Qualification: 
MSc
athirakrishnan@am.amrita.in

Athira Krishnan received her M.Sc. in Chemistry from S.N. Collge, Kollam, Kerala University. She joined as Assistant Professor in the Department of Chemistry at Amrita School of Arts and Sciences, Amritapuri Campus on July 2014. Her research interest involve the development of electro/photo catalyst for hydrogen generation reactions, devolopment of inhibitors for prevention of metal corrosion, development of green corrosion inhibitors.

ACHIEVEMENTS

  • First rank in Kerala University for under graduate and post graduate levels.
  • Avail State merit and UGC scholarships.
  • Eligibility for UGC and DST-INSPIRE fellowships.

ONGOING RESEARCH 

  1. Present study mainly deals with the development of ceria based catalyst for photo as well as electo chemical hydrogen generation reaction.
  2. Other work focuses on the development of inhibitors for preventing corrosion of metals. This work also involves the development of green corrosion inhibitors.

CONFERENCE ATTENDED

  • National Conference on 'Machine Learning Approaches in Chemistry - A Trend on Quantom Chemistry' held at S.N. College, Chengannur from August 6-8.   

Publications

Publication Type: Conference Paper

Year of Publication Title

2018

Athira Krishnan, Aswani J, Sukanya Nayar, and S. M. A. Shibli, “Synthesis and Characterization of CeO2 modified reduced-GO nanocomposite for water splitting reaction under visible light irradiation. ”, in MATCOM-2018, A national seminar on “Frontline approaches in material science and computational chemistry” , Department of Chemistry, S.N.Womens, Kollam, 2018.

2017

Athira Krishnan, Bency Joseph, Krishna M Bhaskar, and S. M. A. Shibli, “Fabrication of PANI-TiO2 incorporated Ni-P electrode for alkaline water electrolysis”, in 2017 IEEE International Conference on Technological Advancements in Power and Energy (TAP Energy ), 2017.[Abstract]


Composite incorporated Ni-P electrodes were fabricated for alkaline water electrolysis. The effect of (Polyaniline) PANI-TiO2 polymer composite in hydrogen evolution efficiency of Ni-P electrode in NaOH medium was studied. Characterization of the composites was carried out by XRD and coating composition was confirmed by EDS analysis. Catalytic action of the fabricated electrodes was analysed by polarization and electrochemical impedance spectroscopic techniques. The optimized electrodes exhibited a lower overpotential value of 139 mV for hydrogen evolution reaction at 200 mA cm-2. The composite incorporated electrodes achieved enhanced catalytic activity as a result of improved active sites, increased surface roughness and decreased resistance for electron transfer reaction in comparison with pure Ni-P electrode.

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Publication Type: Journal Article

Year of Publication Title

2018

Athira Krishnan, Bency Joseph, Krishna M Bhaskar, Suma M S, and S. M. A. Shibli, “Unfolding the anticorrosive characteristics of TiO2–WO3 mixed oxidere-inforced polyaniline composite coated mild steel in alkaline environment”, Polymer Composites, 2018.

2018

Athira Krishnan and S.M.A. Shibli, “Optimization of an efficient, economic and eco-friendly inhibitor based on Sesbania grandiflora leaf extract for the mild steel corrosion in aggressive HCl environment”, Anti-Corrosion Methods and Materials, vol. 65, no. 2, pp. 210–216, 2018.[Abstract]


Purpose
This paper aims to evaluate the inhibitive action of different concentrations of Sesbania grandiflora leaf extract on the mild steel corrosion in an aggressive HCl medium under different experimental conditions.
Design/methodology/approach
Weight loss investigation, open-circuit voltage analysis, Tafel polarisation, AC impedance analysis, etc. were used for the evaluation of inhibition efficiency. The influence of immersion period on inhibition efficiency was evaluated. The mechanism of action of the inhibitor is also discussed. Infrared (IR) spectroscopy and energy-dispersive X-ray spectroscopy analysis were used to characterise the passive film.
Findings
The results suggested that 10,000 ppm solution has maximum inhibition efficiency of 98.01 per cent at room temperature, while 1,000 ppm solution also exhibited a better efficiency of about 96.16 per cent. Efficiency of inhibitor solution was found to increase with an increase in its concentration. Polarisation study proposed the solution as an anodic inhibitor. Impedance study confirmed the formation of a protective layer over the surface of the specimen, and the constituents of the film were identified using IR spectroscopy. Stability of the film adsorbed on the steel was cleared from the steady open-circuit potential value. Study on action of the inhibitor under accelerated conditions revealed the fact that the efficiency of extract in preventing corrosion is good under stimulated conditions also.
Practical implications
The action of inhibitor sustains for a sufficient time period and could sustain under stimulated conditions. Hence, its application is practically possible in industries. The proposed inhibitor is widely available and is environmentally safe.
Originality/value
HCl is an industrially important chemical used for acid cleaning, acid pickling, etc. HCl was used as an aggressive corrosion environment. As the chances for mild steel to be in contact with HCl were very high, it was important to develop an efficient, economical and eco-friendly inhibitor for corrosion.

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Publication Type: Conference Proceedings

Year of Publication Title

2017

S. M. A. Shibli, Athira Krishnan, Bency Joseph, and Krishna M Bhaskar, “Green mediated synthesis of CeO2-rGO nanocomposites for hydrogen production under visible light irradiations in Hydrogen Energy and Advanced Materials”, HEAM 2017. department of chemistry, University of Kerala, Kariavattom Campus., 2017.

2017

Shyamily and Athira Krishnan, “Photo catalytic water splitting: recent advances and future challenges”, Hydrogen Energy and Advanced Materials (HEAM 2017). University of Kerala, Kariavattom Campus., 2017.

2017

S. M. A. Shibli, Athira Krishnan, Bency Joseph, and Krishna M Bhaskar, “Green Mediated Synthesis of CeO2-rGO Nanocomposites for Hydrogen Production Under Visible Light Irradiation”, Hydrogen Energy and Advanced Materials (HEAM 2017). University of Kerala, Kariavattom Campus , 2017.