Efficient and selective electron mediation of cobalt complexes with cyclam and related macrocycles in the p-terphenyl-catalyzed photoreduction of carbon dioxide

Matsuoka, Shinya; Yamamoto, K.; Ogata, Tomoyuki; Kusaba, Mitsuhiro; Nakashima, Nobuaki; Fujita, Etsuko; Yanagida, Shozo

doi:10.1021/ja00055a032

Cited by 221 publications

(171 citation statements)

References 6 publications

(10 reference statements)

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“…[3][4][5][6] Their quantum efficiencies and product selectivities are quite high. For example, the quantum yield of conversion of CO 2 to CO ranges up to 38 % with fac-[Re(bpy)(CO) 3 {P(OEt) 3 …”

mentioning

confidence: 99%

Visible‐Light‐Induced Selective CO₂ Reduction Utilizing a Ruthenium Complex Electrocatalyst Linked to a p‐Type Nitrogen‐Doped Ta₂O₅ Semiconductor

et al. 2010

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Lights, CO2, action! Selective CO2 reduction by hybrid photocatalysts such as a p‐type semiconductor and a ruthenium complex catalyst (see picture) was induced by visible light. The quantum efficiency for HCOOH production was 1.9 % at 405 nm. For electron transfer, it is essential that the potential of the conduction band minimum of the semiconductor is more negative than the reduction potential of the complex catalyst.

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mentioning

confidence: 99%

Visible‐Light‐Induced Selective CO₂ Reduction Utilizing a Ruthenium Complex Electrocatalyst Linked to a p‐Type Nitrogen‐Doped Ta₂O₅ Semiconductor

et al. 2010

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“…Cobalt and iron cyclame were prepared following Matsuoka et al [18] from 1,4,8,11-tetraazacyclotetradecane (cyclame) and metal chloride, both also purchased from FLUKA.…”

Section: Methodsmentioning

confidence: 99%

Electrochemical Reduction of Oxygen at Pyrolyzed Iron and Cobalt N4-Chelates on Carbon Black Supports

Kalvelage

Mecklenburg

Kunz

et al. 2000

Chem. Eng. Technol.

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Besides platinum, various nonnoble metal compounds, when prepared appropriately, are suitable for the electrochemical reduction of oxygen in liquid electrolytes and PEM‐fuel cells. Pyrolyzed N4‐chelates, such as phthalocyanines, tetraazaannulenes and porphyrins with a central metal atom of iron or cobalt, are a very important group of compounds and have been investigated in the past. It was found that the catalytic activity, especially of phthalocyanines, was high when prepared on carbon black supports at high temperatures (400–900 °C). Investigations on tetraazaannulenes and porphyrins yielded similar results. Non‐noble metal compounds of cyclame (1,4,8,11‐tetraazacyclotetradecane), which are also N4‐chelates, were not investigated as thoroughly. However, the catalytic activities of iron and cobalt cyclames were low, compared to those of phthalocyanines. With the (GC‐MS) analysis of both decomposition products, it could be shown that the mechanism of the N4‐chelate decomposition is of decisive importance for the catalytic activity.

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“…The interactions of CO 2 with cobalt complexes can be described as follows: [20,35] The procedure is initiated with the Scheme 1. Mechanism of CO 2 conversion in the photocatalysis system composed of an electron mediator and photocatalysts under light irradiation.…”

Section: A C H T U N G T R E N N U N G (Bpy) 3 ]mentioning

confidence: 99%

“…[19] Yanagida et al reported that the combination of the oxidative pentose phosphate (OPP)-3-catalyzed photosystem with Co III L (L= cyclam or related macrocycles) as an electron mediator in solution induced efficient and selective electron transfer for the photocatalytic reduction of CO 2 . [20] There are reports on the coupling of an electron transporter with molecular light harvesters for CO 2 reduction; however, these investigations mainly center on homogenous photocatalytic systems. The construction of efficient heterogeneous photocatalytic CO 2 reduction systems based on the integration of an electron mediator with semiconductor catalysts has received much less coverage.…”

Section: Introductionmentioning

confidence: 99%

Integration of [(Co(bpy)₃]²⁺ Electron Mediator with Heterogeneous Photocatalysts for CO₂ Conversion

Lin

Hou

Zheng

et al. 2014

Chemistry An Asian Journal

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An efficient chemical system for electron generation and transfer is constructed by the integration of an electron mediator ([Co(bpy)3](2+); bpy=2,2'-bipyridine) with semiconductor photocatalysts. The introduction of [Co(bpy)3](2+) remarkably enhances the photocatalytic activity of pristine semiconductor photocatalysts for heterogeneous CO2 conversion; this is attributable to the acceleration of charge separation. Of particular interest is that the excellent photocatalytic activity of heterogeneous catalysts can be developed as a universal photocatalytic CO2 reduction system. The present findings clearly demonstrate that the integration of an electron mediator with semiconductors is a feasible process for the design and development of efficient photochemical systems for CO2 conversion.

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Efficient and selective electron mediation of cobalt complexes with cyclam and related macrocycles in the p-terphenyl-catalyzed photoreduction of carbon dioxide

Cited by 221 publications

References 6 publications

Visible‐Light‐Induced Selective CO₂ Reduction Utilizing a Ruthenium Complex Electrocatalyst Linked to a p‐Type Nitrogen‐Doped Ta₂O₅ Semiconductor

Visible‐Light‐Induced Selective CO₂ Reduction Utilizing a Ruthenium Complex Electrocatalyst Linked to a p‐Type Nitrogen‐Doped Ta₂O₅ Semiconductor

Electrochemical Reduction of Oxygen at Pyrolyzed Iron and Cobalt N4-Chelates on Carbon Black Supports

Integration of [(Co(bpy)₃]²⁺ Electron Mediator with Heterogeneous Photocatalysts for CO₂ Conversion

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Efficient and selective electron mediation of cobalt complexes with cyclam and related macrocycles in the p-terphenyl-catalyzed photoreduction of carbon dioxide

Cited by 221 publications

References 6 publications

Visible‐Light‐Induced Selective CO2 Reduction Utilizing a Ruthenium Complex Electrocatalyst Linked to a p‐Type Nitrogen‐Doped Ta2O5 Semiconductor

Visible‐Light‐Induced Selective CO2 Reduction Utilizing a Ruthenium Complex Electrocatalyst Linked to a p‐Type Nitrogen‐Doped Ta2O5 Semiconductor

Electrochemical Reduction of Oxygen at Pyrolyzed Iron and Cobalt N4-Chelates on Carbon Black Supports

Integration of [(Co(bpy)3]2+ Electron Mediator with Heterogeneous Photocatalysts for CO2 Conversion

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Visible‐Light‐Induced Selective CO₂ Reduction Utilizing a Ruthenium Complex Electrocatalyst Linked to a p‐Type Nitrogen‐Doped Ta₂O₅ Semiconductor

Visible‐Light‐Induced Selective CO₂ Reduction Utilizing a Ruthenium Complex Electrocatalyst Linked to a p‐Type Nitrogen‐Doped Ta₂O₅ Semiconductor

Integration of [(Co(bpy)₃]²⁺ Electron Mediator with Heterogeneous Photocatalysts for CO₂ Conversion