Browsing NTNU Open by Author "Åkre, Torjus"
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Calcination temperature dependent catalytic activity and stability of IrO2 – Ta2O5 anodes for oxygen evolution reaction in aqueous sulfate electrolytes
Xu, Wenting; Haarberg, Geir Martin; Sunde, Svein; Seland, Frode; Ratvik, Arne Petter; zimmerman, erik; Shimamune, T; Gustavsson, J; Åkre, Torjus (Journal article; Peer reviewed, 2017)In this work, commercial IrO2-Ta2O5 anodes with a certain composition calcined at three different temperatures were investigated. The results show that the calcination temperature has a significant influence on the ... -
Electrochemical Behaviour of Industrial IrO2-Ta2O5 Anodes for Copper Electrowinning
Xu, Wenting; Haarberg, Geir Martin; Sunde, Svein; Seland, Frode; Ratvik, Arne Petter; Zimmerman, Erik; Åkre, Torjus (Journal article; Peer reviewed, 2017)In this work, industrial IrO2-Ta2O5 anodes calcined at different temperatures were investigated. The results show that the calcination temperature has significant influence on the surface microstructure including the ... -
Electrowinning of Cobalt from Chloride Solutions: Anodic Deposition of Cobalt Oxide on DSA®
Åkre, Torjus (Doktoravhandlinger ved NTNU, 1503-8181; 2008:101, Doctoral thesis, 2008) -
Sandblasting effect on performance and durability of Ti based IrO2 –Ta2O5 anode in acidic solutions
Xu, Wenting; Haarberg, Geir Martin; Sunde, Svein; Seland, Frode; Ratvik, Arne Petter; Holmin, Susanne; Gustavsson, J; Afvander, Åsa; Zimmerman, Erik; Åkre, Torjus (Journal article; Peer reviewed, 2018)The effect of applying sandblasting during pretreatment while preparing titanium based IrO2 – Ta2O5 anodes by the conventional method was investigated. It was observed that sandblasting influences the surface morphology ... -
Undersøkelse av urenheter i elektrolytt for produksjon av kobber
Arntsen, Anne Sofie (Master thesis, 2023)Tellur-ioner (Te4+ og Te6+), vismut-ioner (Bi3+), antimon-ioner (Sb3+) og klor-ioner (Cl– ) er typiske urenheter i en kobberelektrolytt. Det var ønskelig˚a undersøke disse urenhetene da det er relativt ukjent hva slags ...