Large area high-performance bismuth vanadate photoanode for efficient solar water splitting

Huang, Mei‐Rong; Lei, Wenhai; Wang, Min; Zhao, Shuji; Li, Changli; Wang, Moran; Zhu, Hongwei

doi:10.1039/c9ta13715g

Cited by 35 publications

(33 citation statements)

References 27 publications

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“…In the photoelectrochemical (PEC) electrolysis cell [98,99], the photoanode absorbs the solar energy to generate the photovoltage to effectively drive water splitting, which can effectively decrease the external energy consumption [100][101][102]. To minimized utilization of the external energy consumption and realize unassisted overall light-induced water splitting, a possible way is using a tandem structure to generate a total photovoltage through complementary light absorption between different semiconductor electrodes [103][104][105][106][107][108][109][110][111][112][113]. Mathews et al constructed that a Fe 2 O 3 photoanode in tandem with an organic-inorganic CH 3 NH 3 PbI 3 perovskite solar cell (PSC) ( Fig.…”

Section: Water Splitting Driven By a Photoelectrode Devicementioning

confidence: 99%

Water Splitting: From Electrode to Green Energy System

et al. 2020

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HIGHLIGHTS • Bifunctional electrode and electrolytic cell configuration for electrochemical water splitting are reviewed. • The different green energy systems powered water splitting are summarized and discussed. • An outlook of future research prospects for the development of green energy system powered water splitting in practical application process is proposed. ABSTRACT Hydrogen (H 2) production is a latent feasibility of renewable clean energy. The industrial H 2 production is obtained from reforming of natural gas, which consumes a large amount of nonrenewable energy and simultaneously produces greenhouse gas carbon dioxide. Electrochemical water splitting is a promising approach for the H 2 production, which is sustainable and pollution-free. Therefore, developing efficient and economic technologies for electrochemical water splitting has been an important goal for researchers around the world. The utilization of green energy systems to reduce overall energy consumption is more important for H 2 production. Harvesting and converting energy from the environment by different green energy systems for water splitting can efficiently decrease the external power consumption. A variety of green energy systems for efficient producing H 2 , such as two-electrode electrolysis of water, water splitting driven by photoelectrode devices, solar cells, thermoelectric devices, triboelectric nanogenerator, pyroelectric device or electrochemical water-gas shift device, have been developed recently. In this review, some notable progress made in the different green energy cells for water splitting is discussed in detail. We hoped this review can guide people to pay more attention to the development of green energy system to generate pollution-free H 2 energy, which will realize the whole process of H 2 production with low cost, pollution-free and energy sustainability conversion.

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Section: Water Splitting Driven By a Photoelectrode Devicementioning

confidence: 99%

Water Splitting: From Electrode to Green Energy System

et al. 2020

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“…Similarly, this material is still facing the problems of low charge carrier rate and short hole diffusion length, which influences the PEC activity and stability. [ 10–15 ] To cope with these issues, deposition cocatalyst can efficiently improve the surface charge carrier transport on BiVO 4 . [ 16–21 ] The cocatalyst layer should be uniform and thin enough to fast transfer holes through cocatalyst for oxygen evolution reaction.…”

Section: Introductionmentioning

confidence: 99%

Pt‐Induced Defects Curing on BiVO₄ Photoanodes for Near‐Threshold Charge Separation

Gao

Liu

Guo

et al. 2021

Advanced Energy Materials

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Photostability is one of the most essential properties for evaluating photoelectrochemical (PEC) water splitting performance on semiconductors. Herein, the oxygen‐deficiency conditions are applied to tune and activate BiVO4 photoanodes with a class of oxygen vacancies across the whole bulk material, and regulate the electronic occupancy of these states upon the charge carrier processes that determine PEC water oxidation activity. Through the experimental results and nonadiabatic molecular dynamics with time‐domain density functional theory calculations, the charge carrier lifetime can be influenced by the oxygen vacancies concentration on BiVO4, and the semiconductor can be flexibly photoactivated under oxygen‐sufficient and deficient atmospheres for enhancing the charge carrier density and photovoltage. The PEC performance of BiVO4 is further boosted by Pt doping, which exhibits a record photocurrent density of 5.45 mA cm–2 at 1.23 VRHE with solar conversion efficiency of 2.1% at 0.65 VRHE. The Pt can prevent the unnecessory charge recombination on the defected BiVO4, which also enhances the majority charge carrier density, resulting in one of the best charge separation efficiencies, close to 100%, among the steady‐state PEC performance for BiVO4. More importantly, the resulting Pt:BiVO4 presents long‐term stability over 50 h at 0.8 VRHE.

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“…The peak velocities do not depend on the inlet liquid velocity, which implies that the bubble-induced convection is predominant under the present benchmark condition (i.e., 10 mA/cm 2 ,  bubble = 0.5). We note that the lack of dependency of the velocity of gas bubbles on the inlet velocity and the fact that Re p remains below unity suggest that the relative velocities between the gas and the liquid phase at regions close to the electrode (< 1 mm) are close to the Stoke's terminal velocity, v t , shown in eqn (10).…”

Section: Please Do Not Adjust Marginsmentioning

confidence: 86%

“…The concentration overpotentials become more significant in large-scale devices due to the buildup of pH gradient not only in the direction away from the electrode but also along the electrode. [7][8][9][10][11] Therefore, understanding the mass-transport of dissolved ions is crucial to achieve efficient solar water splitting in neutral pH conditions.…”

Section: Introductionmentioning

confidence: 99%

Bubble-induced convection stabilizes the local pH during solar water splitting in neutral pH electrolytes

Obata

Abdi

2021

Sustainable Energy Fuels

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Large area high-performance bismuth vanadate photoanode for efficient solar water splitting

Abstract: Large-scale BiVO4 photoanodes were prepared for solar water splitting. A photocurrent density of water oxidation of ∼2.23 mA cm−2 at 1.23 VRHE and ∼0.83% conversion efficiency at 0.65 VRHE were achieved, with <4% decay after 5 h of operation under harsh conditions.

Cited by 35 publications

References 27 publications

Water Splitting: From Electrode to Green Energy System

Water Splitting: From Electrode to Green Energy System

Pt‐Induced Defects Curing on BiVO₄ Photoanodes for Near‐Threshold Charge Separation

Bubble-induced convection stabilizes the local pH during solar water splitting in neutral pH electrolytes

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Large area high-performance bismuth vanadate photoanode for efficient solar water splitting

Abstract: Large-scale BiVO4 photoanodes were prepared for solar water splitting. A photocurrent density of water oxidation of ∼2.23 mA cm−2 at 1.23 VRHE and ∼0.83% conversion efficiency at 0.65 VRHE were achieved, with <4% decay after 5 h of operation under harsh conditions.

Cited by 35 publications

References 27 publications

Water Splitting: From Electrode to Green Energy System

Water Splitting: From Electrode to Green Energy System

Pt‐Induced Defects Curing on BiVO4 Photoanodes for Near‐Threshold Charge Separation

Bubble-induced convection stabilizes the local pH during solar water splitting in neutral pH electrolytes

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Product

Resources

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Pt‐Induced Defects Curing on BiVO₄ Photoanodes for Near‐Threshold Charge Separation