Enhanced proton and electron reservoir abilities of polyoxometalate grafted on graphene for high-performance hydrogen evolution

Liu, Rongji; Zhang, Guangjin; Cao, Hongbin; Zhang, Suojiang; Xie, Yongbing; Haider, Ali; Kortz, Ulrich; Chen, Banghao; Dalal, Naresh S.; Zhao, Yongsheng; Zhi, Linjie; Wu, C.L.; Yan, Lingling; Su, Zhong‐Min; Keita, Bineta

doi:10.1039/c5ee03503a

Cited by 151 publications

(112 citation statements)

References 66 publications

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“…[84][85][86] Several reports can be found in the literature concerningt he immobili-zation of POMs in carbon materials, which include multi-walled carbon nanotubes (MWCNT), [87][88][89] single-walledc arbon nanotubes (SWCNT), [90][91][92][93] mesoporous carbons, [94] activated carbons (AC), [95] graphene, [90,91,96] and graphene oxide. [81,97] Awaga et al [92,93] developed POM@carbonh ybridst hat were used as cathode materials in rechargeablel ithium batteries. The POMs were attached to the SWCNT through the electrostatic attraction betweent he nBu 4 N + counter ions that interacted with the SWCNT,c reating positive sites, and the negatively charged PMo 12 .S imilar work was developedb yF ernandes et al [90,91] where severalK eggin-type POMs (PMo 12 ,P Mo 11 ,P Mo 11 V, or PMo 10 V 2 )w erei mmobilized onto SWCNT,g raphene flakes (GF) or carbon black Vulcan (CBV).…”

Section: Polyoxometalate-based (Nano)compositesmentioning

confidence: 99%

“…The POMs were attached to the SWCNT through the electrostatic attraction betweent he nBu 4 N + counter ions that interacted with the SWCNT,c reating positive sites, and the negatively charged PMo 12 .S imilar work was developedb yF ernandes et al [90,91] where severalK eggin-type POMs (PMo 12 ,P Mo 11 ,P Mo 11 V, or PMo 10 V 2 )w erei mmobilized onto SWCNT,g raphene flakes (GF) or carbon black Vulcan (CBV). Liu et al [97] reported ao ne-step electrochemical reduction synthesis of P 8 [98] or with SWCNT. [88] Kulesza's group [99][100][101][102] has also been actively workingi nt he fieldo fc arbon nanotubes modified with Keggin and Dawson-type POMs, namely [PMo 12 O 40 ] 3À and [P 2 W 17 VO 62 ] 8À for different applications: electrocatalysis, charge storaged evices, and fuel cells.…”

Section: Polyoxometalate-based (Nano)compositesmentioning

confidence: 99%

“…Scheme of the a) one-step electrochemical reduction synthesis of the P 8 W 48 /rGO nanocomposite, b) polarization curveso btained for the different ECs as specified, and c) ECs stability tests for P 8 W 48 /rGO in 0.5 m H 2 SO 4 for the 1st and 1000thC Vsweep, n = 100 mV s À1 .Adaptedf rom Ref [97]. with permission of The Royal Society of Chemistry (2016).…”

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confidence: 99%

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POM & MOF‐based Electrocatalysts for Energy‐related Reactions

et al. 2018

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Electrocatalysis plays a central role in clean energy conversion, enabling a number of sustainable processes for future technologies and the development of highly efficient and cost‐effective materials is one of the current major challenges. This results from the current global energy crisis, reflected in the depletion of fossil fuels and growth of the environmental pollution, which has stimulated the development of novel renewable energy storage and conversion technologies. Currently, several electrocatalysts have been proposed and among them are the polyoxometalates (POMs), the metal‐organic frameworks (MOFs) and their based composites.

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Section: Polyoxometalate-based (Nano)compositesmentioning

confidence: 99%

Section: Polyoxometalate-based (Nano)compositesmentioning

confidence: 99%

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POM & MOF‐based Electrocatalysts for Energy‐related Reactions

et al. 2018

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“…[12][13][14][15][16][17][18] Currently,t hese materials are still hampered by their low electricalc onductivity and their fast degradation due to irreversible redox processes on the surfaceo ft he material. Although molecular polyoxometalates (POMs) are well known for their multielectront ransfer reactivity (e.g.,f or the OER, ORR, and hydrogen-evolution reactions), [27][28][29][30] their stable linkaget oc onductive substrates is still ac hallenge owing to their solubility in many commone lectrolytes, particularly in water. [19][20][21][22][23] Although top-downs yntheses of transition-metal oxide/carbide-carbon composites have been explored in detail,t he bottom-up fabrication of such composites starting from molecular metal oxide precursors has only recently become af ocus in the design of energy materials.…”

Section: Introductionmentioning

confidence: 99%

Transition‐Metal Oxides/Carbides@Carbon Nanotube Composites as Multifunctional Electrocatalysts for Challenging Oxidations and Reductions

Xing

Liu

Cao

et al. 2019

Chemistry A European J

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Ther apid development of renewable-energy technologies such as water splitting, rechargeable metal-air batteries, and fuel cells requires highly efficient electrocatalysts capable of the oxygen-reduction reaction( ORR) and the oxygen-evolution reaction( OER). Herein, we report af acile sonication-driven synthesis to deposit the molecular manganese vanadium oxide precursor [Mn 4 V 4 O 17 (OAc) 3 ] 3À on multiwalled carbon nanotubes (MWCNTs). Thermal conversion of this composite at 900 8Cg ives nanostructured manganese vanadium oxides/carbides, which are stably linked to the MWCNTs. The resulting composites show excellent electrochemical reactivity for ORR and OER, and significant reactivi-ty enhancements compared with the precursors and aP t/C reference are reported.N otably,e ven under harsh acidic conditions, long-term OER activity at low overpotential is reported. In addition, we report exceptional activity of the composites for the industrially important Cl 2 evolution from an aqueous HCl electrolyte. The new composite material showsh ow molecular deposition routes leading to highly active and stable multifunctional electrocatalysts can be developed.T he facile design could in principle be extended to multiple catalystc lasses by tuning of the molecular metal oxide precursor employed.Supporting information and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.Scheme1.Schematicillustration of the synthesized composites( MC x / MO x = Mn 7 C 3 /V 8 C 7 /MnO).Figure 1. PowderX-ray diffraction of a) composites prepared at different temperatures and b) 1-900 with specified peaks.

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“…For example, Zhang et al. presented the P 8 W 48 /rGO nanomaterial as an efficient electrocatalyst for the HER in acidic aqueous solution . Ma et al.…”

Section: Introductionmentioning

confidence: 99%

Devisable POM/Ni Foam Composite: Precisely Control Synthesis toward Enhanced Hydrogen Evolution Reaction at High pH

Jia

Streb

Song

2019

Chemistry A European J

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Polyoxometalates (POMs) are promising catalysts for the electrochemical hydrogen production from water owing to their high intrinsic catalytic activity and chemical tunability.H owever,p oor electrical conductivity and easy detachment of the POMs from the electrode cause significant challenges under operating condition. Herein, as imple onestep hydrothermal methodi sr eportedt os ynthesize as eries of Dexter-Silverton POM/Ni foam composites (denoted as NiM-POM/Ni; M = Co, Zn, Mn), in which the stable linkage between the POM catalysts and the Ni foam electrodes lead to high activity for the hydrogen evolution reaction (HER).Amongthem, the highest HER performance can be observed in the NiCo-POM/Ni, featuring an overpotential of 64 mV (at 10 mA cm À2 ,v s. reversible hydrogen electrode), and aT afel slope of 75 mV dec À1 in 1.0 m aqueous KOH. Moreover, the NiCo-POM/Ni catalyst showedahigh faradaic efficiency % 97 %f or HER. Post-catalytic of NiCo-POM/Ni analyses showedv irtually no mechanical or chemical degradation. The findings propose af acile and inexpensivem ethodt o designs table and effective POM-based catalysts for HER in alkaline water electrolysis.

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Enhanced proton and electron reservoir abilities of polyoxometalate grafted on graphene for high-performance hydrogen evolution

Abstract: A 3D configuration of high-quality graphene sheets and a polyoxometalate [H7P8W48O184]33− showing excellent hydrogen evolution activity at extremely low overpotential.

Cited by 151 publications

References 66 publications

POM & MOF‐based Electrocatalysts for Energy‐related Reactions

POM & MOF‐based Electrocatalysts for Energy‐related Reactions

Transition‐Metal Oxides/Carbides@Carbon Nanotube Composites as Multifunctional Electrocatalysts for Challenging Oxidations and Reductions

Devisable POM/Ni Foam Composite: Precisely Control Synthesis toward Enhanced Hydrogen Evolution Reaction at High pH

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