Spontaneous linker-free binding of polyoxometalates on nitrogen-doped carbon nanotubes for efficient water oxidation

Lee, Gil Yong; Kim, Insu; Lim, Joonwon; Yang, Moon Young; Choi, Daeseon; Gu, Yujin; Oh, Youngtak; Kang, Seok Hun; Nam, Yoon Sung; Kim, Sang Ouk

doi:10.1039/c6ta09306j

Cited by 49 publications

(41 citation statements)

References 53 publications

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“…The linear region in the LSV curve was fitted to the Tafel plot (Figure b) to quantitatively compare the reaction kinetics of different composite material modified electrodes . PW 12 /Ag/graphene‐a and PW 12 /Ag/graphene‐b give the Tafel slope of 190 and 192 mV dec –1 , respectively, which are significantly lower than the comparative catalysts including Ag/graphene, PW 12 /Ag/graphene, PW 12 /graphene and graphene with the Tafel slopes of 221, 272, 336 and 358 mV dec –1 , respectively, indicating their faster water oxidation kinetics …”

Section: Resultsmentioning

confidence: 99%

Keggin‐Type Polyoxometalate Modified Ag/Graphene Composite Materials for Electrocatalytic Water Oxidation

Chang

Sang

et al. 2019

Eur J Inorg Chem

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Here, two new polyoxometalate (POM)-based biimidazole (H 2 biim) complexes formulated as [Ag(H 2 biim) 2 ] 2 [Ag 4 -(H 2 biim) 4 ][(PW 12 O 40 ) 2 ] (1) and [Ag(H 3 biim) 2 ][PW 12 O 40 ]·4H 2 O (2) were synthesized by a hydrothermal method, and their structures were determined by single-crystal X-ray diffraction and other physico-chemical and spectroscopic methods. Furthermore, by using 1 and 2 as precursors, graphene as a carrier and N,N-dimethylformamide (DMF) as a reducing agent, two kinds of POM and Ag nanoparticle with high dispersion loaded graphene composite materials (denoted as PW 12 /Ag/graphene-[a] Figure 2. SEM image (a), TEM image (b), EDS elemental mapping (c), HRTEM image (d) of PW 12 /Ag/graphene-a.

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Section: Resultsmentioning

confidence: 99%

Keggin‐Type Polyoxometalate Modified Ag/Graphene Composite Materials for Electrocatalytic Water Oxidation

Chang

Sang

et al. 2019

Eur J Inorg Chem

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“…Vanadium substituted phosphomolybdate supported on to carbon derived from potato was reported by Rafiee et al The material was found to be excellent catalyst for oxidative desulfurization with recyclability upto 4 cycles . Co‐POM supported mesoporous carbon nitride was found to be efficient water oxidation catalyst than conventional Co‐based oxidation catalyst . The high surface area of the catalyst enhances the dispersion of Co‐POM and also prevents the deactivation.…”

Section: Introductionmentioning

confidence: 90%

N‐Doped Carbon Wrapped Polyoxometalate Derived from POM‐IL Hybrid: A Heterogeneous Catalyst for the Synthesis of Coumarin Derivatives under Solvent‐Free Conditions

Ramalingam

Chandhru

Manickam³

et al. 2019

Eur J Inorg Chem

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Vanadium substituted Keggin type polyoxometalate loaded N-doped carbon was prepared from polyoxometalate ionic liquid hybrid by carbonization process. The decomposition of organic part generates various functional groups leaving polyoxometalate part intact. The catalyst was characterized by elemental analysis, FTIR, MAS 13 C NMR, XPS and electron microscopy studies. The presence of carboxylic acids, aromatic and hetero-aromatic groups in the catalyst was confirmed by [a]

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“…In this context, Piccin, Fabris and colleagues carried out groundbreaking work on the binding of {Ru 4 } to a functionalized graphene electrode surface, studying the mode of binding and the influence of the graphene surface on the water oxidation mechanism using DFT and molecular dynamics [60]. Nam, Kim and colleagues have studied the linker-free binding of {Co 4 } to N-doped carbon nanotubes using a combination of experimental and theoretical techniques [61]. Fontecave, Mellot-Draznieks, Dolbecq and colleagues investigated the immobilization of {Co 4 } in a metal-organic framework along with a photosensitizer, again using a combined experimental and theoretical approach [62].…”

Section: Theoretical Simulations For Mechanistic Insights Into Pom-wocsmentioning

confidence: 99%

The Reactivity and Stability of Polyoxometalate Water Oxidation Electrocatalysts

et al. 2019

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This review describes major advances in the use of functionalized molecular metal oxides (polyoxometalates, POMs) as water oxidation catalysts under electrochemical conditions. The fundamentals of POM-based water oxidation are described, together with a brief overview of general approaches to designing POM water oxidation catalysts. Next, the use of POMs for homogeneous, solution-phase water oxidation is described together with a summary of theoretical studies shedding light on the POM-WOC mechanism. This is followed by a discussion of heterogenization of POMs on electrically conductive substrates for technologically more relevant application studies. The stability of POM water oxidation catalysts is discussed, using select examples where detailed data is already available. The review finishes with an outlook on future perspectives and emerging themes in electrocatalytic polyoxometalate-based water oxidation research.

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Spontaneous linker-free binding of polyoxometalates on nitrogen-doped carbon nanotubes for efficient water oxidation

Abstract: Linker-free spontaneous binding of Co4POMs on NCNTs are presented via electrostatic hybridization for efficient water oxidation at neutral pH. Co4POM/NCNT hybrids exhibited outstanding catalytic activities for water oxidation under neutral conditions.

Cited by 49 publications

References 53 publications

Keggin‐Type Polyoxometalate Modified Ag/Graphene Composite Materials for Electrocatalytic Water Oxidation

Keggin‐Type Polyoxometalate Modified Ag/Graphene Composite Materials for Electrocatalytic Water Oxidation

N‐Doped Carbon Wrapped Polyoxometalate Derived from POM‐IL Hybrid: A Heterogeneous Catalyst for the Synthesis of Coumarin Derivatives under Solvent‐Free Conditions

The Reactivity and Stability of Polyoxometalate Water Oxidation Electrocatalysts

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