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dc.contributor.authorLi, X
dc.contributor.authorLoh, A
dc.contributor.authorXu, K
dc.contributor.authorWang, B
dc.date.accessioned2018-08-30T11:11:49Z
dc.date.issued2017-06-01
dc.description.abstractOxygen reduction reaction (ORR) catalysts with applications in fuel cells and metal-air batteries can be tailored to overcome the slow kinetics and to reduce overpotentials of the reaction. In this work, a series of amorphous manganese dioxides are synthesised via a chemical redox synthesis method. Synthesis parameters including molar ratio, the order of adding sequence of reactants, pH, and temperature are found to affect the catalyst’s physical and chemical properties such as morphology, lattice hydration, active surface area, and surface properties. The samples are characterised by SEM, BET, XPS and XRD as well as cyclic voltammetry, rotating disc electrode, and gas diffusion electrode measurements. The results indicated that an optimal catalyst sample can be synthesized by reduction of KMnO4 with Mn(CH3COO)2 in MnO4−/Mn2+ molar ratio of 2.67 by addition of KMnO4 into Mn(CH3COO)2 at pH 12, 295 K. The gas diffusion electrode coated with amorphous manganese dioxide catalyst ink in 10:10:2 wt% of MnO2:XC-72R:PTFE with a loading of 2 mg cm−2, was shown to support current densities up to 100 mA cm−2 with improved performance.en_GB
dc.description.sponsorshipAdeline Loh would like to acknowledge the PhD studentship awarded by the College of Engineering, Mathematics and Physical Sciences in the University of Exeter.en_GB
dc.identifier.citationVol. 245, pp. 615 - 624en_GB
dc.identifier.doi10.1016/j.electacta.2017.05.188
dc.identifier.urihttp://hdl.handle.net/10871/33855
dc.language.isoenen_GB
dc.publisherElsevier for International Society of Electrochemistry (ISE)en_GB
dc.rights© 2017. This version is made available under the CC-BY-NC-ND 4.0 license: https://creativecommons.org/licenses/by-nc-nd/4.0/en_GB
dc.subjectamorphous manganese dioxideen_GB
dc.subjectoxygen reduction reactionen_GB
dc.subjectgas diffusion electrodeen_GB
dc.subjectalkaline electrolyteen_GB
dc.titleInfluence of synthesis parameters on amorphous manganese dioxide catalyst electrocatalytic performanceen_GB
dc.typeArticleen_GB
dc.date.available2018-08-30T11:11:49Z
dc.identifier.issn0013-4686
dc.descriptionThis is the author accepted manuscript. The final version is available from Elsevier via the DOI in this recorden_GB
dc.identifier.journalElectrochimica Actaen_GB


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