Using a CeO2 quantum dot hole extraction-layer for enhanced solar water splitting activity of BiVO4 photoanodes

Seo, Dong Hyun; Hong, Seo Yeong; You, Tak Hyun; Sivanantham, Arumugam; Cho, In Sun

doi:10.1016/j.cej.2022.137917

Cited by 36 publications

(13 citation statements)

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“…[54] Nevertheless, cocatalysts are commonly spin coated or hydrothermally grown directly on photoanode surfaces. [55][56][57] By loading CoO x on BiVO 4 via simple spin coating, the photocurrent of the CoO x /BiVO 4 photoanode reached 2.73 mA cm −2 at 1.23 V RHE . [58] Alternatively, the direct spin coating of the FeOOH cocatalyst on Ti:BiVO 4 can also optimize the PEC performance.…”

Section: Contact Qualitymentioning

confidence: 99%

Cocatalysts‐Photoanode Interface in Photoelectrochemical Water Splitting: Understanding and Insights

Chen,

Meng,

et al. 2023

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Sluggish oxygen evolution reactions on photoanode surfaces severely limit the application of photoelectrochemical (PEC) water splitting. The loading of cocatalysts on photoanodes has been recognized as the simplest and most efficient optimization scheme, which can reduce the surface barrier, provide more active sites, and accelerate the surface catalytic reaction kinetics. Nevertheless, the introduction of cocatalysts inevitably generates interfaces between photoanodes and oxygen evolution cocatalysts (Ph/OEC), which causes severe interfacial recombination and hinders the carrier transfer. Recently, many researchers have focused on cocatalyst engineering, while few have investigated the effect of the Ph/OEC interface. Hence, to maximize the advantages of cocatalysts, interfacial problems for designing efficient cocatalysts are systematically introduced. In this review, the interrelationship between the Ph/OEC and PEC performance is classified and some methods for characterizing Ph/OEC interfaces are investigated. Additionally, common interfacial optimization strategies are summarized. This review details cocatalyst‐design‐based interfacial problems, provides ideas for designing efficient cocatalysts, and offers references for solving interfacial problems.

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Section: Contact Qualitymentioning

confidence: 99%

Cocatalysts‐Photoanode Interface in Photoelectrochemical Water Splitting: Understanding and Insights

Chen,

Meng,

et al. 2023

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“…Recently, Chinnan and co-workers prepared BiVO 4 /CuO p-n junction via the electrodeposition method, as shown in Figure 4(bf). [17] The formation of electric field at the interface between BiVO 4 and CuO offered well-separated electron-hole pairs, and lifetime of charge carriers was improved. The BiVO 4 / CuO electrode showed a transient decay time of 4.45 s, which was ~1.6-fold higher than the BiVO 4 electrode (2.81 s).…”

Section: Pà N Heterojunctionmentioning

confidence: 99%

BiVO₄ Heterojunctions as Efficient Photoanodes for Photoelectrochemical Water Oxidation

Wang

Zhang

et al. 2023

ChemPhotoChem

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Photoelectrochemical (PEC) water splitting has attracted strong interest as sustainable technology by converting solar energy into hydrogen. The semiconductor photoelectrodes play an important role to crease the solar‐to‐hydrogen conversion efficiency. Bismuth vanadate (BiVO4) is an excellent candidate as a photoanode material for PEC water oxidation because of its visible light absorption, suitable band edge location, high stability and low cost. However, single BiVO4 may undergo short carrier diffusion length, rapid recombination of photoinduced charge carriers and photocorrosion. Heterojunction strategy established by two or more materials has provided an outstanding scheme to mitigate these inadequacies. This review focuses on recent important works with respect to BiVO4 heterojunction photoanodes for PEC water oxidation reactions, including interface junction and surface functional junction. In the end, the challenges and prospects for future research on BiVO4 heterojunction photoanodes in solar‐to‐hydrogen application field are proposed.

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“…Furthermore, cost-effective production can be achieved by developing materials that are abundant, easy to prepare, and highly stable. , Among visible light photocatalysts, monoclinic bismuth vanadate (m-BiVO 4 ) is considered as one of the most attractive options. BiVO 4 , as a photocatalytic material, possesses several advantages. − It is composed of abundant elements found on Earth, enabling its inexpensive synthesis. Its relatively narrow bandgap (2.4 eV) promotes enhanced absorption of visible light.…”

Section: Introductionmentioning

confidence: 99%

“…The formation of the MW:BVO/CeO 2 system can also increase the surface area and reduce the grain size. Additionally, CeO 2 demonstrates remarkable redox performance, abundant surface oxygen defects, and structural stability, thereby showcasing exceptional catalytic performance. , As is well-known, CeO 2 is known for its abundance of oxygen vacancies (O vs ), which are advantageous for the formation of Frustrated Lewis Pairs (FLPs). ,, Furthermore, the Lewis acidity and basicity present in the CeO 2 matrix hold great potential for promoting the activity and hydrogenation of NO. − Therefore, the construction of a MW:BVO/CeO 2 heterostructure can effectively suppress carrier recombination and modulate the reaction kinetics of the photocathode. , …”

Section: Introductionmentioning

confidence: 99%

Synergistic High-Efficiency Photoelectrochemical Water Splitting via Type-II Heterojunction MW:BVO/CeO₂ Coupled with Ultrathin NiFeOOH

Ding,

Wang,

Chu

et al. 2024

ACS Appl. Energy Mater.

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In order to solve the problem of slow water oxidation kinetics and charge complexation of the BiVO 4 photoanode, CeO 2 octahedral nanomaterials doped with different amounts of NaH 2 PO 4 (COP3) were synthesized by a hydrothermal method in one step. CeO 2based materials have been widely studied in the fields of organic catalysis, photocatalysis to decompose water, and photodegradation of organic pollutants, showing excellent photocatalytic properties. The heterostructure formed by MW:BVO and COP3 (doped with 0.002 g of NaH 2 PO 4 ) expands the light absorption range and accelerates the separation of the internal carriers. In order to further improve the photocatalytic performance, the MW:BVO/COP3@NiFeOOH (immersion time of 1 h and pH = 8, respectively) composite was prepared by introducing NiFeOOH. As a metal oxide coating additive, NiFeOOH can rapidly capture holes and effectively use these holes for water oxidation on the photoelectrode surface through a cyclic catalytic process. In addition, MW:BVO/COP3@NiFeOOH nanocomposites can effectively increase the active surface area and accelerate the interfacial charge transfer. The final prepared MW:BVO/COP3@NiFeOOH nanocomposites showed excellent photocurrent density (4.8 mA cm −2 at 1.23 V vs RHE) in LSV tests due to the efficient separation and transfer of photogenerated carriers. It can be seen that the interaction between MW:BVO, COP3, and NiFeOOH not only improves the performance of this new class of materials but also highlights the importance of COP3 as an important component worthy of further study.

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Using a CeO2 quantum dot hole extraction-layer for enhanced solar water splitting activity of BiVO4 photoanodes

Cited by 36 publications

References 54 publications

Cocatalysts‐Photoanode Interface in Photoelectrochemical Water Splitting: Understanding and Insights

Cocatalysts‐Photoanode Interface in Photoelectrochemical Water Splitting: Understanding and Insights

BiVO₄ Heterojunctions as Efficient Photoanodes for Photoelectrochemical Water Oxidation

Synergistic High-Efficiency Photoelectrochemical Water Splitting via Type-II Heterojunction MW:BVO/CeO₂ Coupled with Ultrathin NiFeOOH

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Using a CeO2 quantum dot hole extraction-layer for enhanced solar water splitting activity of BiVO4 photoanodes

Cited by 36 publications

References 54 publications

Cocatalysts‐Photoanode Interface in Photoelectrochemical Water Splitting: Understanding and Insights

Cocatalysts‐Photoanode Interface in Photoelectrochemical Water Splitting: Understanding and Insights

BiVO4 Heterojunctions as Efficient Photoanodes for Photoelectrochemical Water Oxidation

Synergistic High-Efficiency Photoelectrochemical Water Splitting via Type-II Heterojunction MW:BVO/CeO2 Coupled with Ultrathin NiFeOOH

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Product

Resources

About

BiVO₄ Heterojunctions as Efficient Photoanodes for Photoelectrochemical Water Oxidation

Synergistic High-Efficiency Photoelectrochemical Water Splitting via Type-II Heterojunction MW:BVO/CeO₂ Coupled with Ultrathin NiFeOOH