolution rate of 317 ± 44 μmol h-1. Other: Based on the experimental results, a possible mechanism for the continuous photocatalytic activity of Pt/Co-TiO2 photocatalysts under simulated solar light is proposed.

scholarly journals Enhancement of photocatalytic hydrogen evolution with catalysts based on carbonized MOF-5 and g-C3N4

RSC Advances ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 4032-4039 ◽  
Author(s):  
Malgorzata Aleksandrzak ◽  
Krzysztof Sielicki ◽  
Ewa Mijowska
Keyword(s):  
Hydrogen Evolution ◽  
Carbon Nitride ◽  
Hydrogen Generation ◽  
Metal Organic Framework ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Co Catalyst ◽  
Photocatalytic Hydrogen Evolution ◽  
Photocatalytic Hydrogen Generation ◽  
Metal Organic

The study presents enhancement of photocatalytic hydrogen generation after metal–organic framework (MOF5) carbonization at 700 °C and its utilization as a co-catalyst of graphitic carbon nitride (gCN).

scholarly journals Rugae-like FeP nanocrystal assembly on a carbon cloth: an exceptionally efficient and stable cathode for hydrogen evolution

Nanoscale ◽  
2015 ◽  
Vol 7 (25) ◽  
pp. 10974-10981 ◽  
Author(s):  
Xiulin Yang ◽  
Ang-Yu Lu ◽  
Yihan Zhu ◽  
Shixiong Min ◽  
Mohamed Nejib Hedhili ◽  
...  
Keyword(s):  
Gas Phase ◽  
Surface Area ◽  
Hydrogen Evolution ◽  
Hydrogen Generation ◽  
High Surface ◽  
High Surface Area ◽  
Catalytic Efficiency ◽  
Carbon Cloth ◽  
Nanocrystal Assembly

High surface area FeP nanosheets on a carbon cloth were prepared by gas phase phosphidation of electroplated FeOOH, which exhibit exceptionally high catalytic efficiency and stability for hydrogen generation.

Synthesis of hierarchical MoSe2 nanolayers on sodium sulfide crystals for electrocatalytic hydrogen evolution

CrystEngComm ◽  
2021 ◽  
Author(s):  
Xiaoshuang Chen ◽  
Meina Ju ◽  
Kun Song ◽  
Guoli Chen ◽  
Rui Yang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
High Performance ◽  
Sodium Sulfide ◽  
Hydrogen Generation ◽  
Clean Energy

Hydrogen generation via water electroreduction is a pivotal portion of exploiting clean-energy skills. Nevertheless, developing a low price and high-performance catalytic activity substance to take the place of expensively precious...

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