Electrochemical-driven water splitting catalyzed by a water-soluble cobalt(II) complex supported by N,N′-bis(2′-pyridinecarboxamide)-1,2-benzene with high turnover frequency

Wang, Zhuo-Qiang; Tang, Ling‐Zhi; Zhang, Yunxiao; Zhan, Shu‐Zhong; Ye, Jianshan

doi:10.1016/j.jpowsour.2015.04.031

Cited by 47 publications

(28 citation statements)

References 61 publications

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“…Within this context, we have been designing molecular catalysts based on the water-soluble complexes with simple ligands. As an expanded work [20], reported here is a water-soluble cobalt(II) electrocatalyst, [CoA 2 (H 2 O) 2 ] 1 that can electro-catalyze 3 water reduction with a TOF of 350.7 moles of hydrogen per mole of catalyst per hour at an overpotential of 687.6 mV (in buffer, pH 7.0). We hope this can establish a new method in water reduction catalysis using inexpensive and earth-abundant material in purely aqueous media.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen evolution catalyzed by a water-soluble cobalt(II) complex with picolinic acid ions

Tang

Zhang

et al. 2016

International Journal of Hydrogen Energy

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A new molecular catalyst based on cobalt(II) complex [CoA 2 (H 2 O) 2 ] 1 (A: picolinic acid ion) is prepared by the reaction of picolinic acid (HA) with CoCl 2 ⋅6H 2 O.Electrochemical studies indicate 1 is a homogeneous electrocatalyst for water reduction in a purely aqueous medium. 1 can catalyze hydrogen evolution from water with a turnover frequency (TOF) of 350.6 moles of hydrogen per mole of catalyst per hour at an overpotential of 687.6 mV (in buffer, pH 7.0).

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Section: Introductionmentioning

confidence: 99%

Hydrogen evolution catalyzed by a water-soluble cobalt(II) complex with picolinic acid ions

Tang

Zhang

et al. 2016

International Journal of Hydrogen Energy

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“…So far RuO 2 and IrO 2 are the most effective catalysts for OER, but the high price and limited natural sources lead to search for alternative materials. The transition metal-based OER catalysts, especially cobalt-and nickel-containing oxide, hydroxide and oxyhydroxide, are reasonable selection due to their photocatalytic and electrocatalytic activity in OER, good stability and earth abundant nature [4][5][6][7][8][9][10][11][12][13][14]. A spinel-type cobalt oxide Co 3 O 4 , consisting of Co 2? at tetrahedral sites and Co 3? at octahedral sites, exhibits great electrocatalytic activity and stability in alkaline media [15,16].…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic and pseudocapacitive properties of cobalt (hydro)oxide films on sintered metal fiber filter

Barauskienė

Valatka

2017

Mater Renew Sustain Energy

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Cobalt (hydro)oxide films on Bekipor ST 20AL3 sintered metal fiber were formed by electrochemical deposition under galvanostatic conditions using different electrolyte baths (nitrate, acetate and chloride). Cobalt oxide films were prepared via thermal treatment of as-deposited specimens at 673 K. Electroactive surface area of as-deposited and annealed films was estimated using oxidation-reduction system containing ferricyanide/ferrocyanide. Electrocatalytic and pseudocapacitive properties of the prepared films were investigated using 0.1 M NaOH aqueous solutions. The maximum specific capacitance of 1324 F g -1 was observed for a-Co(OH) 2 films electrodeposited from nitrate-containing electrolyte. Similarly, the highest electrocatalytic activity and stability in oxygen evolution reaction (OER) was determined to be characteristic for Co 3 O 4 films derived from nitrate bath.

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“…[11] s-Organo-cobalt(III) complexes made with this tetradentate dianionic pyridineamido ligand have been found to be convenient air-stable modelsfor cobalamine chemistry. [13] However,n or eports exist so far on the use of bpb-based complexes for oxidation of amines.T he high water solubility and structural similarities with porphyrin-based catalysts made us explore oxidation reactions of primary amines using the cobalt complex of this ligand. [13] However,n or eports exist so far on the use of bpb-based complexes for oxidation of amines.T he high water solubility and structural similarities with porphyrin-based catalysts made us explore oxidation reactions of primary amines using the cobalt complex of this ligand.…”

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confidence: 99%

Aerobic Oxidation of Primary Amines to Imines in Water using a Cobalt Complex as Recyclable Catalyst under Mild Conditions

Hazra

Pilania

Deb

et al. 2018

Chemistry A European J

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Oxidative coupling of primary amines to imines has been achieved by using a water soluble cobalt complex as catalyst and air as the oxidant at near ambient conditions. Aromatic, heteroaromatic and aliphatic amines were successfully converted to the corresponding imines with yields of up to 96 %. A 20 gram scale reaction for the synthesis of imine from benzylamine in good yield is also demonstrated with this method. The catalyst has been found to be reusable with up to five cycles. It is highly efficient, gives a turnover number (TON) of up to 128, and shows chemoselectivity with the only byproducts being water and ammonia. Control experiments and mechanistic studies indicate that the Co /Co catalytic cycle is responsible for these oxidative transformations. Some of the reactive intermediates of this reaction have also been isolated and structurally characterized.

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Electrochemical-driven water splitting catalyzed by a water-soluble cobalt(II) complex supported by N,N′-bis(2′-pyridinecarboxamide)-1,2-benzene with high turnover frequency

Cited by 47 publications

References 61 publications

Hydrogen evolution catalyzed by a water-soluble cobalt(II) complex with picolinic acid ions

Hydrogen evolution catalyzed by a water-soluble cobalt(II) complex with picolinic acid ions

Electrocatalytic and pseudocapacitive properties of cobalt (hydro)oxide films on sintered metal fiber filter

Aerobic Oxidation of Primary Amines to Imines in Water using a Cobalt Complex as Recyclable Catalyst under Mild Conditions

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