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  Impact of the spatial distribution of morphological patterns on the efficiency of electrocatalytic gas evolving reactions

Žeradjanin, A. R. (2014). Impact of the spatial distribution of morphological patterns on the efficiency of electrocatalytic gas evolving reactions. Journal of the Serbian Chemical Society, 79(3), 325-330. doi:10.2298/JSC131002106Z.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-A0E6-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-A0EA-2
Genre: Journal Article

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 Creators:
Žeradjanin, Aleksandar R.1, Author              
Affiliations:
1Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863354              

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Free keywords: energy efficiency; electrocatalysis; morphology; SECM; activity; stability
 Abstract: The efficiency of electrocatalytic gas evolving reactions (hydrogen, chlorine and oxygen evolution) is a key challenge for important industrial processes, such as chlor-alkali electrolysis or water electrolysis. The central issue for the aforementioned electrocatalytic processes is their huge power consumption. Experimental results accumulated in the past, as well as some predictive models ("volcano" plots) indicate that altering the nature of the electrode material cannot significantly increase the activity of the mentioned reactions. Consequently, it is necessary to find a qualitatively different strategy for improving the energy efficiency of electrocatalytic gas evolving reactions. A usually disregarded fact is that gas evolution is an oscillatory phenomenon. Given the oscillatory behavior, a key parameter of macrokinetics of gas electrode is the frequency of gas-bubble detachment. Bearing in mind that gas evolution greatly depends on the surface morphology, a methodology is proposed that establishes a rational link between the morphological pattern of an electrode with its activity and stability. Characterization was performed using advanced analytical tools. The frequency of gas-bubble detachment was obtained in the configuration of scanning electrochemical microscopy (SECM), while the corrosion stability was analyzed using a miniaturized scanning flow electrochemical cell connected to a mass spectrometer (SFC-ICPMS).

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Language(s): eng - English
 Dates: 2014
 Publication Status: Published in print
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000333770600006
DOI: 10.2298/JSC131002106Z
 Degree: -

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Title: Journal of the Serbian Chemical Society
  Abbreviation : J. Serb. Chem. Soc.
Source Genre: Journal
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Publ. Info: Karnegijeva 4, 11 120 Belgrade, Serbia : Serbian Chemical Society
Pages: - Volume / Issue: 79 (3) Sequence Number: - Start / End Page: 325 - 330 Identifier: ISSN: 0352-5139
CoNE: https://pure.mpg.de/cone/journals/resource/0352-5139