Photoelectrochemical conversion using reaction-centre electrodes

Janzen, A. Frederick; Seibert, Michael

doi:10.1038/286584a0

Cited by 62 publications

(40 citation statements)

References 11 publications

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“…74 The cell had a two electrode configuration with a photoactive RC coated working electrode and a Pt or SnO 2 counter electrode in 0.1 M Na 2 SO 4 electrolyte containing suitable buffer solutions. 74 RCs were immobilized by a rather simple method of dipping the electrode in a concentrated suspension of 70 RCs, thereby the RCs are physically adsorbed to the electrode when dried.…”

Section: Bare Electrodesmentioning

confidence: 99%

Progress and perspectives in exploiting photosynthetic biomolecules for solar energy harnessing

Ravi

Tan

2015

Energy Environ. Sci.

104

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5Photosynthetic proteins are emerging as a new class of photovoltaic materials as their nature-designed architecture and internal circuitry are so sophisticated that they carry out the initial light-driven steps of photosynthesis with ≈ 100% quantum efficiency. Research on bioinspired solar cells has increased in recent years as they promise better efficiency than the conventional p-n junction solar cells that have limited conversion efficiency (34%). Since it is a mammoth task to perfectly mimic the intricate proteins 10 evolved in nature, the idea of interfacing the natural proteins with engineered materials seems propitious for developing biohybrid solar cells. Herein, we summarize various approaches in immobilizing the photosynthetic biomolecules in photovoltaic devices and the progress in the photocurrent generation achieved. This review highlights the multidisciplinary nature of photosynthetic biohybrid devices and their future prospects in light of some of the research challenges and discrepancies witnessed by this field. 15 The fascinating aspect of this research area is that it guides the biologists to explore the possibilities of improving protein stability and robustness suitable for solar cells and inspires the solar cell researchers to explore the physics behind the working mechanisms of biohybrid solar cells which can generate novel architectures in future solar energy conversion devices. 60 superior system and mechanism for light harvesting and energy conversion. Their quantum efficiencies 17 are higher than that of the manmade solar cells. [18][19][20] Photosynthesis is an exemplary model for solar cell research as it is the prime mover powering the biological world, the mechanism behind the energy storage in 65 fossil fuels and the sustainer of earth's oxygenated atmosphere. 21 The architecture and the internal circuitry of the photosynthetic systems are very sophisticated that the initial light driven steps have ≈ 100% quantum efficiency. 18,22,23 Bioinspiration of photosynthesis in solar cells has instigated novel research 70 perspectives which are, in close pace, moving towards devising a high efficiency solar cell. Artificial Photosynthesis is one novel approach that tries to emulate the natural photosynthetic systems REVIEW This journal is © The Royal Society of Chemistry [year] [journal], [year], [vol], 00-00 | 9Fig. 7 (a) Two possible ways of RC binding and ET pathways between RC and electrode. P-primary electron donor (special pair), B-monomeric bacteriochlorophyll, H-bacteriopheophytin, Qa and Qb-primary and secondary electron acceptors (quinones). [Adapted from ref. 81 and ref.34, with permission from Elsevier Ltd] (b) Photoinduced-and dark-electron transfers in RC-Cyt-SAM-Gold electrode [Adapted with permission from ref.82,

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Section: Bare Electrodesmentioning

confidence: 99%

Progress and perspectives in exploiting photosynthetic biomolecules for solar energy harnessing

Ravi

Tan

2015

Energy Environ. Sci.

104

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“…Besides metal cathodes [ 14 , 15 ], the researchers focus in the fi rst place on Si [ 16 ], TiO 2 [ 17 ], and Cu 2 O [ 18 ]. To improve the effi ciency of these electrodes, most of the studies deal with their functionalization using photosystem I [ 19 ], hydrogenases [ 17 , 20 , 21 ], or bioinspired molecular cocatalysts [ 17 , 22 ]. Immobilization of hydrogenase on electrodes has the advantage that the hydrogen evolution can be electrochemically controlled and spatially separated from the oxygen evolution, so that no oxyhydrogen gas is produced.…”

Section: Biohybrid Photocathodesmentioning

confidence: 99%

Solar Photoelectrochemical Water Splitting with Bioconjugate and Bio-Hybrid Electrodes

Bora

Braun

Gajda‐Schrantz

2015

From Molecules to Materials

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Biohybrid electrodes of different types have been described in the current chapter. The biohybrid photoanodes and photocathodes are new class of materials for solar energy application by utilizing the mother nature's photosynthetic units and its biomimetic counterparts. The physical characteristics and the performance of the biohybrid electrodes have been described in terms of charge transfer, hydrogen evolution, and stability in harsh electrochemical environment.

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“…Bioelectronics is a new emerging field, at the interface of molecular biology and submicrometer electronics [76]. Examples of bioelectronic devices include biosensors [77±79], bioactuators [80], photovoltaic cells [81,82], DNA microchips [83,84], and cellular automata [85]. The capabilities of biosensors and bioelectronic devices can be expanded if biomolecules can be deposited in microscopically defined arrays on surfaces [83,86].…”

Section: Applications Examples and Conclusionmentioning

confidence: 99%

Surface‐Directed Colloid Patterning: Selective Deposition via Electrostatic and Secondary Interactions

Hammond

2003

Colloids and Colloid Assemblies

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A great deal of excitement has been generated around the idea of controlled and ordered arrays of micron-to nanometer-scale particles arranged on surfaces. The ability to direct the positions of such small ªobjectsº onto a substrate provides a large advantage in the creation of molecular-to nanometer-scale devices, biological sensors, combinatorial arrays, and electronic and photonic devices. For these reasons, a number of approaches have been investigated which involve the manipulation of colloidal systems using electrostatics [1±6], lithography, dip-coating, physical confinement in etched or molded grooves [7], sedimentation [8±13], capillary forces [14], flow fields [15, 16], electrophoretics [17], and microfluidics to guide specific systems to different regions of a surface. An especially compelling approach to directing deposition is to use secondary interactions such as coulombic interactions, hydrogen bonding, hydrophobic interactions, and biospecific interactions, as a means of guiding different elements to a surface. This form of self-assembly provides the basis for positioning a broad range of elements based on the presence of complementary functional groups on planar and nonplanar surfaces; this concept of ªsurface sortingº has been explored in our group with polyelectrolytes [18±21], and more recently, colloidal particles [22±25], as a potential tool in microfabrication. The chemical basis of this approach is the use of surface functionality for templating and directing the assembly of nanometer to micron-sized materials systems.The concept of surface sorting is illustrated schematically in Fig. 10.1. A chemically patterned surface containing different regions of charged, hydrogen bonding, hydrophobic, or biospecific ligand groups, acts as a template to which materials species of complementary functionality deposit onto their corresponding sites. This process can take place through a series of sequential adsorption steps, or, under highly controlled conditions with more specific interactions, it may be possible to achieve the desired effect in a single step. This concept is universal, and can be extended to a broad range of systems, including polyelectrolytes, colloidal particles, proteins, DNA, nanotubes, etc. Nonlithographic patterning methods, particularly contact printing techniques [26], allow us to create such systems on a

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Photoelectrochemical conversion using reaction-centre electrodes

Cited by 62 publications

References 11 publications

Progress and perspectives in exploiting photosynthetic biomolecules for solar energy harnessing

Progress and perspectives in exploiting photosynthetic biomolecules for solar energy harnessing

Solar Photoelectrochemical Water Splitting with Bioconjugate and Bio-Hybrid Electrodes

Surface‐Directed Colloid Patterning: Selective Deposition via Electrostatic and Secondary Interactions

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