Electrochemically formed 3D hierarchical thin films of cobaltemanganese (CoeMn) hexacyanoferrate hybrids for electrochemical applications
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
Electrochemically formed 3D hierarchical thin films of
cobaltemanganese (CoeMn) hexacyanoferrate hybrids for
electrochemical applications
|
|
| Creator |
Venugopal, NKA
Joseph, J |
|
| Subject |
Electrochemical Power Sources
|
|
| Description |
Here we report the feasibility of forming 3D nanostructured hexacyanoferates of Cobalt and Manganese
(CoeMnHCF) on GC surface by a facile electrochemical method. This 3D architecture on glassy carbon
electrode characterised systematically by voltammetry and other physical characterisation techniques
like Field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and Fourier transform
Infrared spectroscopy (FTIR) etc,. Electrochemical Quartz crystal microbalance (EQCM) studies helped out
to calculate the total mass change during CoeMnHCF formation. Electrochemical studies reveal that the
formal redox potentials of both Co and MnHCF films remained close to that of newly formed CoeMnHCF
hybrid films. These 3D modified films were successfully applied for two different electrochemical applications
i) For pseudocapacitor studies in KNO3 medium ii) Investigated the electrocatalytic behaviour
of redox film towards water oxidation reaction in alkaline medium. Electrochemical performances of
newly formed CoeMnHCF are compared with their individual transition metal (Co, Mn) hexacyanoferrates.
The resulting material shows a specific capacitance of 350 F g�1 through its fast reversible
redox reaction of electrochemically formed CoeMnHCF modified film. Interestingly we showed the
overpotential of 450 mV (from its thermodynamic voltage 1.2 V) to attain its optimum current density of
10 mA cm�2 for O2 evolution in alkaline medium
|
|
| Publisher |
Elsevier B.V.
|
|
| Date |
2016
|
|
| Type |
Article
PeerReviewed |
|
| Format |
application/pdf
|
|
| Identifier |
http://cecri.csircentral.net/3172/1/122-2016.pdf
Venugopal, NKA and Joseph, J (2016) Electrochemically formed 3D hierarchical thin films of cobaltemanganese (CoeMn) hexacyanoferrate hybrids for electrochemical applications. Journal of Power Sources, 305. pp. 249-258. ISSN 0378-7753 |
|
| Relation |
http://www.elsevier.com/locate/jpowsour
http://cecri.csircentral.net/3172/ |
|