The First Study on the Reactivity of Water Vapor in Metal–Organic Frameworks with Platinum Nanocrystals

Ogiwara, Naoki; Kobayashi, Hirokazu; Concepción, Patricia; Rey, Fernando; Kitagawa, Hiroshi

doi:10.1002/ange.201905667

Cited by 4 publications

(2 citation statements)

References 45 publications

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“…In terms of the synergetic effect, Fe(III) in PMOF(Fe) acts as a promoting center for the generation of a ferryl species (Fe(IV) = O), as a porphyrin radical cation and as an electron donor to Pt NPs. The high interface between Pt NPs and PMOF(Fe) in Pt@PMOF(Fe) and the H 2 O 2 adsorbed on the PMOF(Fe) could promote H 2 O 2 activation on the most acidic Fe 3+ Lewis sites in proximity to Pt sites, which could decrease the Pt 4f binding energies and Pt–OH bond strength, so electrochemical activity toward H 2 O 2 could be promoted . The catalytic process of Pt@PMOF(Fe) immobilized on the electrode surface could be expressed as follows − First, H 2 O 2 was formed adsorbing OH species and adsorbed on the surface of Pt.…”

Section: Resultsmentioning

confidence: 99%

“…The high interface between Pt NPs and PMOF(Fe) in Pt@PMOF(Fe) and the H 2 O 2 adsorbed on the PMOF(Fe) could promote H 2 O 2 activation on the most acidic Fe 3+ Lewis sites in proximity to Pt sites, which could decrease the Pt 4f binding energies and Pt−OH bond strength, so electrochemical activity toward H 2 O 2 could be promoted. 53 The catalytic process of Pt@PMOF(Fe) immobilized on the electrode surface could be expressed as follows 54−56 2Pt H O 2Pt(OH)…”

Section: •+mentioning

confidence: 99%

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Nanozyme-Modified Metal–Organic Frameworks with Multienzymes Activity as Biomimetic Catalysts and Electrocatalytic Interfaces

Ling

Cheng

Chen

et al. 2020

ACS Appl. Mater. Interfaces

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Many metal−organic frameworks have been designed and synthesized for biosensors because of high surface area and porosity, suitable size, and good biocompatibility. Despite recent advances, however, most of them are only used as a nanocarrier. In this work, a new artificial nanozyme was constructed on a metalloporphyrinic metal−organic framework (PMOF(Fe)), which was formed by Fe porphyrin and Zr 4+ ions. Then, ultrasmall Pt nanoparticles (Pt NPs) were loaded on the surface of PMOF(Fe) to form Pt@ PMOF(Fe). Because of the high surface area and exposed Fe activity center, PMOF(Fe) works as a nanocarrier to hinder the Pt NP aggregation and exhibits high peroxidase-mimicking activity. Hence, Pt NPs decorated on the surface of PMOF(Fe) possessed high stability and exhibited high activity. Due to the synergistic effect between PMOF(Fe) and Pt NPs, Pt@PMOF(Fe) exhibits superior catalase-and peroxidase-like activities. Moreover, Pt@PMOF(Fe) possesses high electrocatalytic activity toward the reduction of H 2 O 2 and the oxygen reduction reaction (ORR). This strategy may serve as a strong foundation to design MOF-based artificial nanozymes and develop an ideal platform for MOFs and nanozymes toward artificial enzymatic catalytic systems, fuel cells and new analytical applications.

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Section: Resultsmentioning

confidence: 99%

Section: •+mentioning

confidence: 99%

Nanozyme-Modified Metal–Organic Frameworks with Multienzymes Activity as Biomimetic Catalysts and Electrocatalytic Interfaces

Ling

Cheng

Chen

et al. 2020

ACS Appl. Mater. Interfaces

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Fabrication of Integrated Copper‐Based Nanoparticles/Amorphous Metal–Organic Framework by a Facile Spray‐Drying Method: Highly Enhanced CO₂ Hydrogenation Activity for Methanol Synthesis

et al. 2021

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We report on Cu/amUiO‐66, a composite made of Cu nanoparticles (NPs) and amorphous [Zr6O4(OH)4(BDC)6] (amUiO‐66, BDC=1,4‐benzenedicarboxylate), and Cu‐ZnO/amUiO‐66 made of Cu‐ZnO nanocomposites and amUiO‐66. Both structures were obtained via a spray‐drying method and characterized using high‐resolution transmission electron microscopy, energy dispersive spectra, powder X‐ray diffraction and extended X‐ray absorption fine structure. The catalytic activity of Cu/amUiO‐66 for CO2 hydrogenation to methanol was 3‐fold that of Cu/crystalline UiO‐66. Moreover, Cu‐ZnO/amUiO‐66 enhanced the methanol production rate by 1.5‐fold compared with Cu/amUiO‐66 and 2.5‐fold compared with γ‐Al2O3‐supported Cu‐ZnO nanocomposites (Cu‐ZnO/γ‐Al2O3) as the representative hydrogenation catalyst. The high catalytic performance was investigated using in situ Fourier transform IR spectra. This is a first report of a catalyst comprising metal NPs and an amorphous metal–organic framework in a gas‐phase reaction.

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Fabrication of Integrated Copper‐Based Nanoparticles/Amorphous Metal–Organic Framework by a Facile Spray‐Drying Method: Highly Enhanced CO₂ Hydrogenation Activity for Methanol Synthesis

et al. 2021

Self Cite

View full text Add to dashboard Cite

We report on Cu/amUiO-66, a composite made of Cu nanoparticles (NPs) and amorphous [Zr 6 O 4 (OH) 4 -(BDC) 6 ] (amUiO-66, BDC = 1,4-benzenedicarboxylate), and Cu-ZnO/amUiO-66 made of Cu-ZnO nanocomposites and amUiO-66. Both structures were obtained via a spray-drying method and characterized using high-resolution transmission electron microscopy, energy dispersive spectra, powder X-ray diffraction and extended X-ray absorption fine structure. The catalytic activity of Cu/amUiO-66 for CO 2 hydrogenation to methanol was 3-fold that of Cu/crystalline UiO-66. Moreover, Cu-ZnO/amUiO-66 enhanced the methanol production rate by 1.5-fold compared with Cu/amUiO-66 and 2.5-fold compared with g-Al 2 O 3 -supported Cu-ZnO nanocomposites (Cu-ZnO/g-Al 2 O 3 ) as the representative hydrogenation catalyst. The high catalytic performance was investigated using in situ Fourier transform IR spectra. This is a first report of a catalyst comprising metal NPs and an amorphous metalorganic framework in a gas-phase reaction.

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The First Study on the Reactivity of Water Vapor in Metal–Organic Frameworks with Platinum Nanocrystals

Cited by 4 publications

References 45 publications

Nanozyme-Modified Metal–Organic Frameworks with Multienzymes Activity as Biomimetic Catalysts and Electrocatalytic Interfaces

Nanozyme-Modified Metal–Organic Frameworks with Multienzymes Activity as Biomimetic Catalysts and Electrocatalytic Interfaces

Fabrication of Integrated Copper‐Based Nanoparticles/Amorphous Metal–Organic Framework by a Facile Spray‐Drying Method: Highly Enhanced CO₂ Hydrogenation Activity for Methanol Synthesis

Fabrication of Integrated Copper‐Based Nanoparticles/Amorphous Metal–Organic Framework by a Facile Spray‐Drying Method: Highly Enhanced CO₂ Hydrogenation Activity for Methanol Synthesis

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The First Study on the Reactivity of Water Vapor in Metal–Organic Frameworks with Platinum Nanocrystals

Cited by 4 publications

References 45 publications

Nanozyme-Modified Metal–Organic Frameworks with Multienzymes Activity as Biomimetic Catalysts and Electrocatalytic Interfaces

Nanozyme-Modified Metal–Organic Frameworks with Multienzymes Activity as Biomimetic Catalysts and Electrocatalytic Interfaces

Fabrication of Integrated Copper‐Based Nanoparticles/Amorphous Metal–Organic Framework by a Facile Spray‐Drying Method: Highly Enhanced CO2 Hydrogenation Activity for Methanol Synthesis

Fabrication of Integrated Copper‐Based Nanoparticles/Amorphous Metal–Organic Framework by a Facile Spray‐Drying Method: Highly Enhanced CO2 Hydrogenation Activity for Methanol Synthesis

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Fabrication of Integrated Copper‐Based Nanoparticles/Amorphous Metal–Organic Framework by a Facile Spray‐Drying Method: Highly Enhanced CO₂ Hydrogenation Activity for Methanol Synthesis

Fabrication of Integrated Copper‐Based Nanoparticles/Amorphous Metal–Organic Framework by a Facile Spray‐Drying Method: Highly Enhanced CO₂ Hydrogenation Activity for Methanol Synthesis