Enhanced photoelectrochemical cathodic protection performance of H2O2-treated In2O3 thin-film photoelectrode under visible light

Sun, Mengmeng; Chen, Zhuoyuan; Bu, Yuyu

doi:10.1016/j.surfcoat.2015.02.023

Cited by 28 publications

(13 citation statements)

References 27 publications

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“…In 2 O 3 is an n-type, wide-band gap (3.5–3.7 eV) semiconductor with diverse technological applications in nanoelectronics and optoelectronics. − In 2 O 3 nanoparticles (NPs), with a variety of tunable morphologies, are widely used in transistors. Because of their remarkably large surface-to-volume ratio and facile formation of oxygen vacancies, they also show promising potential in gas sensors or biosensors, photocatalysis, and thermocatalysis. − …”

Section: Understanding In2o3 Catalyst For Co2 Hydrogenationmentioning

confidence: 99%

CO₂ Hydrogenation to Methanol over In₂O₃-Based Catalysts: From Mechanism to Catalyst Development

et al. 2021

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Carbon dioxide (CO 2 ) hydrogenation to methanol with H 2 produced with renewable energy represents a promising path for the effective utilization of a major anthropogenic greenhouse gas, in which catalysts play a key role for CO 2 conversion and methanol selectivity. Although still under development, indium oxide (In 2 O 3 )-based catalysts have attracted great attention in recent years due to the excellent selectivity to methanol along with high activity for CO 2 conversion. In this review, we discuss recent advances of In 2 O 3 -based catalysts for CO 2 hydrogenation based on both experimental and computational studies. Various strategies have been adopted to improve the catalytic performance by facilitating the formation of surface oxygen vacancies (In 2 O 3−x ) as active sites, the activation of CO 2 and H 2 toward hydrogenation to methanol to mitigate reverse water−gas shift reaction, and the stabilization of the key intermediates. Mechanistic insights are gained from combining catalytic kinetic studies, in situ characterization, and theoretical investigations involving CO 2 conversion via the formate HCOO* pathway versus the carboxyl COOH* pathway. Strategies to further promote selective CO 2 hydrogenation to methanol include adding a metal component such as Pd or Ni on In 2 O 3 (which may also involve formation of bimetallic In−M catalysts) to promote H 2 activation and oxygen vacancy formation, combining In 2 O 3 with an oxide promoter such as ZrO 2 to enhance CO 2 adsorption and activation, controlling the concentration of CO and H 2 O to enhance methanol formation, and adopting a second catalytic component to enhance CO 2 conversion to other desired products such as olefins or aromatics on an acid catalyst such as zeolites. Through a comprehensive overview of the recent advances in In 2 O 3related catalysts, the present review paves the way for future development in In 2 O 3 -based selective catalysts for CO 2 hydrogenation to methanol.

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Section: Understanding In2o3 Catalyst For Co2 Hydrogenationmentioning

confidence: 99%

CO₂ Hydrogenation to Methanol over In₂O₃-Based Catalysts: From Mechanism to Catalyst Development

et al. 2021

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“…However, the physical defects inside the film and the interface between the functional layer and the electron collecting layer can also impede electron transport which is often not considered. Chemical defects, such as oxygen vacancies, play a sensitive role in photocatalysis as well [33][34][35] . Oxygen vacancies in WO3 films can act for example as electron donor to enhance the PEC efficiency 12,36 .…”

Section: Introductionmentioning

confidence: 99%

“…Thus, physical defects, such as microsized holes or cracks in the film, can impact the photocatalytic activity and charge transfer efficiency. , It is known in PEC water splitting that open porosity can increase the conversion efficiency by increasing the specific surface area. ,, However, the physical defects inside the film and the interface between the functional layer and the electron collecting layer can also impede electron transport which is often not considered. Chemical defects, such as oxygen vacancies, play a sensitive role in photocatalysis as well. − Oxygen vacancies in WO 3 films can act, for example, as electron donor to enhance the PEC efficiency. , In recent density functional theory (DFT) studies on the electrochemical activity of WO 3 and Fe 2 O 3 , oxygen vacancies were found to strongly impact the overpotential. , A reduction of the overpotential of 0.2 V was found for Fe 2 O 3 (110) in ref , depending on the density of oxygen vacancies. The overpotential is a measure for the electrochemical activity and therefore has a direct impact on the performance.…”

Section: Introductionmentioning

confidence: 99%

Physical and Chemical Defects in WO₃ Thin Films and Their Impact on Photoelectrochemical Water Splitting

Zhao

Balasubramanyam

Sinha

et al. 2018

ACS Appl. Energy Mater.

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We evaluate the impact of defects in WO3 thin films on the photoelectrochemical (PEC) properties during water splitting. We study physical defects, such as micro holes or cracks, by two different deposition techniques: sputtering and atomic layer deposition (ALD). Chemical defects, such as oxygen vacancies, are tailored by different annealing atmospheres, i.e. air, N2, and O2. The results show that the physical defects inside the film increase the resistance for the charge transfer and also result in a higher recombination rate which inhibits the photocurrent generation. Chemical defects yield in an increased adsorption of OH groups on the film surface and enhance the PEC efficiency. Excess amount of chemical defects can also inhibit the electron transfer, thus decreasing the photocurrent generation. In this study, the highest performance was obtained for WO3 films deposited by ALD and annealed in air, which have the least physical defects and an appropriate amount of oxygen vacancies.

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“…The E VB of a semiconductor can be obtained by combining the XPS-VB method and linear extrapolation. 47 As shown in Fig. S4G–I,† the E VB values were 2.15 eV for In 2 O 3 , 3.16 eV for WO 3 , and 1.81 eV for CdS QDs.…”

Section: Resultsmentioning

confidence: 90%

Photoelectrochemical sandwich immunoassay of CYFRA21-1 based on In₂O₃/WO₃type-II heterojunction and CdS quantum dots-polydopamine nanospheres labeling

Liu

Sun

Liu

et al. 2022

Analyst

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Enhanced photoelectrochemical cathodic protection performance of H2O2-treated In2O3 thin-film photoelectrode under visible light

Cited by 28 publications

References 27 publications

CO₂ Hydrogenation to Methanol over In₂O₃-Based Catalysts: From Mechanism to Catalyst Development

CO₂ Hydrogenation to Methanol over In₂O₃-Based Catalysts: From Mechanism to Catalyst Development

Physical and Chemical Defects in WO₃ Thin Films and Their Impact on Photoelectrochemical Water Splitting

Photoelectrochemical sandwich immunoassay of CYFRA21-1 based on In₂O₃/WO₃type-II heterojunction and CdS quantum dots-polydopamine nanospheres labeling

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Enhanced photoelectrochemical cathodic protection performance of H2O2-treated In2O3 thin-film photoelectrode under visible light

Cited by 28 publications

References 27 publications

CO2 Hydrogenation to Methanol over In2O3-Based Catalysts: From Mechanism to Catalyst Development

CO2 Hydrogenation to Methanol over In2O3-Based Catalysts: From Mechanism to Catalyst Development

Physical and Chemical Defects in WO3 Thin Films and Their Impact on Photoelectrochemical Water Splitting

Photoelectrochemical sandwich immunoassay of CYFRA21-1 based on In2O3/WO3type-II heterojunction and CdS quantum dots-polydopamine nanospheres labeling

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Product

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CO₂ Hydrogenation to Methanol over In₂O₃-Based Catalysts: From Mechanism to Catalyst Development

CO₂ Hydrogenation to Methanol over In₂O₃-Based Catalysts: From Mechanism to Catalyst Development

Physical and Chemical Defects in WO₃ Thin Films and Their Impact on Photoelectrochemical Water Splitting

Photoelectrochemical sandwich immunoassay of CYFRA21-1 based on In₂O₃/WO₃type-II heterojunction and CdS quantum dots-polydopamine nanospheres labeling