scholarly journals Photocatalytic proton reduction with ruthenium and cobalt complexes immobilized on fumed reversed-phase silica

2016 ◽  
Vol 7 (1) ◽  
pp. 436-445 ◽  
Author(s):  
C. Bachmann ◽  
B. Probst ◽  
M. Oberholzer ◽  
T. Fox ◽  
R. Alberto
Keyword(s):  
Water Splitting ◽  
Covalent Binding ◽  
Cobalt Complexes ◽  
Reversed Phase ◽  
Silica Particles ◽  
Molecular Water ◽  
Proton Reduction ◽  
Water Reduction ◽  
Hydrophobic Silica ◽  
Reduction Catalysts

Non-covalent binding of water reduction catalysts and photosensitizers to hydrophobic silica particles represents a general approach for heterogenizing molecular water splitting components.

Polypyridyl Co Complex-based Water Reduction Catalysts: Why Replace a Pyridine Group with Isoquinoline rather than Quinoline?

2021 ◽  
Author(s):  
Xusheng Guo ◽  
Chao Li ◽  
Weibo Wang ◽  
Yuanjun Hou ◽  
Baowen Zhang ◽  
...  
Keyword(s):  
Steric Effect ◽  
Electronic Effect ◽  
Molecular Water ◽  
Water Reduction ◽  
Pyridine Group ◽  
Reduction Catalysts

The substituent‘s electronic effect has been fully leveraged in improving the activity of molecular water reduction catalysts (WRCs). However, the steric effect of the substituents received less attention. In this...

Superhydrophobic PLA fabrics prepared by UV photo-grafting of hydrophobic silica particles possessing vinyl groups

2010 ◽  
Vol 344 (2) ◽  
pp. 584-587 ◽  
Author(s):  
Geun Yeol Bae ◽  
Jinho Jang ◽  
Young Gyu Jeong ◽  
Won Seok Lyoo ◽  
Byung Gil Min
Keyword(s):  
Silica Particles ◽  
Hydrophobic Silica

scholarly journals Chalcogenide-capped triiron clusters [Fe3(CO)9(μ3-E)2], [Fe3(CO)7(μ3-CO)(μ3-E)(μ-dppm)] and [Fe3(CO)7(μ3-E)2(μ-dppm)] (E = S, Se) as proton-reduction catalysts

2019 ◽  
Vol 880 ◽  
pp. 213-222 ◽  
Author(s):  
Ahibur Rahaman ◽  
Shishir Ghosh ◽  
Sucharita Basak-Modi ◽  
Ahmed F. Abdel-Magied ◽  
Shariff E. Kabir ◽  
...  
Keyword(s):  
Proton Reduction ◽  
Reduction Catalysts

Molecular Catalysts Immobilized on Semiconductor Photosensitizers for Proton Reduction toward Visible‐Light‐Driven Overall Water Splitting

ChemSusChem ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1807-1824 ◽  
Author(s):  
Takeshi Morikawa ◽  
Shunsuke Sato ◽  
Keita Sekizawa ◽  
Takeo Arai ◽  
Tomiko M. Suzuki
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Proton Reduction ◽  
Overall Water Splitting ◽  
Visible Light Driven ◽  
Molecular Catalysts

scholarly journals Stabilization of a molecular water oxidation catalyst on a dye−sensitized photoanode by a pyridyl anchor

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Yong Zhu ◽  
Degao Wang ◽  
Qing Huang ◽  
Jian Du ◽  
Licheng Sun ◽  
...  
Keyword(s):  
Water Splitting ◽  
Phosphonic Acid ◽  
Water Oxidation ◽  
Oxidation Catalyst ◽  
Molecular Water ◽  
Applied Bias ◽  
Surface Loading ◽  
Dye Sensitized ◽  
Monomeric Structure ◽  
Molecular Catalysts

Abstract Understanding and controlling the properties of water-splitting assemblies in dye-sensitized photoelectrosynthesis cells is a key to the exploitation of their properties. We demonstrate here that, following surface loading of a [Ru(bpy)3]2+ (bpy = 2,2′-bipyridine) chromophore on nanoparticle electrodes, addition of the molecular catalysts, Ru(bda)(L)2 (bda  =  2,2′-bipyridine-6,6′-dicarboxylate) with phosphonate or pyridyl sites for water oxidation, gives surfaces with a 5:1 chromophore to catalyst ratio. Addition of the surface-bound phosphonate derivatives with L = 4-pyridyl phosphonic acid or diethyl 3-(pyridin-4-yloxy)decyl-phosphonic acid, leads to well-defined surfaces but, following oxidation to Ru(III), they undergo facile, on-surface dimerization to give surface-bound, oxo-bridged dimers. The dimers have a diminished reactivity toward water oxidation compared to related monomers in solution. By contrast, immobilization of the Ru-bda catalyst on TiO2 with the 4,4′-dipyridyl anchoring ligand can maintain the monomeric structure of catalyst and gives relatively stable photoanodes with photocurrents that reach to 1.7 mA cm−2 with an optimized, applied bias photon-to-current efficiency of 1.5%.

Basic Research of Water Photolysis Using Pyrochlore Oxides

2008 ◽  
Vol 388 ◽  
pp. 297-300 ◽  
Author(s):  
Naohisa Mori ◽  
Yutori Tagoku ◽  
Hidenobu Shiroishi ◽  
Yoshinobu Saito ◽  
Morihiro Saito ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Ruthenium Complex ◽  
Basic Research ◽  
Catalyst System ◽  
Oxidation Catalyst ◽  
Complex Catalyst ◽  
Proton Reduction ◽  
Water Photolysis ◽  
Pyrochlore Type ◽  
Reduction Catalysts

Photocatalytic proton reduction and water oxidation have been studied in a tris(2,2’-bipyridyl)ruthenium complex-catalyst system. Pyrochlore-type oxides have been used as proton reduction catalysts with a sacrificial electron donor (Na2EDTA) at pH 7 and as water oxidation catalysts with a sacrificial electron acceptor (K2S2O8) at pH 3. Rate constants for the proton reduction were estimated on the basis of photochemical processes. Yb2Ru2O7-δ was found to be the most active catalyst for proton reduction and water oxidation catalyst in this system.

Hexagonal SiC with spatially separated active sites on polar and nonpolar facets achieving enhanced hydrogen production from photocatalytic water reduction

2018 ◽  
Vol 20 (7) ◽  
pp. 4787-4792 ◽  
Author(s):  
Da Wang ◽  
Ning Liu ◽  
Zhongnan Guo ◽  
Wenjun Wang ◽  
Liwei Guo ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Production ◽  
Water Splitting ◽  
Active Sites ◽  
Spatial Separation ◽  
Water Reduction

The spatial separation of the photo-generated electrons and holes between the polar Si-{0001} and non-polar {10−10} crystal facets on 6H-SiC highly improves the photocatalytic activity of water splitting by nearly 5 times.

Phosphines in artificial photosynthesis: considering different aspects such as chromophores, water reduction catalysts (WRCs), water oxidation catalysts (WOCs), and dyads

2019 ◽  
Vol 3 (11) ◽  
pp. 2926-2953 ◽  
Author(s):  
J. Pann ◽  
H. Roithmeyer ◽  
W. Viertl ◽  
R. Pehn ◽  
M. Bendig ◽  
...  
Keyword(s):  
Complex Systems ◽  
Water Oxidation ◽  
Artificial Photosynthesis ◽  
Phosphine Ligands ◽  
Coordination Complex ◽  
Oxidation Catalysts ◽  
Water Reduction ◽  
Stereoelectronic Properties ◽  
Reduction Catalysts

Coordination complex systems containing phosphine ligands are used in artificial photosynthesis utilizing their unique stereoelectronic properties. Mono-, di- and tetraphosphines act as optimized ligand systems for complexation.

Sign in / Sign up

Export Citation Format

Share Document