A hybrid artificial photosynthesis system with molecular catalysts covalently linked onto TiO2 as electron relay for efficient photocatalytic hydrogen evolution

2020 ◽  
Vol 50 ◽  
pp. 147-152 ◽  
Author(s):  
Jie Zhang ◽  
Gehong Zhang ◽  
Jing Zhang
Keyword(s):  
Hydrogen Evolution ◽  
Artificial Photosynthesis ◽  
Photocatalytic Hydrogen Evolution ◽  
Covalently Linked ◽  
Molecular Catalysts

scholarly journals Photoelectrochemical Hydrogen Evolution Using Dye-Sensitised NiO

2021 ◽  
Author(s):  
Abigail A. Seddon ◽  
Joshua K. G. Karlsson ◽  
Elizabeth A. Gibson ◽  
Laura O'Reilly ◽  
Martin Kaufmann ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Photocurrent Density ◽  
Basic Design ◽  
Ambient Light ◽  
Half Cell ◽  
Overall Performance ◽  
Covalently Linked ◽  
Molecular Catalysts ◽  
Oxygen Evolving ◽  
Further Development

Photoelectrocatalysis offers a way to generate hydrogen and oxygen from water under ambient light. Here, a series of hydrogen evolving photocatalysts based on a ruthenium(II) bipyridyl sensitiser covalently linked to Pt or Pd catalytic centres were adsorbed onto mesoporous NiO and tested for hydrogen evolution in a photoelectrochemical half-cell. The electrolyte buffer was varied and certain catalysts performed better at pH 7 than pH 3 (e.g. PC3 with photocurrent density = 8 µA cm-2), which is encouraging for coupling with an oxygen evolving photoanode in tandem water splitting devices. The molecular catalysts were surprisingly robust when integrated into devices, but the overall performance appears to be limited by rapid recombination at the photocatalyst|NiO interface. Our findings provide further insight towards basic design principles for hydrogen evolving photoelectrochemical (PEC) systems and guidelines for further development.

The effect of central metal in phthalocyanine for photocatalytic hydrogen evolution via artificial photosynthesis

2020 ◽  
Vol 162 ◽  
pp. 1340-1346 ◽  
Author(s):  
Eminegül Genc ◽  
A. Celil Yüzer ◽  
Gizem Yanalak ◽  
Ersan Harputlu ◽  
Emre Aslan ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Artificial Photosynthesis ◽  
Central Metal ◽  
Photocatalytic Hydrogen Evolution

Fabrication of covalently linked graphene-mediated [FeFe]-hydrogenases biomimetic photocatalytic hydrogen evolution system in aqueous solution

2018 ◽  
Vol 224 ◽  
pp. 772-782 ◽  
Author(s):  
Rui-Xia Li ◽  
Xiang-Ting Ren ◽  
Ming-Yi Tang ◽  
Ming-Xi Chen ◽  
Guan-Bo Huang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Evolution ◽  
Evolution System ◽  
Photocatalytic Hydrogen Evolution ◽  
Covalently Linked

Semiconductor Photocatalysts for Solar-to-Hydrogen Energy Conversion: Recent Advances of CdS

2020 ◽  
Vol 16 ◽  
Author(s):  
Yuxue Wei ◽  
Honglin Qin ◽  
Jinxin Deng ◽  
Xiaomeng Cheng ◽  
Mengdie Cai ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Visible Light Irradiation ◽  
Noble Metals ◽  
Light Irradiation ◽  
Photocatalytic Hydrogen Evolution ◽  
Theoretical Design ◽  
Recent Developments

Introduction: Solar-driven photocatalytic hydrogen production from water splitting is one of the most promising solutions to satisfy the increasing demands of a rapidly developing society. CdS has emerged as a representative semiconductor photocatalyst due to its suitable band gap and band position. However, the poor stability and rapid charge recombination of CdS restrict its application for hydrogen production. The strategy of using a cocatalyst is typically recognized as an effective approach for improving the activity, stability, and selectivity of photocatalysts. In this review, recent developments in CdS cocatalysts for hydrogen production from water splitting under visible-light irradiation are summarized. In particular, the factors affecting the photocatalytic performance and new cocatalyst design, as well as the general classification of cocatalysts, are discussed, which includes a single cocatalyst containing noble-metal cocatalysts, non-noble metals, metal-complex cocatalysts, metal-free cocatalysts, and multi-cocatalysts. Finally, future opportunities and challenges with respect to the optimization and theoretical design of cocatalysts toward the CdS photocatalytic hydrogen evolution are described. Background: Photocatalytic hydrogen evolution from water splitting using photocatalyst semiconductors is one of the most promising solutions to satisfy the increasing demands of a rapidly developing society. CdS has emerged as a representative semiconductor photocatalyst due to its suitable band gap and band position. However, the poor stability and rapid charge recombination of CdS restrict its application for hydrogen production. The strategy of using a cocatalyst is typically recognized as an effective approach for improving the activity, stability, and selectivity of photocatalysts. Methods: This review summarizes the recent developments in CdS cocatalysts for hydrogen production from water splitting under visible-light irradiation. Results: Recent developments in CdS cocatalysts for hydrogen production from water splitting under visible-light irradiation are summarized. The factors affecting the photocatalytic performance and new cocatalyst design, as well as the general classification of cocatalysts, are discussed, which includes a single cocatalyst containing noble-metal cocatalysts, non-noble metals, metal-complex cocatalysts, metal-free cocatalysts, and multi-cocatalysts. Finally, future opportunities and challenges with respect to the optimization and theoretical design of cocatalysts toward the CdS photocatalytic hydrogen evolution are described. Conclusion: The state-of-the-art CdS for producing hydrogen from photocatalytic water splitting under visible light is discussed. The future opportunities and challenges with respect to the optimization and theoretical design of cocatalysts toward the CdS photocatalytic hydrogen evolution are also described.

Tuning of the Oxygen Species Linker on the Surface of Polymeric Carbon Nitride to Promote the Photocatalytic Hydrogen Evolution Performance

ChemSusChem ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3605-3613 ◽  
Author(s):  
Qin Lei ◽  
Rongzhi Chen ◽  
Yurong Zhao ◽  
Huanyu Chen ◽  
Xinxin Long ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Carbon Nitride ◽  
Oxygen Species ◽  
Photocatalytic Hydrogen Evolution ◽  
Polymeric Carbon

Edge-Rich Bicrystalline 1T/2H-MoS2 Cocatalyst-Decorated {110} Terminated CeO2 Nanorods for Photocatalytic Hydrogen Evolution

2021 ◽  
Author(s):  
Chengzhang Zhu ◽  
Qiming Xian ◽  
Qiuying He ◽  
Chuanxiang Chen ◽  
Weixin Zou ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Photocatalytic Hydrogen Evolution

Copolymerization of urea and murexide for efficient photocatalytic hydrogen evolution and tetracycline degradation

2021 ◽  
Author(s):  
Zhilu Du ◽  
Xinyu Zhao ◽  
Yingnan Zhao ◽  
Huiying Sun ◽  
Yingqi Li ◽  
...  
Keyword(s):  
Small Molecules ◽  
Hydrogen Evolution ◽  
Effective Strategy ◽  
Structure Property ◽  
Photocatalytic Hydrogen Evolution ◽  
Property Relationship ◽  
Structure Property Relationship ◽  
Tetracycline Degradation ◽  
Depth Study

Copolymerization of urea and small molecules is an effective strategy to modify g-C3N4. To in-depth study the important effects of the introduction of small molecular moiety on the structure-property relationship...

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