Conformal coating of ultrathin metal-organic framework on semiconductor electrode for boosted photoelectrochemical water oxidation

Dong, Yujie; Liao, Jinfeng; Kong, Zi-Cheng; Xu, Yang; Chen, Ze-Jie; Chen, Hongyan; Kuang, Dai‐Bin; Fenske, Dieter; Su, Cheng‐Yong

doi:10.1016/j.apcatb.2018.05.059

Cited by 85 publications

(42 citation statements)

References 48 publications

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“…The combined use of MOFs and photoanodes was recently demonstrated. Su et al [14b] . reported that the conformal coating of Fe‐MOFs (NH 2 ‐MIL‐101) on Ti‐doped Fe 2 O 3 as OEC could effectively improve the transport efficiency of photogenerated charge carriers.…”

Section: Introductionmentioning

confidence: 99%

Activity and Stability Boosting of an Oxygen‐Vacancy‐Rich BiVO₄ Photoanode by NiFe‐MOFs Thin Layer for Water Oxidation

Pan

Wang

et al. 2020

Angewandte Chemie

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The introduction of oxygen vacancies (Ov) has been regarded as an effective method to enhance the catalytic performance of photoanodes in oxygen evolution reaction (OER). However,t heir stability under highly oxidizing environment is questionable but was rarely studied. Herein, NiFe-metal-organic framework (NiFe-MOFs) was conformally coated on oxygen-vacancy-richB iVO 4 (Ov-BiVO 4 )a st he protective layer and cocatalyst, forming ac ore-shell structure with caffeic acid as bridging agent. The as-synthesized Ov-BiVO 4 @NiFe-MOFs exhibits enhanced stability and aremarkable photocurrent density of 5.3 AE 0.15 mA cm À2 at 1.23 V( vs. RHE). The reduced coordination number of Ni(Fe)-O and elevated valence state of Ni(Fe) in NiFe-MOFs layer greatly bolster OER, and the shifting of oxygen evolution sites from Ov-BiVO 4 to NiFe-MOFs promotes Ov stabilization. Ovs can be effectively preserved by the coating of at hin NiFe-MOFs layer,l eading to ap hotoanode of enhanced photocurrent and stability.

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Section: Introductionmentioning

confidence: 99%

Activity and Stability Boosting of an Oxygen‐Vacancy‐Rich BiVO₄ Photoanode by NiFe‐MOFs Thin Layer for Water Oxidation

Pan

Wang

et al. 2020

Angewandte Chemie

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“…This semiconductor/MOF hybrid (Ti-doped Fe2O3/NH2-MIL-101(Fe)) photoanode showed an overall efficient PEC catalysis with enhanced photocurrent density of about 2.27 mA/cm 2 at 1.23 V (vs RHE) which is approximately 2.3 times that of pristine Fe 2 O 3 . 85 A comprehensive summary for the MOFbased photoelectrocatalysts for water splitting is given in Table 1. Generally, MOF exhibits intrinsic low conductivity that impedes their practical realization in electrochemical devices on commercial scales.…”

Section: F I G U R E 1mentioning

confidence: 99%

“…Functionalized amino group ligand proved to be useful for both light absorption and stabilization of the photoexcited state of the electrode. This semiconductor/MOF hybrid (Ti‐doped Fe2O3/NH2‐MIL‐101(Fe)) photoanode showed an overall efficient PEC catalysis with enhanced photocurrent density of about 2.27 mA/cm 2 at 1.23 V (vs RHE) which is approximately 2.3 times that of pristine Fe 2 O 3 85 . A comprehensive summary for the MOF‐based photoelectrocatalysts for water splitting is given in Table 1.…”

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

confidence: 99%

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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“…[30,31] However, the instability at high temperature and poor conductivity of molecular catalysts become great obstacles of the process from design to application implementation. [32,33] Some research revealed that the partially decomposed molecular catalysts after calcination presented higher conductivity and more exposed active sites, which resulted in the obvious improvement of OER activity. Zhu et al reported quasi-ZIF-67 boosted OER catalytic activity via calcination at 350°C under N 2 atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Modification of Ti‐doped Hematite Photoanode with Quasi‐molecular Cocatalyst: A Comparison of Improvement Mechanism Between Non‐noble and Noble Metals

et al. 2021

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Loading of molecular catalyst on the surface of semiconductors is an attractive way to boost the water oxidation activity. As active sites, molecular water oxidation cocatalysts show increasing attraction and application possibility. In order to compare the advantages between molecular catalysts with non-noble and noble metals, the loading of the Fe(salen) and Ru(salen) as cocatalyst precursors on the surface of TiÀ Fe 2 O 3 was investigated Quasi-Fe(salen) and Ru(salen) improved the photocurrent density by 1.5 and 1.7 times compared to that of the original TiÀ Fe 2 O 3 photoanode, respectively. The quasi-Fe(salen) could improve the conductivity and reaction kinetics on the photoanode surface. By contrast, the notable advancements could be attributed to more reaction sites for quasi-Ru(salen) as cocatalysts. Thus, non-noble quasi-Fe(salen) is a promising cocatalyst to replace the noble metal salen, and further optimization can be expected with regard to the precise control of reaction sites.

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Conformal coating of ultrathin metal-organic framework on semiconductor electrode for boosted photoelectrochemical water oxidation

Cited by 85 publications

References 48 publications

Activity and Stability Boosting of an Oxygen‐Vacancy‐Rich BiVO₄ Photoanode by NiFe‐MOFs Thin Layer for Water Oxidation

Activity and Stability Boosting of an Oxygen‐Vacancy‐Rich BiVO₄ Photoanode by NiFe‐MOFs Thin Layer for Water Oxidation

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

Modification of Ti‐doped Hematite Photoanode with Quasi‐molecular Cocatalyst: A Comparison of Improvement Mechanism Between Non‐noble and Noble Metals

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Conformal coating of ultrathin metal-organic framework on semiconductor electrode for boosted photoelectrochemical water oxidation

Cited by 85 publications

References 48 publications

Activity and Stability Boosting of an Oxygen‐Vacancy‐Rich BiVO4 Photoanode by NiFe‐MOFs Thin Layer for Water Oxidation

Activity and Stability Boosting of an Oxygen‐Vacancy‐Rich BiVO4 Photoanode by NiFe‐MOFs Thin Layer for Water Oxidation

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

Modification of Ti‐doped Hematite Photoanode with Quasi‐molecular Cocatalyst: A Comparison of Improvement Mechanism Between Non‐noble and Noble Metals

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Activity and Stability Boosting of an Oxygen‐Vacancy‐Rich BiVO₄ Photoanode by NiFe‐MOFs Thin Layer for Water Oxidation

Activity and Stability Boosting of an Oxygen‐Vacancy‐Rich BiVO₄ Photoanode by NiFe‐MOFs Thin Layer for Water Oxidation