Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12188/444
DC Field | Value | Language |
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dc.contributor.author | P. Paunovic, O. Popovski, A. Dimitrov, D. Slavkov, E. Lefterova, S. Hadzi Jordanov | en_US |
dc.date.accessioned | 2018-10-28T11:19:23Z | - |
dc.date.available | 2018-10-28T11:19:23Z | - |
dc.date.issued | 2007-04 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.12188/444 | - |
dc.description.abstract | Structural and electrochemical characteristics of hypo–hyper d-electrocatalytic materials aimed for preparation of electrodes for hydrogen evolution were studied. The basic catalytic material was prepared of 10% amorphous Co (grain size <2 nm), 18% amorphous TiO2 and Vulcan XC-72, by sol–gel procedure. A number of modifications were applied aimed at improving the materials performances: (i) TiO2 was transformed into anatase by heating at 480 ◦C for 1 h, (ii) multiwalled carbon nanotubes (MWCNT) were used as a catalyst support instead of Vulcan XC-72 and (iii) Mo was added to Co phase in a quantity of 25 at.% (Mo:Co = 1:3). Both, material’s intrinsic catalytic activity and surface area were affected by these modifications. As a result, the electrocatalytic activity for hydrogen evolution was improved, e.g. transformation of TiO2 into anatase form lowers the HER overpotential (η) for 15mV at 60mAcm−2. Introduction of MWCNTs lowered η for 30mV, while addition of Mo to metallic phase for 40mV. The complete modification of all three catalyst’s components (10% MoCo3 + 18% anatase + MWCNTs) was the most effective with 60mV decrease of overpotential. Characterization was made by XRD, SEM, IR and XPS methods. Surface area was measured by means of cyclic voltammetry. | en_US |
dc.language.iso | en | en_US |
dc.publisher | Elsevier | en_US |
dc.relation.ispartof | Electrochimica Acta | en_US |
dc.title | Study of structural and electrochemical characteristics of Co-based hypo–hyper d-electrocatalysts for hydrogen evolution | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1016/j.electacta.2007.01.053 | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
Appears in Collections: | Faculty of Technology and Metallurgy: Journal Articles |
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File | Description | Size | Format | |
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2007 EA.pdf | 934.59 kB | Adobe PDF | View/Open |
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