Nanostructured bilayered thin films in photoelectrochemical water splitting – A review

Choudhary, Surbhi; Upadhyay, Sumit Kumar; Kumar, Pushpendra; Singh, Nirupama; Satsangi, Vibha R.; Shrivastav, Rohit; Dass, Sahab

doi:10.1016/j.ijhydene.2012.10.028

Cited by 202 publications

(117 citation statements)

References 79 publications

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“…In this method, light striking the surface of semiconductor material generates electricity and is utilized for electrolysis of water to produce hydrogen and oxygen 10 . So this method provides a direct pathway to produce hydrogen by using sunlight and eliminates the need to generate the electricity from solar energy and subsequently feeding into an electrolyser as is in the case of photovoltaicelectrolysis system.…”

Section: Solar Assisted Splitting Of Watermentioning

confidence: 99%

“…Basically small band gap material is used to sensitize the high band gap material via electron or hole injection by visible light absorption. If energy band edges match at the junction better and efficient separation of electron-hole is possible they offer considerably high photocatalytic activity on account of photogenerated electrons and holes van readily reaches the interlayer spaces of the reaction sites 10 . When two materials are combined, an internal electrical field is generated and reduced the electron -hole recombination.…”

Section: Heterostructuresmentioning

confidence: 99%

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Photoelectrochemical splitting of water to produce a power appetizer Hydrogen: A green system for future –( A short review)

Kumar¹,

Sharma²,

Singh³

et al. 2016

Orient. J. Chem

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To meet the future energy demand, Hydrogen has been accepted as a fuel for future. Out of several renewable methods to produce hydrogen, solar assisted splitting of water (Photoelectrochemical splitting of water) is emerging as a most desired method to produce hydrogen which is a advancement of Photovoltaic process. However, the efficiency of PEC cell is a matter of concern. Various strategies have been adopted by different researchers to increase the efficiency of the system especially using nanotechnology as a tool. In this article, attempts have been made to summarise different approaches applied to obtain effective and viable photoelectrochemical system for splitting water to obtain hydrogen an energy carrier.

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Section: Solar Assisted Splitting Of Watermentioning

confidence: 99%

Section: Heterostructuresmentioning

confidence: 99%

Photoelectrochemical splitting of water to produce a power appetizer Hydrogen: A green system for future –( A short review)

Kumar¹,

Sharma²,

Singh³

et al. 2016

Orient. J. Chem

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“…9 Many reviews have been published based on significant progress in PEC water splitting over the past several decades. 2,4,[8][9][10][11][12][13][14][15][16][17][18] In this paper, we will focus on recent research efforts for efficient metal oxide PEC photoanodes through various strategies with emphasis on our own studies. Advances on metal oxide-based photoanodes composed of all inorganic materials are reviewed, excluding organic materials as decorations of metal oxides for enhanced efficiencies, such as dye-sensitization, molecular catalyst, or enzyme.…”

confidence: 99%

Research Update: Strategies for efficient photoelectrochemical water splitting using metal oxide photoanodes

Cho¹,

Jang²,

Lee³

et al. 2014

APL Materials

127

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Photoelectrochemical (PEC) water splitting to hydrogen is an attractive method for capturing and storing the solar energy in the form of chemical energy. Metal oxides are promising photoanode materials due to their low-cost synthetic routes and higher stability than other semiconductors. In this paper, we provide an overview of recent efforts to improve PEC efficiencies via applying a variety of fabrication strategies to metal oxide photoanodes including (i) size and morphology-control, (ii) metal oxide heterostructuring, (iii) dopant incorporation, (iv) attachments of quantum dots as sensitizer, (v) attachments of plasmonic metal nanoparticles, and (vi) co-catalyst coupling. Each strategy highlights the underlying principles and mechanisms for the performance enhancements.

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“…The efforts toward the optimization of the conditions for hydrogen evolution, however, have yielded limited success till date. The performance of the PEC cell depends centrally on the properties of the semiconductor photoelectrode, which need to satisfy following requirements: (i) band gap energy &2.2 eV for optimal absorption of solar radiations, (ii) conduction and valence bands straddling water oxidation and reduction potentials for spontaneous flow of photogenerated charge-carriers to the respective electrodes, (iii) stability and corrosion-resistance, and (iv) low cost [4,5]. At present, there is no semiconductor to fulfill all the above requirements and the hunt continues.…”

Section: Introductionmentioning

confidence: 99%

Surface deposition of Ag and Au nano-isles on ZnO thin films yields enhanced photoelectrochemical splitting of water

et al. 2015

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Nanostructured zinc oxide thin films, prepared by sol-gel, were subjected to surface loading of silver/gold nano-isles by controlled electrodeposition, using aqueous solutions (10 -2 M) of silver nitrate and chloroauric acid as precursor. The deposition potentials were, respectively, -400 and -200 mV for silver and gold depositions, as the deposition time varied from 5 to 60 s. Pristine samples (i.e., samples with no deposition of metal nano-isles) were also obtained for comparison. X-ray diffractometry indicated dominant evolution of wurtzite zinc oxide phase, with a possible diffusion of silver/gold into zinc oxide lattice. However, changes in the band gap energy were insignificant. Atomic force microscopic and scanning electron microscopic analyses revealed the surface topography and morphology. Energy-dispersive X-ray analysis confirmed the elemental stoichiometry and existence of silver and gold nanoparticles in films. Samples exhibited significant gain in photoelectrochemical water splitting current, which is largely attributable to the facilitative role played by silver/gold nano-isles in the separation and transport of photogenerated charge-carriers.

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Nanostructured bilayered thin films in photoelectrochemical water splitting – A review

Cited by 202 publications

References 79 publications

Photoelectrochemical splitting of water to produce a power appetizer Hydrogen: A green system for future –( A short review)

Photoelectrochemical splitting of water to produce a power appetizer Hydrogen: A green system for future –( A short review)

Research Update: Strategies for efficient photoelectrochemical water splitting using metal oxide photoanodes

Surface deposition of Ag and Au nano-isles on ZnO thin films yields enhanced photoelectrochemical splitting of water

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