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Polarization curves for an alkaline water electrolysis at a small pin vertical electrode to produce hydrogen
Author(s) -
Mandin Ph.,
Wüthrich R.,
Roustan H.
Publication year - 2010
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.12153
Subject(s) - electrolysis , electrode , polarization (electrochemistry) , anode , electrochemistry , alkaline water electrolysis , electrolysis of water , hydrogen , hydrogen production , electrolytic process , standard hydrogen electrode , materials science , reversible hydrogen electrode , voltage , chemistry , reference electrode , analytical chemistry (journal) , electrical engineering , electrolyte , environmental chemistry , engineering , organic chemistry
During two‐phase electrolysis for hydrogen production, according with alkaline–water electrolysis process, there are bubbles which are created at electrodes which imply a great hydrodynamic acceleration in the normal earth gravity field and then a quite important electrical properties and electrochemical processes disturbance, for both transport and reaction. This disturbance can lead to the modification of the local current density and to anode effects for example. In this work, a model experimental set‐up is studied. The vertical pine electrode of small electro active surface area is surrounded with a large surface counter electrode. The hydrogen production is performed at the working electrode and effort is focused here upon the global electrochemical cell electrical performances. The polarization curves intensity vs. applied voltage are experimentally measured and presented for different factors such as: the electro active species concentration, nature and counter electrode diameter factors. © 2010 American Institute of Chemical Engineers AIChE J, 2010