Molecular catalysts for wateroxidation toward artificial photosynthesis

Yagi, Masayuki; Syouji, Akinori; Yamada, Satoshi; Komi, Manabu; Yamazaki, Hirosato; Tajima, Shunji

doi:10.1039/b811098k

Cited by 103 publications

(63 citation statements)

References 60 publications

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“…The majority of these catalysts are based on inorganic Ru, Ir, or Mn complexes. [15,16] Of these catalysts only a few have been successfully attached to electrode surfaces, which is a prerequisite for their incorporation into photoelectrochemical devices. [17] To the best of our knowledge there are no reports of the successful integration of these types of water oxidation catalysts with a solar cell into a tandem water-splitting device.…”

mentioning

confidence: 99%

A Tandem Water‐Splitting Device Based on a Bio‐inspired Manganese Catalyst

et al. 2010

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mentioning

confidence: 99%

A Tandem Water‐Splitting Device Based on a Bio‐inspired Manganese Catalyst

et al. 2010

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“…The present approach is in some contrast to a more radical suggestion of how to use chemistry for building an artificial photosynthesis device [37,[58][59][60][61][62][63] as a single-step process. [175] This most challenging approach may be an element in higher-generation [181] energy supply networks.…”

Section: Discussionmentioning

confidence: 87%

“…This assumption is based upon the notion that it is very hard to simultaneously optimize a network of photon-driven charge separation systems and devices allowing to use the energy of the charge separation immediately for conversion into chemical energy, [45,50,51,63] such as hydrogen. Due to conflicting property requests, this task is much more difficult if charge separation and energy conversion are coupled into a single device (such as a chemical water splitter or an "artificial leaf").…”

Section: Wwwchemsuschemorgmentioning

confidence: 99%

The Role of Chemistry in the Energy Challenge

2010

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Chemistry with its key targets of providing materials and processes for conversion of matter is at the center stage of the energy challenge. Most energy conversion systems work on (bio)chemical energy carriers and require for their use suitable process and material solutions. The enormous scale of their application demands optimization beyond the incremental improvement of empirical discoveries. Knowledge-based systematic approaches are mandatory to arrive at scalable and sustainable solutions. Chemistry for energy, "ENERCHEM" contributes in many ways already today to the use of fossil energy carriers. Optimization of these processes exemplified by catalysis for fuels and chemicals production or by solid-state lightning can contribute in the near future substantially to the dual challenge of energy use and climate protection being in fact two sides of the same challenge. The paper focuses on the even greater role that ENERCHEM will have to play in the era of renewable energy systems where the storage of solar energy in chemical carries and batteries is a key requirement. A multidisciplinary and diversified approach is suggested to arrive at a stable and sustainable system of energy conversion processes. The timescales for transformation of the present energy scenario will be decades and the resources will be of global economic dimensions. ENERCHEM will have to provide the reliable basis for such technologies based on deep functional understanding.

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“…Water oxidation is the so-called "bottleneck of artificial photosynthesis" because of the simultaneous transfer of four electrons and the relatively high equilibrium electrode potential (1.23 V vs. NHE at pH 0) [11]. Many complexes containing Ru, Mn, Ir, Fe, Cu, and Co have been reported as molecular water oxidation catalysts [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. One advantage of using molecular catalysts is the possibility of elucidating the reaction mechanism.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Water Oxidation Catalyzed by a Dinuclear Ruthenium Complex Bridged by Anthraquinone

et al. 2017

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Abstract:We synthesized 1,8-bis(2,2 :6 ,2"-terpyrid-4 -yl)anthraquinone (btpyaq) as a new dimerizing ligand and determined its single crystal structure by X-ray analysis. The dinuclear Ruthenium complex [Ru 2 (µ-Cl)(bpy) 2 (btpyaq)](BF 4 ) 3 ([3](BF 4 ) 3 , bpy = 2,2 -bipyridine) was used as a catalyst for water oxidation to oxygen with (NH 4 ) 2 [Ce(NO 3 ) 6 ] as the oxidant (turnover numbers = 248). The initial reaction rate of oxygen evolution was directly proportional to the concentration of the catalyst and independent of the oxidant concentration. The cyclic voltammogram of [3](BF 4 ) 3 in water at pH 1.3 showed an irreversible catalytic current above +1.6 V (vs. SCE), with two quasi-reversible waves and one irreversible wave at E 1/2 = +0.62, +0.82 V, and E pa = +1.13 V, respectively. UV-vis and Raman spectra of

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Molecular catalysts for wateroxidation toward artificial photosynthesis

Abstract: Synthesis, crystal structure, solution and spectroscopic properties, and hydrogen-evolving activity of [K(18-crown-6)][Pt(II)(2-phenylpyridinato)Cl 2 ]

Cited by 103 publications

References 60 publications

A Tandem Water‐Splitting Device Based on a Bio‐inspired Manganese Catalyst

A Tandem Water‐Splitting Device Based on a Bio‐inspired Manganese Catalyst

The Role of Chemistry in the Energy Challenge

Mechanism of Water Oxidation Catalyzed by a Dinuclear Ruthenium Complex Bridged by Anthraquinone

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