Facile synthesis of Fe3+/Fe2+ self-doped nanoporous FeVO4 photoanodes for efficient solar water splitting

Wang, Wei; Zhang, Yajun; Wang, Lei; Bi, Yingpu

doi:10.1039/c6ta10308a

Cited by 50 publications

(46 citation statements)

References 28 publications

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“…Several groups have reported the fabrication of FeVO 4 thin films using magnetron cosputtering, spray pyrolysis, dropcasting, and sol-gel methods with reported bandgap energy of 2.0-2.1 eV. [21][22][23][24][25][26][27][28][29][30][31] However, the achieved photocurrents are still very low as compared with the theoretical photocurrent based on the bandgap energy. We have previously identified that the main problem causing the low performance of FeVO 4 films is the poor bulk carrier separation.…”

Section: Introductionmentioning

confidence: 99%

High Throughput Discovery of Effective Metal Doping in FeVO₄ for Photoelectrochemical Water Splitting

et al. 2020

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FeVO4 is a potential photoanode candidate with favorable bandgap energy for absorbing visible light in the solar spectrum. However, the achieved photocurrents are still much lower than the theoretical photocurrent due to poor bulk carrier separation efficiency. Herein, the aim is to improve FeVO4 charge transport properties by searching for suitable metal doping using combinatorial methods. Thin‐film FeVO4 libraries with different doping ratios of Zn, Ni, Cr, Mo, and W are fabricated on fluorine doped tin oxide substrates using combinatorial inkjet printing and their photoelectrochemical properties screened using photoscanning droplet cell. Mo and W doping show higher current density compared with undoped FeVO4; whereas the photocurrent decreases for Ni‐ and Zn‐doped samples. The best photocurrent is achieved with 7% doping ratio of Cr. Cr is discovered as a promising dopant for the first time, which is more effective than reported Mo or W for FeVO4 photoanode. The replacement of Cr3+ to Fe3+ in FeVO4 crystal lattice helps to mainly improve the catalytic activity for charge transfer, which results in the enhancement of photoresponse of the FeVO4 photoanode.

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Section: Introductionmentioning

confidence: 99%

High Throughput Discovery of Effective Metal Doping in FeVO₄ for Photoelectrochemical Water Splitting

et al. 2020

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“…The photocurrent density of the undoped material is, however, less than 0.1 mA cm -2 at 1.23 V vs. RHE (potential relative to reversible hydrogen electrode). 27 Efforts have been reported to improve the performance (e.g., doping with W, partial reduction of Fe 3+ /Fe 2+ ), 28,30 but the photocurrent enhancement has been marginal. The cause of such a small photocurrent is not clear, because many intrinsic properties, such as the exact band positions, carrier mobility, and carrier lifetime are still unknown.…”

Section: Introductionmentioning

confidence: 99%

Elucidation of the opto-electronic and photoelectrochemical properties of FeVO₄ photoanodes for solar water oxidation

Zhang

Friedrich

et al. 2018

J. Mater. Chem. A

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“…Thus, more attention should be paid to improve the photocurrent densities of a photoanode at lower potentials. In addition to WO 3 , α-Fe 2 O 3 , and BiVO 4 photoanodes, other metal oxide photoanodes such as CuWO 4 [216] , Bi 2 WO 6 [217] , TiFe 2 O 5 [218] , Bi 2 Mo 3 O 12 [217] , CuV 2 O 6 [219][220] , Cu 2 V 2 O 7 [219][220] , Cu 3 V 2 O 8 [221] , and FeVO 4 [222][223] have been developed in recent years.…”

Section: Discussionmentioning

confidence: 99%

Visible Light Responsive Metal Oxide Photoanodes for Photoelectrochemical Water Splitting: a Comprehensive Review on Rational Materials Design

Wang¹,

Tang²,

Wang³

2018

Journal of Inorganic Materials

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Photoelectrochemical (PEC) water splitting provides a "green" approach for hydrogen production.Photoanodes for water oxidation reactions are the bottleneck for PEC water splitting due to the involved thermodynamic and kinetic challenges. To obtain the target of 10% solar-to-hydrogen (STH) efficiency toward practical applications, efficient photoanodes should be developed. Owing to the intrinsic advantages of low cost, good light harvesting, low toxicity, and excellent (photo)-electrochemical stability, visible light responsive metal oxides such as WO 3 , α-Fe 2 O 3 and BiVO 4 have attracted great attention for potential photoanodes and significant achievements have been made in the past decades. In this review, the sate-of-the-art progresses of WO 3 , α-Fe 2 O 3 and BiVO 4 photoanodes are summarized with an emphasis on the rational materials design toward efficient PEC water splitting. Moreover, their applications in unassisted PEC water splitting systems are briefly introduced. The perspectives on the challenges and future development of visible light responsive metal oxide photoanodes are presented.

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Facile synthesis of Fe³⁺/Fe²⁺ self-doped nanoporous FeVO₄ photoanodes for efficient solar water splitting

Abstract: We demonstrated a facile and effective method to fabricate nanoporous FeVO4 photoanodes for efficient solar water splitting. More importantly, the rationally self-doped Fe2+ or Fe3+ on the FeVO4 photoanode could further improve the photoelectrochemical (PEC) performance.

Cited by 50 publications

References 28 publications

High Throughput Discovery of Effective Metal Doping in FeVO₄ for Photoelectrochemical Water Splitting

High Throughput Discovery of Effective Metal Doping in FeVO₄ for Photoelectrochemical Water Splitting

Elucidation of the opto-electronic and photoelectrochemical properties of FeVO₄ photoanodes for solar water oxidation

Visible Light Responsive Metal Oxide Photoanodes for Photoelectrochemical Water Splitting: a Comprehensive Review on Rational Materials Design

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Facile synthesis of Fe3+/Fe2+ self-doped nanoporous FeVO4 photoanodes for efficient solar water splitting

Abstract: We demonstrated a facile and effective method to fabricate nanoporous FeVO4 photoanodes for efficient solar water splitting. More importantly, the rationally self-doped Fe2+ or Fe3+ on the FeVO4 photoanode could further improve the photoelectrochemical (PEC) performance.

Cited by 50 publications

References 28 publications

High Throughput Discovery of Effective Metal Doping in FeVO4 for Photoelectrochemical Water Splitting

High Throughput Discovery of Effective Metal Doping in FeVO4 for Photoelectrochemical Water Splitting

Elucidation of the opto-electronic and photoelectrochemical properties of FeVO4 photoanodes for solar water oxidation

Visible Light Responsive Metal Oxide Photoanodes for Photoelectrochemical Water Splitting: a Comprehensive Review on Rational Materials Design

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Facile synthesis of Fe³⁺/Fe²⁺ self-doped nanoporous FeVO₄ photoanodes for efficient solar water splitting

High Throughput Discovery of Effective Metal Doping in FeVO₄ for Photoelectrochemical Water Splitting

High Throughput Discovery of Effective Metal Doping in FeVO₄ for Photoelectrochemical Water Splitting

Elucidation of the opto-electronic and photoelectrochemical properties of FeVO₄ photoanodes for solar water oxidation