Mn-doping and NiFe layered double hydroxide coating: Effective approaches to enhancing the performance of α-Fe2O3 in photoelectrochemical water oxidation

Huang, Jingwei; Hu, Guowen; Ding, Yong; Pang, Mingchun; Ma, Baochun

doi:10.1016/j.jcat.2016.05.007

Cited by 110 publications

(44 citation statements)

References 59 publications

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“…As shown in Fig. 7a, the rate for O2 evolution at the surface of BiVO4/NiFe-LDH photoanode is 29.6 µmol h −1 cm −2 , and there is no obvious decay in this performance at the initial 3 h. This performance is comparable with Mn-doping Fe2O3/NiFe-LDH (9.18 µmol h −1 cm −2 , 2 h) [9], Co-Pi/GCN/BiVO4 (25.5 µmol h −1 cm −2 , 2 h) [28] and Fe2O3/FeOOH (10.1 µmol h −1 cm −2 , 70 h) [7] photocells. In addition, the high PEC activity of BiVO4/ NiFe-LDH photoanode can be lasted over 30 h observed from the I-t curve for water splitting as shown in Fig.…”

Section: Water Photoelectrolysis On Bivo4/nife-ldh Photoanodementioning

confidence: 58%

“…This value is higher than other OECs decorated on un-doped BiVO4 (Table S2) and some photoanodes decorated with NiFe-LDH as OECs, e.g., NiFe-LDH/Ta3N5 (1.7 mA cm −2 at 1.23 V vs. RHE) [26], TiO2/rGO/NiFe-LDH (1.74 mA cm −2 at 1.245 V vs. RHE) [5], Mn-doping Fe2O3/NiFe-LDH (ca. 2.1 mA cm −2 at 1.23 V vs. RHE) [9], quantum dot/LDH/BiVO4 (2.23 mA cm −2 at 1.23 V vs. RHE) [17]. It is even comparable to the porous BiVO4 photoanode decorated with FeOOH/NiOOH dual OECs (4.2 mA cm −2 at 1.23 V vs. RHE) [13].…”

Section: Resultsmentioning

confidence: 82%

“…Metal oxides acting as photoanodes for PEC light conversion, such as TiO2 [5,6], α-Fe2O3 [7][8][9][10], WO3 [11,12], have attracted wide attention because of their low cost, environment-friendliness and stability under oxidizing conditions. Among them, BiVO4 is the top performer due to its relatively small band gap, adequate conduction band edge position and moderate charge transport properties [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…They may serve as promising OEC candidates for PEC water splitting. Nowadays, they have been applied to some potential photoanodes, including TiO2 [5], Fe2O3 [9], TaN3 [26], which have shown enhanced performances in both onset potentials and photocurrent densities. In addition, the LDHs are synthesized simply and grow on substrate easily in the form of nanostructure [22].…”

Section: Introductionmentioning

confidence: 99%

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Promoting charge carrier utilization by integrating layered double hydroxide nanosheet arrays with porous BiVO4 photoanode for efficient photoelectrochemical water splitting

Huang

Xin

et al. 2017

Sci. China Mater.

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The increasing exploration of renewable and clean power sources have driven the development of highly active materials for photoelectrochemical (PEC) water splitting. However, it is still a great challenge to enhance the charge utilization. Herein, we report a facile method to fabricate composite photoanode with porous BiVO4 film as the photon absorber and layered double hydroxide (LDH) nanosheet arrays as the oxygen-evolution cocatalysts (OECs). The as-prepared BiVO4/NiFe-LDH photoanode shows an excellent performance for PEC water splitting benefitting from the synergistic effect of the superior charge separation efficiency facilitated by porous BiVO4 film and the excellent water oxidation activity resulting from LDH nanosheet arrays. A photocurrent density is 4.02 mA cm −2 at 1.23 V vs. the reversible hydrogen electrode (RHE). Furthermore, the O2 evolution rate at the surface of BiVO4/NiFe-LDH photoanode is as high as 29.6 µmol h −1 cm −2 and the high activity for water oxidation is maintained for over 30 h. Impressively, the performance of the as-fabricated composite photoanode for PEC water splitting can be further enhanced through incorporating a certain amount of Co 2+ cation into NiFe-LDH as OEC. The photocurrent density is achieved up to 4.45 mA cm −2 at 1.23 V vs. RHE. This value is the highest yet reported for un-doped BiVO4-based photoanodes so far.

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Section: Water Photoelectrolysis On Bivo4/nife-ldh Photoanodementioning

confidence: 58%

Section: Resultsmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Promoting charge carrier utilization by integrating layered double hydroxide nanosheet arrays with porous BiVO4 photoanode for efficient photoelectrochemical water splitting

Huang

Xin

et al. 2017

Sci. China Mater.

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“…[196] Copyright 2018, American Chemical Society. Nowadays, the most commonly used LDH is NiFe-LDH, as Ni and Fe are both earth-abundant and it shows the best catalytic activity among the Ni-based LDH, which was reported by Diaz-Morales et al [189] They have been applied to some potential metal-based photoanodes including Ta 3 N 5 , [190] BiVO 4 , [191,192] WO 3 , [193] α-Fe 2 O 3 , [194] and have shown promoted performance in onset potentials, photocurrent densities, as well as photostability. Reproduced with permission.…”

Section: Ldhsmentioning

confidence: 94%

Rational Design and Construction of Cocatalysts for Semiconductor‐Based Photo‐Electrochemical Oxygen Evolution: A Comprehensive Review

et al. 2018

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Photo‐electrochemical (PEC) water splitting, as an essential and indispensable research branch of solar energy applications, has achieved increasing attention in the past decades. Between the two photoelectrodes, the photoanodes for PEC water oxidation are mostly studied for the facile selection of n‐type semiconductors. Initially, the efficiency of the PEC process is rather limited, which mainly results from the existing drawbacks of photoanodes such as instability and serious charge‐carrier recombination. To improve PEC performances, researchers gradually focus on exploring many strategies, among which engineering photoelectrodes with suitable cocatalysts is one of the most feasible and promising methods to lower reaction obstacles and boost PEC water splitting ability. Here, the basic principles, modules of the PEC system, evaluation parameters in PEC water oxidation reactions occurring on the surface of photoanodes, and the basic functions of cocatalysts on the promotion of PEC performance are demonstrated. Then, the key progress of cocatalyst design and construction applied to photoanodes for PEC oxygen evolution is emphatically introduced and the influences of different kinds of water oxidation cocatalysts are elucidated in detail. Finally, the outlook of highly active cocatalysts for the photosynthesis process is also included.

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The Measurements and Efficiency Definition Protocols in Photoelectrochemical Solar Hydrogen Generation

Huang

Wang

2018

Photoelectrochemical Solar Cells

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Mn-doping and NiFe layered double hydroxide coating: Effective approaches to enhancing the performance of α-Fe2O3 in photoelectrochemical water oxidation

Cited by 110 publications

References 59 publications

Promoting charge carrier utilization by integrating layered double hydroxide nanosheet arrays with porous BiVO4 photoanode for efficient photoelectrochemical water splitting

Promoting charge carrier utilization by integrating layered double hydroxide nanosheet arrays with porous BiVO4 photoanode for efficient photoelectrochemical water splitting

Rational Design and Construction of Cocatalysts for Semiconductor‐Based Photo‐Electrochemical Oxygen Evolution: A Comprehensive Review

The Measurements and Efficiency Definition Protocols in Photoelectrochemical Solar Hydrogen Generation

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