Abstract
Overcoming the challenge of developing highly durable and conductive support materials for Ir-based electrocatalysts in the acidic oxygen evolution reaction (OER) is difficult due to the highly corrosive conductions experienced during anodic process. In this research, we develop IrOx/Ba3TiO7 electrocatalysts, which employ Ba3TiO7 as a new support material, to minimize loading amount of iridium. We also try to fabricated Ba3TiO(7-x) support material with abundant oxygen vacancies for enhanced conductivity of the support material. As a results, the IrOx/Ba3TiO7 electrocatalysts demonstrated remarkable OER performances and enhanced mass activity compared to unsupported IrOx electrocatalysts. Through a combination of physical and chemical analyses, It was elucidated that the excellent thermodynamic stability and electrical conductivity of Ba3TiO7 effectively enhanced the mass activity of IrOx/Ba3TiO7 electrocatalysts. These finding provide further insight into new category of anode support materials for proton exchange membrane water electrolyzer.
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