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dc.contributor.authorSymes, Daniel
dc.contributor.authorTaylor-Cox, Connie
dc.contributor.authorHolyfield, Leighton
dc.contributor.authorAl-Duri, Bushra
dc.contributor.authorDhir, Aman
dc.date.accessioned2018-06-07T10:44:20Z
dc.date.available2018-06-07T10:44:20Z
dc.date.issued2014-03-21
dc.identifier.citationFeasibility of an oxygen-getter with nickel electrodes in alkaline electrolysers 2014, 3 (2) Materials for Renewable and Sustainable Energy
dc.identifier.issn2194-1459
dc.identifier.issn2194-1467
dc.identifier.doi10.1007/s40243-014-0027-4
dc.identifier.urihttp://hdl.handle.net/2436/621333
dc.description.abstractAlkaline electrolysis is the long-established technology for water splitting to produce hydrogen and has been industrially used since the nineteenth century. The most common materials used for the electrodes are nickel and derivatives of nickel (e.g. Raney nickel). Nickel represents a cost-effective electrode material due to its low cost (compared to platinum group metals), good electrical conductivity and exhibits good resistance to corrosive solutions. The steady degradation of the nickel electrodes over time is known as a result of oxide layer formation on the electrode surface. Reducing oxide layer growth on the electrode surface will increase the efficiency and lifetime of the electrolyser. Titanium has a higher affinity to oxygen than nickel so has been introduced to the electrolyser as a sacrificial metal to reduce oxide layer formation on the nickel. Two identical electrolysers were tested with one difference: Cell B had titanium chips present in the electrolyte solution, whilst Cell A did not have titanium present. SEM results show a reduction of 16 % in the thickness of the Cell B oxide layer on nickel compared to the Cell A nickel, which is supported by the large increase in oxide layer build-up on the titanium in Cell B. EDX on the same samples showed on average a 59 % decrease in oxygen on the Cell B nickel compared to Cell A. XPS surface analysis of the same samples showed a 17 % decrease in the oxygen on Cell B nickel. These results support the hypothesis that adding titanium to an alkaline electrolyser system with nickel electrodes can reduce the oxide layer formation on the nickel.
dc.language.isoen
dc.relation.urlhttp://link.springer.com/10.1007/s40243-014-0027-4
dc.subjectOxygen-getter
dc.subjectHydrogen production
dc.subjectWater electrolysis
dc.subjectAlkaline electrolysis
dc.subjectElectrode degradation
dc.subjectTitanium
dc.subjectElectrolyser
dc.titleFeasibility of an oxygen-getter with nickel electrodes in alkaline electrolysers
dc.typeJournal article
dc.identifier.journalMaterials for Renewable and Sustainable Energy
refterms.dateFOA2018-08-20T14:39:22Z
html.description.abstractAlkaline electrolysis is the long-established technology for water splitting to produce hydrogen and has been industrially used since the nineteenth century. The most common materials used for the electrodes are nickel and derivatives of nickel (e.g. Raney nickel). Nickel represents a cost-effective electrode material due to its low cost (compared to platinum group metals), good electrical conductivity and exhibits good resistance to corrosive solutions. The steady degradation of the nickel electrodes over time is known as a result of oxide layer formation on the electrode surface. Reducing oxide layer growth on the electrode surface will increase the efficiency and lifetime of the electrolyser. Titanium has a higher affinity to oxygen than nickel so has been introduced to the electrolyser as a sacrificial metal to reduce oxide layer formation on the nickel. Two identical electrolysers were tested with one difference: Cell B had titanium chips present in the electrolyte solution, whilst Cell A did not have titanium present. SEM results show a reduction of 16 % in the thickness of the Cell B oxide layer on nickel compared to the Cell A nickel, which is supported by the large increase in oxide layer build-up on the titanium in Cell B. EDX on the same samples showed on average a 59 % decrease in oxygen on the Cell B nickel compared to Cell A. XPS surface analysis of the same samples showed a 17 % decrease in the oxygen on Cell B nickel. These results support the hypothesis that adding titanium to an alkaline electrolyser system with nickel electrodes can reduce the oxide layer formation on the nickel.


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