151
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Dai F, Yap GPA, Theopold KH. The Direct Oxidative Addition of O2 to a Mononuclear Cr(I) Complex Is Spin Forbidden. J Am Chem Soc 2013; 135:16774-6. [DOI: 10.1021/ja408357x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fang Dai
- Department of Chemistry and
Biochemistry, University of Delaware, Newark, Delaware 19716
| | - Glenn P. A. Yap
- Department of Chemistry and
Biochemistry, University of Delaware, Newark, Delaware 19716
| | - Klaus H. Theopold
- Department of Chemistry and
Biochemistry, University of Delaware, Newark, Delaware 19716
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152
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Graeupner J, Hintermair U, Huang DL, Thomsen JM, Takase M, Campos J, Hashmi SM, Elimelech M, Brudvig GW, Crabtree RH. Probing the Viability of Oxo-Coupling Pathways in Iridium-Catalyzed Oxygen Evolution. Organometallics 2013; 32:5384-5390. [PMID: 24474842 PMCID: PMC3902142 DOI: 10.1021/om400658a] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A series of Cp*IrIII dimers have been synthesized to elucidate the mechanistic viability of radical oxo-coupling pathways in iridium-catalyzed O2 evolution. The oxidative stability of the precursors toward nanoparticle formation and their oxygen evolution activity have been investigated and compared to suitable monomeric analogues. We found that precursors bearing monodentate NHC ligands degraded to form nanoparticles (NPs), and accordingly their O2 evolution rates were not significantly influenced by their nuclearity or distance between the two metals in the dimeric precursors. A doubly chelating bis-pyridine-pyrazolide ligand provided an oxidation-resistant ligand framework that allowed a more meaningful comparison of catalytic performance of dimers with their corresponding monomers. With sodium periodate (NaIO4) as the oxidant, the dimers provided significantly lower O2 evolution rates per [Ir] than the monomer, suggesting a negative interaction instead of cooperativity in the catalytic cycle. Electrochemical analysis of the dimers further substantiates the notion that no radical oxyl-coupling pathways are accessible. We thus conclude that the alternative path, nucleophilic attack of water on high-valent Ir-oxo species, may be the preferred mechanistic pathway of water oxidation with these catalysts, and bimolecular oxo-coupling is not a valid mechanistic alternative as in the related ruthenium chemistry, at least in the present system.
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Affiliation(s)
- Jonathan Graeupner
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520, United States
| | - Ulrich Hintermair
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520, United States
- Centre for Sustainable Chemical Technologies, University of Bath, Bath BA2 7AY, UK
| | - Daria L. Huang
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520, United States
| | - Julianne M. Thomsen
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520, United States
| | - Mike Takase
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520, United States
| | - Jesús Campos
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520, United States
| | - Sara M. Hashmi
- Department of Chemical and Environmental Engineering, Yale University, 9 Hillhouse Avenue, New Haven, Connecticut 06520, United States
| | - Menachem Elimelech
- Department of Chemical and Environmental Engineering, Yale University, 9 Hillhouse Avenue, New Haven, Connecticut 06520, United States
| | - Gary W. Brudvig
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520, United States
| | - Robert H. Crabtree
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520, United States
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153
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Hirahara M, Shoji A, Yagi M. Artificial Manganese Center Models for Photosynthetic Oxygen Evolution in Photosystem II. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300683] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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154
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Mattioli G, Giannozzi P, Amore Bonapasta A, Guidoni L. Reaction pathways for oxygen evolution promoted by cobalt catalyst. J Am Chem Soc 2013; 135:15353-63. [PMID: 24044778 DOI: 10.1021/ja401797v] [Citation(s) in RCA: 129] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The in-depth understanding of the molecular mechanisms regulating the water oxidation catalysis is of key relevance for the rationalization and the design of efficient oxygen evolution catalysts based on earth-abundant transition metals. Performing ab initio DFT+U molecular dynamics calculations of cluster models in explicit water solution, we provide insight into the pathways for oxygen evolution of a cobalt-based catalyst (CoCat). The fast motion of protons at the CoCat/water interface and the occurrence of cubane-like Co-oxo units at the catalyst boundaries are the keys to unlock the fast formation of O-O bonds. Along the resulting pathways, we identified the formation of Co(IV)-oxyl species as the driving ingredient for the activation of the catalytic mechanism, followed by their geminal coupling with O atoms coordinated by the same Co. Concurrent nucleophilic attack of water molecules coming directly from the water solution is discouraged by high activation barriers. The achieved results suggest also interesting similarities between the CoCat and the Mn4Ca-oxo oxygen evolving complex of photosystem II.
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Affiliation(s)
- Giuseppe Mattioli
- Istituto di Struttura della Materia del CNR , v. Salaria Km 29,300, C.P. 10 I-00015, Monterotondo Stazione (RM), Italy
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155
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Pintado S, Goberna-Ferrón S, Escudero-Adán EC, Galán-Mascarós JR. Fast and Persistent Electrocatalytic Water Oxidation by Co–Fe Prussian Blue Coordination Polymers. J Am Chem Soc 2013; 135:13270-3. [DOI: 10.1021/ja406242y] [Citation(s) in RCA: 298] [Impact Index Per Article: 27.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Sara Pintado
- Institute of Chemical Research of Catalonia (ICIQ), Av. Paisos Catalans 16, E-43007 Tarragona, Spain
| | - Sara Goberna-Ferrón
- Institute of Chemical Research of Catalonia (ICIQ), Av. Paisos Catalans 16, E-43007 Tarragona, Spain
| | - Eduardo C. Escudero-Adán
- Institute of Chemical Research of Catalonia (ICIQ), Av. Paisos Catalans 16, E-43007 Tarragona, Spain
| | - José Ramón Galán-Mascarós
- Institute of Chemical Research of Catalonia (ICIQ), Av. Paisos Catalans 16, E-43007 Tarragona, Spain
- Catalan Institution for Research and Advanced Studies (ICREA), Passeig Lluis Companys, 23, E-08010, Barcelona, Spain
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156
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Breivogel A, Meister M, Förster C, Laquai F, Heinze K. Excited state tuning of bis(tridentate) ruthenium(II) polypyridine chromophores by push-pull effects and bite angle optimization: a comprehensive experimental and theoretical study. Chemistry 2013; 19:13745-60. [PMID: 24000040 DOI: 10.1002/chem.201302231] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Indexed: 01/22/2023]
Abstract
The synergy of push-pull substitution and enlarged ligand bite angles has been used in functionalized heteroleptic bis(tridentate) polypyridine complexes of ruthenium(II) to shift the (1) MLCT absorption and the (3) MLCT emission to lower energy, enhance the emission quantum yield, and to prolong the (3) MLCT excited-state lifetime. In these complexes, that is, [Ru(ddpd)(EtOOC-tpy)][PF6 ]2 , [Ru(ddpd-NH2 )(EtOOC-tpy)][PF6 ]2 , [Ru(ddpd){(MeOOC)3 -tpy}][PF6 ]2 , and [Ru(ddpd-NH2 ){(EtOOC)3 -tpy}][PF6 ]2 the combination of the electron-accepting 2,2';6',2''-terpyridine (tpy) ligand equipped with one or three COOR substituents with the electron-donating N,N'-dimethyl-N,N'-dipyridin-2-ylpyridine-2,6-diamine (ddpd) ligand decorated with none or one NH2 group enforces spatially separated and orthogonal frontier orbitals with a small HOMO-LUMO gap resulting in low-energy (1) MLCT and (3) MLCT states. The extended bite angle of the ddpd ligand increases the ligand field splitting and pushes the deactivating (3) MC state to higher energy. The properties of the new isomerically pure mixed ligand complexes have been studied by using electrochemistry, UV/Vis absorption spectroscopy, static and time-resolved luminescence spectroscopy, and transient absorption spectroscopy. The experimental data were rationalized by using density functional calculations on differently charged species (charge n=0-4) and on triplet excited states ((3) MLCT and (3) MC) as well as by time-dependent density functional calculations (excited singlet states).
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Affiliation(s)
- Aaron Breivogel
- Institute of Inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg-University of Mainz, Duesbergweg 10-14, 55128 Mainz (Germany), Fax: (+49) 6131-39-27-277
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157
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158
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159
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Joya KS, Joya YF, Ocakoglu K, van de Krol R. Water-Splitting Catalysis and Solar Fuel Devices: Artificial Leaves on the Move. Angew Chem Int Ed Engl 2013; 52:10426-37. [DOI: 10.1002/anie.201300136] [Citation(s) in RCA: 395] [Impact Index Per Article: 35.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Indexed: 11/10/2022]
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160
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Joya KS, Joya YF, Ocakoglu K, van de Krol R. Katalytische Wasserspaltung und Solarbrennstoffzellen: künstliche Blätter auf dem Vormarsch. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201300136] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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161
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Savini A, Bucci A, Bellachioma G, Rocchigiani L, Zuccaccia C, Llobet A, Macchioni A. Mechanistic Aspects of Water Oxidation Catalyzed by Organometallic Iridium Complexes. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300530] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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162
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Badiei YM, Polyansky DE, Muckerman JT, Szalda DJ, Haberdar R, Zong R, Thummel RP, Fujita E. Water Oxidation with Mononuclear Ruthenium(II) Polypyridine Complexes Involving a Direct RuIV═O Pathway in Neutral and Alkaline Media. Inorg Chem 2013; 52:8845-50. [DOI: 10.1021/ic401023w] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yosra M. Badiei
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - Dmitry E. Polyansky
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - James T. Muckerman
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - David J. Szalda
- Department of Natural Science, Baruch College, CUNY, New York, New York 10010, United States
| | - Rubabe Haberdar
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United
States
| | - Ruifa Zong
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United
States
| | - Randolph P. Thummel
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United
States
| | - Etsuko Fujita
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
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163
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Guan X, Chan SLF, Che CM. A Highly Oxidizing and Isolable Oxoruthenium(V) Complex [RuV(N4O)(O)]2+: Electronic Structure, Redox Properties, and Oxidation Reactions Investigated by DFT Calculations. Chem Asian J 2013; 8:2046-56. [DOI: 10.1002/asia.201300458] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Indexed: 11/11/2022]
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164
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Energetic basis of catalytic activity of layered nanophase calcium manganese oxides for water oxidation. Proc Natl Acad Sci U S A 2013; 110:8801-6. [PMID: 23667149 DOI: 10.1073/pnas.1306623110] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Previous measurements show that calcium manganese oxide nanoparticles are better water oxidation catalysts than binary manganese oxides (Mn3O4, Mn2O3, and MnO2). The probable reasons for such enhancement involve a combination of factors: The calcium manganese oxide materials have a layered structure with considerable thermodynamic stability and a high surface area, their low surface energy suggests relatively loose binding of H2O on the internal and external surfaces, and they possess mixed-valent manganese with internal oxidation enthalpy independent of the Mn(3+)/Mn(4+) ratio and much smaller in magnitude than the Mn2O3-MnO2 couple. These factors enhance catalytic ability by providing easy access for solutes and water to active sites and facile electron transfer between manganese in different oxidation states.
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165
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Stracke JJ, Finke RG. Water Oxidation Catalysis Beginning with 2.5 μM [Co4(H2O)2(PW9O34)2]10–: Investigation of the True Electrochemically Driven Catalyst at ≥600 mV Overpotential at a Glassy Carbon Electrode. ACS Catal 2013. [DOI: 10.1021/cs400141t] [Citation(s) in RCA: 114] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Jordan J. Stracke
- Chemistry
Department, Colorado State University,
Fort Collins, Colorado 80523, United States
| | - Richard G. Finke
- Chemistry
Department, Colorado State University,
Fort Collins, Colorado 80523, United States
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166
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Soriano-López J, Goberna-Ferrón S, Vigara L, Carbó JJ, Poblet JM, Galán-Mascarós JR. Cobalt polyoxometalates as heterogeneous water oxidation catalysts. Inorg Chem 2013; 52:4753-5. [PMID: 23611185 DOI: 10.1021/ic4001945] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An insoluble salt of the water oxidation catalyst [Co9(H2O)6(OH)3(HPO4)2(PW9O34)3](16-) (Co9) has been used to modify amorphous carbon paste electrodes. The catalytic activity of this polyoxometalate is maintained in the solid state. Good catalytic rates are reached at reasonable overpotentials. As a heterogeneous catalyst, Co9 shows a remarkable long-term stability in turnover conditions. The oxygen evolution rate remains constant for hours without the appearance of any sign of fatigue or decomposition in a large pH range, including acidic conditions, where metal oxides are unstable.
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Affiliation(s)
- Joaquín Soriano-López
- Institute of Chemical Research of Catalonia (ICIQ), Avenida Països Catalans 16, E-43007 Tarragona, Spain
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167
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Zhang G, Chen K, Chen H, Yao J, Shaik S. What Factors Control O2 Binding and Release Thermodynamics in Mononuclear Ruthenium Water Oxidation Catalysts? A Theoretical Exploration. Inorg Chem 2013; 52:5088-96. [DOI: 10.1021/ic3028644] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Guiling Zhang
- Key Laboratory
of Green Chemical Technology of College of Heilongjiang Province,
College of Chemical and Environmental Engineering, Harbin University of Science and Technology, Harbin 150080,
China
| | - Kejuan Chen
- Key Laboratory
of Green Chemical Technology of College of Heilongjiang Province,
College of Chemical and Environmental Engineering, Harbin University of Science and Technology, Harbin 150080,
China
- Beijing National
Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Photochemistry,
Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Hui Chen
- Beijing National
Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Photochemistry,
Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Jiannian Yao
- Beijing National
Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Photochemistry,
Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Sason Shaik
- Institute of Chemistry and the Lise Meitner-Minerva Center for Computational
Quantum Chemistry, The Hebrew University of Jerusalem, Givat Ram Campus, 91904 Jerusalem, Israel
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168
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Codolà Z, M. S. Cardoso J, Royo B, Costas M, Lloret-Fillol J. Highly Effective Water Oxidation Catalysis with Iridium Complexes through the Use of NaIO4. Chemistry 2013; 19:7203-13. [DOI: 10.1002/chem.201204568] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2012] [Revised: 02/15/2013] [Indexed: 12/12/2022]
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169
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Kang R, Yao J, Chen H. Are DFT Methods Accurate in Mononuclear Ruthenium-Catalyzed Water Oxidation? An ab Initio Assessment. J Chem Theory Comput 2013; 9:1872-9. [DOI: 10.1021/ct400004j] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Runhua Kang
- Beijing National Laboratory
for Molecular Sciences
(BNLMS), CAS Key Laboratory of Photochemistry, Institute of Chemistry,
Chinese Academy of Sciences, Beijing, 100190, China
| | - Jiannian Yao
- Beijing National Laboratory
for Molecular Sciences
(BNLMS), CAS Key Laboratory of Photochemistry, Institute of Chemistry,
Chinese Academy of Sciences, Beijing, 100190, China
| | - Hui Chen
- Beijing National Laboratory
for Molecular Sciences
(BNLMS), CAS Key Laboratory of Photochemistry, Institute of Chemistry,
Chinese Academy of Sciences, Beijing, 100190, China
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170
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Zhang MT, Chen Z, Kang P, Meyer TJ. Electrocatalytic Water Oxidation with a Copper(II) Polypeptide Complex. J Am Chem Soc 2013; 135:2048-51. [DOI: 10.1021/ja3097515] [Citation(s) in RCA: 386] [Impact Index Per Article: 35.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Ming-Tian Zhang
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
27599, United States
| | - Zuofeng Chen
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
27599, United States
| | - Peng Kang
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
27599, United States
| | - Thomas J. Meyer
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
27599, United States
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171
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Amini M, Bagherzadeh M, Moradi-Shoeili Z, Boghaei DM, Ellern A, Woo LK. Selective oxidation of sulfides and olefins by a manganese(III) complex containing an N,O-type bidentate oxazine ligand. J COORD CHEM 2013. [DOI: 10.1080/00958972.2012.761339] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Mojtaba Amini
- a Faculty of Science, Department of Chemistry , University of Maragheh , Maragheh , Iran
| | | | | | - Davar M. Boghaei
- b Chemistry Department , Sharif University of Technology , Tehran , Iran
| | - Arkady Ellern
- c Chemistry Department , Iowa State University , Ames , IA , USA
| | - L. Keith Woo
- c Chemistry Department , Iowa State University , Ames , IA , USA
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172
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Swierk JR, Mallouk TE. Design and development of photoanodes for water-splitting dye-sensitized photoelectrochemical cells. Chem Soc Rev 2013; 42:2357-87. [DOI: 10.1039/c2cs35246j] [Citation(s) in RCA: 453] [Impact Index Per Article: 41.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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173
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Electrochemical controlled synthesis and characterization of well-aligned IrO2 nanotube arrays with enhanced electrocatalytic activity toward oxygen evolution reaction. J Electroanal Chem (Lausanne) 2013. [DOI: 10.1016/j.jelechem.2012.08.032] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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174
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Rumberger EMW, Ahn HS, Bell AT, Tilley TD. Water oxidation catalysis via immobilization of the dimanganese complex [Mn2(μ-O)2Cl(μ-O2CCH3)(bpy)2(H2O)](NO3)2 onto silica. Dalton Trans 2013; 42:12238-47. [DOI: 10.1039/c3dt51472b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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175
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Young KMH, Klahr BM, Zandi O, Hamann TW. Photocatalytic water oxidation with hematite electrodes. Catal Sci Technol 2013. [DOI: 10.1039/c3cy00310h] [Citation(s) in RCA: 116] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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176
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Joya KS, Vallés-Pardo JL, Joya YF, Eisenmayer T, Thomas B, Buda F, de Groot HJM. Molecular Catalytic Assemblies for Electrodriven Water Splitting. Chempluschem 2012. [DOI: 10.1002/cplu.201200161] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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177
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Bucci A, Savini A, Rocchigiani L, Zuccaccia C, Rizzato S, Albinati A, Llobet A, Macchioni A. Organometallic Iridium Catalysts Based on Pyridinecarboxylate Ligands for the Oxidative Splitting of Water. Organometallics 2012. [DOI: 10.1021/om301024s] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Alberto Bucci
- Dipartimento
di Chimica, University of Perugia, Via Elce di Sotto 8, Perugia, Italy
| | - Arianna Savini
- Dipartimento
di Chimica, University of Perugia, Via Elce di Sotto 8, Perugia, Italy
| | - Luca Rocchigiani
- Dipartimento
di Chimica, University of Perugia, Via Elce di Sotto 8, Perugia, Italy
| | - Cristiano Zuccaccia
- Dipartimento
di Chimica, University of Perugia, Via Elce di Sotto 8, Perugia, Italy
| | - Silvia Rizzato
- Dipartimento di Chimica, University of Milano, Via Golgi 19, Milano, Italy
| | - Alberto Albinati
- Dipartimento di Chimica, University of Milano, Via Golgi 19, Milano, Italy
| | - Antoni Llobet
- Institute of Chemical Research of Catalonia, Avinguda Paı̈sos
Catalans 16, Tarragona, Spain
| | - Alceo Macchioni
- Dipartimento
di Chimica, University of Perugia, Via Elce di Sotto 8, Perugia, Italy
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178
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Goberna-Ferrón S, Vigara L, Soriano-López J, Galán-Mascarós JR. Identification of a nonanuclear {Co(II)9} polyoxometalate cluster as a homogeneous catalyst for water oxidation. Inorg Chem 2012; 51:11707-15. [PMID: 23078372 DOI: 10.1021/ic301618h] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The polyanion of formula {Co(9)(H(2)O)(6)(OH)(3)(HPO(4))(2)(PW(9)O(34))(3)}(16-) (Co(9)) contains a central nonacobalt core held together by hydroxo and hydrogen phosphate bridges and supported by three lacunary Keggin-type polyphosphotungstate ligands. Our data demonstrate that Co(9) is a homogeneous catalyst for water oxidation. Catalytic water electrolysis on fluorine-doped tin oxide coated glass electrodes occurs at reasonable low overpotentials and rates when Co(9) is present in a sodium phosphate buffer solution at neutral pH. We carried out our experiments with an excess of 2,2'-bipyridyl as the chelating agent for free aqueous Co(II) ions, in order to avoid the formation of a cobalt oxide film on the electrode, as observed for other polyoxometalate catalysts. In these conditions, no heterogeneous catalyst forms on the anode, and it does not show any deposited material or significant catalytic activity after a catalytic cycle. Co(9) is also an extremely robust catalyst for chemical water oxidation. It is able to continuously catalyze oxygen evolution during days from a buffered sodium hypochlorite solution, maintaining constant rates and efficiencies without any significant apparition of fatigue.
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Affiliation(s)
- Sara Goberna-Ferrón
- Institute of Chemical Research of Catalonia, Avenida Països Catalans 16, E-43007 Tarragona, Spain
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179
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Sarma R, Angeles-Boza AM, Brinkley DW, Roth JP. Studies of the Di-iron(VI) Intermediate in Ferrate-Dependent Oxygen Evolution from Water. J Am Chem Soc 2012; 134:15371-86. [DOI: 10.1021/ja304786s] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Rupam Sarma
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland
21218, United States
| | - Alfredo M. Angeles-Boza
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland
21218, United States
| | - David W. Brinkley
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland
21218, United States
| | - Justine P. Roth
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland
21218, United States
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Najafpour MM, Rahimi F, Aro EM, Lee CH, Allakhverdiev SI. Nano-sized manganese oxides as biomimetic catalysts for water oxidation in artificial photosynthesis: a review. J R Soc Interface 2012; 9:2383-95. [PMID: 22809849 DOI: 10.1098/rsif.2012.0412] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
There has been a tremendous surge in research on the synthesis of various metal compounds aimed at simulating the water-oxidizing complex (WOC) of photosystem II (PSII). This is crucial because the water oxidation half reaction is overwhelmingly rate-limiting and needs high over-voltage (approx. 1 V), which results in low conversion efficiencies when working at current densities required for hydrogen production via water splitting. Particular attention has been given to the manganese compounds not only because manganese has been used by nature to oxidize water but also because manganese is cheap and environmentally friendly. The manganese-calcium cluster in PSII has a dimension of about approximately 0.5 nm. Thus, nano-sized manganese compounds might be good structural and functional models for the cluster. As in the nanometre-size of the synthetic models, most of the active sites are at the surface, these compounds could be more efficient catalysts than micrometre (or bigger) particles. In this paper, we focus on nano-sized manganese oxides as functional and structural models of the WOC of PSII for hydrogen production via water splitting and review nano-sized manganese oxides used in water oxidation by some research groups.
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Affiliation(s)
- Mohammad Mahdi Najafpour
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, Iran.
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