Rational Design of 3D Hierarchical Ternary SnO2/TiO2/BiVO4 Arrays Photoanode toward Efficient Photoelectrochemical Performance

Pan, Qin; Li, Aoshuang; Zhang, Yuanlu; Yang, Yaping; Cheng, Chuanwei

doi:10.1002/advs.201902235

Cited by 88 publications

(53 citation statements)

References 64 publications

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“…High-efficient light-harvesting and carrier transport performance could be achieved by the ternary SnO 2 /TiO 2 /BiVO 4 photoanode. [99] Resulting from the multiple light scattering processes within TiO 2 nanocages, the incident light traveling lengths can also be extended. Therefore, compared with P25 powder, better PEC performance was achieved by the hollow-structured TiO 2 nanocages (Figure 6b).…”

Section: Influence On Incident Light-photoanode Interactionmentioning

confidence: 99%

Engineering Nanostructure–Interface of Photoanode Materials Toward Photoelectrochemical Water Oxidation

et al. 2021

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In practical applications, solar energy is usually converted to other forms of energy, such as electric energy, [9][10][11] chemical energy, [12,13] thermal energy, [14,15] so as to facilitate further transportation and storage. Among them, photoelectrochemical (PEC) reactions from water to hydrogen, CO 2 to C2+ products, and N 2 to NH 3 in the aqueous-based environment have been considered to be quite promising solar-chemical energy conversion pathways. [16][17][18][19] Unlike the traditional water electrolyzing system, the most ideal PEC reaction system can be selfdriven by illumination without external bias. Utilizing the electron-hole carriers generated from the semiconductor photoelectrode, redox reactions take place separately on the photocathode and photoanode. However, as the water oxidation reaction involves a complex four-proton coupled multi-electron process (2H 2 O + 4h + → O 2 + 4H + , E o = 1.23 V vs reversible hydrogen electrode (RHE)), it makes the water oxidation reaction the rate-control step in the watersplitting reaction. [20] Therefore, developing high-performance photo anodes is of great fundamental importance and interest.At the present stage, TiO 2 is the most studied and applied semiconductor photoelectrocatalyst, due to its outstanding chemical stability. [21][22][23] However, as a wide bandgap semiconductor (anatase TiO 2 : 3.2eV, rutile TiO 2 : 3.0 eV), TiO 2 can only respond to the ultraviolet light. Meanwhile, as an intrinsic semiconductor, the bulk/surficial carrier recombination of TiO 2 greatly hinders its practical application. [24][25][26][27] In that case, some narrow bandgap semiconductors are also applied as the photoanode materials, such as Ta 3 N 5 (bandgap 2.1 eV), [28,29] BiVO 4 (bandgap 2.4 eV), and α-Fe 2 O 3 (bandgap 2.1 eV). [30][31][32] However, many of these narrow bandgap materials suffer from poor chemical stability and sluggish interfacial charge injection. [33][34][35] As intrinsic semiconductor materials, both wide and narrow bandgap semiconductor photoanode materials are suffering from the poor bulk-phase carrier separation, intense surficial e − /h + trapping recombination, and sluggish electrode/electrolyte carrier injection kinetics. [36][37][38][39] Fortunately, with the continuous investment of researchers, a series of modification methods have been established and the PEC water oxidation performance of semiconductor photoanode materials has been significantly improved. [32,[40][41][42][43][44] Among various strategies, nanostructure-interface engineering is widely regarded as an effective method to improve the PEC water oxidation performance: [40,41] the light-harvesting performance can be enhanced by the widened optical Photoelectrochemical (PEC) water oxidation based on semiconductor materials plays an important role in the production of clean fuel and value-added chemicals. Nanostructure-interface engineering has proven to be an effective way to construct highly efficient PEC water oxidation photoanodes with good light capture, carrier transport, and ...

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Section: Influence On Incident Light-photoanode Interactionmentioning

confidence: 99%

Engineering Nanostructure–Interface of Photoanode Materials Toward Photoelectrochemical Water Oxidation

et al. 2021

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“…The production of substitute fossil fuels by artificial photosynthesis is an effective strategy for achieving long-term energy storage one of the most effective methods to promote bulk and surface charge separation. [15][16][17][18] As demonstrated by the nonfullerene PBDB-T:ITIC photocathode, the perfect heterostructure (FTO/ CuO x /PBDB-T:ITIC/TiO x /Pt) by introducing CuO x hole transport layer (HTL) and TiO x electron transport layer (ETL) greatly suppresses charge recombination, and achieves the highest applied bias photon-to-current efficiency (ABPE) of 4.1% among the organic photocathodes. [19] Similarly, the BiVO 4 heterostructure photoanode by applying SnO 2 as ETL reaches the excellent stability and ABPE of 2.7%, which is one of the highest PEC performance among reported BiVO 4 -based photoanodes.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient InGaN Nanorods Photoelectrode by Constructing Z‐scheme Charge Transfer System for Unbiased Water Splitting

Lin

Zhang

Chai

et al. 2020

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Unbiased photoelectrochemical water splitting for the promising InGaN nanorods photoelectrode is highly desirable, but it is practically hindered by the serious recombination of charge carrier in bulk and surface of InGaN nanorods. Herein, an unbiased Z‐scheme InGaN nanorods/Cu2O nanoparticles heterostructured system with boosted interfacial charge transfer is constructed for the first time. The introduced Cu2O nanoparticles pose double‐sided effect on photoelectrochemical (PEC) performance of InGaN nanorods, which enables a robust hybrid structure and induces weakened light absorption capability simultaneously. As a result, the optimized InGaN/Cu2O‐1.5C photoelectrode with the uniform morphology exhibits an enhanced photocurrent density of ≈170 µA cm−2 at 0 V versus Pt, with 8.5‐fold enhancement compared with pure InGaN nanorods. Comprehensive investigations into experimental results and theoretical calculations reveal that the electrons accumulation and holes depletion of Cu2O facilitate to form a typical Z‐scheme band alignment, thus providing a large photovoltage to drive unbiased water splitting and enhancing the stability of Cu2O. This work provides a novel and facile strategy to achieve InGaN nanorods and other catalyst‐based PEC water splitting without external bias, and to relieve the bottlenecks of charge transfer dynamics at the electrode bulk and electrode/electrolyte interface by constructing Z‐scheme heterostructure.

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“…By combining different work-function semiconductors together, the formed in-built electric field at the heterojunction interface will effectively promote charge separation, thus leading to enhanced PEC performance. [120][121][122] The integration of efficient photocatalyst (InGaN NWs) and abundant semiconductor (Si) shows a promise for practical PEC water splitting. [109,123,124] Nowadays, InGaN NWs are generally epitaxially grown on Si substrate for solar water splitting.…”

Section: (9 Of 20)mentioning

confidence: 99%

Modulating Surface/Interface Structure of Emerging InGaN Nanowires for Efficient Photoelectrochemical Water Splitting

Lin

Wang

2020

Adv Funct Materials

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Photoelectrochemical (PEC) water splitting provides a promising approach to convert solar energy into hydrogen. Developing active, stable, and cost-effective semiconductors photoelectrodes is of great significance for achieving high-efficiency and large-scale hydrogen production. InGaN nanowires as an important candidate have gained a great upsurge in solar water splitting due to its tunable gap, high electron mobility, large active area, and excellent chemical stability. To obtain state-of-the-art InGaN nanowires-based photoelectrodes, tremendous efforts have been devoted to enhance light absorption capacity, charge carrier dynamics, and redox activity. In this review, recent advances in InGaN nanowires as photoelectrodes for PEC water splitting are comprehensively presented, with a focus on photoelectrode optimization strategies from the aspects of surface and interface structure modulation including doping engineering, energy band engineering, heterostructure engineering, and micro-nano engineering. The representative applications of InGaN nanowires-based PEC tandem cell are also discussed. Finally, perspectives on remaining challenges and future development are outlined.

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Rational Design of 3D Hierarchical Ternary SnO₂/TiO₂/BiVO₄ Arrays Photoanode toward Efficient Photoelectrochemical Performance

Cited by 88 publications

References 64 publications

Engineering Nanostructure–Interface of Photoanode Materials Toward Photoelectrochemical Water Oxidation

Engineering Nanostructure–Interface of Photoanode Materials Toward Photoelectrochemical Water Oxidation

Highly Efficient InGaN Nanorods Photoelectrode by Constructing Z‐scheme Charge Transfer System for Unbiased Water Splitting

Modulating Surface/Interface Structure of Emerging InGaN Nanowires for Efficient Photoelectrochemical Water Splitting

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