Cobalt vanadate as highly active, stable, noble metal-free oxygen evolution electrocatalyst

Xing, Man; Kong, Ling‐Bin; Liu, Mao‐Cheng; Liu, Lingyang; Kang, Long; Luo, Yong

doi:10.1039/c4ta03776f

Cited by 184 publications

(103 citation statements)

References 36 publications

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“…5a). The value is also lower than those of Co 3 V 2 O 8 (359 mV) [40], FeNiCoO 4 (350 mV) [60] and MnO 2 /NiCo 2 O 4 NF (340 mV) [61]. We can find that the RuO 2 shows the overpotential about 375 mV to reach a current density of 10 mA cm −2 .…”

Section: Electrochemical Performance For Oermentioning

confidence: 75%

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Cobalt-vanadium bimetal-based nanoplates for efficient overall water splitting

Xiao

Tian

et al. 2017

Sci. China Mater.

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The development of effective and low-cost catalysts for overall water splitting is essential for clean production of hydrogen from water. In this paper, we report the synthesis of cobalt-vanadium (Co-V) bimetal-based catalysts for the effective water splitting. The Co 2 V 2 O 7 ·xH 2 O nanoplates containing both Co and V elements were selected as the precursors. After the calcination under NH 3 atmosphere, the Co 2 VO 4 and Co/VN could be obtained just by tuning the calcination temperature. Electrochemical tests indicated that the Co-V bimetal-based materials could be used as active hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) catalyst by regulating their structure. The Co/VN showed good performance for HER with the onset potential of 68 mV and can achieve a current density of 10 mA cm −2 at an overpotential of 92 mV. Meanwhile, the Co 2 VO 4 exhibited the obvious OER performance with overpotential of 300 mV to achieve a current density of 10 mA cm −2 . When the Co 2 VO 4 and Co/VN were used as the anode and cathode in a twoelectrode system, respectively, the cell needed a voltage of 1.65 V to achieve 10 mA cm −2 together with good stability. This work would be indicative to constructing Co-V bimetalbased catalysts for the catalytic application.

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Section: Electrochemical Performance For Oermentioning

confidence: 75%

“…The good conductivity and stability of VN are also favorable for its application either as catalyst or as support. It is shown that the combination of oxides with V and Co can result in OER active catalysts [40][41][42]. Also, the effective combination of early and late TMs is useful for designing the advanced materials [43][44][45].…”

Section: Introductionmentioning

confidence: 99%

Cobalt-vanadium bimetal-based nanoplates for efficient overall water splitting

Xiao

Tian

et al. 2017

Sci. China Mater.

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“…2a, the 2p 3/2 and 2p 1/2 XPS peaks for V at 517.3 eV and 524.42 eV, respectively, are observed, which indicates that the vanadium is mainly present in the V (V) state, and a weak peak at 516.4 eV (2p 3/2 ) reveals that a tiny amount of vanadium are V (IV) phase. 24,42,43 The existence of V (IV) phase is possibly due to the residue of vanadium source (V (IV) in VOSO 4 ). The XPS peaks of Co are (Fig.…”

Section: Resultsmentioning

confidence: 99%

A trimetallic V–Co–Fe oxide nanoparticle as an efficient and stable electrocatalyst for oxygen evolution reaction

et al. 2015

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Electronic Supplementary Informa on (ESI) available: additional XRD spectra, polarization curves, Tafel plots and electrolyte resistance of catalysts prepared in this work, overall XPS spectra, nitrogen adsorption-desorption isotherm and EIS spectra of V-Co-Fe-343, List of relative parameters for oxygen evolution reaction. See Hydrogen (H2) generated from water splitting is deemed as the ideal replacement for conventional sources of energy. Catalysts play a valuable role in water splitting, especially the oxygen evolution reaction (OER). Here, we report a Fe-doped Co3V2O8 nanoparticle catalyst ( iron-rich V-Co-Fe), which possesses outstanding OER catalytic activity with ƞj = 10 mA cm -2 = 307 mV, and a low Tafel slope of 36 mV dec -1 , benefiting by large degree of amorphization, rich porous structure as well as high specific surface area (about 232.1 m 2 g -1 ). And, more remarkable, the catalytic performance of the V-Co-Fe catalyst is markedly superior to commercial ruthenium oxide. In addition, the durability of the V-Co-Fe catalyst is fine. The current density collapses by less than 3 percent at 1.55V vs. RHE after 11 h, in comparison with the initial value. Moreover, this work reveals that the V-Co-Fe catalyst displays an excellent performance in both OER catalytic activity and stability, which may have the potential to be the ideal substitute of noble metal-based catalysts for water splitting to obtain affordable clean energy.

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“…[11][12][13] Nevertheless,i nc ontrast to the active research on the synthesis of mixed transition-metal oxides (TMOs;d onated as A x B 3-x O 4 ;A ,B= Co,N i, Zn, Mn, Fe) [11] as important mixed-metal oxides,m etal vanadates appear to be underexplored, likely because of the lack of suitable synthetic methods. [14][15][16] Herein, we report the hydrothermal synthesis of the new phase of Co 3 V 2 O 8 ·n H 2 Ow ith non-spherical structures and ac omplex geometry.W ith properly manipulating the precursor system and thus reaction kinetics,the growth of certain specific planes could be inhibited simply by changing the NaOH content in the presence of NH 4 + without the use of any template or surfactant;t his approach resulted in the gradual evolution of solid hexagonal prismatic pencils into concave hexagonal prismatic pencils and finally into hollow hexagonal prismatic pencils (HHPPs). As shown in Figure 1, we used cobalt salt and ammonium metavanadate as reaction precursors by varying the amount of NaOH to establish general principles for controlling/inhibiting the growth of some planes and the hollowing process for the synthesis of Co 3 V 2 O 8 ·n H 2 O pencils.I mpressively,w hen applied as an anode material for LIBs,t hese Co 3 V 2 O 8 ·n H 2 OH HPPs exhibit ah igh specific capacity with an excellent rate capability and enhanced cycling stability,m aking them potential electrode materials for LIBs.…”

mentioning

confidence: 99%

Hydrothermal Synthesis of Unique Hollow Hexagonal Prismatic Pencils of Co₃V₂O₈⋅n H₂O: A New Anode Material for Lithium‐Ion Batteries

Xiong

Qian

et al. 2015

Angewandte Chemie

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Hollow structures of transition-metal oxides,particularly mixed-metal oxides,c ould be promising for various applications such as lithium-ion batteries (LIBs). Compared to the synthesis of metal oxide hollows pheres by the template method, non-spherical metal oxide hollowh exagonal polyhedra have not been developed to date.H erein, we report the controlled hydrothermal synthesis of an ew phase of Co 3 V 2 O 8 ·n H 2 Oh ollowh exagonal prismatic pencils (HHPPs), which is composed of uniform structural units.B y varying the amount of NaOH in the presence of NH 4 + and without any template or organic surfactant, the hexagonal prismatic pencils gradually transform from solid into hollow structures,with sizes varying from 5to20mm. The structure of pencils can be preserved only in al imited range of the molar ratio of OH À /NH 4 + .A sanew anode material for LIBs,s uch hollowp encils exhibit impressive lithium storage properties with high capacity,g ood cycling stability,a nd superior rate capability.Hollow micro-/nanostructures have attracted considerable attention because of their structure-dependent properties and widespread applications in many areas,i ncluding catalysis, drug delivery,b iomedicine,a nd energy storage and conversion. [1][2][3][4] As ar esult, the controllable preparation of hollow materials with ac omplex composition and delicate morphological control has become increasingly fascinating and vital for both fundamental studies and practical applications.A variety of synthetic protocols have been developed to prepare various hollow structures with different morphologies and desired micro-and nanostructures based on different principles,i ncluding the Kirkendall effect, galvanic replacement, ionic exchange,c hemical etching, and templating and Ostwald ripening.[5-10] To date,m ost complex hollow structures have been synthesized through templating strategies using different colloidal templates,a nd the geometry of these products obtained in practice is mostly spherical. For example,X ua nd Wang prepared multishelled Cu 2 Oh ollow spheres by am ultilamellar micelle templating route.[7] Lai et al. designed ag eneral route for the synthesis of several oxide multi-shelled hollow microspheres using carbonaceous microspheres as templates,w hich manifest improved gassensing properties.[9] Zeng and Xiong reported the synthesis of multishelled Cu 2 Shollow spheres by aserial ion-exchange method.[10] Nevertheless,t here have been no reports to date on the formation of non-spherical hollow structures with complex geometry solely by in situ selective inhibition of growth in certain planes.Mixed-valence metal oxides with different metal cations have demonstrated high electrochemical activities due to their interfacial effects and the synergic effects of the multiple metal species. [11][12][13] Nevertheless,i nc ontrast to the active research on the synthesis of mixed transition-metal oxides (TMOs;d onated as A x B 3-x O 4 ;A ,B= Co,N i, Zn, Mn, Fe) [11] as important mixed-metal oxides,m etal vanadates appe...

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Cobalt vanadate as highly active, stable, noble metal-free oxygen evolution electrocatalyst

Cited by 184 publications

References 36 publications

Cobalt-vanadium bimetal-based nanoplates for efficient overall water splitting

Cobalt-vanadium bimetal-based nanoplates for efficient overall water splitting

A trimetallic V–Co–Fe oxide nanoparticle as an efficient and stable electrocatalyst for oxygen evolution reaction

Hydrothermal Synthesis of Unique Hollow Hexagonal Prismatic Pencils of Co₃V₂O₈⋅n H₂O: A New Anode Material for Lithium‐Ion Batteries

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Cobalt vanadate as highly active, stable, noble metal-free oxygen evolution electrocatalyst

Cited by 184 publications

References 36 publications

Cobalt-vanadium bimetal-based nanoplates for efficient overall water splitting

Cobalt-vanadium bimetal-based nanoplates for efficient overall water splitting

A trimetallic V–Co–Fe oxide nanoparticle as an efficient and stable electrocatalyst for oxygen evolution reaction

Hydrothermal Synthesis of Unique Hollow Hexagonal Prismatic Pencils of Co3V2O8⋅n H2O: A New Anode Material for Lithium‐Ion Batteries

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Hydrothermal Synthesis of Unique Hollow Hexagonal Prismatic Pencils of Co₃V₂O₈⋅n H₂O: A New Anode Material for Lithium‐Ion Batteries