Compositional engineering of solution-processed BiVO4 photoanodes toward highly efficient photoelectrochemical water oxidation

Byun, Segi; Jung, Gihun; Moon, Sangwoo; Kim, Bumsoo; Park, Jeong Young; Jeon, Seungwon; Nam, Sung-Wook; Shin, Byungha

doi:10.1016/j.nanoen.2017.11.034

Cited by 60 publications

(51 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These limitations can be partly addressed by constructing an electrochemical cell (i.e., a PEC cell) with physically separated but electrically connected half cells . For bias‐free water‐splitting PEC cells, any combination of n‐ and p‐type semiconductors can be utilized as a photoanode (e.g., Fe 2 O 3 ,, BiVO 4 ,, WO 3 , etc.) and a photocathode (e.g., Si,, Cu 2 O,, CuBi 2 O 4 ,, etc.…”

Section: Research Backgroundmentioning

confidence: 99%

Tailored Assembly of Molecular Water Oxidation Catalysts on Photoelectrodes for Artificial Photosynthesis

et al. 2019

View full text Add to dashboard Cite

Solar‐to‐chemical energy conversion, or so‐called artificial photosynthesis, is a promising technology enabling sustainable production and use of various chemical compounds such as H2, CO, CH4, HCOOH, CH3OH, and NH3. For practical applications, it is necessary to improve the interfacial properties of light‐harvesting semiconductors through modification with proper electrocatalysts, by trying to overcome their intrinsic limitations such as rapid recombination, sluggish reaction kinetics, and photocorrosion. Compared to their heterogeneous counterparts, molecular electrocatalysts have a higher catalytic activity and more flexibility in their design/synthesis and integration with semiconducting materials. In this article, we review recent efforts on the tailored assembly of molecular electrocatalysts to address the above issues for artificial photosynthesis, especially those for oxygen evolution reactions on semiconductor photoelectrodes for photoelectrochemical water oxidation. One can expect that the strategies and methods developed for the tailored assembly and integration of molecular electrocatalysts on water oxidation photoanodes can provide insights for the design and fabrication of various forms of photosynthetic devices due to the similarity between their underlying principles.

show abstract

Section: Research Backgroundmentioning

confidence: 99%

Tailored Assembly of Molecular Water Oxidation Catalysts on Photoelectrodes for Artificial Photosynthesis

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Bismuth vanadate (BiVO 4 , referred to as BVO) is an attractive candidate for photo‐catalytic or photoelectrochemical (PEC) water splitting applications due to its high chemical stability, suitable band edge position for an oxygen evolution reaction (OER), and maximum theoretical solar‐to‐hydrogen efficiency close to 10% . For their simplicity, various solution‐based methods have been used to produce a BVO layer: metal–organic decomposition (MOD), chemical bath deposition, electrodeposition and hydrothermal deposition, etc.…”

Section: Introductionmentioning

confidence: 99%

“…For their simplicity, various solution‐based methods have been used to produce a BVO layer: metal–organic decomposition (MOD), chemical bath deposition, electrodeposition and hydrothermal deposition, etc. [1f,2]…”

Section: Introductionmentioning

confidence: 99%

“…In the MOD process, bismuth nitrate (Bi(NO 3 ) 3 ) and vanadyl acetylacetonate (VO(acac) 2 ) are the most widely used metal–organic precursors, and acetic acid and acetylacetone are common solvents for the Bi‐ and V‐precursor, respectively. [1e,2c,3] However, the MOD process often has a reproducibility problem; the PEC performance of BVO prepared by MOD fluctuates when nominally identical process conditions are employed. [2b,c,4] The origin of this issue has not been completely understood.…”

Section: Introductionmentioning

confidence: 99%

“…The solubility of VO(acac) 2 , the most common V‐precursor, in acetylacetone is low, ≈0.03 m , thus limiting the thickness of BVO achievable by a single coating to 10–20 nm. [1a,e,2b] For sufficient light absorption, at least ≈200 nm of BVO is ideal, and that requires multiple coatings. [1a,e,2b,5] A process with repeated spin‐coating and postannealing may result in unintended modification of a growing BVO film.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Aging of a Vanadium Precursor Solution: Influencing Material Properties and Photoelectrochemical Water Oxidation Performance of Solution‐Processed BiVO₄ Photoanodes

Byun

Jung

Shi

et al. 2019

Adv Funct Materials

Self Cite

View full text Add to dashboard Cite

Metal-organic decomposition is an easy way to fabricate BiVO 4 (BVO) photoanodes; however, it often experiences a reproducibility issue. Here, the aging duration of a vanadium precursor solution, vanadyl acetylacetonate in methanol, is identified as a factor that profoundly affects reproducibility. Substantial changes in structural, optical, and electrical properties of BVO films are observed upon varying aging time of vanadium precursor solutions, which subsequently impacts photoelectrochemical (PEC) water oxidation and sulfite oxidation reactions. With the optimum number of aging days (3 d), some deficiency of oxygen is observed, which is accompanied by an increase in carrier concentration and a reduced charge transfer resistance in the PEC device, which produces the highest PEC performance that is comparable to the state-of-the-art undoped BVO photoanodes. The findings point to the importance of understanding solution chemistry and demonstrate that utilization of the understanding of fine adjustment of the composition of BVO films can produce highly reproducible and efficient BiVO 4 photoanodes.

show abstract

Activating a Semiconductor–Liquid Junction via Laser‐Derived Dual Interfacial Layers for Boosted Photoelectrochemical Water Splitting

Jian

Wang

et al. 2022

Advanced Materials

View full text Add to dashboard Cite

The semiconductor–liquid junction (SCLJ), the dominant place in photoelectrochemical (PEC) catalysis, determines the interfacial activity and stability of photoelectrodes, whcih directly affects the viability of PEC hydrogen generation. Though efforts dedicated in past decades, a challenge remains regarding creating a synchronously active and stable SCLJ, owing to the technical hurdles of simultaneously overlaying the two advantages. The present work demonstrates that creating an SCLJ with a unique configuration of the dual interfacial layers can yield BiVO4 photoanodes with synchronously boosted photoelectrochemical activity and operational stability, with values located at the top in the records of such photoelectrodes. The bespoke dual interfacial layers, accessed via grafting laser‐generated carbon dots with phenolic hydroxyl groups (LGCDs‐PHGs), are experimentally verified effective, not only in generating the uniform layer of LGCDs with covalent anchoring for inhibited photocorrosion, but also in activating, respectively, the charge separation and transfer in each layer for boosted charge‐carrier kinetics, resulting in FeNiOOH–LGCDs‐PHGs–MBVO photoanodes with a dual configuration with the photocurrent density of 6.08 mA cm−2 @ 1.23 VRHE, and operational stability up to 120 h @ 1.23 VRHE. Further work exploring LGCDs‐PHGs from catecholic molecules warrants the proposed strategy as being a universal alternative for addressing the interfacial charge‐carrier kinetics and operational stability of semiconductor photoelectrodes.

show abstract

Compositional engineering of solution-processed BiVO4 photoanodes toward highly efficient photoelectrochemical water oxidation

Cited by 60 publications

References 49 publications

Tailored Assembly of Molecular Water Oxidation Catalysts on Photoelectrodes for Artificial Photosynthesis

Tailored Assembly of Molecular Water Oxidation Catalysts on Photoelectrodes for Artificial Photosynthesis

Aging of a Vanadium Precursor Solution: Influencing Material Properties and Photoelectrochemical Water Oxidation Performance of Solution‐Processed BiVO₄ Photoanodes

Activating a Semiconductor–Liquid Junction via Laser‐Derived Dual Interfacial Layers for Boosted Photoelectrochemical Water Splitting

Contact Info

Product

Resources

About

Compositional engineering of solution-processed BiVO4 photoanodes toward highly efficient photoelectrochemical water oxidation

Cited by 60 publications

References 49 publications

Tailored Assembly of Molecular Water Oxidation Catalysts on Photoelectrodes for Artificial Photosynthesis

Tailored Assembly of Molecular Water Oxidation Catalysts on Photoelectrodes for Artificial Photosynthesis

Aging of a Vanadium Precursor Solution: Influencing Material Properties and Photoelectrochemical Water Oxidation Performance of Solution‐Processed BiVO4 Photoanodes

Activating a Semiconductor–Liquid Junction via Laser‐Derived Dual Interfacial Layers for Boosted Photoelectrochemical Water Splitting

Contact Info

Product

Resources

About

Aging of a Vanadium Precursor Solution: Influencing Material Properties and Photoelectrochemical Water Oxidation Performance of Solution‐Processed BiVO₄ Photoanodes