Preparation and electrochemical performance of nanosized Co3O4 via hydrothermal method

Yang, You-ping; Liu, Ren-sheng; Huang, Kelong; Wang, Liping; Liu, Suqin; Zeng, Wenwen

doi:10.1016/s1003-6326(07)60272-6

Cited by 22 publications

(10 citation statements)

References 14 publications

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“…The wide bands observed at 3384-3392 cm -1 correspond to the axial deformation of OHgroups in intermolecular hydrogen bonds, 23 and/or water. 7,24 An additional band was also observed at 1631-1640 cm -1 , which can be assigned to the presence of water molecules, thus confirming that both OHgroups and water molecules are present in the cobalt colloids. 7 Two bands observed between 2936-2948 and 2881-2875 cm -1…”

Section: Research Articlementioning

confidence: 57%

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Effects of precursor salt on colloidal cobalt oxyhydroxides composition and its application in non-enzymatic glucose

Стадник¹,

Mariani²,

Anaissi³

2017

S.Afr.j.chem.

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Colloidal cobalt oxyhydroxide [CoO(OH)] has been prepared from precursors cobalt acetate and cobalt nitrate. The cobalt colloids (Co.Acetate and Co.Nitrate) were characterized by simultaneous thermogravimetric/differential thermal analysis, scanning electron microscopy with energy-dispersive X-ray spectroscopy, Fourier transform infrared and electronic spectroscopy. Characterization data indicated the presence of counter ions (CH 3 COOand NO 3-), likely intercalated within the structure of the colloidal cobalt. The platinum working electrode chemically modified with cobalt colloid was studied by cyclic voltammetry in alkaline solution [0.5 M, NaOH], which revealed differences in the reproducibility and stability of the electroactive material. The colloidal Co.Nitrate modified electrode was applied to the non-enzymatic glucose (Glu) electrooxidation in the concentration range from 7.2 to 21.9 × 10-8 mol L-1. The limits of detection (5.87 × 10-8 mol L-1) and quantitation (1.96 × 10-7 mol L-1) calculated suggest that colloidal Co.Nitrate has the potential to be used as a sensor for low glucose concentration.

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Section: Research Articlementioning

confidence: 57%

“…Three mass loss events were related to the decomposition of the acetate precursor. Firstly, the loss of hydration water takes place, followed by the release of acetic acid, 24 and release of CO 2 ( Fig. 1A) is observed.…”

Section: Thermal Behaviour (Tga-dta)mentioning

confidence: 99%

Effects of precursor salt on colloidal cobalt oxyhydroxides composition and its application in non-enzymatic glucose

Стадник¹,

Mariani²,

Anaissi³

2017

S.Afr.j.chem.

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“…Thin nanostructured oxide layers produced by electrodeposition have been used as appropriate materials for different electrochemical processes, ranging from anticorrosive to electrocatalytic properties [4][5][6][7][8][9] . Among the electrocatalytic coatings, there is a great interest in those useful to enhance the O 2 and H 2 evolution reactions (respectively, oxygen evolution reaction -OER, and hydrogen evolution reaction -HER), which are important in several technological processes, such as water electrolysis, fuel cells, batteries and sensors 1,[10][11][12][13][14][15][16][17] . HER and OER are directly related to the demand for sustainable clean energy and concerns about climate change and global warming.…”

Section: Introductionmentioning

confidence: 99%

“…Although noble metals, such as Pt, Au, Ag, Ru and Ir, are generally used as electrodes for OER, they have high cost and low stability in alkaline medium [10][11][12] . Therefore, there is a growing demand to replace these metals by alternative catalysts with low cost and similar performance 15,16,18 .…”

Section: Introductionmentioning

confidence: 99%

“…Transition metal oxides, such as Ni, Co, V, Fe, as well as Sn oxides, present electrocatalytic properties, which make them attractive alternatives electrodes for several reactions, including OER 16 . Among them, the Co 3 O 4 is an interesting material to be used for this purpose 11,12 . The insertion of the Ni in the Co 3 O 4 structure forms the mixed oxide NiCo 2 O 4 , nickel cobaltite.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Electrolyte pH on the Ni-Co Mixed Oxides Coatings Produced from Citrate Baths

et al. 2018

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In this work, Ni-Co oxides coatings were produced using electrochemical techniques (chronopotentiometry and/or linear voltammetry) and solutions containing Ni 2+ and Co 2+ ions in the molar ratio 1: 2, sodium citrate as the ligand, and different pH values (7.5 and 10.5). Energy dispersive spectrometry (EDS), scanning electron microscopy (SEM), Raman spectroscopy (LRS) and electrochemical impedance spectroscopy (EIS) were used to characterize these coatings. The results showed that both pH values favored the production of Ni-Co oxide phases, independent of the electrochemical technique used. The EDS analysis indicated that it was possible to produce of oxides coating presenting different Ni:Co ratios using electrodeposition process. However, the morphology, the microstructure and the electrocatalytic ability of the coatings depended on both the pH and on the electrochemical technique used to produce them. The coatings produced using pH 10.5 were suitable to be used as electrocatalysts for the oxygen evolution reaction (OER).

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Progress in silica polypeptide composite colloidal hybrids: from silica cores to fuzzy shells

et al. 2014

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Preparation and electrochemical performance of nanosized Co3O4 via hydrothermal method

Cited by 22 publications

References 14 publications

Effects of precursor salt on colloidal cobalt oxyhydroxides composition and its application in non-enzymatic glucose

Effects of precursor salt on colloidal cobalt oxyhydroxides composition and its application in non-enzymatic glucose

The Effect of Electrolyte pH on the Ni-Co Mixed Oxides Coatings Produced from Citrate Baths

Progress in silica polypeptide composite colloidal hybrids: from silica cores to fuzzy shells

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