Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 80: Issue 3
Thermal characterisation of chemically reduced electrolytic manganese dioxide
Authors:
B. Liu Department of Chemistry, Materials and Forensic Sciences, University of Technology Sydney, PO Box 123, Broadway, NSW 2007, Australia

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P. S. Thomas Department of Chemistry, Materials and Forensic Sciences, University of Technology Sydney, PO Box 123, Broadway, NSW 2007, Australia

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R. P. Williams Delta-EMD Australia Pty Limited McIntosh Drive, Mayfield West, 2304, Australia

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S. W. Donne Discipline of Chemistry, University of Newcastle Callaghan, NSW 2308, Australia

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Pages:
625–629
Online Publication Date:
31 May 2005
Publication Date:
01 Jun 2005
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-005-0704-8
Keywords:
reduction; TG-MS; X-ray crystallography; electrolytic manganese dioxide
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Summary Samples of electrolytic manganese dioxide (EMD) were chemically reduced using 2-propanol under reflux (82°C) for 1, 2, 3, 6 and 24 h intervals. XRD analysis showed that the ?-MnO2 structure was preserved although the lattice dimensions were observed to increase with increasing degree of reduction to accommodate the intercalation of protons. The exception was the 24 h reduced sample which contained two phases; ? -MnO2 and ? -MnOOH. Three regions of decomposition in the range of 50 to 1000°C were observed using thermogravimetric analysis coupled with mass spectrometry (TG-MS) and were accounted for as water removal below 390°C, reduction of MnO2 to Mn2O3 between 400 and 600°C, and Mn2O3 to Mn3O4 between 600 and 1000°C. Again the exception proved to be the 24 h reduced sample which was observed to decompose predominantly in one step between 400 and 600°C directly to Mn3O4.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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