Enhancing efficiency of Fe2O3 for robust and proficient solar water splitting using a highly dispersed bioinspired catalyst

Banerjee, Anamika; Mondal, Biswajit; Verma, Anuradha; Satsangi, Vibha R.; Shrivastav, Rohit; Dey, Abhishek; Dass, Sahab

doi:10.1016/j.jcat.2017.04.023

Cited by 29 publications

(25 citation statements)

References 65 publications

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“…Where C, q, ϵ 0 , ϵ, N and E app are the capacitance, electric charge, permittivity in vacuum, the dielectric constant of the material, acceptor density and applied potential, respectively. The (kT/q) is the temperature‐dependent term . For that purpose, EIS was performed between 1.23 and 1.58 V (vs RHE).…”

Section: Resultsmentioning

confidence: 99%

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Effect of the Solvent Ratio (Ethylene Glycol/Water) on the Preparation of an Iron Sulfide Electrocatalyst and Its Activity towards Overall Water Splitting

et al. 2019

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The polyol method is an efficient procedure for metal sulfide preparation where polyol not only acts as a solvent but also as reducing and morphology‐modulating agent. Herein, iron sulfide particles were prepared via a modified polyol method by changing the ethylene glycol (EG) : water (H2O) ratio in the mixed solvent. Analytical techniques and electronic microscopy studies confirmed that the change in EG : H2O ratio modulated the crystal structure, morphology, and electronic structure of the prepared iron sulfide particles. The electrocatalytic activity of iron sulfide changed owing to these modulations. EG helped in the formation of a sheet‐like structure – a morphology that favours a higher accessibility to the catalytically active sites. As evidenced form electrochemical impedance studies, an increased electron density near the Fermi level, a faster substrate adsorption‐desorption rate at the active sites, and a faster charge transfer at the electrode‐electrolyte interface were the key factors for the amplification in catalytic activity. The prepared iron sulfide particles showed an overall water splitting efficiency that is comparable to that of the state‐of‐the‐art RuO2‐Pt/C couple in alkaline medium. This study shows the potential of the polyol method in the preparation and catalytic‐activity modulation of Fe−S‐based electrocatalysts.

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Section: Resultsmentioning

confidence: 99%

“…The (kT/q) is the temperature-dependent term. [43] For that purpose, EIS was performed between 1.23 and 1.58 V (vs RHE). The Z im (imaginary impedance) values at different potentials were taken from the EIS data and from that, C was calculated using the following relationship.…”

Section: Resultsmentioning

confidence: 99%

Effect of the Solvent Ratio (Ethylene Glycol/Water) on the Preparation of an Iron Sulfide Electrocatalyst and Its Activity towards Overall Water Splitting

et al. 2019

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“…[88] Figure 7e depicts the ABPE performance of the optimized NiFe 2 O 4 /Fe 2 O 3 thin films deposited on planar (NF1-P) and 3D-nanostructured substrates (NF1-NSP) relative to pure Fe 2 O 3 deposited on FTO glass under solar irradiation (100 mW cm −2 ). V b equals applied bias (V); P total is the illumination intensity of the light source (mW cm −2 ) and V is the open circuit potential recorded from the J-V curve under illumination.…”

Section: Pec Efficiencymentioning

confidence: 99%

“…In low frequency region (large impedance, far from the origin), the process is determined by the rate of mass transfer. [88] Copyright 2017, Elsevier. [30,89,90] Sometimes, there are more than one semicircles on the Nyquist plot.…”

Section: Conductivitymentioning

confidence: 99%

“…The following formula can be employed to calculate the ABPE in a two‐electrode configuration (working electrode and counter electrode)

ABPE (%) = \frac{(||, J_{normalph} (mA {cm}^{- 2})) \times (1.23 - |V_{normalb}|) (V)}{P_{total} (normalmV {normalcm}^{- 2})} \times 100

where J ph is the obtained photocurrent density under an applied bias V b (mA cm −2 ). V b equals applied bias (V); P total is the illumination intensity of the light source (mW cm −2 ) and V is the open circuit potential recorded from the J – V curve under illumination …”

Section: Basic Principlesmentioning

confidence: 99%

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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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Host/Guest Nanostructured Photoanodes Integrated with Targeted Enhancement Strategies for Photoelectrochemical Water Splitting

Wang

Zhu

et al. 2021

Advanced Science

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Photoelectrochemical (PEC) hydrogen production from water splitting is a green technology that can solve the environmental and energy problems through converting solar energy into renewable hydrogen fuel. The construction of host/guest architecture in semiconductor photoanodes has proven to be an effective strategy to improve solar-to-fuel conversion efficiency dramatically. In host/guest photoanodes, the absorber layer is deposited onto a high-surface-area electron collector, resulting in a significant enhancements in light-harvesting as well as charge collection and separation efficiency. The present review aims to summarize and highlight recent state-of-the-art progresses in the architecture designing of host/guest photoanodes with integrated enhancement strategies, including i) light trapping effect; ii) optimization of conductive host scaffolds; iii) hierarchical structure engineering. The challenges and prospects for the future development of host/guest nanostructured photoanodes are also presented.

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Enhancing efficiency of Fe2O3 for robust and proficient solar water splitting using a highly dispersed bioinspired catalyst

Cited by 29 publications

References 65 publications

Effect of the Solvent Ratio (Ethylene Glycol/Water) on the Preparation of an Iron Sulfide Electrocatalyst and Its Activity towards Overall Water Splitting

Effect of the Solvent Ratio (Ethylene Glycol/Water) on the Preparation of an Iron Sulfide Electrocatalyst and Its Activity towards Overall Water Splitting

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

Host/Guest Nanostructured Photoanodes Integrated with Targeted Enhancement Strategies for Photoelectrochemical Water Splitting

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