A metal–organic framework converted catalyst that boosts photo-electrochemical water splitting

Cardenas‐Morcoso, Drialys; Ifraemov, Raya; García‐Tecedor, Miguel; Liberman, Itamar; Giménez, Sixto; Hod, Idan

doi:10.1039/c9ta01559k

Cited by 61 publications

(48 citation statements)

References 52 publications

(53 reference statements)

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“…However, the rapid recombination of electrons generated from MOFs and the fast oxidization by charge transfer are the main problems for PEC systems. Hence, a recent study has demonstrated that a great enhancement on the performance of a water-splitting PEC could be achieved by using a surface-modified ZIF-67 MOF-derived semiconductor, which contains highly porous cobalt oxide (CoO x ) and BiVO 4 co-catalysts, as the photoanode to accelerate the kinetics of water oxidation rather than serving as a surface passivation layer [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Fe/Ni Bimetallic Organic Framework Deposited on TiO2 Nanotube Array for Enhancing Higher and Stable Photoelectrochemical Activity of Oxygen Evaluation Reaction

et al. 2020

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Photoelectrochemical (PEC) water splitting is a promising strategy to improve the efficiency of oxygen evolution reactions (OERs). However, the efficient adsorption of visible light as well as long-term stability of light-harvesting electrocatalysis is the crucial issue in PEC cells. Metal–organic framework (MOF)-derived bimetallic electrocatalysis with its superior performance has wide application prospects in OER and PEC applications. Herein, we have fabricated a nickel and iron bimetallic organic framework (FeNi-MOF) deposited on top of anodized TiO2 nanotube arrays (TNTA) for PEC and OER applications. The FeNi-MOF/TNTA was incorporated through the electrochemical deposition of Ni2+ and Fe3+ onto the surface of TNTA and then connected with organic ligands by the hydrothermal transformation. Therefore, FeNi-MOF/TNTA demonstrates abundant photoelectrocatalytic active sites that can enhance the photocurrent up to 1.91 mA/cm2 under 100 mW/cm2 and a negligible loss in activity after 180 min of photoreaction. The FeNi-MOF-doped photoanode shows predominant photoelectrochemical performance due to the boosted excellent light-harvesting ability, rapid photoresponse, and stimulated interfacial energy of charge separation under the UV-visible light irradiation conditions. The results of this study give deep insight into MOF-derived bimetallic nanomaterial synthesis for photoelectrochemical OER and provide guidance on future electrocatalysis design.

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Section: Introductionmentioning

confidence: 99%

Fe/Ni Bimetallic Organic Framework Deposited on TiO2 Nanotube Array for Enhancing Higher and Stable Photoelectrochemical Activity of Oxygen Evaluation Reaction

et al. 2020

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“…Cardenas‐Morcoso et al prepared modified BiVO 4 ‐CoOx photoelectrocatalyst by synthesizing ZIF‐67 MOF on top of BiVO 4 . After calcination, deposited MOF was converted to CoO x co‐catalysts that showed significant boosts in PEC water‐splitting 92 . Xu et al prepared a thin film coating of Co‐MOF derived from ZIF‐67.…”

Section: Synthesis Methods For Mof‐based Catalysts For Water‐splittingmentioning

confidence: 99%

Section: Recent Advances In Water‐splitting By Mof‐based Catalystsmentioning

confidence: 99%

“…After calcination, deposited MOF was converted to CoO x co-catalysts that showed significant boosts in PEC water-splitting. 92 Xu et al prepared a thin film coating of Co-MOF derived from ZIF-67. First BiVO 4 photoanode was prepared by the electrodeposition method followed by forming the ZIF-67 layer on its surface.…”

Section: Synthesis Of Mof Derivative Compositesmentioning

confidence: 99%

“…PEC characterization of modified photoanodes revealed almost four times higher photocurrents and enhanced catalytic performance compared to bare BiVO 4 photoanode (Shown in Figure 16). 92 Thin-film coating of Co 3 O 4 obtained from Co-MOF (ZIF-67) was formed on bismuth vanadate (BiVO 4 ) for improved practical efficiency of PEC water-splitting. Resultant modified photoanode exhibited hydrogen production up to 0.61 mmol/cm 2 in 5 hours (100 mW/cm 2 , 1.230 V vs RHE) that is upto 3.2 folds higher than pristine BiVO 4 .…”

Section: F I G U R E 1mentioning

confidence: 99%

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Recent advancements in MOF‐ based catalysts for applications in electrochemical and photoelectrochemical water splitting: A review

et al. 2020

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Summary A significant interest in the exploration of clean and renewable alternative energy resources has been observed in recent years to combat environmental pollution and energy shortages for a sustainable future. In this regard, hydrogen is clean, energy‐rich fuel with unlimited potential. It can be produced via water‐splitting process using the most abundant resources on earth, that is, water and solar/electrical energy. Metal‐organic frameworks (MOFs) are a category of porous crystalline materials with well‐organized structures and unique catalytic, optical, and electrical properties. MOFs and MOF‐derived materials have proved to be excellent catalysts for water‐splitting both by electrochemical and photoelectrochemical (PEC) routes. Furthermore, photochemical and electrochemical capabilities of these MOFs can be fine‐tuned to maximize their performance by modification in the bandgap, surface area, current density, electrochemical active surface area, and overpotential, through tailoring of the organic ligands and/or metal centers. A number of works have been dedicated to this quest resulting in promising and very effective results. Such as for photoelectrocatalysis, a composite nanorod array of TiO2/Co‐MOF acting as photoanode achieved one of the highest photocurrent densities of 2.93 mA/cm2 at 1.23 V (vs reverse hydrogen electrode [RHE]). In another study, MOF‐derived Co3C‐3/TiO2 photoanode attained the photocurrent density of 2.6 mA/cm2 at 1.23 V vs RHE. For electrocatalysis, Fe2O3/Ni‐MOF‐74 exhibited oxygen evolution reaction overpotential of 264 mV to reach 10 mA/cm2 of current density with a low Tafel plot of 48 mV/dec. Another novel material derived from MOF, MoO2‐PC‐rGO displayed a Tafel Plot of 41 mV/dec. Even though this field is in its infancy phase, it is attracting increased attention for promising results suggesting extraordinary potential for practical applications. Focus of this review article is on the overview of the development of MOFs for application in electrocatalytic and photoelectrocatalytic water‐splitting for hydrogen production. This review intends to provide a timely reference and insight for the advancement in catalysts based on MOFs for practical electrochemical and PEC water‐splitting in a clear and comprehensive manner. Starting with the brief introduction, fundamentals, factors affecting catalytic efficiency and evaluation parameters of water‐splitting are summarized followed by synthesis strategies and recent progress made by MOF‐based catalysts for PEC and electrochemical water‐splitting.

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H ₂ O Oxidation

2021

Electrocatalysis in Balancing the Natural Carbon Cycle

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A metal–organic framework converted catalyst that boosts photo-electrochemical water splitting

Abstract: We show that a MOF-converted compound can act as highly active co-catalyst in a water splitting photo-electrochemical cell.

Cited by 61 publications

References 52 publications

Fe/Ni Bimetallic Organic Framework Deposited on TiO2 Nanotube Array for Enhancing Higher and Stable Photoelectrochemical Activity of Oxygen Evaluation Reaction

Fe/Ni Bimetallic Organic Framework Deposited on TiO2 Nanotube Array for Enhancing Higher and Stable Photoelectrochemical Activity of Oxygen Evaluation Reaction

Recent advancements in MOF‐ based catalysts for applications in electrochemical and photoelectrochemical water splitting: A review

H ₂ O Oxidation

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A metal–organic framework converted catalyst that boosts photo-electrochemical water splitting

Abstract: We show that a MOF-converted compound can act as highly active co-catalyst in a water splitting photo-electrochemical cell.

Cited by 61 publications

References 52 publications

Fe/Ni Bimetallic Organic Framework Deposited on TiO2 Nanotube Array for Enhancing Higher and Stable Photoelectrochemical Activity of Oxygen Evaluation Reaction

Fe/Ni Bimetallic Organic Framework Deposited on TiO2 Nanotube Array for Enhancing Higher and Stable Photoelectrochemical Activity of Oxygen Evaluation Reaction

Recent advancements in MOF‐ based catalysts for applications in electrochemical and photoelectrochemical water splitting: A review

H 2 O Oxidation

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H ₂ O Oxidation