scholarly journals Visible light-driven water oxidation using a covalently-linked molecular catalyst–sensitizer dyad assembled on a TiO2 electrode

2016 ◽  
Vol 7 (2) ◽  
pp. 1430-1439 ◽  
Author(s):  
Masanori Yamamoto ◽  
Lei Wang ◽  
Fusheng Li ◽  
Takashi Fukushima ◽  
Koji Tanaka ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Oxidation ◽  
Ruthenium Complex ◽  
Oxidation Catalyst ◽  
Tio2 Electrode ◽  
Molecular Catalyst ◽  
Highly Efficient ◽  
Visible Light Driven ◽  
Artificial Photosynthetic ◽  
Covalently Linked

The combination of porphyrin as a sensitizer and a ruthenium complex as a water oxidation catalyst (WOC) is promising to exploit highly efficient molecular artificial photosynthetic systems.

Visible light-driven water oxidation catalyzed by a highly efficient dinuclear ruthenium complex

2010 ◽  
Vol 46 (35) ◽  
pp. 6506 ◽  
Author(s):  
Yunhua Xu ◽  
Lele Duan ◽  
Lianpeng Tong ◽  
Björn Åkermark ◽  
Licheng Sun
Keyword(s):  
Visible Light ◽  
Water Oxidation ◽  
Ruthenium Complex ◽  
Highly Efficient ◽  
Visible Light Driven ◽  
Dinuclear Ruthenium

(Invited) Visible Light-Driven Water Oxidation with Porphyrin Sensitizers and Water Oxidation Catalysts

2018 ◽  
Vol MA2018-01 (31) ◽  
pp. 1852-1852
Author(s):  
Hiroshi Imahori
Keyword(s):  
Excited State ◽  
Visible Light ◽  
Water Oxidation ◽  
Light Harvesting ◽  
Visible Region ◽  
Oxidation Catalyst ◽  
Efficient Production ◽  
Oxidation Catalysts ◽  
Visible Light Driven ◽  
Artificial Photosynthetic

Exporing renewable energy sources is an important task in making our society sustainable. In this regard, use of sunlight as an infinite energy source is fascinating. Specifically, realizing artificial photosynthesis, i.e., integration of light-harvesting, multi-step electron and proton transfer, and water oxidation for the efficient production of solar fuels, is a great challenge in chemistry. For the purpose, dye-sensitized photoelectrosynthesis cells (DSPSC) have been investigated, as the heterogeneous water splitting on inorganic semiconductors is promising for the upcoming large scale device operation. In DSPSC a molecular sensitizer adsorbed on a semiconducting electrode harvests visible light and injects an electron from the excited-state of the sensitizer (S*) to a conduction band (CB) of the electrode. Then, the sensitizer radical cation (S• +) extracts an electron from a water oxidation catalyst (WOC) to regenerate the sensitizer and one-electron oxidized WOC. After reiterating the cycle, high oxidation states of the WOC are produced, eventually transforming two water molecules into four protons and one oxygen molecule. As the sensitizer bis(2,2’-bipyridine)(4,4’-diphosphonato-2,2’-bipyridine)ruthenium(II) (RuP) has been frequently employed for the construction of molecule-based artificial photosynthetic systems, owing to its sufficient first oxidation potential for water oxidation and a long lifetime of its excited state for electron injection. However, the light-harvesting ability of RuP is rather low in visible region beyond 500 nm. Considering that yellow to red photons mainly shower down on the earth from sun, use of photons in visible region is essential for efficient chemical conversion by sunlight. In this context, porphyrins are attractive as the sensitizer due to their excellent light-harvesting in visible region and facile tuning of their excited-states and redox properties by their chemical functionalization. Nevertheless, molecule-based artificial photosynthetic systems with porphyrins as the sensitizer have been very limited as the result of their poor performance. One plausible reason is the occurrence of fast charge recombination (CR) between the electron injected into the CB of TiO2 (denoted as TiO2(e−)) and S• +. CR from TiO2(e−) to the oxidized WOC would also take place within a few microsecond. Undesirable CR from TiO2(e−) to water is indicated. Thus, to overcome the disadvantages, it is crucial to optimize the electron transfer (ET) processes at the interfaces. In this talk, I will give an overview of our recent initiatives on visible light-driven water oxidation with novel porphyrin sensitizers and water oxidation catalysts. [1] M. Yamamoto, L. Wang, F. Li, T. Fukushima, K. Tanaka, L. Sun and H. Imahori, Chem. Sci., 7, 1430-1439 (2016). [2] M. Yamamoto, Y. Nishizawa, P. Chábera, F. Li, T. Pascher, V. Sundström, L. Sun, and H. Imahori, Chem. Commun., 52, 13702-13705 (2016). [3] M. Yamamoto, J. Föhlinger, J. Petersson, L. Hammarström, and H. Imahori, Angew. Chem. Int. Ed., 56, 3329-3333 (2017).

A hybrid polyoxometalate–organic molecular catalyst for visible light driven water oxidation

2014 ◽  
Vol 50 (78) ◽  
pp. 11591-11594 ◽  
Author(s):  
C. Zhang ◽  
X. Lin ◽  
Z. Zhang ◽  
L.-S. Long ◽  
C. Wang ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Oxidation ◽  
Keggin Structure ◽  
Inorganic Hybrid ◽  
Molecular Catalyst ◽  
Visible Light Driven

A novel organic–inorganic hybrid monocapped/bicapped Keggin structure [CoII(bpy)3]6(H2bpy)[(CoIIbpy)2(PMo8VIMo4VO40)]3 [(CoIIbpy)(PMo8VIMo4VO40)]·16H2O (bpy = 2,2′-bipyridine) was synthesized and shown to be an efficient visible light-driven catalyst for water oxidation.

scholarly journals Visible light-driven water oxidation with a ruthenium sensitizer and a cobalt-based catalyst connected with a polymeric platform

2019 ◽  
Vol 215 ◽  
pp. 111-122 ◽  
Author(s):  
Zeynep Kap ◽  
Ferdi Karadas
Keyword(s):  
Visible Light ◽  
Prussian Blue ◽  
Water Oxidation ◽  
Oxidation Catalyst ◽  
Visible Light Driven ◽  
Type Water

A novel PS–WOC dyad which incorporates a ruthenium-based photosensitizer (PS) connected to a Prussian blue type water oxidation catalyst (WOC) through a P4VP platform is presented.

Nanoscale cobalt metal–organic framework as a catalyst for visible light-driven and electrocatalytic water oxidation

2016 ◽  
Vol 40 (4) ◽  
pp. 3032-3035 ◽  
Author(s):  
Qian Xu ◽  
Hui Li ◽  
Fan Yue ◽  
Le Chi ◽  
Jide Wang
Keyword(s):  
Visible Light ◽  
Water Oxidation ◽  
Metal Organic Framework ◽  
Oxidation Catalyst ◽  
Cobalt Metal ◽  
Visible Light Driven ◽  
Metal Organic ◽  
Organic Framework

Co-ZIF-67 is proposed as an efficient water oxidation catalyst under visible light.

Visible-light-driven water oxidation at a polychromium-oxo-electrodeposited TiO2 electrode as a new type of earth-abundant photoanode

2014 ◽  
Vol 50 (10) ◽  
pp. 1241-1243 ◽  
Author(s):  
Masashi Kajita ◽  
Kenji Saito ◽  
Naoto Abe ◽  
Akinori Shoji ◽  
Kazuki Matsubara ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Oxidation ◽  
Tio2 Electrode ◽  
Earth Abundant ◽  
Visible Light Driven ◽  
New Type

A polychromium-oxo-deposited TiO2 electrode was fabricated as an earth-abundant photoanode for visible-light-driven water oxidation.

scholarly journals Photoinduced hole transfer from tris(bipyridine)ruthenium dye to a high-valent iron-based water oxidation catalyst

2019 ◽  
Vol 215 ◽  
pp. 162-174 ◽  
Author(s):  
Sergii I. Shylin ◽  
Mariia V. Pavliuk ◽  
Luca D’Amario ◽  
Igor O. Fritsky ◽  
Gustav Berggren
Keyword(s):  
Visible Light ◽  
Water Oxidation ◽  
Oxidation Catalyst ◽  
Scavenging Activity ◽  
Hole Transfer ◽  
Cage Complex ◽  
Visible Light Driven ◽  
Iron Based ◽  
High Valent ◽  
Ruthenium Dye

Fast visible light-driven water oxidation catalyzed by the FeIV cage complex relies on its efficient hole scavenging activity in the system utilizing [Ru(bpy)3]2+ as a photosensitizer.

A trinuclear ruthenium complex as a highly efficient molecular catalyst for water oxidation

2016 ◽  
Vol 45 (9) ◽  
pp. 3814-3819 ◽  
Author(s):  
L. L. Zhang ◽  
Y. Gao ◽  
Z. Liu ◽  
X. Ding ◽  
Z. Yu ◽  
...  
Keyword(s):  
Dicarboxylic Acid ◽  
Water Oxidation ◽  
Ruthenium Complex ◽  
Molecular Catalyst ◽  
Highly Efficient ◽  
Acid Type

A trinuclear catalyst, 3, was synthesized based on Ru(bda) (bda = 2,2′-bipyridine-6,6′-dicarboxylic acid)-type catalysts to achieve higher catalytic abilities in homogeneous water oxidation systems.

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