Coupled artificial photosynthesis

Yadav RK, Baeg J-O, Oh GH, Park N-J, Kong K, Kim J, Hwang DW, Biswas SK. A pho-tocatalyst-enzyme coupled artificial photosynthesis system for solar energy in production of formic acid from CO2. J Am Chem Soc 2012 134 11455-61. 

Splitting of Water by Combining Two Photocatalytic Reactions via Quinone Redox Couple Dissolved in Oil Phase Artificial Photosynthesis... 

Hammarstrom L, Styring S. Proton-coupled electron transfer of tyrosines in Photosystem II and model systems for artificial photosynthesis the role of a redox-active link between catalyst and photosensitizer. Energy Environ Sci. 2011 4 2379-88. 

The utilization of photogenerated ET in fuel production pathways is the ultimate goal of artificial photosynthesis. Several basic features need consideration upon coupling the electron transfer products to fuel generating... 

Photoelectrochemical water splitting Photocatalytic water splitting Coupled photovoltaic - electrolysis systems Thermochemical conversion Photobiological methods Molecular artificial photosynthesis Plasma-chemical conversion Mechano-catalytic, magnetolysis, radiolysis, etc. 

The photocatalyst, coupled with the enzyme formate dehydrogenase, was effective in photoregenerating NADH and in visible-light driven artificial photosynthesis of formic acid from CO2. 

For the general concept of artificial photosynthesis it is vital that the photoinduced charge shift reactions, which are one-electron processes, can be coupled to the multi-electron chemistry that results in stable products (H2, O2) and avoids high-energy intermediates. This requires catalytic donor and acceptor units that can accumulate oxidation and reduction equivalents, stabilize intermediates and catalyze 0-0 and H-H bond formation, respectively. The accumulative oxidation or reduction of such catalysts necessitate... 

Artificial Photosynthesis, Fig. 2 Schematic state energy diagram for photoinduced charge separation in a photosensitizer-acceptor pair. Excitation to P-A results in electron transfer with a driving force —AG that is determined by the reduction potentials for the P /P and A/A couples, the excited-state energy bs, and... 

Sahng HL, Jae HK, Park CB (2013) Coupling photocatalysis and redox biocatalysis toward biocatalyzed artificial photosynthesis. Chem Em J 19 4392-4406... 

This simple reaction is a key component in the construction of artificial photosynthesis devices (Fig. 3). The reductive formation of hydrogen in the cathode is coupled with the oxidative splitting of water in the photoanode. Once hydrogen has been collected and stored, this solar fuel can be... 

Proton-Coupled Electron Transfer in Natural and Artificial Photosynthesis... 

The most important CO2 activation process is photosynthesis in green plants, in which solar photons drive a reaction that would otherwise be uphill thermodynamically the reduction of CO2 to carbohydrates coupled to water oxidation to O2. Many metalloenzymes are involved in these processes, such as ribulose diphosphate carboxylase that fixes CO2 via nucleophihc attack on an enolate anion from a sugar. Artificial photosynthesis takes the natural version as inspiration and seeks to photochemically reduce CO2 to fuels such as MeOH. Naturally, a catalyst is needed-Re(CO)3(bpy)X holds promise in this regard by converting CO2 to CO and HCOOH. ... 

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