Expanded solar absorption spectrum to improve photoelectrochemical oxygen evolution reaction: Synergistic effect of upconversion nanoparticles and ZnFe2O4/TiO2

Lim, Yoongu; Lee, Song Yeul; Kim, Dohun; Han, Mi‐Kyung; Han, Hyun Soo; Kang, Soon Hyung; Kim, Jung Kyu; Sim, Uk; Park, Yong Il

doi:10.1016/j.cej.2022.135503

Cited by 25 publications

(14 citation statements)

References 52 publications

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“…Hydrogen production through photoelectrochemical (PEC) water splitting using sunlight has emerged as an attractive renewable approach for a green economy. , However, achieving high solar-to-hydrogen (STH) conversion efficiency is crucial and involves rapid charge carrier separation and charge carrier transfer. Due to the intrinsic wide bandgap of semiconductors (SCs), solar energy conversion efficiency remains low, and there is a need to investigate narrow-bandgap materials for enhanced conversion efficiency. , Heterogeneous semiconductor-based photocatalysis has gained increasing attention for its potential to improve photoabsorption and reduce charge carrier recombination rates, leading to better PEC performance. , Ever since Fujishima and Honda et al demonstrated the use of TiO 2 as a photoanode for hydrogen production under UV light, numerous semiconductors such as ZnO (∼3.2 eV), TiO 2 (∼3.2 eV), Cu 2 O (∼2.4 eV), WO 3 (∼2.8 eV), BiVO 4 (∼2.4 eV), and α-Fe 2 O 3 (∼1.9–2.2 eV), ZnFe 2 O 4 /TiO 2 , g-C 3 N 4 (∼2.7–2.9 eV), carbo-nitride nanotubes, etc. were exploited for PEC water splitting.…”

Section: Introductionmentioning

confidence: 99%

Integration of Ag Plasmonic Metal and WO₃/InGaN Heterostructure for Photoelectrochemical Water Splitting

Devarajulu

Loka

Goddati

et al. 2023

ACS Appl. Mater. Interfaces

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In this study, a Ag/WO 3 /InGaN hybrid heterostructure was successfully developed by sputtering and molecular beam epitaxy techniques, to obtain unique Ag nanospheres adorned with cauliflower-like WO 3 nanostructure over the InGaN nanorods (NRs). Exploiting the localized surface plasmon resonance of Ag, the Ag/WO 3 /InGaN heterostructure exhibited superior photoabsorption ability in the visible region (400−700 nm) of the solar spectrum, with a surface plasmon resonance band centered around 440 nm. Comprehensive analysis through photoluminescence spectroscopy, photocurrent measurements, and electrochemical impedance spectroscopy revealed that the Ag/WO 3 /InGaN hybrid heterostructure significantly enhances the charge carrier separation and transfer kinetics leading to improved overall photoelectrochemical (PEC) performance. The photocurrent density of the Ag/WO 3 /InGaN photoanode is 1.17 mA/cm 2 , which is about 2.72 times higher than that of pure InGaN NRs under visible light irradiation. The photoanode exhibited excellent stability for about 12 h. From the study, it has been found that the maximum applied bias photon-to-current efficiency (ABPE) is ∼1.67% at the applied bias of 0.6 V. The improved PEC water splitting efficiency of the Ag/WO 3 /InGaN photoanode is attributed to the synergistic effects of localized surface plasmon resonance (LSPR), efficient charge carrier separation and transport, and the presence of a Schottky junction. Consequently, the plasmonic metal-assisted heterojunction-based semiconductor Ag/WO 3 /InGaN demonstrates immense potential for practical applications in photoelectrochemical water splitting.

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Section: Introductionmentioning

confidence: 99%

Integration of Ag Plasmonic Metal and WO₃/InGaN Heterostructure for Photoelectrochemical Water Splitting

Devarajulu

Loka

Goddati

et al. 2023

ACS Appl. Mater. Interfaces

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“…Among the semiconductors being studied as photoanodes, TiO 2 is attractive due to its availability, non-toxicity, high stability, and low cost. However, the low light absorption, the high recombination of charge carriers, and the low charge transfer involved in the reaction are responsible for the unsatisfactory performance of the material. , Therefore, strategies such as doping, , morphology modifications, heat treatments, formation of heterojunctions, , surface decorations, , or a combination of these are studied to obtain TiO 2 -based photoelectrodes with better photoelectrochemical efficiencies. In this work, we specifically focus on two research lines that have shown promising results: surface decoration based on carbon dots and controlled reduction of TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Reduced TiO₂ Nanorods Decorated with Carbon Nanodots for Photoelectrochemical Water Oxidation

Puerres,

Polanía,

Pérez-Torres

et al. 2023

ACS Appl. Nano Mater.

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The formation of composite materials with carbon nanodots (CNDs) and electrochemical reduction of metal oxide semiconductors are attractive strategies to increase the performance of photoelectrochemical water oxidation. Here, both strategies were used with TiO2 photoelectrodes to analyze their role separately and when combined. For this purpose, TiO2 nanorods were synthesized on fluorine-doped tin oxide (FTO) substrates by a hydrothermal route; after that, TiO2 was subjected to electrochemical reduction by applying a constant potential, and finally, carbon nanodots were incorporated into the TiO2 surface by immersion of the TiO2 samples in a CND solution. The resulting photoelectrodes were characterized by different microscopy, spectroscopy, and electrochemical techniques. The results indicate that the electrochemical reduction allows to increase the lifetime of the electrons in the semiconductor, decreases the charge-transport resistance in the bulk of TiO2, and improves the water oxidation kinetics. In the case of the incorporation of CNDs on the TiO2 surface, it contributes to enhancing the separation of the electron–hole pairs and leads to a lower charge-transfer resistance from the photoelectrode to the electrolyte. In this way, the photocurrent of TiO2 (at 1.23 V vs RHE) had an increase of 36% with electrochemical reduction, 64% with CND decoration, and 103% with a combination of both strategies. These results are important to understand the role of electrochemical reduction and CND decoration in photoelectrochemical systems.

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“…Photoelectrochemical (PEC) water splitting has been regarded as a promising strategy for converting solar energy into clean and renewable hydrogen fuels. 1–4 Semiconductor materials, as the central photoanode components in PEC water splitting cells, play a crucial role in determining the solar-to-hydrogen conversion efficiency. 5–9 Among various candidates, hematite (α-Fe 2 O 3 ) is a promising photoanode material owing to its narrow band gap (∼2.1 eV), nontoxicity, natural abundance, and photostability.…”

Section: Introductionmentioning

confidence: 99%

Constructing large-size and ultrathin NiCoP nanosheets on an Fe₂O₃ photoanode toward efficient solar water splitting

Feng

Zhao

2022

J. Mater. Chem. A

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Expanded solar absorption spectrum to improve photoelectrochemical oxygen evolution reaction: Synergistic effect of upconversion nanoparticles and ZnFe2O4/TiO2

Cited by 25 publications

References 52 publications

Integration of Ag Plasmonic Metal and WO₃/InGaN Heterostructure for Photoelectrochemical Water Splitting

Integration of Ag Plasmonic Metal and WO₃/InGaN Heterostructure for Photoelectrochemical Water Splitting

Reduced TiO₂ Nanorods Decorated with Carbon Nanodots for Photoelectrochemical Water Oxidation

Constructing large-size and ultrathin NiCoP nanosheets on an Fe₂O₃ photoanode toward efficient solar water splitting

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Expanded solar absorption spectrum to improve photoelectrochemical oxygen evolution reaction: Synergistic effect of upconversion nanoparticles and ZnFe2O4/TiO2

Cited by 25 publications

References 52 publications

Integration of Ag Plasmonic Metal and WO3/InGaN Heterostructure for Photoelectrochemical Water Splitting

Integration of Ag Plasmonic Metal and WO3/InGaN Heterostructure for Photoelectrochemical Water Splitting

Reduced TiO2 Nanorods Decorated with Carbon Nanodots for Photoelectrochemical Water Oxidation

Constructing large-size and ultrathin NiCoP nanosheets on an Fe2O3 photoanode toward efficient solar water splitting

Contact Info

Product

Resources

About

Integration of Ag Plasmonic Metal and WO₃/InGaN Heterostructure for Photoelectrochemical Water Splitting

Integration of Ag Plasmonic Metal and WO₃/InGaN Heterostructure for Photoelectrochemical Water Splitting

Reduced TiO₂ Nanorods Decorated with Carbon Nanodots for Photoelectrochemical Water Oxidation

Constructing large-size and ultrathin NiCoP nanosheets on an Fe₂O₃ photoanode toward efficient solar water splitting