Visible Light Induced Hole Transport from Sensitizer to Co3O4 Water Oxidation Catalyst across Nanoscale Silica Barrier with Embedded Molecular Wires

2013 ◽  
Vol 25 (11) ◽  
pp. 2264-2273 ◽  
Author(s):  
Anil Agiral ◽  
Han Sen Soo ◽  
Heinz Frei
Keyword(s):  
Visible Light ◽  
Water Oxidation ◽  
Molecular Wires ◽  
Hole Transport ◽  
Oxidation Catalyst

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.

A visible light water-splitting cell with a photoanode formed by codeposition of a high-potential porphyrin and an iridium water-oxidation catalyst

2011 ◽  
Vol 4 (7) ◽  
pp. 2389 ◽  
Author(s):  
Gary F. Moore ◽  
James D. Blakemore ◽  
Rebecca L. Milot ◽  
Jonathan F. Hull ◽  
Hee-eun Song ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Water Oxidation ◽  
High Potential ◽  
Oxidation Catalyst ◽  
Light Water

(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).

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.

(Invited) Driving Metal Oxide Water Oxidation Catalyst By Visible Light Absorber Separated By an Ultrathin Proton Conducting Silica Membrane with Embedded Molecular Wires

2018 ◽  
Vol MA2018-01 (31) ◽  
pp. 1845-1845
Author(s):  
Heinz Frei
Keyword(s):  
Charge Transfer ◽  
Metal Oxide ◽  
Visible Light ◽  
Water Oxidation ◽  
Oxide Catalyst ◽  
Molecular Wires ◽  
Core Shell ◽  
Molecular Wire ◽  
Silica Membrane ◽  
Light Absorber

We are developing nanoscale photosynthetic assemblies for coupling the catalysis for CO2 reduction with the H2O oxidation half reaction, taking an inorganic molecular approach that utilizes heterobinuclear units such as ZrOCoII as light absorber coupled to metal oxide catalyst. Artificial nanoscale photosystems are inspired by natural photosynthesis, the only existing technology for producing energy-dense chemicals on the terawatt scale, which has as key design feature the closing of the cycle of water oxidation and formation of primary reduction intermediates on the shortest possible length scale, the nanometer scale, while separating the incompatible redox environments by an ultrathin membrane. To accomplish the photocatalytic cycle of CO2 reduction by H2O under membrane separation, we are exploring a Co oxide – silica core-shell nanotube geometry.1-3 The inside surface of the Co oxide nanotube core provides the catalytic sites for H2O oxidation, which are separated from light absorber and sites of CO2 reduction on the outside by an ultrathin (2 nm) dense phase silica layer. The latter functions as proton conducting, O2 impermeable membrane.4 Tight, molecular-level control of charge transfer between light absorber and Co oxide nanotube catalyst is accomplished by oligo-para(phenylene vinylene) molecules with 3 aryl units embedded in the silica shell.5 This approach addresses the requirements of robustness and tunability of the electronic properties of the photosystem components with the objective of converting the maximum fraction of the solar photon energy into chemical energy of the fuel.6 The core-shell nanotube geometry offers the opportunity of assembling macroscale arrays of enormous numbers of nanotubes, each operating as independent photosynthetic unit while at the same time providing separation of evolving O2 and reduced CO2 products on all length scales from nano to centimeters.3 Detailed characterization of charge transfer between light absorber and Co oxide catalyst across the silica membrane was investigated by transient optical absorption spectroscopy and photoelectro-chemical methods using nanotube, spherical, or planar morphology depending on the type of experiment. Ultrafast optical monitoring allowed us to detect transient positive charge (hole) on the silica embedded molecular wire and revealed very efficient, 255 ps transfer to the Co oxide catalyst.7 Short circuit current measurements upon visible light sensitized hole injection using sensitizers with different redox potentials showed that charge transfer is controlled by the HOMO and LUMO energetics of the silica embedded wire molecules.4,5 Synthetic methods were developed for the accurate selection of embedded molecular wire loading and tuning of the concentration. Electron transfer processes of visible light excited ZrOCo or TiOCo light absorbers coupled to silica embedded wires and Co oxide catalyst are being explored by transient optical spectroscopy and photoelectrochemical methods, and will be the main topic of the presentation.8 Time permitting, recent application of ultrathin silica membrane with embedded molecular wires for separating incompatible catalytic environments of electronically coupled inorganic and microbial components will also be discussed.9 [1] Kim, W.; Edri, E.; Frei, H. Acc. Chem. Res. 49, 1634 (2016) [2] Kim, W.; McClure, B. A.; Edri, E.; Frei, H. Chem. Soc. Rev. 45, 3221 (2016) [3] Edri, E.; Aloni, S.; Frei, H., ACS Nano, submitted [4] Yuan, G.; Agiral, A.; Pellet, N.; Kim, W.; Frei, H. Faraday Discuss. 176, 233 (2014) [5] Edri, E.; Frei, H. J. Phys. Chem. C 119, 28326 (2015) [6] Frei, H. Curr. Opin. Electrochem. 2, 128 (2017) [7] Edri, E.; Cooper, J. K.; Sharp, I. D.; Guldi, D. M.; Frei, H. J. Am. Chem. Soc. 139, 5458 (2017) [8] Katsoukis, G.; Frei, H., to be submitted [9] Cornejo, J. A.; Sheng, H.; Edri, E.; Ajo-Franklin, C.; Frei, H., submitted

Reversible Visible-Light Photooxidation of an Oxomanganese Water-Oxidation Catalyst Covalently Anchored to TiO2Nanoparticles†

2010 ◽  
Vol 114 (45) ◽  
pp. 14214-14222 ◽  
Author(s):  
Gonghu Li ◽  
Eduardo M. Sproviero ◽  
William R. McNamara ◽  
Robert C. Snoeberger ◽  
Robert H. Crabtree ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Oxidation ◽  
Oxidation Catalyst

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.

scholarly journals Ultrafast Charge Transfer between Light Absorber and Co3O4 Water Oxidation Catalyst across Molecular Wires Embedded in Silica Membrane

2017 ◽  
Vol 139 (15) ◽  
pp. 5458-5466 ◽  
Author(s):  
Eran Edri ◽  
Jason K. Cooper ◽  
Ian D. Sharp ◽  
Dirk M. Guldi ◽  
Heinz Frei
Keyword(s):  
Charge Transfer ◽  
Water Oxidation ◽  
Molecular Wires ◽  
Oxidation Catalyst ◽  
Silica Membrane ◽  
Light Absorber ◽  
Ultrafast Charge Transfer

scholarly journals Correction: [{β-SiNi2W10O36(OH)2(H2O)}4]24−: a new robust visible light-driven water oxidation catalyst based on nickel-containing polyoxometalate

2016 ◽  
Vol 52 (100) ◽  
pp. 14498-14499 ◽  
Author(s):  
Li Yu ◽  
Yong Ding ◽  
Min Zheng ◽  
Hongli Chen ◽  
Junwei Zhao
Keyword(s):  
Visible Light ◽  
Water Oxidation ◽  
Oxidation Catalyst ◽  
Li Yu ◽  
Visible Light Driven

Correction for ‘[{β-SiNi2W10O36(OH)2(H2O)}4]24−: a new robust visible light-driven water oxidation catalyst based on nickel-containing polyoxometalate’ by Li Yu et al., Chem. Commun., 2016, DOI: 10.1039/c6cc02728h.

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