Carbonate formation lowers the electrocatalytic activity of perovskite oxides for water electrolysis
Christoph Baeumer, Allen Yu-Lun Liang, Urška Trstenjak, Qiyang Lu, Rainer Waser, J. Tyler Mefford, Felix Gunkel, Slavomír Nemšák, William C. Chueh
Abstract
Electrocatalytic activity depends on surface properties and therefore changes on air-exposure. We show that clean LaNiO 3 OER catalysts are more active than their air-exposed counterparts where surface carbonate groups block the nickel active sites.
Topics & Concepts
ElectrolysisLanioCarbonatePerovskite (structure)Electrolysis of waterInorganic chemistryNickelRoastingMaterials scienceChemistryChemical engineeringMetallurgyElectrodeElectrolyteOrganic chemistryPhysical chemistryFerroelectricityOptoelectronicsEngineeringDielectricElectrocatalysts for Energy ConversionAdvanced battery technologies researchFuel Cells and Related Materials