scholarly journals Reactivity and Mechanism of Photo- and Electrocatalytic Hydrogen Evolution by a Diimine Copper(I) Complex

Catalysts ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1302
Author(s):  
Maria Drosou ◽  
Fotios Kamatsos ◽  
George Ioannidis ◽  
Athanasios Zarkadoulas ◽  
Christiana A. Mitsopoulou ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Dft Calculations ◽  
Hydrogen Evolution ◽  
Molecular Mechanisms ◽  
High Photocatalytic Activity ◽  
Proton Exchange ◽  
H2 Evolution ◽  
Turnover Number ◽  
Proton Reduction ◽  
Insight Into

The tetrahedral copper(I) diimine complex [Cu(pq)2]BF4 displays high photocatalytic activity for the H2 evolution reaction with a turnover number of 3564, thus representing the first type of a Cu(I) quinoxaline complex capable of catalyzing proton reduction. Electrochemical experiments indicate that molecular mechanisms prevail and DFT calculations provide in-depth insight into the catalytic pathway, suggesting that the coordinating nitrogens play crucial roles in proton exchange and hydrogen formation.

scholarly journals Dye-sensitized Pt@TiO2 core–shell nanostructures for the efficient photocatalytic generation of hydrogen

2014 ◽  
Vol 5 ◽  
pp. 360-364 ◽  
Author(s):  
Jun Fang ◽  
Lisha Yin ◽  
Shaowen Cao ◽  
Yusen Liao ◽  
Can Xue
Keyword(s):  
Photocatalytic Activity ◽  
High Photocatalytic Activity ◽  
Shell Structures ◽  
Core Shell ◽  
Synergic Effect ◽  
Proton Reduction ◽  
Dye Sensitization ◽  
Dye Sensitized ◽  
Shell Nanostructures ◽  
Photogenerated Electrons

Pt@TiO2 core–shell nanostructures were prepared through a hydrothermal method. The dye-sensitization of these Pt@TiO2 core–shell structures allows for a high photocatalytic activity for the generation of hydrogen from proton reduction under visible-light irradiation. When the dyes and TiO2 were co-excited through the combination of two irradiation beams with different wavelengths, a synergic effect was observed, which led to a greatly enhanced H2 generation yield. This is attributed to the rational spatial distribution of the three components (dye, TiO2, Pt), and the vectored transport of photogenerated electrons from the dye to the Pt particles via the TiO2 particle bridge.

Photocatalytic Activity of Bismuth Layered Perovskite Treated with Acid

2009 ◽  
Vol 421-422 ◽  
pp. 554-557
Author(s):  
Soihiro Watanabe ◽  
Yousuke Narumi ◽  
Kenji Toda ◽  
Tadashi Ishigaki ◽  
Kazuyoshi Uematsu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Acid Treatment ◽  
Uv Light ◽  
High Photocatalytic Activity ◽  
Light Irradiation ◽  
Layered Perovskite ◽  
O2 Evolution ◽  
Water Decomposition ◽  
H2 Evolution ◽  
Uv Light Irradiation

We synthesized Sr0.7La0.2[ ]0.1Bi2Ta2O9 (SBTL , [ ] vacancy), and measured their photocatalytic activity for water decomposition under UV light irradiation after acid treatment. They showed the high photocatalytic activity under UV light irradiation (H2 evolution (213μmol / h) , O2 evolution (82μmol / h)).

Unsaturated iron ion based coordination polymer for highly efficient photocatalytic hydrogen evolution with simultaneous real wastewater degradation: Mechanistic insight into multifunctional Fe-N sites

2021 ◽  
Author(s):  
Qiuchen Wang ◽  
Jun Ma ◽  
Gen Li ◽  
Tianxiang Zhao ◽  
Peng Chen ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Hydrogen Evolution ◽  
Environmental Applications ◽  
H2 Evolution ◽  
Iron Ion ◽  
Photocatalytic Hydrogen Evolution ◽  
Mechanistic Insight ◽  
Real Wastewater ◽  
Photocatalytic Reactions ◽  
Insight Into

Simultaneous photocatalytic reactions of H2 evolution and real wastewater degradation have drawn much attention to practical energy and environmental applications. While these applications of photocatalyst often suffer from the high...

Synthesis and photocatalytic H2 evolution properties of four titanium-oxo-clusters based on a cyclohex-3-ene-1-carboxylate ligand

2017 ◽  
Vol 46 (32) ◽  
pp. 10630-10634 ◽  
Author(s):  
Mei-Yan Gao ◽  
Shumei Chen ◽  
Lan-Xia Hu ◽  
Lei Zhang ◽  
Jian Zhang
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Carboxylate Ligand ◽  
H2 Evolution ◽  
Photocatalytic H2 Evolution

This work reveals an interesting Ti–Cec system with various structures, where PTC-91 and PTC-94 have good photocatalytic activity and stability in water-splitting hydrogen evolution.

Studies on the Stability of Pt/K2La2Ti3O10 Photocatalytic Hydrogen Evolution

2011 ◽  
Vol 233-235 ◽  
pp. 1646-1649 ◽  
Author(s):  
Wen Quan Cui ◽  
Yue Li Qi ◽  
Jun Cheng ◽  
Jin Shan Hu ◽  
Ying Hua Liang
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Valence State ◽  
High Photocatalytic Activity ◽  
Methanol Solution ◽  
Reaction Cell ◽  
Photocatalytic Hydrogen Evolution ◽  
Vis Spectroscopy ◽  
Photocatalytic Activities ◽  
The Stability

Pt/K2La2Ti3O10 was prepared by impregnating K2La2Ti3O10 into H2PtCl6 solution. The structure of the photocatalyst was studied by means of XRD, UV-Vis spectroscopy and XPS. And the photocatalytic activities of the samples were examined in a Pyrex reaction cell by splitting methanol solution. The result revealed that Pt/K2La2Ti3O10 photocatalyst showed much higher activity than pure K2La2Ti3O10 and kept a high photocatalytic activity even after 120 hours of illumination. XPS showed that the valence state of Pt was reduced from Ptto Pt0 during the illumination.

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