Single-Atom-Based Vanadium Oxide Catalysts Supported on Metal–Organic Frameworks: Selective Alcohol Oxidation and Structure–Activity Relationship

Otake, Ken‐ichi; Cui, Yuexing; Buru, Cassandra T.; Li, Zhanyong; Hupp, Joseph T.; Farha, Omar K.

doi:10.1021/jacs.8b05107

Cited by 209 publications

(195 citation statements)

References 45 publications

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“…[14c] Farha and co‐workers recently reported that vanadium oxide catalyst consisted of two highly crystalline MOFs with high porosity. In these MOFs, the single vanadium atoms were stabilized with different binding motifs on the metal oxide nodes . Wang and co‐workers recently applied a plasma strategy to directly form single CoO x species (CoO x –ZIF).…”

Section: Defects‐based Single Atomic Electrocatalystmentioning

confidence: 99%

Defect‐Based Single‐Atom Electrocatalysts

et al. 2018

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Single‐atom catalysts (SACs) have attracted great attention owing to their maximum atomic utilization and high catalytic performance in electrochemical reactions. But the synthesis of SACs is not easy due to large surface energies of single atomic metal sites which often lead to their aggregation. The defects on supports can serve as anchor sites to stabilize single metal atoms and prevent them from aggregation, which has become an effective method to fabricate SACs. This review summarizes the meaningful findings about the defects on supports stabilizing single metal atoms, and their applications in electrocatalytic reaction. Various defects, including the intrinsic defects or heteroatom doping of carbon‐based materials, cation or anion vacancies of metal compound supports, and other defects (step edges, lattice defects, and caves), are comprehensively summarized, and the effects of defects on designing SACs are discussed. Although there are still many challenges to fully explore the SACs, it is believed that the newly established defect sites stabilized single atoms mechanism will be helpful for designing and fabricating highly powerful single atomic electrocatalysts for practical applications.

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Section: Defects‐based Single Atomic Electrocatalystmentioning

confidence: 99%

Defect‐Based Single‐Atom Electrocatalysts

et al. 2018

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“…These results open new avenues in the design of SACs [19] and expand the understanding of the low-temperature WGSR mechanism. These results open new avenues in the design of SACs [19] and expand the understanding of the low-temperature WGSR mechanism.…”

Section: Angewandte Chemiementioning

confidence: 75%

“…In summary,Pt 1 1+ coordinated to and stabilized by awater cluster in aMOF can be obtained on agram-scale and used as an efficient catalyst for the low-temperature WGSR and ad ouble water attack mechanism to give CO 2 ,w here both oxygen atoms come from water. These results open new avenues in the design of SACs [19] and expand the understanding of the low-temperature WGSR mechanism. Figure 5.…”

Section: Angewandte Chemiementioning

confidence: 75%

Confined Pt₁¹⁺ Water Clusters in a MOF Catalyze the Low‐Temperature Water–Gas Shift Reaction with both CO₂ Oxygen Atoms Coming from Water

et al. 2018

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The synthesis and reactivity of single metal atoms in alow-valence state bound to just water,rather than to organic ligands or surfaces,isamajor experimental challenge.Herein, we showagram-scale wet synthesis of Pt 1 1+ stabilized in ac onfined space by ac rystallographically well-defined first water sphere,and with asecond coordination sphere linked to am etal-organic framework (MOF) through electrostatic and H-bonding interactions.The role of the water cluster is not only isolating and stabilizing the Pt atoms,b ut also regulating the charge of the metal and the adsorption of reactants.T his is shown for the low-temperature water-gas shift reaction (WGSR:C O+ H 2 O ! CO 2 + H 2 ), where both metal coordinated and H-bonded water molecules trigger ad ouble water attackmechanism to CO and give CO 2 with both oxygen atoms coming from water.The stabilized Pt 1+ single sites allow performing the WGSR at temperatures as lowa s508 8C.

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“…These materials are useful in catalysis, separations, sensors, and recently, as non-toxic vehicles for drug delivery. [19][20][21][22][23][24][25][26][27] We and others have described a specific type of MOF called ZIF-8, 28, 29 composed exclusively of zinc metals interconnected by methylimidazole ligands, that crystallize "biomimetically" on a variety of biomacromolecules including soluble proteins, polysaccharides, viruses, and whole cells. [30][31][32][33][34][35][36] For this study, we used CFT073, a model urosepsis strain of UPEC frequently employed in the development of new vaccines.…”

Section: Zif Encapsulates and Inactivates Upec Urosepsis Strain Cft073mentioning

confidence: 99%

Metal-Organic Framework Encapsulated Whole-Cell Vaccines Enhance Humoral Immunity against Bacterial Infection

Luzuriaga¹,

Herbert²,

Brohlin³

et al. 2020

Preprint

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Urinary tract infection, most often caused by uropathogenic Escherichia coli (UPEC), is the second most common bacterial infection. Rates of antibiotic resistance among UPEC strains is high and front-line antibiotic therapies are losing efficacy. Untreated, UPEC can ascend to the kidneys and into the bloodstream to cause potentially fatal pyelonephritis and bacteremia, respectively. Vaccine development is hampered by the genetic diversity of UPEC strains making selection of antigens capable of inducing broad protection difficult. Whole cell UPEC vaccines offer a solution to the antigen selection problem, however, current inactivation methods are harsh and degrade surface antigens resulting in a weak immune response. Here, we demonstrate a method to gently inactivate whole cell UPEC by encasing them in a crystalline metalcoordination polymeric matrix called a Metal-Organic Framework. This process encapsulates read-to-use composites within 30 minutes in water and at ambient temperatures. We show this new formulation greatly improves survivability in a murine model of UPEC bacteremia compared to standard inactivated formulations. The simplicity of the preparation and use suggests this method could be applied as a point-of-care measure to create therapeutic and prophylactic vaccines against patient derived samples.

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Single-Atom-Based Vanadium Oxide Catalysts Supported on Metal–Organic Frameworks: Selective Alcohol Oxidation and Structure–Activity Relationship

Cited by 209 publications

References 45 publications

Defect‐Based Single‐Atom Electrocatalysts

Defect‐Based Single‐Atom Electrocatalysts

Confined Pt₁¹⁺ Water Clusters in a MOF Catalyze the Low‐Temperature Water–Gas Shift Reaction with both CO₂ Oxygen Atoms Coming from Water

Metal-Organic Framework Encapsulated Whole-Cell Vaccines Enhance Humoral Immunity against Bacterial Infection

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Single-Atom-Based Vanadium Oxide Catalysts Supported on Metal–Organic Frameworks: Selective Alcohol Oxidation and Structure–Activity Relationship

Cited by 209 publications

References 45 publications

Defect‐Based Single‐Atom Electrocatalysts

Defect‐Based Single‐Atom Electrocatalysts

Confined Pt11+ Water Clusters in a MOF Catalyze the Low‐Temperature Water–Gas Shift Reaction with both CO2 Oxygen Atoms Coming from Water

Metal-Organic Framework Encapsulated Whole-Cell Vaccines Enhance Humoral Immunity against Bacterial Infection

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Confined Pt₁¹⁺ Water Clusters in a MOF Catalyze the Low‐Temperature Water–Gas Shift Reaction with both CO₂ Oxygen Atoms Coming from Water