Efficient direct seawater electrolysers using selective alkaline NiFe-LDH as OER catalyst in asymmetric electrolyte feeds

Dresp, SörenThanh, Trung NgoKlingenhof, MalteBrückner, SvenHauke, PhilippStrasser, Peter2020-06-262020-06-262020-05-201754-5692https://depositonce.tu-berlin.de/handle/11303/11465http://dx.doi.org/10.14279/depositonce-10347Direct seawater electrolysis faces fundamental catalytic and process engineering challenges. Here we demonstrate a promising seawater electrolyser configuration using asymmetric electrolyte feeds. We further investigated the faradaic O2 efficiency of NiFe-LDH in alkalinized Cl−-containing electrolytes in comparison to commercial IrOx-based catalysts. Other than IrOx, NiFe-LDH prevents the oxidation of Cl− and appears highly selective for the oxygen evolution reaction in alkalinized seawater even at cell potentials beyond 3.0 Vcell.en540 Chemie und zugeordnete Wissenschaftendirect seawater electrolysisoxygen evolution reactioncatalystsEfficient direct seawater electrolysers using selective alkaline NiFe-LDH as OER catalyst in asymmetric electrolyte feedsArticle1754-5706