Orderly decoupled dynamics modulation in nanoporous BiVO4 photoanodes for solar water splitting

Yang, Xiaotian; Jiang, Peichen; Qian, Yu; Jiang, Hao; Xu, Xiaoyong

doi:10.1016/j.jallcom.2022.167428

Cited by 11 publications

(3 citation statements)

References 43 publications

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“…Interestingly, the band gap property of BiVO 4 does not modify with the thickness of the film, which therefore indicates the important role of the charge carrier dynamics in the recombination process resulting in a higher catalytic efficiency. 32 Bulk recombination can be reduced by modification of the crystal structure manipulation via doping, preferential growth of certain crystal facets, morphology optimization, etc., while the interfacial charge carrier recombination at the electrode/ electrolyte interface can be managed via surface modifications, cocatalyst loading, and various postsynthetic treatments. Brief notes of the processes with a focus on the preferential generation of crystal planes and modification of the surfaces are discussed in the following sections.…”

Section: Discussion On the Enhancement Of Performancementioning

confidence: 99%

“…The charge separation efficiency in BiVO 4 is reported to be better at a film thickness of about 458 nm; a separation efficiency of about 96% has been reported. Interestingly, the band gap property of BiVO 4 does not modify with the thickness of the film, which therefore indicates the important role of the charge carrier dynamics in the recombination process resulting in a higher catalytic efficiency . Bulk recombination can be reduced by modification of the crystal structure manipulation via doping, preferential growth of certain crystal facets, morphology optimization, etc., while the interfacial charge carrier recombination at the electrode/electrolyte interface can be managed via surface modifications, cocatalyst loading, and various postsynthetic treatments.…”

Section: Discussion On the Enhancement Of Performancementioning

confidence: 99%

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Enhancing the PEC Efficiency in the Perspective of Crystal Facet Engineering and Modulation of Surfaces

Manna,

Satpati,

Patra

et al. 2024

ACS Omega

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Generation of hydrogen is one of the most promising routes to harvest solar energy for its sustainable utilization. Among different routes, the photoelectrochemical (PEC) process to split water using solar light to produce hydrogen is the green method to generate hydrogen. The sluggish kinetics through complicated pathways makes the oxygen evolution reaction the rate limiting step of the overall water splitting process. Therefore, development of an efficient photoanode for the sustainable oxidation of water is most challenging in an efficient overall PEC water splitting process. The low solar to hydrogen conversion efficiency arises from the slow surface kinetics, poor hole diffusion, and fast charge recombination processes. There have been strategies to improve catalytic performances through the removal of such detrimental effects. The generation of engineered surfaces is one of the important strategies recently adopted for the enhancement of the catalytic efficiencies. The present review has been focused on the discussion of engineered surfaces using crystal facet engineering, protective surface layer, passivation using the atomic layer deposition (ALD) technique, and cocatalyst modified surfaces to enhance the catalytic efficiency. Some of the important parameters defining catalyst performance are also discussed at the beginning of the review.

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Section: Discussion On the Enhancement Of Performancementioning

confidence: 99%

Section: Discussion On the Enhancement Of Performancementioning

confidence: 99%

Enhancing the PEC Efficiency in the Perspective of Crystal Facet Engineering and Modulation of Surfaces

Manna,

Satpati,

Patra

et al. 2024

ACS Omega

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show abstract

“…This contradiction remains a critical factor limiting apparent photocurrent density yield at BVO photoanodes. [ 8 , 37 ] Particularly in a porous film composed of nanoparticles (NPs), the large number of internal contact junctions severely impede electron transport especially as the thickness increases, although its large specific surface allows more OEC loading to support surface catalysis. The thickness of porous BVO NP film with optimum performance is generally only 300–400 nm, [ 6 , 38 ] which is far insufficient for optical absorption.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Charge Separation in Nanoporous BiVO4 by External Electron Transport Layer Boosts Solar Water Splitting

Yang,

Cui,

Lin

et al. 2023

Advanced Science

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The optimization of charge transport with electron‐hole separation directed toward specific redox reactions is a crucial mission for artificial photosynthesis. Bismuth vanadate (BiVO4, BVO) is a popular photoanode material for solar water splitting, but it faces tricky challenges in poor charge separation due to its modest charge transport properties. Here, a concept of the external electron transport layer (ETL) is first proposed and demonstrated its effectiveness in suppressing the charge recombination both in bulk and at surface. Specifically, a conformal carbon capsulation applied on BVO enables a remarkable increase in the charge separation efficiency, thanks to its critical roles in passivating surface charge‐trapping sites and building external conductance channels. Through decorated with an oxygen evolution catalyst to accelerate surface charge transfer, the carbon‐encased BVO (BVO@C) photoanode manifests durable water splitting over 120 h with a high current density of 5.9 mA cm−2 at 1.23 V versus the reversible hydrogen electrode (RHE) under 1 sun irradiation (100 mW cm−2, AM 1.5 G), which is an activity‐stability trade‐off record for single BVO light absorber. This work opens up a new avenue to steer charge separation via external ETL for solar fuel conversion.

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Coating effect of metal organic complex (Co-DTPMP) layer on enhancing PEC water oxidation performance of BiVO4 photoanode

Saad,

Sayed,

Mady

et al. 2024

Composites Part B: Engineering

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Orderly decoupled dynamics modulation in nanoporous BiVO4 photoanodes for solar water splitting

Cited by 11 publications

References 43 publications

Enhancing the PEC Efficiency in the Perspective of Crystal Facet Engineering and Modulation of Surfaces

Enhancing the PEC Efficiency in the Perspective of Crystal Facet Engineering and Modulation of Surfaces

Enhanced Charge Separation in Nanoporous BiVO4 by External Electron Transport Layer Boosts Solar Water Splitting

Coating effect of metal organic complex (Co-DTPMP) layer on enhancing PEC water oxidation performance of BiVO4 photoanode

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