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Volume 3, Issue 2 (Suppl)
Trends in Green chem
ISSN: 2471-9889
Environmental & Green Chemistry 2017
July 24-26, 2017
Page 101
5
th
International Conference on
6
th
International Conference on
July 24-26, 2017 Rome, Italy
Environmental Chemistry and Engineering
Green Chemistry and Technology
&
Structure and electrochemical properties of recycled active electrodes from spent lead acid battery
and modified with different manganese dioxide contents
Simona Rada
1,2
, C Denisa
1
, H Vermesan
1
, M Rada
2
, P Pascuta
1
and
E Culea
1
1
Technical University of Cluj-Napoca, Romania
2
National Institute for Research and Development of Isotopic and Molecular Technologies, Romania
M
anganese (IV) oxide was widely studied due to their technological importance for catalytic and electrochemical
applications. The addition of MnO
2
to the active electrodes structure of the disassembled car battery is expected to give
new possibilities to extend the properties of these materials by modifying their structure. The structural role of manganese ions
in many oxide glasses is unique. These ions exist in different valence states with different coordination numbers simultaneously
in the host network, which is mainly responsible for significant changes in the structure and physical properties. MnO
2
incorporated into active electrodes structure of the disassembled car batteries were prepared by classical melt-quenching
method. The effect of MnO
2
concentration on the obtained samples was investigated by X-ray diffraction (XRD) analysis,
Fourier Transform InfraRed (FTIR) spectroscopy and measurements of Cyclic Voltammetry (CV). The analysis of IR data
shows that at lower MnO
2
contents, MnO
2
breaks Pb-O-Pb bonds and produces to the formation of non-bridging oxygen
atoms together with the defects known as dangling bonds. At higher MnO
2
content, MnO
2
plays a network former role, joins
the vitrocreamic network as [MnO
4
] and [MnO
6
] structural units. The main reactions for the cathode and anode respectively
can be expressed as:
Cathode: HPbO
2
-
+ H
2
O + 2e
-
→ Pb + 3 HO
-
E
C
=-0.54V
Anode: Pb + 2 HO
-
→ PbO
+ H
2
O + 2e
-
E
A
=+0.58V
Overall cell reaction: HPbO
2
-
→ PbO + HO
-
E=E
C
-E
A
=-0.54-0.58=-1.12V
I
n this case, the potential difference, E between cathodic and anodic reaction is -1.12V.
Biography
Simona Rada is currently working as a Professor in the Department of Physics and Chemistry, Faculty of Material Engineering and Environment, Technical
University of Cluj-Napoca, Romania. She completed her PhD in Chemistry with Inorganic Chemistry specialization. She has been part of many international
conferences and published many scientific papers in many reputed journals.
simona.rada@phys.utcluj.roSimona Rada et al., Trends in Green chem, 3:2
DOI: 10.21767/2471-9889-C1-003